[X64] [MichalPetryka] Simplify and optimize Math(F).Round

[MihuBot]

Build completed in 2 hours 15 minutes.
dotnet/runtime#98186

CoreLib diffs

Found 2 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 6824581
Total bytes of diff: 6827595
Total bytes of delta: 3014 (0.04 % of base)
Total relative delta: 74.85
    diff is a regression.
    relative diff is a regression.


Total byte diff includes 1355 bytes from reconciling methods
	Base had    1 unique methods,        3 unique bytes
	Diff had   10 unique methods,     1358 unique bytes

Top file regressions (bytes):
        3014 : System.Private.CoreLib.dasm (0.04 % of base)

1 total files with Code Size differences (0 improved, 1 regressed), 0 unchanged.

Top method regressions (bytes):
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int,int):double (FullOpts)
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int,int):float (FullOpts)
         243 (1,104.55 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int):float (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int):float (FullOpts) (2 methods)
         224 (355.56 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int,int):System.Half (FullOpts)
         218 (436.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts) (2 methods)
         200 (166.67 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int):System.Half (FullOpts) (2 methods)
         165 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[double](double,System.String) (FullOpts) (0 base, 1 diff methods)
         156 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Numerics.Vector`1[float]](System.Numerics.Vector`1[float],System.String) (FullOpts) (0 base, 1 diff methods)
         154 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Nullable`1[int]](System.Nullable`1[int],System.String) (FullOpts) (0 base, 1 diff methods)
         150 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[short](short,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[long](long,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[ubyte](ubyte,System.String) (FullOpts) (0 base, 1 diff methods)
         142 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.__Canon](System.__Canon,System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String) (FullOpts) (0 base, 1 diff methods)

Top method improvements (bytes):
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int,int):double (FullOpts)
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int,int):float (FullOpts)
          -3 (-100.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.CompilerServices.RuntimeHelpers:IsKnownConstant(int):ubyte (FullOpts) (1 base, 0 diff methods)

Top method regressions (percentages):
         165 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[double](double,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[long](long,System.String) (FullOpts) (0 base, 1 diff methods)
         150 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[short](short,System.String) (FullOpts) (0 base, 1 diff methods)
         142 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.__Canon](System.__Canon,System.String) (FullOpts) (0 base, 1 diff methods)
         154 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Nullable`1[int]](System.Nullable`1[int],System.String) (FullOpts) (0 base, 1 diff methods)
         156 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Numerics.Vector`1[float]](System.Numerics.Vector`1[float],System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[ubyte](ubyte,System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String) (FullOpts) (0 base, 1 diff methods)
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int,int):double (FullOpts)
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int,int):float (FullOpts)
         243 (1,104.55 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int):float (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int):float (FullOpts) (2 methods)
         218 (436.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts) (2 methods)
         224 (355.56 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int,int):System.Half (FullOpts)
         200 (166.67 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int):System.Half (FullOpts) (2 methods)

Top method improvements (percentages):
          -3 (-100.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.CompilerServices.RuntimeHelpers:IsKnownConstant(int):ubyte (FullOpts) (1 base, 0 diff methods)
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int,int):double (FullOpts)
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int,int):float (FullOpts)

23 total methods with Code Size differences (3 improved, 20 regressed), 55774 unchanged.

--------------------------------------------------------------------------------

Frameworks diffs

Diffs

Found 260 files with textual diffs.

Summary of Code Size diffs:
(Lower is better)

Total bytes of base: 38296082
Total bytes of diff: 38299382
Total bytes of delta: 3300 (0.01 % of base)
Total relative delta: 86.66
    diff is a regression.
    relative diff is a regression.


Total byte diff includes 1355 bytes from reconciling methods
	Base had    1 unique methods,        3 unique bytes
	Diff had   10 unique methods,     1358 unique bytes

Top file regressions (bytes):
        3014 : System.Private.CoreLib.dasm (0.04 % of base)
         247 : System.Numerics.Tensors.dasm (0.20 % of base)
          39 : System.Runtime.Numerics.dasm (0.03 % of base)

3 total files with Code Size differences (0 improved, 3 regressed), 253 unchanged.

Top method regressions (bytes):
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int,int):double (FullOpts)
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int,int):float (FullOpts)
         247 (1,176.19 % of base) : System.Numerics.Tensors.dasm - System.Numerics.Tensors.TensorPrimitives+RoundFallbackOperator`1[double]:Invoke(double):double:this (FullOpts)
         243 (1,104.55 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int):float (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int):float (FullOpts) (2 methods)
         224 (355.56 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int,int):System.Half (FullOpts)
         218 (436.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts) (2 methods)
         200 (166.67 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int):System.Half (FullOpts) (2 methods)
         165 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[double](double,System.String) (FullOpts) (0 base, 1 diff methods)
         156 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Numerics.Vector`1[float]](System.Numerics.Vector`1[float],System.String) (FullOpts) (0 base, 1 diff methods)
         154 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Nullable`1[int]](System.Nullable`1[int],System.String) (FullOpts) (0 base, 1 diff methods)
         150 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[short](short,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[long](long,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[ubyte](ubyte,System.String) (FullOpts) (0 base, 1 diff methods)
         142 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.__Canon](System.__Canon,System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String) (FullOpts) (0 base, 1 diff methods)
          39 (4.86 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:get_DebuggerDisplay():System.String:this (FullOpts)

Top method improvements (bytes):
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int,int):double (FullOpts)
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int,int):float (FullOpts)
          -3 (-100.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.CompilerServices.RuntimeHelpers:IsKnownConstant(int):ubyte (FullOpts) (1 base, 0 diff methods)

Top method regressions (percentages):
         165 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[double](double,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[long](long,System.String) (FullOpts) (0 base, 1 diff methods)
         150 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[short](short,System.String) (FullOpts) (0 base, 1 diff methods)
         142 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.__Canon](System.__Canon,System.String) (FullOpts) (0 base, 1 diff methods)
         154 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Nullable`1[int]](System.Nullable`1[int],System.String) (FullOpts) (0 base, 1 diff methods)
         156 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[System.Numerics.Vector`1[float]](System.Numerics.Vector`1[float],System.String) (FullOpts) (0 base, 1 diff methods)
         149 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[ubyte](ubyte,System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String) (FullOpts) (0 base, 1 diff methods)
          72 (Infinity of base) : System.Private.CoreLib.dasm - System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String) (FullOpts) (0 base, 1 diff methods)
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int,int):double (FullOpts)
         249 (1,556.25 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int,int):float (FullOpts)
         247 (1,176.19 % of base) : System.Numerics.Tensors.dasm - System.Numerics.Tensors.TensorPrimitives+RoundFallbackOperator`1[double]:Invoke(double):double:this (FullOpts)
         243 (1,104.55 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Double:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int):double (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int):float (FullOpts) (2 methods)
         230 (605.26 % of base) : System.Private.CoreLib.dasm - System.Single:Round(float,int):float (FullOpts) (2 methods)
         218 (436.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts) (2 methods)
         224 (355.56 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int,int):System.Half (FullOpts)
         200 (166.67 % of base) : System.Private.CoreLib.dasm - System.Half:Round(System.Half,int):System.Half (FullOpts) (2 methods)
          39 (4.86 % of base) : System.Runtime.Numerics.dasm - System.Numerics.BigInteger:get_DebuggerDisplay():System.String:this (FullOpts)

Top method improvements (percentages):
          -3 (-100.00 % of base) : System.Private.CoreLib.dasm - System.Runtime.CompilerServices.RuntimeHelpers:IsKnownConstant(int):ubyte (FullOpts) (1 base, 0 diff methods)
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.Math:Round(double,int,int):double (FullOpts)
        -322 (-55.61 % of base) : System.Private.CoreLib.dasm - System.MathF:Round(float,int,int):float (FullOpts)

25 total methods with Code Size differences (3 improved, 22 regressed), 238546 unchanged.

--------------------------------------------------------------------------------

Artifacts:

• build-artifacts-main.zip (662 MB)
• build-clr-checked-main.zip (74 MB)
• build-artifacts-pr.zip (662 MB)
• build-clr-checked-pr.zip (74 MB)
• jit-diffs-corelib.zip (47 MB)
• diff-corelib.txt (8 KB)
• jit-diffs-frameworks.zip (251 MB)
• diff-frameworks.txt (9 KB)
• build-logs.txt (1 MB)

[MihuBot]

Top method regressions

249 (1,556.25 % of base) - System.Double:Round(double,int,int):double

 ; Assembly listing for method System.Double:Round(double,int,int):double (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
-; fully interruptible
+; rbp based frame
+; partially interruptible
 ; No PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T02] (  3,  3   )  double  ->  mm0         single-def
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
-;  V02 arg2         [V02,T01] (  3,  3   )     int  ->  rsi         single-def
+;  V00 arg0         [V00,T04] (  4,  3.50)  double  ->  mm0         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
+;  V02 arg2         [V02,T01] (  5,  3   )     int  ->  rbx         single-def
 ;# V03 OutArgs      [V03    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
+;  V04 tmp1         [V04,T03] (  4,  7   )  double  ->  mm1         "Inlining Arg"
+;* V05 tmp2         [V05    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[double]>
+;  V06 tmp3         [V06,T07] (  3,  1.50)  double  ->  mm2         "Inline stloc first use temp"
+;* V07 tmp4         [V07    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
+;  V08 tmp5         [V08,T05] (  6,  3   )  double  ->  mm3         "Inline return value spill temp"
+;  V09 tmp6         [V09,T02] (  7,  7   )  double  ->  mm3         "Inlining Arg"
+;* V10 tmp7         [V10    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
+;* V11 tmp8         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V05._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp9         [V12    ] (  0,  0   )     int  ->  zero-ref    "field V05._length (fldOffset=0x8)" P-INDEP
+;* V13 tmp10        [V13    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V14 tmp11        [V14    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
+;  V15 tmp12        [V15,T08] (  2,  0   )     ref  ->  rsi         single-def "argument with side effect"
+;  V16 rat0         [V16,T06] (  3,  3   )  simd16  ->  mm0         "ReplaceWithLclVar is creating a new local variable"
 ;
-; Lcl frame size = 0
+; Lcl frame size = 8
 
 G_M1831_IG01:
+       push     rbp
+       push     rbx
+       push     rax
        vzeroupper 
-						;; size=3 bbWeight=1 PerfScore 1.00
+       lea      rbp, [rsp+0x10]
+       mov      ebx, esi
+						;; size=13 bbWeight=1 PerfScore 4.75
 G_M1831_IG02:
-       mov      rax, 0xD1FFAB1E      ; code for System.Math:Round(double,int,int):double
-						;; size=10 bbWeight=1 PerfScore 0.25
+       vmovaps  xmm1, xmm0
+       cmp      edi, 15
+       ja       G_M1831_IG12
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovsd   xmm3, qword ptr [reloc @RWD16]
+       vucomisd xmm3, xmm2
+       jbe      G_M1831_IG10
+						;; size=39 bbWeight=1 PerfScore 9.50
 G_M1831_IG03:
-       tail.jmp [rax]System.Math:Round(double,int,int):double
-						;; size=3 bbWeight=1 PerfScore 2.00
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovsd   xmm2, qword ptr [rsi+8*rdi]
+       vmulsd   xmm3, xmm0, xmm2
+       cmp      ebx, 4
+       ja       G_M1831_IG13
+       mov      edi, ebx
+       lea      rsi, [reloc @RWD24]
+       mov      esi, dword ptr [rsi+4*rdi]
+       lea      rax, G_M1831_IG02
+       add      rsi, rax
+       jmp      rsi
+						;; size=54 bbWeight=0.50 PerfScore 7.38
+G_M1831_IG04:
+       vmovups  xmm0, xmmword ptr [reloc @RWD48]
+       vmovaps  xmm1, xmm3
+       vandpd   xmm1, xmm1, xmm0
+       vandnpd  xmm0, xmm0, xmmword ptr [reloc @RWD64]
+       vorpd    xmm0, xmm0, xmm1
+       vaddsd   xmm3, xmm0, xmm3
+       vroundsd xmm3, xmm3, xmm3, 11
+       jmp      SHORT G_M1831_IG09
+						;; size=40 bbWeight=0.50 PerfScore 8.96
+G_M1831_IG05:
+       vroundsd xmm3, xmm3, xmm3, 4
+       jmp      SHORT G_M1831_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M1831_IG06:
+       vroundsd xmm3, xmm3, xmm3, 11
+       jmp      SHORT G_M1831_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M1831_IG07:
+       vroundsd xmm3, xmm3, xmm3, 9
+       jmp      SHORT G_M1831_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M1831_IG08:
+       vroundsd xmm3, xmm3, xmm3, 10
+						;; size=6 bbWeight=0.50 PerfScore 3.50
+G_M1831_IG09:
+       vdivsd   xmm1, xmm3, xmm2
+						;; size=4 bbWeight=0.50 PerfScore 6.00
+G_M1831_IG10:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M1831_IG11:
+       add      rsp, 8
+       pop      rbx
+       pop      rbp
+       ret      
+						;; size=7 bbWeight=1 PerfScore 2.25
+G_M1831_IG12:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+G_M1831_IG13:
+       mov      edi, 0x45B
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rsi, rax
+       mov      edi, ebx
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       int3     
+						;; size=38 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFFFFFFFFFFh, 7FFFFFFFFFFFFFFFh
+RWD16  	dq	4341C37937E08000h	;        1e+16
+RWD24  	dd	G_M1831_IG05 - G_M1831_IG02
+       	dd	G_M1831_IG04 - G_M1831_IG02
+       	dd	G_M1831_IG06 - G_M1831_IG02
+       	dd	G_M1831_IG07 - G_M1831_IG02
+       	dd	G_M1831_IG08 - G_M1831_IG02
+RWD44  	dd	00000000h
+RWD48  	dq	8000000000000000h, 8000000000000000h
+RWD64  	dq	3FDFFFFFFFFFFFFFh, 3FDFFFFFFFFFFFFFh
 
-; Total bytes of code 16, prolog size 3, PerfScore 3.25, instruction count 3, allocated bytes for code 16 (MethodHash=71bef8d8) for method System.Double:Round(double,int,int):double (FullOpts)
+
+; Total bytes of code 265, prolog size 11, PerfScore 56.08, instruction count 61, allocated bytes for code 265 (MethodHash=71bef8d8) for method System.Double:Round(double,int,int):double (FullOpts)

249 (1,556.25 % of base) - System.Single:Round(float,int,int):float

 ; Assembly listing for method System.Single:Round(float,int,int):float (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
-; fully interruptible
+; rbp based frame
+; partially interruptible
 ; No PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T02] (  3,  3   )   float  ->  mm0         single-def
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
-;  V02 arg2         [V02,T01] (  3,  3   )     int  ->  rsi         single-def
+;  V00 arg0         [V00,T04] (  4,  3.50)   float  ->  mm0         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
+;  V02 arg2         [V02,T01] (  5,  3   )     int  ->  rbx         single-def
 ;# V03 OutArgs      [V03    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
+;  V04 tmp1         [V04,T03] (  4,  7   )   float  ->  mm1         "Inlining Arg"
+;* V05 tmp2         [V05    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[float]>
+;  V06 tmp3         [V06,T07] (  3,  1.50)   float  ->  mm2         "Inline stloc first use temp"
+;* V07 tmp4         [V07    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
+;  V08 tmp5         [V08,T05] (  6,  3   )   float  ->  mm3         "Inline return value spill temp"
+;  V09 tmp6         [V09,T02] (  7,  7   )   float  ->  mm3         "Inlining Arg"
+;* V10 tmp7         [V10    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
+;* V11 tmp8         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V05._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp9         [V12    ] (  0,  0   )     int  ->  zero-ref    "field V05._length (fldOffset=0x8)" P-INDEP
+;* V13 tmp10        [V13    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V14 tmp11        [V14    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
+;  V15 tmp12        [V15,T08] (  2,  0   )     ref  ->  rsi         single-def "argument with side effect"
+;  V16 rat0         [V16,T06] (  3,  3   )  simd16  ->  mm0         "ReplaceWithLclVar is creating a new local variable"
 ;
-; Lcl frame size = 0
+; Lcl frame size = 8
 
 G_M2280_IG01:
+       push     rbp
+       push     rbx
+       push     rax
        vzeroupper 
-						;; size=3 bbWeight=1 PerfScore 1.00
+       lea      rbp, [rsp+0x10]
+       mov      ebx, esi
+						;; size=13 bbWeight=1 PerfScore 4.75
 G_M2280_IG02:
-       mov      rax, 0xD1FFAB1E      ; code for System.MathF:Round(float,int,int):float
-						;; size=10 bbWeight=1 PerfScore 0.25
+       vmovaps  xmm1, xmm0
+       cmp      edi, 6
+       ja       G_M2280_IG12
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovss   xmm3, dword ptr [reloc @RWD16]
+       vucomiss xmm3, xmm2
+       jbe      G_M2280_IG10
+						;; size=39 bbWeight=1 PerfScore 9.50
 G_M2280_IG03:
-       tail.jmp [rax]System.MathF:Round(float,int,int):float
-						;; size=3 bbWeight=1 PerfScore 2.00
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovss   xmm2, dword ptr [rsi+4*rdi]
+       vmulss   xmm3, xmm0, xmm2
+       cmp      ebx, 4
+       ja       G_M2280_IG13
+       mov      edi, ebx
+       lea      rsi, [reloc @RWD20]
+       mov      esi, dword ptr [rsi+4*rdi]
+       lea      rax, G_M2280_IG02
+       add      rsi, rax
+       jmp      rsi
+						;; size=54 bbWeight=0.50 PerfScore 7.38
+G_M2280_IG04:
+       vmovups  xmm0, xmmword ptr [reloc @RWD48]
+       vmovaps  xmm1, xmm3
+       vandps   xmm1, xmm1, xmm0
+       vandnps  xmm0, xmm0, xmmword ptr [reloc @RWD64]
+       vorps    xmm0, xmm0, xmm1
+       vaddss   xmm3, xmm0, xmm3
+       vroundss xmm3, xmm3, xmm3, 11
+       jmp      SHORT G_M2280_IG09
+						;; size=40 bbWeight=0.50 PerfScore 8.96
+G_M2280_IG05:
+       vroundss xmm3, xmm3, xmm3, 4
+       jmp      SHORT G_M2280_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M2280_IG06:
+       vroundss xmm3, xmm3, xmm3, 11
+       jmp      SHORT G_M2280_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M2280_IG07:
+       vroundss xmm3, xmm3, xmm3, 9
+       jmp      SHORT G_M2280_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M2280_IG08:
+       vroundss xmm3, xmm3, xmm3, 10
+						;; size=6 bbWeight=0.50 PerfScore 3.50
+G_M2280_IG09:
+       vdivss   xmm1, xmm3, xmm2
+						;; size=4 bbWeight=0.50 PerfScore 5.00
+G_M2280_IG10:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M2280_IG11:
+       add      rsp, 8
+       pop      rbx
+       pop      rbp
+       ret      
+						;; size=7 bbWeight=1 PerfScore 2.25
+G_M2280_IG12:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+G_M2280_IG13:
+       mov      edi, 0x45B
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rsi, rax
+       mov      edi, ebx
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       int3     
+						;; size=38 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFF7FFFFFFFh, 7FFFFFFF7FFFFFFFh
+RWD16  	dd	4CBEBC20h		;     1e+08
+RWD20  	dd	G_M2280_IG05 - G_M2280_IG02
+       	dd	G_M2280_IG04 - G_M2280_IG02
+       	dd	G_M2280_IG06 - G_M2280_IG02
+       	dd	G_M2280_IG07 - G_M2280_IG02
+       	dd	G_M2280_IG08 - G_M2280_IG02
+RWD40  	dd	00000000h, 00000000h
+RWD48  	dq	8000000080000000h, 8000000080000000h
+RWD64  	dq	3EFFFFFF3EFFFFFFh, 3EFFFFFF3EFFFFFFh
 
-; Total bytes of code 16, prolog size 3, PerfScore 3.25, instruction count 3, allocated bytes for code 16 (MethodHash=8be6f717) for method System.Single:Round(float,int,int):float (FullOpts)
+
+; Total bytes of code 265, prolog size 11, PerfScore 55.08, instruction count 61, allocated bytes for code 265 (MethodHash=8be6f717) for method System.Single:Round(float,int,int):float (FullOpts)

243 (1,104.55 % of base) - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat

 ; Assembly listing for method System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
+; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 2 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 3 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;* V00 arg0         [V00    ] (  0,  0   )  struct ( 8) zero-ref    single-def <System.Runtime.InteropServices.NFloat>
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
-;  V02 arg2         [V02,T01] (  3,  3   )     int  ->  rsi         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
+;  V02 arg2         [V02,T01] (  5,  3   )     int  ->  rbx         single-def
 ;# V03 OutArgs      [V03    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V04 tmp1         [V04    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op "NewObj constructor temp" <System.Runtime.InteropServices.NFloat>
 ;* V05 tmp2         [V05    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
-;* V06 tmp3         [V06    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
-;  V07 tmp4         [V07,T02] (  2,  2   )  double  ->  mm0         single-def "field V00._value (fldOffset=0x0)" P-INDEP
-;  V08 tmp5         [V08,T03] (  2,  2   )  double  ->  mm0         "field V04._value (fldOffset=0x0)" P-INDEP
+;  V06 tmp3         [V06,T03] (  4,  7   )  double  ->  mm1         "Inlining Arg"
+;* V07 tmp4         [V07    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[double]>
+;  V08 tmp5         [V08,T07] (  3,  1.50)  double  ->  mm2         "Inline stloc first use temp"
+;* V09 tmp6         [V09    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
+;  V10 tmp7         [V10,T05] (  6,  3   )  double  ->  mm3         "Inline return value spill temp"
+;  V11 tmp8         [V11,T02] (  7,  7   )  double  ->  mm3         "Inlining Arg"
+;* V12 tmp9         [V12    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
+;  V13 tmp10        [V13,T04] (  3,  2.50)  double  ->  mm0         single-def "field V00._value (fldOffset=0x0)" P-INDEP
+;* V14 tmp11        [V14    ] (  0,  0   )  double  ->  zero-ref    "field V04._value (fldOffset=0x0)" P-INDEP
+;* V15 tmp12        [V15    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V16 tmp13        [V16    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
+;* V17 tmp14        [V17    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V09._reference (fldOffset=0x0)" P-INDEP
+;* V18 tmp15        [V18    ] (  0,  0   )     int  ->  zero-ref    "field V09._length (fldOffset=0x8)" P-INDEP
+;  V19 tmp16        [V19,T08] (  2,  0   )     ref  ->  rsi         single-def "argument with side effect"
+;  V20 rat0         [V20,T06] (  3,  3   )  simd16  ->  mm0         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 8
 
 G_M51205_IG01:
+       push     rbp
+       push     rbx
        push     rax
        vzeroupper 
-						;; size=4 bbWeight=1 PerfScore 2.00
+       lea      rbp, [rsp+0x10]
+       mov      ebx, esi
+						;; size=13 bbWeight=1 PerfScore 4.75
 G_M51205_IG02:
-       mov      rax, 0xD1FFAB1E      ; code for System.Math:Round(double,int,int):double
-       call     [rax]System.Math:Round(double,int,int):double
-       nop      
-						;; size=13 bbWeight=1 PerfScore 3.50
+       vmovaps  xmm1, xmm0
+       cmp      edi, 15
+       ja       G_M51205_IG12
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovsd   xmm3, qword ptr [reloc @RWD16]
+       vucomisd xmm3, xmm2
+       jbe      G_M51205_IG10
+						;; size=39 bbWeight=1 PerfScore 9.50
 G_M51205_IG03:
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovsd   xmm2, qword ptr [rsi+8*rdi]
+       vmulsd   xmm3, xmm0, xmm2
+       cmp      ebx, 4
+       ja       G_M51205_IG13
+       mov      edi, ebx
+       lea      rsi, [reloc @RWD24]
+       mov      esi, dword ptr [rsi+4*rdi]
+       lea      rax, G_M51205_IG02
+       add      rsi, rax
+       jmp      rsi
+						;; size=54 bbWeight=0.50 PerfScore 7.38
+G_M51205_IG04:
+       vmovups  xmm0, xmmword ptr [reloc @RWD48]
+       vmovaps  xmm1, xmm3
+       vandpd   xmm1, xmm1, xmm0
+       vandnpd  xmm0, xmm0, xmmword ptr [reloc @RWD64]
+       vorpd    xmm0, xmm0, xmm1
+       vaddsd   xmm3, xmm0, xmm3
+       vroundsd xmm3, xmm3, xmm3, 11
+       jmp      SHORT G_M51205_IG09
+						;; size=40 bbWeight=0.50 PerfScore 8.96
+G_M51205_IG05:
+       vroundsd xmm3, xmm3, xmm3, 4
+       jmp      SHORT G_M51205_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M51205_IG06:
+       vroundsd xmm3, xmm3, xmm3, 11
+       jmp      SHORT G_M51205_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M51205_IG07:
+       vroundsd xmm3, xmm3, xmm3, 9
+       jmp      SHORT G_M51205_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M51205_IG08:
+       vroundsd xmm3, xmm3, xmm3, 10
+						;; size=6 bbWeight=0.50 PerfScore 3.50
+G_M51205_IG09:
+       vdivsd   xmm1, xmm3, xmm2
+						;; size=4 bbWeight=0.50 PerfScore 6.00
+G_M51205_IG10:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M51205_IG11:
        add      rsp, 8
+       pop      rbx
+       pop      rbp
        ret      
-						;; size=5 bbWeight=1 PerfScore 1.25
+						;; size=7 bbWeight=1 PerfScore 2.25
+G_M51205_IG12:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+G_M51205_IG13:
+       mov      edi, 0x45B
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rsi, rax
+       mov      edi, ebx
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       int3     
+						;; size=38 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFFFFFFFFFFh, 7FFFFFFFFFFFFFFFh
+RWD16  	dq	4341C37937E08000h	;        1e+16
+RWD24  	dd	G_M51205_IG05 - G_M51205_IG02
+       	dd	G_M51205_IG04 - G_M51205_IG02
+       	dd	G_M51205_IG06 - G_M51205_IG02
+       	dd	G_M51205_IG07 - G_M51205_IG02
+       	dd	G_M51205_IG08 - G_M51205_IG02
+RWD44  	dd	00000000h
+RWD48  	dq	8000000000000000h, 8000000000000000h
+RWD64  	dq	3FDFFFFFFFFFFFFFh, 3FDFFFFFFFFFFFFFh
 
-; Total bytes of code 22, prolog size 4, PerfScore 6.75, instruction count 7, allocated bytes for code 22 (MethodHash=563d37fa) for method System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)
+
+; Total bytes of code 265, prolog size 11, PerfScore 56.08, instruction count 61, allocated bytes for code 265 (MethodHash=563d37fa) for method System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int,int):System.Runtime.InteropServices.NFloat (FullOpts)

230 (605.26 % of base) - System.Double:Round(double,int):double

 ; Assembly listing for method System.Double:Round(double,int):double (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
-; fully interruptible
+; rbp based frame
+; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 1 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 2 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T01] (  3,  3   )  double  ->  mm0         single-def
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
+;  V00 arg0         [V00,T02] (  4,  3.50)  double  ->  mm0         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
+;  V03 tmp1         [V03,T01] (  4,  7   )  double  ->  mm1         "Inlining Arg"
+;* V04 tmp2         [V04    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[double]>
+;  V05 tmp3         [V05,T03] (  3,  1.50)  double  ->  mm1         "Inline stloc first use temp"
+;* V06 tmp4         [V06    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
+;* V07 tmp5         [V07    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
+;* V08 tmp6         [V08    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
+;* V09 tmp7         [V09    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
+;* V11 tmp9         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V06._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp10        [V12    ] (  0,  0   )     int  ->  zero-ref    "field V06._length (fldOffset=0x8)" P-INDEP
 ;
 ; Lcl frame size = 0
 
 G_M31928_IG01:
+       push     rbp
        vzeroupper 
-						;; size=3 bbWeight=1 PerfScore 1.00
+       mov      rbp, rsp
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M31928_IG02:
-       xor      esi, esi
-       mov      rax, 0xD1FFAB1E      ; code for System.Math:Round(double,int,int):double
-						;; size=12 bbWeight=1 PerfScore 0.50
+       vmovaps  xmm1, xmm0
+       cmp      edi, 15
+       ja       SHORT G_M31928_IG06
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovsd   xmm3, qword ptr [reloc @RWD16]
+       vucomisd xmm3, xmm2
+       jbe      SHORT G_M31928_IG04
+						;; size=31 bbWeight=1 PerfScore 9.50
 G_M31928_IG03:
-       tail.jmp [rax]System.Math:Round(double,int,int):double
-						;; size=3 bbWeight=1 PerfScore 2.00
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovsd   xmm1, qword ptr [rsi+8*rdi]
+       vmulsd   xmm0, xmm0, xmm1
+       vroundsd xmm0, xmm0, xmm0, 4
+       vdivsd   xmm1, xmm0, xmm1
+						;; size=31 bbWeight=0.50 PerfScore 13.25
+G_M31928_IG04:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M31928_IG05:
+       pop      rbp
+       ret      
+						;; size=2 bbWeight=1 PerfScore 1.50
+G_M31928_IG06:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFFFFFFFFFFh, 7FFFFFFFFFFFFFFFh
+RWD16  	dq	4341C37937E08000h	;        1e+16
 
-; Total bytes of code 18, prolog size 3, PerfScore 3.50, instruction count 4, allocated bytes for code 18 (MethodHash=1cf38347) for method System.Double:Round(double,int):double (FullOpts)
+
+; Total bytes of code 111, prolog size 7, PerfScore 26.75, instruction count 26, allocated bytes for code 111 (MethodHash=1cf38347) for method System.Double:Round(double,int):double (FullOpts)

230 (605.26 % of base) - System.Math:Round(double,int):double

 ; Assembly listing for method System.Math:Round(double,int):double (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
-; fully interruptible
+; rbp based frame
+; partially interruptible
 ; No PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T01] (  3,  3   )  double  ->  mm0         single-def
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
+;  V00 arg0         [V00,T02] (  4,  3.50)  double  ->  mm0         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
+;  V03 tmp1         [V03,T01] (  4,  7   )  double  ->  mm1         "Inlining Arg"
+;* V04 tmp2         [V04    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[double]>
+;  V05 tmp3         [V05,T03] (  3,  1.50)  double  ->  mm1         "Inline stloc first use temp"
+;* V06 tmp4         [V06    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
+;* V07 tmp5         [V07    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
+;* V08 tmp6         [V08    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
+;* V09 tmp7         [V09    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
+;* V11 tmp9         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V06._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp10        [V12    ] (  0,  0   )     int  ->  zero-ref    "field V06._length (fldOffset=0x8)" P-INDEP
 ;
 ; Lcl frame size = 0
 
 G_M5597_IG01:
+       push     rbp
        vzeroupper 
-						;; size=3 bbWeight=1 PerfScore 1.00
+       mov      rbp, rsp
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M5597_IG02:
-       xor      esi, esi
-       mov      rax, 0xD1FFAB1E      ; code for System.Math:Round(double,int,int):double
-						;; size=12 bbWeight=1 PerfScore 0.50
+       vmovaps  xmm1, xmm0
+       cmp      edi, 15
+       ja       SHORT G_M5597_IG06
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovsd   xmm3, qword ptr [reloc @RWD16]
+       vucomisd xmm3, xmm2
+       jbe      SHORT G_M5597_IG04
+						;; size=31 bbWeight=1 PerfScore 9.50
 G_M5597_IG03:
-       tail.jmp [rax]System.Math:Round(double,int,int):double
-						;; size=3 bbWeight=1 PerfScore 2.00
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovsd   xmm1, qword ptr [rsi+8*rdi]
+       vmulsd   xmm0, xmm0, xmm1
+       vroundsd xmm0, xmm0, xmm0, 4
+       vdivsd   xmm1, xmm0, xmm1
+						;; size=31 bbWeight=0.50 PerfScore 13.25
+G_M5597_IG04:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M5597_IG05:
+       pop      rbp
+       ret      
+						;; size=2 bbWeight=1 PerfScore 1.50
+G_M5597_IG06:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFFFFFFFFFFh, 7FFFFFFFFFFFFFFFh
+RWD16  	dq	4341C37937E08000h	;        1e+16
 
-; Total bytes of code 18, prolog size 3, PerfScore 3.50, instruction count 4, allocated bytes for code 18 (MethodHash=21bbea22) for method System.Math:Round(double,int):double (FullOpts)
+
+; Total bytes of code 111, prolog size 7, PerfScore 26.75, instruction count 26, allocated bytes for code 111 (MethodHash=21bbea22) for method System.Math:Round(double,int):double (FullOpts)

230 (605.26 % of base) - System.MathF:Round(float,int):float

 ; Assembly listing for method System.MathF:Round(float,int):float (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
-; fully interruptible
+; rbp based frame
+; partially interruptible
 ; No PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T01] (  3,  3   )   float  ->  mm0         single-def
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
+;  V00 arg0         [V00,T02] (  4,  3.50)   float  ->  mm0         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
+;  V03 tmp1         [V03,T01] (  4,  7   )   float  ->  mm1         "Inlining Arg"
+;* V04 tmp2         [V04    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[float]>
+;  V05 tmp3         [V05,T03] (  3,  1.50)   float  ->  mm1         "Inline stloc first use temp"
+;* V06 tmp4         [V06    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
+;* V07 tmp5         [V07    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
+;* V08 tmp6         [V08    ] (  0,  0   )   float  ->  zero-ref    "Inlining Arg"
+;* V09 tmp7         [V09    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
+;* V11 tmp9         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V06._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp10        [V12    ] (  0,  0   )     int  ->  zero-ref    "field V06._length (fldOffset=0x8)" P-INDEP
 ;
 ; Lcl frame size = 0
 
 G_M49307_IG01:
+       push     rbp
        vzeroupper 
-						;; size=3 bbWeight=1 PerfScore 1.00
+       mov      rbp, rsp
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M49307_IG02:
-       xor      esi, esi
-       mov      rax, 0xD1FFAB1E      ; code for System.MathF:Round(float,int,int):float
-						;; size=12 bbWeight=1 PerfScore 0.50
+       vmovaps  xmm1, xmm0
+       cmp      edi, 6
+       ja       SHORT G_M49307_IG06
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovss   xmm3, dword ptr [reloc @RWD16]
+       vucomiss xmm3, xmm2
+       jbe      SHORT G_M49307_IG04
+						;; size=31 bbWeight=1 PerfScore 9.50
 G_M49307_IG03:
-       tail.jmp [rax]System.MathF:Round(float,int,int):float
-						;; size=3 bbWeight=1 PerfScore 2.00
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovss   xmm1, dword ptr [rsi+4*rdi]
+       vmulss   xmm0, xmm0, xmm1
+       vroundss xmm0, xmm0, xmm0, 4
+       vdivss   xmm1, xmm0, xmm1
+						;; size=31 bbWeight=0.50 PerfScore 12.25
+G_M49307_IG04:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M49307_IG05:
+       pop      rbp
+       ret      
+						;; size=2 bbWeight=1 PerfScore 1.50
+G_M49307_IG06:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFF7FFFFFFFh, 7FFFFFFF7FFFFFFFh
+RWD16  	dd	4CBEBC20h		;     1e+08
 
-; Total bytes of code 18, prolog size 3, PerfScore 3.50, instruction count 4, allocated bytes for code 18 (MethodHash=37b13f64) for method System.MathF:Round(float,int):float (FullOpts)
+
+; Total bytes of code 111, prolog size 7, PerfScore 25.75, instruction count 26, allocated bytes for code 111 (MethodHash=37b13f64) for method System.MathF:Round(float,int):float (FullOpts)

230 (605.26 % of base) - System.Single:Round(float,int):float

 ; Assembly listing for method System.Single:Round(float,int):float (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
-; fully interruptible
+; rbp based frame
+; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 1 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 2 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T01] (  3,  3   )   float  ->  mm0         single-def
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
+;  V00 arg0         [V00,T02] (  4,  3.50)   float  ->  mm0         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
+;  V03 tmp1         [V03,T01] (  4,  7   )   float  ->  mm1         "Inlining Arg"
+;* V04 tmp2         [V04    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[float]>
+;  V05 tmp3         [V05,T03] (  3,  1.50)   float  ->  mm1         "Inline stloc first use temp"
+;* V06 tmp4         [V06    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
+;* V07 tmp5         [V07    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
+;* V08 tmp6         [V08    ] (  0,  0   )   float  ->  zero-ref    "Inlining Arg"
+;* V09 tmp7         [V09    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
+;* V10 tmp8         [V10    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
+;* V11 tmp9         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V06._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp10        [V12    ] (  0,  0   )     int  ->  zero-ref    "field V06._length (fldOffset=0x8)" P-INDEP
 ;
 ; Lcl frame size = 0
 
 G_M33559_IG01:
+       push     rbp
        vzeroupper 
-						;; size=3 bbWeight=1 PerfScore 1.00
+       mov      rbp, rsp
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M33559_IG02:
-       xor      esi, esi
-       mov      rax, 0xD1FFAB1E      ; code for System.MathF:Round(float,int,int):float
-						;; size=12 bbWeight=1 PerfScore 0.50
+       vmovaps  xmm1, xmm0
+       cmp      edi, 6
+       ja       SHORT G_M33559_IG06
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovss   xmm3, dword ptr [reloc @RWD16]
+       vucomiss xmm3, xmm2
+       jbe      SHORT G_M33559_IG04
+						;; size=31 bbWeight=1 PerfScore 9.50
 G_M33559_IG03:
-       tail.jmp [rax]System.MathF:Round(float,int,int):float
-						;; size=3 bbWeight=1 PerfScore 2.00
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovss   xmm1, dword ptr [rsi+4*rdi]
+       vmulss   xmm0, xmm0, xmm1
+       vroundss xmm0, xmm0, xmm0, 4
+       vdivss   xmm1, xmm0, xmm1
+						;; size=31 bbWeight=0.50 PerfScore 12.25
+G_M33559_IG04:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M33559_IG05:
+       pop      rbp
+       ret      
+						;; size=2 bbWeight=1 PerfScore 1.50
+G_M33559_IG06:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFF7FFFFFFFh, 7FFFFFFF7FFFFFFFh
+RWD16  	dd	4CBEBC20h		;     1e+08
 
-; Total bytes of code 18, prolog size 3, PerfScore 3.50, instruction count 4, allocated bytes for code 18 (MethodHash=60aa7ce8) for method System.Single:Round(float,int):float (FullOpts)
+
+; Total bytes of code 111, prolog size 7, PerfScore 25.75, instruction count 26, allocated bytes for code 111 (MethodHash=60aa7ce8) for method System.Single:Round(float,int):float (FullOpts)

224 (355.56 % of base) - System.Half:Round(System.Half,int,int):System.Half

 ; Assembly listing for method System.Half:Round(System.Half,int,int):System.Half (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 3 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;* V00 arg0         [V00    ] (  0,  0   )  struct ( 8) zero-ref    single-def <System.Half>
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rbx         single-def
-;  V02 arg2         [V02,T01] (  3,  3   )     int  ->  r15         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rbx         single-def
+;  V02 arg2         [V02,T01] (  5,  3   )     int  ->  r15         single-def
 ;# V03 OutArgs      [V03    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
-;  V04 tmp1         [V04,T02] (  2,  2   )  ushort  ->  rdi         single-def "field V00._value (fldOffset=0x0)" P-INDEP
-;  V05 tmp2         [V05,T03] (  2,  4   )   float  ->  mm0         "argument with side effect"
-;  V06 tmp3         [V06,T04] (  2,  4   )   float  ->  mm0         "argument with side effect"
+;  V04 tmp1         [V04,T03] (  5,  8   )   float  ->  mm0         "Inlining Arg"
+;* V05 tmp2         [V05    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[float]>
+;  V06 tmp3         [V06,T07] (  3,  1.50)   float  ->  mm1         "Inline stloc first use temp"
+;* V07 tmp4         [V07    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
+;  V08 tmp5         [V08,T05] (  6,  3   )   float  ->  mm0         "Inline return value spill temp"
+;  V09 tmp6         [V09,T04] (  7,  7   )   float  ->  mm0         "Inlining Arg"
+;* V10 tmp7         [V10    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
+;  V11 tmp8         [V11,T02] (  2,  2   )  ushort  ->  rdi         single-def "field V00._value (fldOffset=0x0)" P-INDEP
+;* V12 tmp9         [V12    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V05._reference (fldOffset=0x0)" P-INDEP
+;* V13 tmp10        [V13    ] (  0,  0   )     int  ->  zero-ref    "field V05._length (fldOffset=0x8)" P-INDEP
+;* V14 tmp11        [V14    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V15 tmp12        [V15    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
+;  V16 tmp13        [V16,T08] (  2,  0   )     ref  ->  rsi         single-def "argument with side effect"
+;  V17 rat0         [V17,T06] (  3,  3   )  simd16  ->  mm2         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 0
 
 G_M5297_IG01:
        push     rbp
        push     r15
        push     rbx
        vzeroupper 
        lea      rbp, [rsp+0x10]
        mov      ebx, esi
        mov      r15d, edx
 						;; size=17 bbWeight=1 PerfScore 5.00
 G_M5297_IG02:
        mov      rax, 0xD1FFAB1E      ; code for System.Half:op_Explicit(System.Half):float
        call     [rax]System.Half:op_Explicit(System.Half):float
-       mov      edi, ebx
-       mov      esi, r15d
-       mov      rax, 0xD1FFAB1E      ; code for System.MathF:Round(float,int,int):float
-       call     [rax]System.MathF:Round(float,int,int):float
-       mov      rax, 0xD1FFAB1E      ; code for System.Half:op_Explicit(float):System.Half
-						;; size=39 bbWeight=1 PerfScore 7.25
+       cmp      ebx, 6
+       ja       G_M5297_IG12
+       vandps   xmm1, xmm0, xmmword ptr [reloc @RWD00]
+       vmovss   xmm2, dword ptr [reloc @RWD16]
+       vucomiss xmm2, xmm1
+       jbe      G_M5297_IG10
+						;; size=47 bbWeight=1 PerfScore 12.50
 G_M5297_IG03:
+       mov      eax, ebx
+       mov      rcx, 0xD1FFAB1E      ; static handle
+       vmovss   xmm1, dword ptr [rcx+4*rax]
+       vmulss   xmm0, xmm0, xmm1
+       cmp      r15d, 4
+       ja       G_M5297_IG13
+       mov      edi, r15d
+       lea      rsi, [reloc @RWD20]
+       mov      esi, dword ptr [rsi+4*rdi]
+       lea      rax, G_M5297_IG02
+       add      rsi, rax
+       jmp      rsi
+						;; size=56 bbWeight=0.50 PerfScore 7.38
+G_M5297_IG04:
+       vmovups  xmm2, xmmword ptr [reloc @RWD48]
+       vmovaps  xmm3, xmm0
+       vandps   xmm3, xmm3, xmm2
+       vandnps  xmm2, xmm2, xmmword ptr [reloc @RWD64]
+       vorps    xmm2, xmm2, xmm3
+       vaddss   xmm0, xmm2, xmm0
+       vroundss xmm0, xmm0, xmm0, 11
+       jmp      SHORT G_M5297_IG09
+						;; size=40 bbWeight=0.50 PerfScore 8.96
+G_M5297_IG05:
+       vroundss xmm0, xmm0, xmm0, 4
+       jmp      SHORT G_M5297_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M5297_IG06:
+       vroundss xmm0, xmm0, xmm0, 11
+       jmp      SHORT G_M5297_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M5297_IG07:
+       vroundss xmm0, xmm0, xmm0, 9
+       jmp      SHORT G_M5297_IG09
+						;; size=8 bbWeight=0.50 PerfScore 4.50
+G_M5297_IG08:
+       vroundss xmm0, xmm0, xmm0, 10
+						;; size=6 bbWeight=0.50 PerfScore 3.50
+G_M5297_IG09:
+       vdivss   xmm0, xmm0, xmm1
+						;; size=4 bbWeight=0.50 PerfScore 5.00
+G_M5297_IG10:
+       mov      rax, 0xD1FFAB1E      ; code for System.Half:op_Explicit(float):System.Half
+       call     [rax]System.Half:op_Explicit(float):System.Half
+       nop      
+						;; size=13 bbWeight=1 PerfScore 3.50
+G_M5297_IG11:
        pop      rbx
        pop      r15
        pop      rbp
-       tail.jmp [rax]System.Half:op_Explicit(float):System.Half
-						;; size=7 bbWeight=1 PerfScore 3.50
+       ret      
+						;; size=5 bbWeight=1 PerfScore 2.50
+G_M5297_IG12:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+G_M5297_IG13:
+       mov      edi, 0x45B
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rsi, rax
+       mov      edi, r15d
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       int3     
+						;; size=39 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFF7FFFFFFFh, 7FFFFFFF7FFFFFFFh
+RWD16  	dd	4CBEBC20h		;     1e+08
+RWD20  	dd	G_M5297_IG05 - G_M5297_IG02
+       	dd	G_M5297_IG04 - G_M5297_IG02
+       	dd	G_M5297_IG06 - G_M5297_IG02
+       	dd	G_M5297_IG07 - G_M5297_IG02
+       	dd	G_M5297_IG08 - G_M5297_IG02
+RWD40  	dd	00000000h, 00000000h
+RWD48  	dq	8000000080000000h, 8000000080000000h
+RWD64  	dq	3EFFFFFF3EFFFFFFh, 3EFFFFFF3EFFFFFFh
+
 
-; Total bytes of code 63, prolog size 12, PerfScore 15.75, instruction count 18, allocated bytes for code 63 (MethodHash=63b0eb4e) for method System.Half:Round(System.Half,int,int):System.Half (FullOpts)
+; Total bytes of code 287, prolog size 12, PerfScore 61.83, instruction count 65, allocated bytes for code 287 (MethodHash=63b0eb4e) for method System.Half:Round(System.Half,int,int):System.Half (FullOpts)

218 (436.00 % of base) - System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat

 ; Assembly listing for method System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
-; rsp based frame
+; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 3 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 4 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;* V00 arg0         [V00    ] (  0,  0   )  struct ( 8) zero-ref    single-def <System.Runtime.InteropServices.NFloat>
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rdi         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )  struct ( 8) zero-ref    ld-addr-op "NewObj constructor temp" <System.Runtime.InteropServices.NFloat>
 ;* V04 tmp2         [V04    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
 ;* V05 tmp3         [V05    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
-;* V06 tmp4         [V06    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
-;  V07 tmp5         [V07,T01] (  2,  2   )  double  ->  mm0         single-def "field V00._value (fldOffset=0x0)" P-INDEP
-;  V08 tmp6         [V08,T02] (  2,  2   )  double  ->  mm0         "field V03._value (fldOffset=0x0)" P-INDEP
+;  V06 tmp4         [V06,T01] (  4,  7   )  double  ->  mm1         "Inlining Arg"
+;* V07 tmp5         [V07    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[double]>
+;  V08 tmp6         [V08,T03] (  3,  1.50)  double  ->  mm1         "Inline stloc first use temp"
+;* V09 tmp7         [V09    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
+;* V10 tmp8         [V10    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
+;* V11 tmp9         [V11    ] (  0,  0   )  double  ->  zero-ref    "Inlining Arg"
+;  V12 tmp10        [V12,T02] (  3,  2.50)  double  ->  mm0         single-def "field V00._value (fldOffset=0x0)" P-INDEP
+;* V13 tmp11        [V13    ] (  0,  0   )  double  ->  zero-ref    "field V03._value (fldOffset=0x0)" P-INDEP
+;* V14 tmp12        [V14    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V15 tmp13        [V15    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
+;* V16 tmp14        [V16    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V09._reference (fldOffset=0x0)" P-INDEP
+;* V17 tmp15        [V17    ] (  0,  0   )     int  ->  zero-ref    "field V09._length (fldOffset=0x8)" P-INDEP
 ;
-; Lcl frame size = 8
+; Lcl frame size = 0
 
 G_M48442_IG01:
-       push     rax
+       push     rbp
        vzeroupper 
-						;; size=4 bbWeight=1 PerfScore 2.00
+       mov      rbp, rsp
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M48442_IG02:
-       xor      esi, esi
-       mov      rax, 0xD1FFAB1E      ; code for System.Math:Round(double,int,int):double
-       call     [rax]System.Math:Round(double,int,int):double
-       nop      
-						;; size=15 bbWeight=1 PerfScore 3.75
+       vmovaps  xmm1, xmm0
+       cmp      edi, 15
+       ja       SHORT G_M48442_IG06
+       vandps   xmm2, xmm1, xmmword ptr [reloc @RWD00]
+       vmovsd   xmm3, qword ptr [reloc @RWD16]
+       vucomisd xmm3, xmm2
+       jbe      SHORT G_M48442_IG04
+						;; size=31 bbWeight=1 PerfScore 9.50
 G_M48442_IG03:
-       add      rsp, 8
+       mov      edi, edi
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovsd   xmm1, qword ptr [rsi+8*rdi]
+       vmulsd   xmm0, xmm0, xmm1
+       vroundsd xmm0, xmm0, xmm0, 4
+       vdivsd   xmm1, xmm0, xmm1
+						;; size=31 bbWeight=0.50 PerfScore 13.25
+G_M48442_IG04:
+       vmovaps  xmm0, xmm1
+						;; size=4 bbWeight=1 PerfScore 0.25
+G_M48442_IG05:
+       pop      rbp
        ret      
-						;; size=5 bbWeight=1 PerfScore 1.25
+						;; size=2 bbWeight=1 PerfScore 1.50
+G_M48442_IG06:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFFFFFFFFFFh, 7FFFFFFFFFFFFFFFh
+RWD16  	dq	4341C37937E08000h	;        1e+16
 
-; Total bytes of code 24, prolog size 4, PerfScore 7.00, instruction count 8, allocated bytes for code 24 (MethodHash=78a642c5) for method System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts)
+
+; Total bytes of code 111, prolog size 7, PerfScore 26.75, instruction count 26, allocated bytes for code 111 (MethodHash=78a642c5) for method System.Runtime.InteropServices.NFloat:Round(System.Runtime.InteropServices.NFloat,int):System.Runtime.InteropServices.NFloat (FullOpts)

200 (166.67 % of base) - System.Half:Round(System.Half,int):System.Half

 ; Assembly listing for method System.Half:Round(System.Half,int):System.Half (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 1 single block inlinees; 0 inlinees without PGO data
+; 0 inlinees with PGO data; 2 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
 ;* V00 arg0         [V00    ] (  0,  0   )  struct ( 8) zero-ref    single-def <System.Half>
-;  V01 arg1         [V01,T00] (  3,  3   )     int  ->  rbx         single-def
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rbx         single-def
 ;# V02 OutArgs      [V02    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
 ;* V03 tmp1         [V03    ] (  0,  0   )   float  ->  zero-ref    "Inlining Arg"
-;  V04 tmp2         [V04,T01] (  2,  2   )  ushort  ->  rdi         single-def "field V00._value (fldOffset=0x0)" P-INDEP
-;  V05 tmp3         [V05,T02] (  2,  4   )   float  ->  mm0         "argument with side effect"
-;  V06 tmp4         [V06,T03] (  2,  4   )   float  ->  mm0         "argument with side effect"
+;  V04 tmp2         [V04,T02] (  5,  8   )   float  ->  mm0         "Inlining Arg"
+;* V05 tmp3         [V05    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op "Inline stloc first use temp" <System.ReadOnlySpan`1[float]>
+;  V06 tmp4         [V06,T03] (  3,  1.50)   float  ->  mm1         "Inline stloc first use temp"
+;* V07 tmp5         [V07    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
+;* V08 tmp6         [V08    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
+;* V09 tmp7         [V09    ] (  0,  0   )   float  ->  zero-ref    "Inlining Arg"
+;  V10 tmp8         [V10,T01] (  2,  2   )  ushort  ->  rdi         single-def "field V00._value (fldOffset=0x0)" P-INDEP
+;* V11 tmp9         [V11    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V05._reference (fldOffset=0x0)" P-INDEP
+;* V12 tmp10        [V12    ] (  0,  0   )     int  ->  zero-ref    "field V05._length (fldOffset=0x8)" P-INDEP
+;* V13 tmp11        [V13    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V07._reference (fldOffset=0x0)" P-INDEP
+;* V14 tmp12        [V14    ] (  0,  0   )     int  ->  zero-ref    "field V07._length (fldOffset=0x8)" P-INDEP
 ;
 ; Lcl frame size = 8
 
 G_M52238_IG01:
        push     rbp
        push     rbx
        push     rax
        vzeroupper 
        lea      rbp, [rsp+0x10]
        mov      ebx, esi
 						;; size=13 bbWeight=1 PerfScore 4.75
 G_M52238_IG02:
        mov      rax, 0xD1FFAB1E      ; code for System.Half:op_Explicit(System.Half):float
        call     [rax]System.Half:op_Explicit(System.Half):float
-       mov      edi, ebx
-       xor      esi, esi
-       mov      rax, 0xD1FFAB1E      ; code for System.MathF:Round(float,int,int):float
-       call     [rax]System.MathF:Round(float,int,int):float
-       mov      rax, 0xD1FFAB1E      ; code for System.Half:op_Explicit(float):System.Half
-						;; size=38 bbWeight=1 PerfScore 7.25
+       cmp      ebx, 6
+       ja       SHORT G_M52238_IG06
+       vandps   xmm1, xmm0, xmmword ptr [reloc @RWD00]
+       vmovss   xmm2, dword ptr [reloc @RWD16]
+       vucomiss xmm2, xmm1
+       jbe      SHORT G_M52238_IG04
+						;; size=39 bbWeight=1 PerfScore 12.50
 G_M52238_IG03:
+       mov      eax, ebx
+       mov      rcx, 0xD1FFAB1E      ; static handle
+       vmovss   xmm1, dword ptr [rcx+4*rax]
+       vmulss   xmm0, xmm0, xmm1
+       vroundss xmm0, xmm0, xmm0, 4
+       vdivss   xmm0, xmm0, xmm1
+						;; size=31 bbWeight=0.50 PerfScore 12.25
+G_M52238_IG04:
+       mov      rax, 0xD1FFAB1E      ; code for System.Half:op_Explicit(float):System.Half
+       call     [rax]System.Half:op_Explicit(float):System.Half
+       nop      
+						;; size=13 bbWeight=1 PerfScore 3.50
+G_M52238_IG05:
        add      rsp, 8
        pop      rbx
        pop      rbp
-       tail.jmp [rax]System.Half:op_Explicit(float):System.Half
-						;; size=9 bbWeight=1 PerfScore 3.25
+       ret      
+						;; size=7 bbWeight=1 PerfScore 2.25
+G_M52238_IG06:
+       mov      edi, 0xB21
+       mov      rsi, 0xD1FFAB1E
+       call     CORINFO_HELP_STRCNS
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
+RWD00  	dq	7FFFFFFF7FFFFFFFh, 7FFFFFFF7FFFFFFFh
+RWD16  	dd	4CBEBC20h		;     1e+08
+
 
-; Total bytes of code 60, prolog size 11, PerfScore 15.25, instruction count 17, allocated bytes for code 60 (MethodHash=7a4a33f1) for method System.Half:Round(System.Half,int):System.Half (FullOpts)
+; Total bytes of code 139, prolog size 11, PerfScore 35.25, instruction count 34, allocated bytes for code 139 (MethodHash=7a4a33f1) for method System.Half:Round(System.Half,int):System.Half (FullOpts)

[MihuBot]

Top method improvements

-322 (-55.61 % of base) - System.Math:Round(double,int,int):double

 ; Assembly listing for method System.Math:Round(double,int,int):double (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 1 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T02] ( 19, 11.50)  double  ->  mm0        
-;  V01 arg1         [V01,T01] (  4,  3.50)     int  ->  rdi         single-def
-;  V02 arg2         [V02,T00] (  7,  4   )     int  ->  rbx         single-def
-;  V03 loc0         [V03,T04] (  3,  1.50)  double  ->  mm1        
+;  V00 arg0         [V00,T03] (  6,  5   )  double  ->  mm0        
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
+;  V02 arg2         [V02,T01] (  5,  3   )     int  ->  rbx         single-def
+;  V03 loc0         [V03,T06] (  3,  1.50)  double  ->  mm1        
 ;* V04 loc1         [V04    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op <System.ReadOnlySpan`1[double]>
 ;# V05 OutArgs      [V05    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
-;  V06 tmp1         [V06,T05] (  3,  0   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.ArgumentOutOfRangeException>
-;  V07 tmp2         [V07,T06] (  3,  0   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.MidpointRounding>
-;  V08 tmp3         [V08,T10] (  2,  0   )     ref  ->  r14         class-hnd exact single-def "impImportAndPushBox" <System.String>
-;  V09 tmp4         [V09,T07] (  3,  0   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.ArgumentException>
-;  V10 tmp5         [V10,T08] (  3,  0   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.MidpointRounding>
-;  V11 tmp6         [V11,T11] (  2,  0   )     ref  ->  r14         class-hnd exact single-def "impImportAndPushBox" <System.String>
-;  V12 tmp7         [V12,T09] (  3,  0   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.ArgumentException>
-;* V13 tmp8         [V13    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
-;* V14 tmp9         [V14    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
-;* V15 tmp10        [V15    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
-;* V16 tmp11        [V16    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
-;* V17 tmp12        [V17    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V13._reference (fldOffset=0x0)" P-INDEP
-;* V18 tmp13        [V18    ] (  0,  0   )     int  ->  zero-ref    "field V13._length (fldOffset=0x8)" P-INDEP
-;  V19 tmp14        [V19,T12] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V20 tmp15        [V20,T13] (  2,  0   )     ref  ->  r15         single-def "argument with side effect"
-;  V21 tmp16        [V21,T14] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V22 tmp17        [V22,T15] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V23 tmp18        [V23,T16] (  2,  0   )     ref  ->  r15         single-def "argument with side effect"
-;  V24 tmp19        [V24,T17] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V25 tmp20        [V25,T18] (  2,  0   )     ref  ->  r15         single-def "argument with side effect"
-;  V26 tmp21        [V26,T19] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V27 rat0         [V27,T03] (  3,  3   )  simd16  ->  mm2         "ReplaceWithLclVar is creating a new local variable"
+;* V06 tmp1         [V06    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[double]>
+;  V07 tmp2         [V07,T04] (  6,  3   )  double  ->  mm2         "Inline return value spill temp"
+;  V08 tmp3         [V08,T02] (  7,  7   )  double  ->  mm2         "Inlining Arg"
+;* V09 tmp4         [V09    ] (  0,  0   )  double  ->  zero-ref    "Inline return value spill temp"
+;* V10 tmp5         [V10    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
+;* V11 tmp6         [V11    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
+;* V12 tmp7         [V12    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V06._reference (fldOffset=0x0)" P-INDEP
+;* V13 tmp8         [V13    ] (  0,  0   )     int  ->  zero-ref    "field V06._length (fldOffset=0x8)" P-INDEP
+;  V14 tmp9         [V14,T07] (  2,  0   )     ref  ->  rsi         single-def "argument with side effect"
+;  V15 rat0         [V15,T05] (  3,  3   )  simd16  ->  mm0         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 8
 
 G_M33858_IG01:
        push     rbp
-       push     r15
-       push     r14
        push     rbx
        push     rax
        vzeroupper 
-       lea      rbp, [rsp+0x20]
+       lea      rbp, [rsp+0x10]
        mov      ebx, esi
-						;; size=17 bbWeight=1 PerfScore 6.75
+						;; size=13 bbWeight=1 PerfScore 4.75
 G_M33858_IG02:
        cmp      edi, 15
        ja       G_M33858_IG11
-       cmp      ebx, 4
-       ja       G_M33858_IG12
        vandps   xmm1, xmm0, xmmword ptr [reloc @RWD00]
        vmovsd   xmm2, qword ptr [reloc @RWD16]
        vucomisd xmm2, xmm1
        jbe      G_M33858_IG10
-						;; size=44 bbWeight=1 PerfScore 10.50
+						;; size=35 bbWeight=1 PerfScore 9.25
 G_M33858_IG03:
        mov      edi, edi
-       mov      rax, 0xD1FFAB1E      ; static handle
-       vmovsd   xmm1, qword ptr [rax+8*rdi]
-       vmulsd   xmm0, xmm0, xmm1
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovsd   xmm1, qword ptr [rsi+8*rdi]
+       vmulsd   xmm2, xmm0, xmm1
        cmp      ebx, 4
-       ja       G_M33858_IG13
+       ja       G_M33858_IG12
        mov      edi, ebx
-       lea      rax, [reloc @RWD24]
-       mov      eax, dword ptr [rax+4*rdi]
-       lea      rcx, G_M33858_IG02
-       add      rax, rcx
-       jmp      rax
+       lea      rsi, [reloc @RWD24]
+       mov      esi, dword ptr [rsi+4*rdi]
+       lea      rax, G_M33858_IG02
+       add      rsi, rax
+       jmp      rsi
 						;; size=54 bbWeight=0.50 PerfScore 7.38
 G_M33858_IG04:
-       vroundsd xmm0, xmm0, xmm0, 4
+       vmovups  xmm0, xmmword ptr [reloc @RWD48]
+       vmovaps  xmm3, xmm2
+       vandpd   xmm3, xmm3, xmm0
+       vandnpd  xmm0, xmm0, xmmword ptr [reloc @RWD64]
+       vorpd    xmm0, xmm0, xmm3
+       vaddsd   xmm2, xmm0, xmm2
+       vroundsd xmm2, xmm2, xmm2, 11
        jmp      SHORT G_M33858_IG09
-						;; size=8 bbWeight=0.50 PerfScore 4.50
+						;; size=40 bbWeight=0.50 PerfScore 8.96
 G_M33858_IG05:
-       vmovups  xmm2, xmmword ptr [reloc @RWD48]
-       vmovaps  xmm3, xmm0
-       vandpd   xmm3, xmm3, xmm2
-       vandnpd  xmm2, xmm2, xmmword ptr [reloc @RWD64]
-       vorpd    xmm2, xmm2, xmm3
-       vaddsd   xmm0, xmm2, xmm0
-       vroundsd xmm0, xmm0, xmm0, 11
+       vroundsd xmm2, xmm2, xmm2, 4
        jmp      SHORT G_M33858_IG09
-						;; size=40 bbWeight=0.50 PerfScore 8.96
+						;; size=8 bbWeight=0.50 PerfScore 4.50
 G_M33858_IG06:
-       vroundsd xmm0, xmm0, xmm0, 11
+       vroundsd xmm2, xmm2, xmm2, 11
        jmp      SHORT G_M33858_IG09
 						;; size=8 bbWeight=0.50 PerfScore 4.50
 G_M33858_IG07:
-       vroundsd xmm0, xmm0, xmm0, 9
+       vroundsd xmm2, xmm2, xmm2, 9
        jmp      SHORT G_M33858_IG09
 						;; size=8 bbWeight=0.50 PerfScore 4.50
 G_M33858_IG08:
-       vroundsd xmm0, xmm0, xmm0, 10
+       vroundsd xmm2, xmm2, xmm2, 10
 						;; size=6 bbWeight=0.50 PerfScore 3.50
 G_M33858_IG09:
-       vdivsd   xmm0, xmm0, xmm1
+       vdivsd   xmm0, xmm2, xmm1
 						;; size=4 bbWeight=0.50 PerfScore 6.00
 G_M33858_IG10:
        add      rsp, 8
        pop      rbx
-       pop      r14
-       pop      r15
        pop      rbp
        ret      
-						;; size=11 bbWeight=1 PerfScore 3.25
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M33858_IG11:
-       mov      rdi, 0xD1FFAB1E      ; System.ArgumentOutOfRangeException
-       call     CORINFO_HELP_NEWSFAST
-       mov      rbx, rax
        mov      edi, 0xB21
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
-       mov      r15, rax
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:get_ArgumentOutOfRange_RoundingDigits():System.String
-       call     [rax]System.SR:get_ArgumentOutOfRange_RoundingDigits():System.String
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ArgumentOutOfRangeException:.ctor(System.String,System.String):this
-       call     [rax]System.ArgumentOutOfRangeException:.ctor(System.String,System.String):this
-       mov      rdi, rbx
-       call     CORINFO_HELP_THROW
-						;; size=82 bbWeight=0 PerfScore 0.00
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
 G_M33858_IG12:
-       mov      rdi, 0xD1FFAB1E      ; System.MidpointRounding
-       call     CORINFO_HELP_NEWSFAST
-       mov      r15, rax
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:get_Argument_InvalidEnumValue():System.String
-       call     [rax]System.SR:get_Argument_InvalidEnumValue():System.String
-       mov      r14, rax
-       mov      dword ptr [r15+0x08], ebx
-       mov      rdi, 0xD1FFAB1E      ; System.ArgumentException
-       call     CORINFO_HELP_NEWSFAST
-       mov      rbx, rax
-       mov      edi, 0x439
-       mov      rsi, 0xD1FFAB1E
-       call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, r14
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
-       call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
-       mov      r15, rax
-       mov      edi, 0x45B
-       mov      rsi, 0xD1FFAB1E
-       call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ArgumentException:.ctor(System.String,System.String):this
-       call     [rax]System.ArgumentException:.ctor(System.String,System.String):this
-       mov      rdi, rbx
-       call     CORINFO_HELP_THROW
-						;; size=148 bbWeight=0 PerfScore 0.00
-G_M33858_IG13:
-       mov      rdi, 0xD1FFAB1E      ; System.MidpointRounding
-       call     CORINFO_HELP_NEWSFAST
-       mov      r15, rax
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:get_Argument_InvalidEnumValue():System.String
-       call     [rax]System.SR:get_Argument_InvalidEnumValue():System.String
-       mov      r14, rax
-       mov      dword ptr [r15+0x08], ebx
-       mov      rdi, 0xD1FFAB1E      ; System.ArgumentException
-       call     CORINFO_HELP_NEWSFAST
-       mov      rbx, rax
-       mov      edi, 0x439
-       mov      rsi, 0xD1FFAB1E
-       call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, r14
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
-       call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
-       mov      r15, rax
        mov      edi, 0x45B
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ArgumentException:.ctor(System.String,System.String):this
-       call     [rax]System.ArgumentException:.ctor(System.String,System.String):this
-       mov      rdi, rbx
-       call     CORINFO_HELP_THROW
+       mov      rsi, rax
+       mov      edi, ebx
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
        int3     
-						;; size=149 bbWeight=0 PerfScore 0.00
+						;; size=38 bbWeight=0 PerfScore 0.00
 RWD00  	dq	7FFFFFFFFFFFFFFFh, 7FFFFFFFFFFFFFFFh
 RWD16  	dq	4341C37937E08000h	;        1e+16
-RWD24  	dd	G_M33858_IG04 - G_M33858_IG02
-       	dd	G_M33858_IG05 - G_M33858_IG02
+RWD24  	dd	G_M33858_IG05 - G_M33858_IG02
+       	dd	G_M33858_IG04 - G_M33858_IG02
        	dd	G_M33858_IG06 - G_M33858_IG02
        	dd	G_M33858_IG07 - G_M33858_IG02
        	dd	G_M33858_IG08 - G_M33858_IG02
 RWD44  	dd	00000000h
 RWD48  	dq	8000000000000000h, 8000000000000000h
 RWD64  	dq	3FDFFFFFFFFFFFFFh, 3FDFFFFFFFFFFFFFh
 
 
-; Total bytes of code 579, prolog size 15, PerfScore 59.83, instruction count 125, allocated bytes for code 579 (MethodHash=c3c77bbd) for method System.Math:Round(double,int,int):double (FullOpts)
+; Total bytes of code 257, prolog size 11, PerfScore 55.58, instruction count 59, allocated bytes for code 257 (MethodHash=c3c77bbd) for method System.Math:Round(double,int,int):double (FullOpts)

-322 (-55.61 % of base) - System.MathF:Round(float,int,int):float

 ; Assembly listing for method System.MathF:Round(float,int,int):float (FullOpts)
 ; Emitting BLENDED_CODE for X64 with AVX - Unix
 ; FullOpts code
 ; optimized code
 ; rbp based frame
 ; partially interruptible
 ; No PGO data
-; 0 inlinees with PGO data; 1 single block inlinees; 1 inlinees without PGO data
+; 0 inlinees with PGO data; 1 single block inlinees; 2 inlinees without PGO data
 ; Final local variable assignments
 ;
-;  V00 arg0         [V00,T02] ( 19, 11.50)   float  ->  mm0        
-;  V01 arg1         [V01,T01] (  4,  3.50)     int  ->  rdi         single-def
-;  V02 arg2         [V02,T00] (  7,  4   )     int  ->  rbx         single-def
-;  V03 loc0         [V03,T04] (  3,  1.50)   float  ->  mm1        
+;  V00 arg0         [V00,T03] (  6,  5   )   float  ->  mm0        
+;  V01 arg1         [V01,T00] (  4,  3.50)     int  ->  rdi         single-def
+;  V02 arg2         [V02,T01] (  5,  3   )     int  ->  rbx         single-def
+;  V03 loc0         [V03,T06] (  3,  1.50)   float  ->  mm1        
 ;* V04 loc1         [V04    ] (  0,  0   )  struct (16) zero-ref    ld-addr-op <System.ReadOnlySpan`1[float]>
 ;# V05 OutArgs      [V05    ] (  1,  1   )  struct ( 0) [rsp+0x00]  do-not-enreg[XS] addr-exposed "OutgoingArgSpace"
-;  V06 tmp1         [V06,T05] (  3,  0   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.ArgumentOutOfRangeException>
-;  V07 tmp2         [V07,T06] (  3,  0   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.MidpointRounding>
-;  V08 tmp3         [V08,T10] (  2,  0   )     ref  ->  r14         class-hnd exact single-def "impImportAndPushBox" <System.String>
-;  V09 tmp4         [V09,T07] (  3,  0   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.ArgumentException>
-;  V10 tmp5         [V10,T08] (  3,  0   )     ref  ->  r15         class-hnd exact single-def "Single-def Box Helper" <System.MidpointRounding>
-;  V11 tmp6         [V11,T11] (  2,  0   )     ref  ->  r14         class-hnd exact single-def "impImportAndPushBox" <System.String>
-;  V12 tmp7         [V12,T09] (  3,  0   )     ref  ->  rbx         class-hnd exact single-def "NewObj constructor temp" <System.ArgumentException>
-;* V13 tmp8         [V13    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
-;* V14 tmp9         [V14    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
-;* V15 tmp10        [V15    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
-;* V16 tmp11        [V16    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
-;* V17 tmp12        [V17    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V13._reference (fldOffset=0x0)" P-INDEP
-;* V18 tmp13        [V18    ] (  0,  0   )     int  ->  zero-ref    "field V13._length (fldOffset=0x8)" P-INDEP
-;  V19 tmp14        [V19,T12] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V20 tmp15        [V20,T13] (  2,  0   )     ref  ->  r15         single-def "argument with side effect"
-;  V21 tmp16        [V21,T14] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V22 tmp17        [V22,T15] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V23 tmp18        [V23,T16] (  2,  0   )     ref  ->  r15         single-def "argument with side effect"
-;  V24 tmp19        [V24,T17] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V25 tmp20        [V25,T18] (  2,  0   )     ref  ->  r15         single-def "argument with side effect"
-;  V26 tmp21        [V26,T19] (  2,  0   )     ref  ->  rdx         single-def "argument with side effect"
-;  V27 rat0         [V27,T03] (  3,  3   )  simd16  ->  mm2         "ReplaceWithLclVar is creating a new local variable"
+;* V06 tmp1         [V06    ] (  0,  0   )  struct (16) zero-ref    "ReadOnlySpan<T> for CreateSpan<T>" <System.ReadOnlySpan`1[float]>
+;  V07 tmp2         [V07,T04] (  6,  3   )   float  ->  mm2         "Inline return value spill temp"
+;  V08 tmp3         [V08,T02] (  7,  7   )   float  ->  mm2         "Inlining Arg"
+;* V09 tmp4         [V09    ] (  0,  0   )   float  ->  zero-ref    "Inline return value spill temp"
+;* V10 tmp5         [V10    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V04._reference (fldOffset=0x0)" P-INDEP
+;* V11 tmp6         [V11    ] (  0,  0   )     int  ->  zero-ref    "field V04._length (fldOffset=0x8)" P-INDEP
+;* V12 tmp7         [V12    ] (  0,  0   )   byref  ->  zero-ref    single-def "field V06._reference (fldOffset=0x0)" P-INDEP
+;* V13 tmp8         [V13    ] (  0,  0   )     int  ->  zero-ref    "field V06._length (fldOffset=0x8)" P-INDEP
+;  V14 tmp9         [V14,T07] (  2,  0   )     ref  ->  rsi         single-def "argument with side effect"
+;  V15 rat0         [V15,T05] (  3,  3   )  simd16  ->  mm0         "ReplaceWithLclVar is creating a new local variable"
 ;
 ; Lcl frame size = 8
 
 G_M57700_IG01:
        push     rbp
-       push     r15
-       push     r14
        push     rbx
        push     rax
        vzeroupper 
-       lea      rbp, [rsp+0x20]
+       lea      rbp, [rsp+0x10]
        mov      ebx, esi
-						;; size=17 bbWeight=1 PerfScore 6.75
+						;; size=13 bbWeight=1 PerfScore 4.75
 G_M57700_IG02:
        cmp      edi, 6
        ja       G_M57700_IG11
-       cmp      ebx, 4
-       ja       G_M57700_IG12
        vandps   xmm1, xmm0, xmmword ptr [reloc @RWD00]
        vmovss   xmm2, dword ptr [reloc @RWD16]
        vucomiss xmm2, xmm1
        jbe      G_M57700_IG10
-						;; size=44 bbWeight=1 PerfScore 10.50
+						;; size=35 bbWeight=1 PerfScore 9.25
 G_M57700_IG03:
        mov      edi, edi
-       mov      rax, 0xD1FFAB1E      ; static handle
-       vmovss   xmm1, dword ptr [rax+4*rdi]
-       vmulss   xmm0, xmm0, xmm1
+       mov      rsi, 0xD1FFAB1E      ; static handle
+       vmovss   xmm1, dword ptr [rsi+4*rdi]
+       vmulss   xmm2, xmm0, xmm1
        cmp      ebx, 4
-       ja       G_M57700_IG13
+       ja       G_M57700_IG12
        mov      edi, ebx
-       lea      rax, [reloc @RWD20]
-       mov      eax, dword ptr [rax+4*rdi]
-       lea      rcx, G_M57700_IG02
-       add      rax, rcx
-       jmp      rax
+       lea      rsi, [reloc @RWD20]
+       mov      esi, dword ptr [rsi+4*rdi]
+       lea      rax, G_M57700_IG02
+       add      rsi, rax
+       jmp      rsi
 						;; size=54 bbWeight=0.50 PerfScore 7.38
 G_M57700_IG04:
-       vroundss xmm0, xmm0, xmm0, 4
+       vmovups  xmm0, xmmword ptr [reloc @RWD48]
+       vmovaps  xmm3, xmm2
+       vandps   xmm3, xmm3, xmm0
+       vandnps  xmm0, xmm0, xmmword ptr [reloc @RWD64]
+       vorps    xmm0, xmm0, xmm3
+       vaddss   xmm2, xmm0, xmm2
+       vroundss xmm2, xmm2, xmm2, 11
        jmp      SHORT G_M57700_IG09
-						;; size=8 bbWeight=0.50 PerfScore 4.50
+						;; size=40 bbWeight=0.50 PerfScore 8.96
 G_M57700_IG05:
-       vmovups  xmm2, xmmword ptr [reloc @RWD48]
-       vmovaps  xmm3, xmm0
-       vandps   xmm3, xmm3, xmm2
-       vandnps  xmm2, xmm2, xmmword ptr [reloc @RWD64]
-       vorps    xmm2, xmm2, xmm3
-       vaddss   xmm0, xmm2, xmm0
-       vroundss xmm0, xmm0, xmm0, 11
+       vroundss xmm2, xmm2, xmm2, 4
        jmp      SHORT G_M57700_IG09
-						;; size=40 bbWeight=0.50 PerfScore 8.96
+						;; size=8 bbWeight=0.50 PerfScore 4.50
 G_M57700_IG06:
-       vroundss xmm0, xmm0, xmm0, 11
+       vroundss xmm2, xmm2, xmm2, 11
        jmp      SHORT G_M57700_IG09
 						;; size=8 bbWeight=0.50 PerfScore 4.50
 G_M57700_IG07:
-       vroundss xmm0, xmm0, xmm0, 9
+       vroundss xmm2, xmm2, xmm2, 9
        jmp      SHORT G_M57700_IG09
 						;; size=8 bbWeight=0.50 PerfScore 4.50
 G_M57700_IG08:
-       vroundss xmm0, xmm0, xmm0, 10
+       vroundss xmm2, xmm2, xmm2, 10
 						;; size=6 bbWeight=0.50 PerfScore 3.50
 G_M57700_IG09:
-       vdivss   xmm0, xmm0, xmm1
+       vdivss   xmm0, xmm2, xmm1
 						;; size=4 bbWeight=0.50 PerfScore 5.00
 G_M57700_IG10:
        add      rsp, 8
        pop      rbx
-       pop      r14
-       pop      r15
        pop      rbp
        ret      
-						;; size=11 bbWeight=1 PerfScore 3.25
+						;; size=7 bbWeight=1 PerfScore 2.25
 G_M57700_IG11:
-       mov      rdi, 0xD1FFAB1E      ; System.ArgumentOutOfRangeException
-       call     CORINFO_HELP_NEWSFAST
-       mov      rbx, rax
        mov      edi, 0xB21
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
-       mov      r15, rax
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:get_ArgumentOutOfRange_RoundingDigits_MathF():System.String
-       call     [rax]System.SR:get_ArgumentOutOfRange_RoundingDigits_MathF():System.String
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ArgumentOutOfRangeException:.ctor(System.String,System.String):this
-       call     [rax]System.ArgumentOutOfRangeException:.ctor(System.String,System.String):this
-       mov      rdi, rbx
-       call     CORINFO_HELP_THROW
-						;; size=82 bbWeight=0 PerfScore 0.00
+       mov      rdi, rax
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentOutOfRange_RoundingDigits_MathF(System.String)
+       int3     
+						;; size=36 bbWeight=0 PerfScore 0.00
 G_M57700_IG12:
-       mov      rdi, 0xD1FFAB1E      ; System.MidpointRounding
-       call     CORINFO_HELP_NEWSFAST
-       mov      r15, rax
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:get_Argument_InvalidEnumValue():System.String
-       call     [rax]System.SR:get_Argument_InvalidEnumValue():System.String
-       mov      r14, rax
-       mov      dword ptr [r15+0x08], ebx
-       mov      rdi, 0xD1FFAB1E      ; System.ArgumentException
-       call     CORINFO_HELP_NEWSFAST
-       mov      rbx, rax
-       mov      edi, 0x439
-       mov      rsi, 0xD1FFAB1E
-       call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, r14
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
-       call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
-       mov      r15, rax
-       mov      edi, 0x45B
-       mov      rsi, 0xD1FFAB1E
-       call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ArgumentException:.ctor(System.String,System.String):this
-       call     [rax]System.ArgumentException:.ctor(System.String,System.String):this
-       mov      rdi, rbx
-       call     CORINFO_HELP_THROW
-						;; size=148 bbWeight=0 PerfScore 0.00
-G_M57700_IG13:
-       mov      rdi, 0xD1FFAB1E      ; System.MidpointRounding
-       call     CORINFO_HELP_NEWSFAST
-       mov      r15, rax
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:get_Argument_InvalidEnumValue():System.String
-       call     [rax]System.SR:get_Argument_InvalidEnumValue():System.String
-       mov      r14, rax
-       mov      dword ptr [r15+0x08], ebx
-       mov      rdi, 0xD1FFAB1E      ; System.ArgumentException
-       call     CORINFO_HELP_NEWSFAST
-       mov      rbx, rax
-       mov      edi, 0x439
-       mov      rsi, 0xD1FFAB1E
-       call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, r14
-       mov      rax, 0xD1FFAB1E      ; code for System.SR:Format(System.String,System.Object,System.Object):System.String
-       call     [rax]System.SR:Format(System.String,System.Object,System.Object):System.String
-       mov      r15, rax
        mov      edi, 0x45B
        mov      rsi, 0xD1FFAB1E
        call     CORINFO_HELP_STRCNS
-       mov      rdx, rax
-       mov      rsi, r15
-       mov      rdi, rbx
-       mov      rax, 0xD1FFAB1E      ; code for System.ArgumentException:.ctor(System.String,System.String):this
-       call     [rax]System.ArgumentException:.ctor(System.String,System.String):this
-       mov      rdi, rbx
-       call     CORINFO_HELP_THROW
+       mov      rsi, rax
+       mov      edi, ebx
+       mov      rax, 0xD1FFAB1E      ; code for System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
+       call     [rax]System.ThrowHelper:ThrowArgumentException_InvalidEnumValue[int](int,System.String)
        int3     
-						;; size=149 bbWeight=0 PerfScore 0.00
+						;; size=38 bbWeight=0 PerfScore 0.00
 RWD00  	dq	7FFFFFFF7FFFFFFFh, 7FFFFFFF7FFFFFFFh
 RWD16  	dd	4CBEBC20h		;     1e+08
-RWD20  	dd	G_M57700_IG04 - G_M57700_IG02
-       	dd	G_M57700_IG05 - G_M57700_IG02
+RWD20  	dd	G_M57700_IG05 - G_M57700_IG02
+       	dd	G_M57700_IG04 - G_M57700_IG02
        	dd	G_M57700_IG06 - G_M57700_IG02
        	dd	G_M57700_IG07 - G_M57700_IG02
        	dd	G_M57700_IG08 - G_M57700_IG02
 RWD40  	dd	00000000h, 00000000h
 RWD48  	dq	8000000080000000h, 8000000080000000h
 RWD64  	dq	3EFFFFFF3EFFFFFFh, 3EFFFFFF3EFFFFFFh
 
 
-; Total bytes of code 579, prolog size 15, PerfScore 58.83, instruction count 125, allocated bytes for code 579 (MethodHash=9ec81e9b) for method System.MathF:Round(float,int,int):float (FullOpts)
+; Total bytes of code 257, prolog size 11, PerfScore 54.58, instruction count 59, allocated bytes for code 257 (MethodHash=9ec81e9b) for method System.MathF:Round(float,int,int):float (FullOpts)

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