Skip to content

[libc] Fix typo in long double negative block #68243

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Oct 4, 2023
Merged

[libc] Fix typo in long double negative block #68243

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
c9f6955
[libc] Fix typo in long double negative block
michaelrj-google Oct 4, 2023
0ab8d42
Reorganize tests
michaelrj-google Oct 4, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion libc/src/__support/float_to_string.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -708,7 +708,7 @@ FloatToString<long double>::get_negative_block(int block_index) {
const int32_t SHIFT_CONST = TABLE_SHIFT_CONST;

// if the requested block is zero
if (block_index <= MIN_BLOCK_2[idx]) {
if (block_index < MIN_BLOCK_2[idx]) {
return 0;
}
const uint32_t p = POW10_OFFSET_2[idx] + block_index - MIN_BLOCK_2[idx];
Expand Down
19 changes: 19 additions & 0 deletions libc/test/src/stdio/sprintf_test.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2433,6 +2433,9 @@ TEST_F(LlvmLibcSPrintfTest, FloatAutoConv) {
written = LIBC_NAMESPACE::sprintf(buff, "%g", 9999999000000.00);
ASSERT_STREQ_LEN(written, buff, "1e+13");

written = LIBC_NAMESPACE::sprintf(buff, "%g", 0xa.aaaaaaaaaaaaaabp-7);
ASSERT_STREQ_LEN(written, buff, "0.0833333");

// Simple Subnormal Tests.

written = LIBC_NAMESPACE::sprintf(buff, "%g", 0x1.0p-1027);
Expand All @@ -2457,9 +2460,16 @@ TEST_F(LlvmLibcSPrintfTest, FloatAutoConv) {

// Length Modifier Tests.

#if defined(SPECIAL_X86_LONG_DOUBLE)

written = LIBC_NAMESPACE::sprintf(buff, "%Lg", 0xf.fffffffffffffffp+16380L);
ASSERT_STREQ_LEN(written, buff, "1.18973e+4932");

written = LIBC_NAMESPACE::sprintf(buff, "%Lg", 0xa.aaaaaaaaaaaaaabp-7L);
ASSERT_STREQ_LEN(written, buff, "0.0833333");

#endif // SPECIAL_X86_LONG_DOUBLE

// TODO: Uncomment the below tests after long double support is added
/*
written = LIBC_NAMESPACE::sprintf(buff, "%Lf", 1e100L);
Expand Down Expand Up @@ -2757,6 +2767,15 @@ TEST_F(LlvmLibcSPrintfTest, FloatAutoConv) {
written = LIBC_NAMESPACE::sprintf(buff, "%.10g", 0x1.0p-1074);
ASSERT_STREQ_LEN(written, buff, "4.940656458e-324");

#if defined(SPECIAL_X86_LONG_DOUBLE)

written = LIBC_NAMESPACE::sprintf(buff, "%.60Lg", 0xa.aaaaaaaaaaaaaabp-7L);
ASSERT_STREQ_LEN(
written, buff,
"0.0833333333333333333355920878593448009041821933351457118988037");

#endif // SPECIAL_X86_LONG_DOUBLE

// Long double precision tests.
// These are currently commented out because they require long double support
// that isn't ready yet.
Expand Down