diff options
| author | liuhongt <hongtao.liu@intel.com> | 2021-09-24 10:03:20 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2021-09-26 09:04:41 +0800 |
| commit | e98e12c40bf3b2d37c3d9acb914fef495c704da5 (patch) | |
| tree | d0ab639cae2974574020d82fa5fc4594baebafa6 /gcc | |
| parent | f5ef07a32280ac2adaf4d9b73982fc16a5bb5218 (diff) | |
| download | gcc-e98e12c40bf3b2d37c3d9acb914fef495c704da5.zip gcc-e98e12c40bf3b2d37c3d9acb914fef495c704da5.tar.gz gcc-e98e12c40bf3b2d37c3d9acb914fef495c704da5.tar.bz2 | |
Remove storage only description for _Float16 w/o avx512fp16.
gcc/ChangeLog:
* doc/extend.texi (Half-Precision): Remove storage only
description for _Float16 w/o avx512fp16.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/doc/extend.texi | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 63be63f..b4c5376 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -1156,12 +1156,11 @@ It is recommended that portable code use the @code{_Float16} type defined by ISO/IEC TS 18661-3:2015. @xref{Floating Types}. On x86 targets with SSE2 enabled, without @option{-mavx512fp16}, -@code{_Float16} type is storage only, all operations will be emulated by -software emulation and the @code{float} instructions. The default behavior -for @code{FLT_EVAL_METHOD} is to keep the intermediate result of the operation -as 32-bit precision. This may lead to inconsistent behavior between software -emulation and AVX512-FP16 instructions. Using @option{-fexcess-precision=16} -will force round back after each operation. +all operations will be emulated by software emulation and the @code{float} +instructions. The default behavior for @code{FLT_EVAL_METHOD} is to keep the +intermediate result of the operation as 32-bit precision. This may lead to +inconsistent behavior between software emulation and AVX512-FP16 instructions. +Using @option{-fexcess-precision=16} will force round back after each operation. Using @option{-mavx512fp16} will generate AVX512-FP16 instructions instead of software emulation. The default behavior of @code{FLT_EVAL_METHOD} is to round |