procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

aarch64: PR target/115457 Implement missing __ARM_FEATURE_BF16 macro

Browse source 
The ACLE asks the user to test for __ARM_FEATURE_BF16 before using the
<arm_bf16.h> header but GCC doesn't set this up.
LLVM does, so this is an inconsistency between the compilers.

This patch enables that macro for TARGET_BF16_FP.
Bootstrapped and tested on aarch64-none-linux-gnu.

gcc/

	PR target/115457
	* config/aarch64/aarch64-c.cc (aarch64_update_cpp_builtins):
	Define __ARM_FEATURE_BF16 for TARGET_BF16_FP.

gcc/testsuite/

	PR target/115457
	* gcc.target/aarch64/acle/bf16_feature.c: New test.

Signed-off-by: Kyrylo Tkachov <ktkachov@nvidia.com>
This commit is contained in:
Kyrylo Tkachov 2024-06-27 16:10:41 +05:30
parent 03a810da10
commit c10942134f
2 changed files with 12 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
gcc/config/aarch64/aarch64-c.cc
View file

@ -252,6 +252,8 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
"__ARM_FEATURE_BF16_VECTOR_ARITHMETIC", pfile);
aarch64_def_or_undef (TARGET_BF16_FP,
"__ARM_FEATURE_BF16_SCALAR_ARITHMETIC", pfile);
aarch64_def_or_undef (TARGET_BF16_FP,
"__ARM_FEATURE_BF16", pfile);
aarch64_def_or_undef (TARGET_LS64,
"__ARM_FEATURE_LS64", pfile);
aarch64_def_or_undef (AARCH64_ISA_RCPC, "__ARM_FEATURE_RCPC", pfile);

10
gcc/testsuite/gcc.target/aarch64/acle/bf16_feature.c Normal file
View file

@ -0,0 +1,10 @@
/* { dg-do compile } */
#pragma GCC target "+bf16"
#ifndef __ARM_FEATURE_BF16
#error "__ARM_FEATURE_BF16 is not defined but should be!"
#endif
void
foo (void) {}