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| author | Stefan Liebler <stli@linux.ibm.com> | 2021-03-31 16:17:01 +0200 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2021-04-01 09:14:20 +0200 |
| commit | 01e045117520200a1285ed112576c1be002a34d6 (patch) | |
| tree | 0ae1140eb60c8977aa385909fc660cf2603b9ceb /sysdeps | |
| parent | a0bf2897ce1afb30296e7b886e344dad0c788c0f (diff) | |
| download | glibc-01e045117520200a1285ed112576c1be002a34d6.tar.gz glibc-01e045117520200a1285ed112576c1be002a34d6.tar.xz glibc-01e045117520200a1285ed112576c1be002a34d6.zip | |
S390: Allow "v" constraint for long double math_opt_barrier and math_force_eval with GCC 11.
Starting with GCC 11, long double values can also be processed in vector registers if build with -march >= z14. Then GCC defines the __LONG_DOUBLE_VX__ macro. FYI: GCC commit "IBM Z: Introduce __LONG_DOUBLE_VX__ macro" https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=f47df2af313d2ce7f9149149010a142c2237beda
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/s390/fpu/math-barriers.h | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/sysdeps/s390/fpu/math-barriers.h b/sysdeps/s390/fpu/math-barriers.h index 68a3e55098..13fd30017f 100644 --- a/sysdeps/s390/fpu/math-barriers.h +++ b/sysdeps/s390/fpu/math-barriers.h @@ -21,13 +21,26 @@ #ifdef HAVE_S390_VX_GCC_SUPPORT # define ASM_CONSTRAINT_VR "v" +# ifdef __LONG_DOUBLE_VX__ +/* Starting with gcc 11, long double values can also be processed in vector + registers if build with -march >= z14. Then GCC defines the + __LONG_DOUBLE_VX__ macro. */ +# define ASM_LONG_DOUBLE_IN_VR 1 +# else +# define ASM_LONG_DOUBLE_IN_VR 0 +# endif #else # define ASM_CONSTRAINT_VR +# define ASM_LONG_DOUBLE_IN_VR 0 #endif #define math_opt_barrier(x) \ ({ __typeof (x) __x = (x); \ - if (__builtin_types_compatible_p (__typeof (x), _Float128)) \ + if (! ASM_LONG_DOUBLE_IN_VR \ + && (__builtin_types_compatible_p (__typeof (x), _Float128) \ + || __builtin_types_compatible_p (__typeof (x), long double) \ + ) \ + ) \ __asm__ ("# math_opt_barrier_f128 %0" : "+fm" (__x)); \ else \ __asm__ ("# math_opt_barrier %0" \ @@ -35,7 +48,11 @@ __x; }) #define math_force_eval(x) \ ({ __typeof (x) __x = (x); \ - if (__builtin_types_compatible_p (__typeof (x), _Float128)) \ + if (! ASM_LONG_DOUBLE_IN_VR \ + && (__builtin_types_compatible_p (__typeof (x), _Float128) \ + || __builtin_types_compatible_p (__typeof (x), long double) \ + ) \ + ) \ __asm__ __volatile__ ("# math_force_eval_f128 %0" \ : : "fm" (__x)); \ else \ |