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authorStefan Liebler <stli@linux.ibm.com>2021-03-31 16:17:01 +0200
committerStefan Liebler <stli@linux.ibm.com>2021-04-01 09:14:20 +0200
commit01e045117520200a1285ed112576c1be002a34d6 (patch)
tree0ae1140eb60c8977aa385909fc660cf2603b9ceb /sysdeps/s390
parenta0bf2897ce1afb30296e7b886e344dad0c788c0f (diff)
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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/s390')
-rw-r--r--sysdeps/s390/fpu/math-barriers.h21
1 files changed, 19 insertions, 2 deletions
diff --git a/sysdeps/s390/fpu/math-barriers.h b/sysdeps/s390/fpu/math-barriers.h
index 68a3e55..13fd300 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 \