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authorStefan Liebler <stli@linux.vnet.ibm.com>2015-08-26 10:26:19 +0200
committerAndreas Krebbel <krebbel@linux.vnet.ibm.com>2015-08-26 10:26:19 +0200
commitfd484e057dd4d2813182df08584a4c48d6f1dd7a (patch)
tree427e56a86a946d2f3e3dcaba23300e7f666c40b9 /sysdeps/s390
parent4f0a1cea34c05fb2acc16f1a2d291f53230eb4fb (diff)
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S390: Ifunc resolver macro for vector instructions.
This patch introduces a s390 specific ifunc resolver macro for 32/64bit, which chooses <func>_vx with vector instructions if HWCAP_S390_VX flag in hwcaps is set or <func>_c if not. ChangeLog: * sysdeps/s390/multiarch/ifunc-resolve.h (s390_vx_libc_ifunc, s390_vx_libc_ifunc2): New macro function.
Diffstat (limited to 'sysdeps/s390')
-rw-r--r--sysdeps/s390/multiarch/ifunc-resolve.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/sysdeps/s390/multiarch/ifunc-resolve.h b/sysdeps/s390/multiarch/ifunc-resolve.h
index 491df68a61..e9fd90e26b 100644
--- a/sysdeps/s390/multiarch/ifunc-resolve.h
+++ b/sysdeps/s390/multiarch/ifunc-resolve.h
@@ -73,3 +73,22 @@
else \
return &__##FUNC##_default; \
}
+
+#define s390_vx_libc_ifunc(FUNC) \
+ s390_vx_libc_ifunc2(FUNC, FUNC)
+
+#define s390_vx_libc_ifunc2(RESOLVERFUNC, FUNC) \
+ /* Make the declarations of the optimized functions hidden in order
+ to prevent GOT slots being generated for them. */ \
+ extern __typeof (FUNC) RESOLVERFUNC##_vx attribute_hidden; \
+ extern __typeof (FUNC) RESOLVERFUNC##_c attribute_hidden; \
+ extern void *__resolve_##RESOLVERFUNC (unsigned long int) __asm__ (#FUNC); \
+ \
+ void *__resolve_##RESOLVERFUNC (unsigned long int dl_hwcap) \
+ { \
+ if (dl_hwcap & HWCAP_S390_VX) \
+ return &RESOLVERFUNC##_vx; \
+ else \
+ return &RESOLVERFUNC##_c; \
+ } \
+ __asm__ (".type " #FUNC ", %gnu_indirect_function");