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| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2015-08-26 10:26:19 +0200 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2015-08-26 10:26:19 +0200 |
| commit | fd484e057dd4d2813182df08584a4c48d6f1dd7a (patch) | |
| tree | 427e56a86a946d2f3e3dcaba23300e7f666c40b9 /sysdeps | |
| parent | 4f0a1cea34c05fb2acc16f1a2d291f53230eb4fb (diff) | |
| download | glibc-fd484e057dd4d2813182df08584a4c48d6f1dd7a.tar glibc-fd484e057dd4d2813182df08584a4c48d6f1dd7a.tar.gz glibc-fd484e057dd4d2813182df08584a4c48d6f1dd7a.tar.bz2 glibc-fd484e057dd4d2813182df08584a4c48d6f1dd7a.zip | |
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')
| -rw-r--r-- | sysdeps/s390/multiarch/ifunc-resolve.h | 19 |
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"); |