From fd484e057dd4d2813182df08584a4c48d6f1dd7a Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Wed, 26 Aug 2015 10:26:19 +0200 Subject: [PATCH] S390: Ifunc resolver macro for vector instructions. This patch introduces a s390 specific ifunc resolver macro for 32/64bit, which chooses _vx with vector instructions if HWCAP_S390_VX flag in hwcaps is set or _c if not. ChangeLog: * sysdeps/s390/multiarch/ifunc-resolve.h (s390_vx_libc_ifunc, s390_vx_libc_ifunc2): New macro function. --- ChangeLog | 5 +++++ sysdeps/s390/multiarch/ifunc-resolve.h | 19 +++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/ChangeLog b/ChangeLog index 19d089acc8..9304378573 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,10 @@ 2015-08-26 Stefan Liebler + * sysdeps/s390/multiarch/ifunc-resolve.h (s390_vx_libc_ifunc, + s390_vx_libc_ifunc2): New macro function. + +2015-08-26 Stefan Liebler + * config.h.in (HAVE_S390_VX_ASM_SUPPORT): New macro undefine. * sysdeps/s390/configure.ac: Add test for S390 vector instruction assembler support. 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"); -- 2.11.4.GIT