From b13a91507798183556d7e1891fe3d4cd3a947aa6 Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Thu, 8 Oct 2015 10:48:13 +0200 Subject: [PATCH 09/30] S390: Ifunc resolver macro for vector instructions. upstream-commit-id: fd484e057dd4d2813182df08584a4c48d6f1dd7a https://www.sourceware.org/ml/libc-alpha/2015-07/msg00076.html 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. --- sysdeps/s390/multiarch/ifunc-resolve.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/sysdeps/s390/multiarch/ifunc-resolve.h b/sysdeps/s390/multiarch/ifunc-resolve.h index 491df68..e9fd90e 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"); -- 2.3.0