diff options
Diffstat (limited to 'REORG.TODO/sysdeps/s390/multiarch/ifunc-resolve.h')
| -rw-r--r-- | REORG.TODO/sysdeps/s390/multiarch/ifunc-resolve.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/s390/multiarch/ifunc-resolve.h b/REORG.TODO/sysdeps/s390/multiarch/ifunc-resolve.h new file mode 100644 index 0000000000..adbd08a6ee --- /dev/null +++ b/REORG.TODO/sysdeps/s390/multiarch/ifunc-resolve.h @@ -0,0 +1,90 @@ +/* IFUNC resolver function for CPU specific functions. + 32/64 bit S/390 version. + Copyright (C) 2015-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <unistd.h> +#include <dl-procinfo.h> + +#define S390_STFLE_BITS_Z10 34 /* General instructions extension */ +#define S390_STFLE_BITS_Z196 45 /* Distinct operands, pop ... */ + +#define S390_IS_Z196(STFLE_BITS) \ + ((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z196))) != 0) + +#define S390_IS_Z10(STFLE_BITS) \ + ((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z10))) != 0) + +#define S390_STORE_STFLE(STFLE_BITS) \ + /* We want just 1 double word to be returned. */ \ + register unsigned long reg0 __asm__("0") = 0; \ + \ + __asm__ __volatile__(".machine push" "\n\t" \ + ".machine \"z9-109\"" "\n\t" \ + ".machinemode \"zarch_nohighgprs\"\n\t" \ + "stfle %0" "\n\t" \ + ".machine pop" "\n" \ + : "=QS" (STFLE_BITS), "+d" (reg0) \ + : : "cc"); +#define s390_libc_ifunc_init() \ + unsigned long long stfle_bits = 0ULL; \ + if (__glibc_likely((dl_hwcap & HWCAP_S390_STFLE) \ + && (dl_hwcap & HWCAP_S390_ZARCH) \ + && (dl_hwcap & HWCAP_S390_HIGH_GPRS))) \ + { \ + S390_STORE_STFLE (stfle_bits); \ + } + +#define s390_libc_ifunc(TYPE_FUNC, RESOLVERFUNC, FUNC) \ + /* Make the declarations of the optimized functions hidden in order + to prevent GOT slots being generated for them. */ \ + extern __typeof (TYPE_FUNC) RESOLVERFUNC##_z196 attribute_hidden; \ + extern __typeof (TYPE_FUNC) RESOLVERFUNC##_z10 attribute_hidden; \ + extern __typeof (TYPE_FUNC) RESOLVERFUNC##_default attribute_hidden; \ + __ifunc (TYPE_FUNC, FUNC, \ + __glibc_likely (S390_IS_Z196 (stfle_bits)) \ + ? RESOLVERFUNC##_z196 \ + : __glibc_likely (S390_IS_Z10 (stfle_bits)) \ + ? RESOLVERFUNC##_z10 \ + : RESOLVERFUNC##_default, \ + unsigned long int dl_hwcap, s390_libc_ifunc_init); + +#define s390_vx_libc_ifunc(FUNC) \ + s390_vx_libc_ifunc2_redirected(FUNC, FUNC, FUNC) + +#define s390_vx_libc_ifunc_redirected(TYPE_FUNC, FUNC) \ + s390_vx_libc_ifunc2_redirected(TYPE_FUNC, FUNC, FUNC) + +#define s390_vx_libc_ifunc2(RESOLVERFUNC, FUNC) \ + s390_vx_libc_ifunc2_redirected(FUNC, RESOLVERFUNC, FUNC) + +#define s390_vx_libc_ifunc_init() +#define s390_vx_libc_ifunc2_redirected(TYPE_FUNC, RESOLVERFUNC, FUNC) \ + /* Make the declarations of the optimized functions hidden in order + to prevent GOT slots being generated for them. */ \ + extern __typeof (TYPE_FUNC) RESOLVERFUNC##_vx attribute_hidden; \ + extern __typeof (TYPE_FUNC) RESOLVERFUNC##_c attribute_hidden; \ + __ifunc (TYPE_FUNC, FUNC, \ + (dl_hwcap & HWCAP_S390_VX) \ + ? RESOLVERFUNC##_vx \ + : RESOLVERFUNC##_c, \ + unsigned long int dl_hwcap, s390_vx_libc_ifunc_init); + +#define s390_libc_ifunc_expr_init() +#define s390_libc_ifunc_expr(TYPE_FUNC, FUNC, EXPR) \ + __ifunc (TYPE_FUNC, FUNC, EXPR, unsigned long int hwcap, \ + s390_libc_ifunc_expr_init); |