This patch adds multiversioning for target "pclmul", after similar patch has been committed for multiversioning for taget "aes".
libgcc/ChangeLog: 2015-08-11 Uros Bizjak <ubiz...@gmail.com> PR target/66954 * config/i386/cpuinfo.c (enum processor_features): Add FEATURE_PCLMUL. (get_available_features): Handle FEATURE_PCLMUL. gcc/ChangeLog: 2015-08-11 Uros Bizjak <ubiz...@gmail.com> PR target/66954 * config/i386/i386.c (get_builtin_code_for_version): Add P_PCLMUL to enum feature_priority and feature_list. (fold_builtin_cpu): Add F_PCLMUL to enum processor_features and isa_names_table. gcc/testsuite/ChangeLog: 2015-08-11 Uros Bizjak <ubiz...@gmail.com> PR target/66954 * g++.dg/ext/mv25.C: New test. Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}. Committed to mainline SVN. Uros.
Index: libgcc/config/i386/cpuinfo.c =================================================================== --- libgcc/config/i386/cpuinfo.c (revision 226773) +++ libgcc/config/i386/cpuinfo.c (working copy) @@ -101,7 +101,8 @@ enum processor_features FEATURE_AVX512F, FEATURE_BMI, FEATURE_BMI2, - FEATURE_AES + FEATURE_AES, + FEATURE_PCLMUL }; struct __processor_model @@ -277,6 +278,8 @@ get_available_features (unsigned int ecx, unsigned features |= (1 << FEATURE_POPCNT); if (ecx & bit_AES) features |= (1 << FEATURE_AES); + if (ecx & bit_PCLMUL) + features |= (1 << FEATURE_PCLMUL); if (ecx & bit_SSE3) features |= (1 << FEATURE_SSE3); if (ecx & bit_SSSE3) Index: gcc/testsuite/g++.dg/ext/mv25.C =================================================================== --- gcc/testsuite/g++.dg/ext/mv25.C (revision 0) +++ gcc/testsuite/g++.dg/ext/mv25.C (revision 0) @@ -0,0 +1,35 @@ +// Test case to check if Multiversioning works for PCLMUL + +// { dg-do run { target i?86-*-* x86_64-*-* } } +// { dg-require-ifunc "" } +// { dg-options "-O2" } + +#include <assert.h> + +// Check if PCLMUL feature selection works +int foo () __attribute__((target("default"))); +int foo () __attribute__((target("pclmul"))); + +int main () +{ + int val = foo (); + + if (__builtin_cpu_supports ("pclmul")) + assert (val == 1); + else + assert (val == 0); + + return 0; +} + +int __attribute__ ((target("default"))) +foo () +{ + return 0; +} + +int __attribute__ ((target("pclmul"))) +foo () +{ + return 1; +} Index: gcc/config/i386/i386.c =================================================================== --- gcc/config/i386/i386.c (revision 226773) +++ gcc/config/i386/i386.c (working copy) @@ -34574,6 +34574,7 @@ get_builtin_code_for_version (tree decl, tree *pre P_PROC_SSE4_2, P_POPCNT, P_AES, + P_PCLMUL, P_AVX, P_PROC_AVX, P_BMI, @@ -34612,6 +34613,7 @@ get_builtin_code_for_version (tree decl, tree *pre {"sse4.2", P_SSE4_2}, {"popcnt", P_POPCNT}, {"aes", P_AES}, + {"pclmul", P_PCLMUL}, {"avx", P_AVX}, {"bmi", P_BMI}, {"fma4", P_FMA4}, @@ -35600,6 +35602,7 @@ fold_builtin_cpu (tree fndecl, tree *args) F_BMI, F_BMI2, F_AES, + F_PCLMUL, F_MAX }; @@ -35696,7 +35699,8 @@ fold_builtin_cpu (tree fndecl, tree *args) {"avx512f",F_AVX512F}, {"bmi", F_BMI}, {"bmi2", F_BMI2}, - {"aes", F_AES} + {"aes", F_AES}, + {"pclmul", F_PCLMUL} }; tree __processor_model_type = build_processor_model_struct ();