From: H.J. Lu Date: Tue, 29 Mar 2016 02:22:59 +0000 (-0700) Subject: Initial Enhanced REP MOVSB/STOSB (ERMS) support X-Git-Tag: glibc-2.24~448 X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=0791f91dff9a77263fa8173b143d854cad902c6d;p=glibc.git Initial Enhanced REP MOVSB/STOSB (ERMS) support The newer Intel processors support Enhanced REP MOVSB/STOSB (ERMS) which has a feature bit in CPUID. This patch adds the Enhanced REP MOVSB/STOSB (ERMS) bit to x86 cpu-features. * sysdeps/x86/cpu-features.h (bit_cpu_ERMS): New. (index_cpu_ERMS): Likewise. (reg_ERMS): Likewise. --- diff --git a/ChangeLog b/ChangeLog index 4c8a788072..ad5d881ba7 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2016-03-28 H.J. Lu + + * sysdeps/x86/cpu-features.h (bit_cpu_ERMS): New. + (index_cpu_ERMS): Likewise. + (reg_ERMS): Likewise. + 2016-03-28 Aurelien Jarno * sysdeps/unix/sysv/linux/sys/personality.h (UNAME26, FDPIC_FUNCPTRS, diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h index bfe1f4c68d..8f946c4f6f 100644 --- a/sysdeps/x86/cpu-features.h +++ b/sysdeps/x86/cpu-features.h @@ -53,6 +53,7 @@ #define bit_cpu_FMA4 (1 << 16) /* COMMON_CPUID_INDEX_7. */ +#define bit_cpu_ERMS (1 << 9) #define bit_cpu_RTM (1 << 11) #define bit_cpu_AVX2 (1 << 5) #define bit_cpu_AVX512F (1 << 16) @@ -84,6 +85,7 @@ # define index_cpu_SSE4_2 COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_cpu_AVX COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET # define index_cpu_AVX2 COMMON_CPUID_INDEX_7*CPUID_SIZE+CPUID_EBX_OFFSET +# define index_cpu_ERMS COMMON_CPUID_INDEX_7*CPUID_SIZE+CPUID_EBX_OFFSET # define index_arch_Fast_Rep_String FEATURE_INDEX_1*FEATURE_SIZE # define index_arch_Fast_Copy_Backward FEATURE_INDEX_1*FEATURE_SIZE @@ -228,6 +230,7 @@ extern const struct cpu_features *__get_cpu_features (void) # define index_cpu_AVX2 COMMON_CPUID_INDEX_7 # define index_cpu_AVX512F COMMON_CPUID_INDEX_7 # define index_cpu_AVX512DQ COMMON_CPUID_INDEX_7 +# define index_cpu_ERMS COMMON_CPUID_INDEX_7 # define index_cpu_RTM COMMON_CPUID_INDEX_7 # define index_cpu_FMA COMMON_CPUID_INDEX_1 # define index_cpu_FMA4 COMMON_CPUID_INDEX_80000001 @@ -244,6 +247,7 @@ extern const struct cpu_features *__get_cpu_features (void) # define reg_AVX2 ebx # define reg_AVX512F ebx # define reg_AVX512DQ ebx +# define reg_ERMS ebx # define reg_RTM ebx # define reg_FMA ecx # define reg_FMA4 ecx