93 lines
3.5 KiB
Diff
93 lines
3.5 KiB
Diff
|
From 83c5b368226c34a2f0a5287df40fc290b2b34359 Mon Sep 17 00:00:00 2001
|
||
|
|
From: "H.J. Lu" <hjl.tools@gmail.com>
|
||
|
|
Date: Mon, 19 Apr 2021 10:45:07 -0700
|
||
|
|
Subject: [PATCH] x86-64: Require BMI2 for strchr-avx2.S
|
||
|
|
Content-type: text/plain; charset=UTF-8
|
||
|
|
|
||
|
|
Since strchr-avx2.S updated by
|
||
|
|
|
||
|
|
commit 1f745ecc2109890886b161d4791e1406fdfc29b8
|
||
|
|
Author: noah <goldstein.w.n@gmail.com>
|
||
|
|
Date: Wed Feb 3 00:38:59 2021 -0500
|
||
|
|
|
||
|
|
x86-64: Refactor and improve performance of strchr-avx2.S
|
||
|
|
|
||
|
|
uses sarx:
|
||
|
|
|
||
|
|
c4 e2 72 f7 c0 sarx %ecx,%eax,%eax
|
||
|
|
|
||
|
|
for strchr-avx2 family functions, require BMI2 in ifunc-impl-list.c and
|
||
|
|
ifunc-avx2.h.
|
||
|
|
---
|
||
|
|
sysdeps/x86_64/multiarch/ifunc-avx2.h | 4 ++--
|
||
|
|
sysdeps/x86_64/multiarch/ifunc-impl-list.c | 12 +++++++++---
|
||
|
|
2 files changed, 11 insertions(+), 5 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/sysdeps/x86_64/multiarch/ifunc-avx2.h b/sysdeps/x86_64/multiarch/ifunc-avx2.h
|
||
|
|
index e0f30e61..ef72b73f 100644
|
||
|
|
--- a/sysdeps/x86_64/multiarch/ifunc-avx2.h
|
||
|
|
+++ b/sysdeps/x86_64/multiarch/ifunc-avx2.h
|
||
|
|
@@ -30,11 +30,11 @@ IFUNC_SELECTOR (void)
|
||
|
|
const struct cpu_features* cpu_features = __get_cpu_features ();
|
||
|
|
|
||
|
|
if (CPU_FEATURE_USABLE_P (cpu_features, AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE_P (cpu_features, BMI2)
|
||
|
|
&& CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
|
||
|
|
{
|
||
|
|
if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
|
||
|
|
- && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)
|
||
|
|
- && CPU_FEATURE_USABLE_P (cpu_features, BMI2))
|
||
|
|
+ && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW))
|
||
|
|
return OPTIMIZE (evex);
|
||
|
|
|
||
|
|
if (CPU_FEATURE_USABLE_P (cpu_features, RTM))
|
||
|
|
diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
|
||
|
|
index 695cdba6..85b8863a 100644
|
||
|
|
--- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c
|
||
|
|
+++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
|
||
|
|
@@ -400,10 +400,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
|
||
|
|
/* Support sysdeps/x86_64/multiarch/strchr.c. */
|
||
|
|
IFUNC_IMPL (i, name, strchr,
|
||
|
|
IFUNC_IMPL_ADD (array, i, strchr,
|
||
|
|
- CPU_FEATURE_USABLE (AVX2),
|
||
|
|
+ (CPU_FEATURE_USABLE (AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE (BMI2)),
|
||
|
|
__strchr_avx2)
|
||
|
|
IFUNC_IMPL_ADD (array, i, strchr,
|
||
|
|
(CPU_FEATURE_USABLE (AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE (BMI2)
|
||
|
|
&& CPU_FEATURE_USABLE (RTM)),
|
||
|
|
__strchr_avx2_rtm)
|
||
|
|
IFUNC_IMPL_ADD (array, i, strchr,
|
||
|
|
@@ -417,10 +419,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
|
||
|
|
/* Support sysdeps/x86_64/multiarch/strchrnul.c. */
|
||
|
|
IFUNC_IMPL (i, name, strchrnul,
|
||
|
|
IFUNC_IMPL_ADD (array, i, strchrnul,
|
||
|
|
- CPU_FEATURE_USABLE (AVX2),
|
||
|
|
+ (CPU_FEATURE_USABLE (AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE (BMI2)),
|
||
|
|
__strchrnul_avx2)
|
||
|
|
IFUNC_IMPL_ADD (array, i, strchrnul,
|
||
|
|
(CPU_FEATURE_USABLE (AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE (BMI2)
|
||
|
|
&& CPU_FEATURE_USABLE (RTM)),
|
||
|
|
__strchrnul_avx2_rtm)
|
||
|
|
IFUNC_IMPL_ADD (array, i, strchrnul,
|
||
|
|
@@ -574,10 +578,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
|
||
|
|
/* Support sysdeps/x86_64/multiarch/wcschr.c. */
|
||
|
|
IFUNC_IMPL (i, name, wcschr,
|
||
|
|
IFUNC_IMPL_ADD (array, i, wcschr,
|
||
|
|
- CPU_FEATURE_USABLE (AVX2),
|
||
|
|
+ (CPU_FEATURE_USABLE (AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE (BMI2)),
|
||
|
|
__wcschr_avx2)
|
||
|
|
IFUNC_IMPL_ADD (array, i, wcschr,
|
||
|
|
(CPU_FEATURE_USABLE (AVX2)
|
||
|
|
+ && CPU_FEATURE_USABLE (BMI2)
|
||
|
|
&& CPU_FEATURE_USABLE (RTM)),
|
||
|
|
__wcschr_avx2_rtm)
|
||
|
|
IFUNC_IMPL_ADD (array, i, wcschr,
|
||
|
|
--
|
||
|
|
GitLab
|
||
|
|
|