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commit 9016b6f3893789ddfbd978aa572b46b3d3ce762f
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Sat Jul 11 09:04:34 2020 -0700
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x86: Remove the unused __x86_prefetchw
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Since
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commit c867597bff2562180a18da4b8dba89d24e8b65c4
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Wed Jun 8 13:57:50 2016 -0700
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X86-64: Remove previous default/SSE2/AVX2 memcpy/memmove
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removed the only usage of __x86_prefetchw, we can remove the unused
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__x86_prefetchw.
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Conflicts:
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sysdeps/x86/cacheinfo.c
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(Different backport order downstream, related to cache
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comptuation. Also had to remove the now-unused eax variable.)
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diff --git a/sysdeps/i386/Makefile b/sysdeps/i386/Makefile
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index c0a4fe15d47bff1c..41b345c6c6274c01 100644
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--- a/sysdeps/i386/Makefile
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+++ b/sysdeps/i386/Makefile
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@@ -13,10 +13,6 @@ ifeq ($(subdir),math)
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CFLAGS-e_gamma_r.c += -DMATH_SET_BOTH_ROUNDING_MODES
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endif
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-ifeq ($(subdir),string)
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-sysdep_routines += cacheinfo
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-endif
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-
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ifeq ($(subdir),gmon)
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sysdep_routines += i386-mcount
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endif
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diff --git a/sysdeps/i386/cacheinfo.c b/sysdeps/i386/cacheinfo.c
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deleted file mode 100644
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index f15fe0779afebb8f..0000000000000000
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--- a/sysdeps/i386/cacheinfo.c
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+++ /dev/null
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@@ -1,3 +0,0 @@
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-#define DISABLE_PREFETCHW
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-
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-#include <sysdeps/x86/cacheinfo.c>
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diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
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index a936134a577e42a5..962bbcb07eba1259 100644
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--- a/sysdeps/x86/Makefile
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+++ b/sysdeps/x86/Makefile
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@@ -14,6 +14,10 @@ gen-as-const-headers += jmp_buf-ssp.sym
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sysdep_routines += __longjmp_cancel
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endif
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+ifeq ($(subdir),string)
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+sysdep_routines += cacheinfo
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+endif
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+
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ifneq ($(enable-cet),no)
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ifeq ($(subdir),elf)
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sysdep-dl-routines += dl-cet
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diff --git a/sysdeps/x86/cacheinfo.c b/sysdeps/x86/cacheinfo.c
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index c741a69fb19a1e95..f4edbc0103beb435 100644
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--- a/sysdeps/x86/cacheinfo.c
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+++ b/sysdeps/x86/cacheinfo.c
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@@ -536,11 +536,6 @@ long int __x86_rep_movsb_threshold attribute_hidden = 2048;
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/* Threshold to use Enhanced REP STOSB. */
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long int __x86_rep_stosb_threshold attribute_hidden = 2048;
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-#ifndef DISABLE_PREFETCHW
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-/* PREFETCHW support flag for use in memory and string routines. */
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-int __x86_prefetchw attribute_hidden;
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-#endif
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-
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static void
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get_common_cache_info (long int *shared_ptr, unsigned int *threads_ptr,
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@@ -765,7 +760,6 @@ __attribute__((constructor))
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init_cacheinfo (void)
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{
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/* Find out what brand of processor. */
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- unsigned int eax;
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unsigned int ebx;
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unsigned int ecx;
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unsigned int edx;
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@@ -846,16 +840,6 @@ init_cacheinfo (void)
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shared += core;
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}
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}
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-
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-#ifndef DISABLE_PREFETCHW
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- if (max_cpuid_ex >= 0x80000001)
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- {
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- __cpuid (0x80000001, eax, ebx, ecx, edx);
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- /* PREFETCHW || 3DNow! */
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- if ((ecx & 0x100) || (edx & 0x80000000))
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- __x86_prefetchw = -1;
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- }
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-#endif
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}
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if (cpu_features->data_cache_size != 0)
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diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
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index d51cf03ac92ebcc2..e3bb45d78811d70f 100644
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--- a/sysdeps/x86_64/Makefile
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+++ b/sysdeps/x86_64/Makefile
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@@ -18,7 +18,7 @@ tests += tst-mallocalign1
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endif
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ifeq ($(subdir),string)
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-sysdep_routines += cacheinfo strcasecmp_l-nonascii strncase_l-nonascii
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+sysdep_routines += strcasecmp_l-nonascii strncase_l-nonascii
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gen-as-const-headers += locale-defines.sym
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endif
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