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glibc/sysdeps/x86_64
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H.J. Lu 7e681561a3 x86-64: Compile branred.c with -mprefer-vector-width=128 [BZ #24603] 
When compiled with -O3 and AVX, GCC 8 and 9 optimize some loops in
sysdeps/ieee754/dbl-64/branred.c with 256-bit vector instructions,
which leads to store forward stall:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90579

There is no easy fix in compiler.  This patch limits vector width to
128 bits to work around this issue.  It improves performance of sin
and cos by more than 40% on Skylake compiled with -O3 -march=skylake.

Tested with GCC 7/8/9 on x86-64.

	[BZ #24603]
	* sysdeps/x86_64/configure.ac: Check if -mprefer-vector-width=128
	works.
	* sysdeps/x86_64/configure: Regenerated.
	* sysdeps/x86_64/fpu/Makefile (CFLAGS-branred.c): New.  Set
	to -mprefer-vector-width=128 if supported.
2019-07-24 14:48:43 -07:00
..
64
fpu x86-64: Compile branred.c with -mprefer-vector-width=128 [BZ #24603] 2019-07-24 14:48:43 -07:00
multiarch wcsmbs: optimize wcscat 2019-02-27 10:00:37 -03:00
nptl x86_64: Remove wrong THREAD_ATOMIC_* macros 2019-01-03 18:38:14 -02:00
x32 x86-64 memcmp: Use unsigned Jcc instructions on size [BZ #24155] 2019-02-04 06:31:13 -08:00
____longjmp_chk.S
__longjmp.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
_mcount.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
abort-instr.h
add_n.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
addmul_1.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
bsd-_setjmp.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
bsd-setjmp.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
bzero.S
configure x86-64: Compile branred.c with -mprefer-vector-width=128 [BZ #24603] 2019-07-24 14:48:43 -07:00
configure.ac x86-64: Compile branred.c with -mprefer-vector-width=128 [BZ #24603] 2019-07-24 14:48:43 -07:00
crti.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
crtn.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-irel.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-machine.h Add fall-through comments. 2019-02-12 10:30:34 +00:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-runtime.c
dl-tls.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-tls.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-tlsdesc.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-tlsdesc.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-trampoline.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-trampoline.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ffsll.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
htonl.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ifuncmain8.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ifuncmod8.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
Implies
isa.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
l10nflist.c
ldbl2mpn.c
link-defines.sym
locale-defines.sym
localplt.data ld.so: Introduce struct dl_exception 2017-08-10 16:54:57 +02:00
lshift.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
Makefile Rename the glibc.tune namespace to glibc.cpu 2018-08-02 23:49:19 +05:30
memchr.S x86-64 memchr/wmemchr: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:24:13 -08:00
memcmp.S x86-64 memcmp: Use unsigned Jcc instructions on size [BZ #24155] 2019-02-04 06:31:13 -08:00
memcopy.h
memcpy_chk.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
memcpy.S
memmove_chk.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
memmove.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
mempcpy_chk.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
mempcpy.S
memrchr.S x86-64 memrchr: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:30:12 -08:00
memset_chk.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
memset.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
memusage.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
mp_clz_tab.c
mul_1.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
preconfigure
preconfigure.ac
rawmemchr.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
rshift.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
rtld-offsets.sym
sched_cpucount.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
setjmp.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
stack-aliasing.h
stackguard-macros.h
stackinfo.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
start.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
stpcpy.S
strcasecmp_l-nonascii.c
strcasecmp_l.S
strcasecmp.S
strcat.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
strchr.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
strchrnul.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
strcmp.S x86-64 strncmp family: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:34:04 -08:00
strcpy.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
strcspn.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
strlen.S x86-64 strnlen/wcsnlen: Properly handle the length parameter [BZ# 24097] 2019-01-21 11:36:47 -08:00
strncase_l-nonascii.c
strncase_l.S
strncase.S
strncmp.S
strnlen.S
strpbrk.S
strrchr.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
strspn.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sub_n.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
submul_1.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sysdep.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tls_get_addr.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tls-macros.h
tlsdesc.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tlsdesc.sym
tst-audit3.c
tst-audit4-aux.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-audit4.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-audit5.c
tst-audit6.c
tst-audit7.c
tst-audit10-aux.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-audit10.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-audit.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-auditmod3a.c
tst-auditmod3b.c
tst-auditmod4a.c
tst-auditmod4b.c
tst-auditmod5a.c
tst-auditmod5b.c
tst-auditmod6a.c
tst-auditmod6b.c
tst-auditmod6c.c
tst-auditmod7a.c
tst-auditmod7b.c
tst-auditmod10a.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-auditmod10b.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-avx512-aux.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-avx512.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-avx512mod.c
tst-avx-aux.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-avx.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-avxmod.c
tst-mallocalign1.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-platform-1.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-platformmod-1.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-platformmod-2.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-quad1.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-quad1pie.c
tst-quad2.c
tst-quad2pie.c
tst-quadmod1.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-quadmod1pie.S
tst-quadmod2.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-quadmod2pie.S
tst-split-dynreloc.c
tst-split-dynreloc.lds
tst-sse.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-ssemod.c
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-x86_64-1.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tst-x86_64mod-1.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
Versions Move __fentry__ version definition to sysdeps/{i386,x86_64} 2018-08-10 09:07:44 +02:00
wcschr.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wcscmp.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wcslen.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wcsrchr.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wmemset_chk.S Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wmemset.S
wordcopy.c