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glibc/sysdeps/x86_64
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Florian Weimer e88b9f0e5c stdio-common: Convert vfprintf and related functions to buffers 
vfprintf is entangled with vfwprintf (of course), __printf_fp,
__printf_fphex, __vstrfmon_l_internal, and the strfrom family of
functions.  The latter use the internal snprintf functionality,
so vsnprintf is converted as well.

The simples conversion is __printf_fphex, followed by
__vstrfmon_l_internal and __printf_fp, and finally
__vfprintf_internal and __vfwprintf_internal.  __vsnprintf_internal
and strfrom* are mostly consuming the new interfaces, so they
are comparatively simple.

__printf_fp is a public symbol, so the FILE *-based interface
had to preserved.

The __printf_fp rewrite does not change the actual binary-to-decimal
conversion algorithm, and digits are still not emitted directly to
the target buffer.  However, the staging buffer now uses bytes
instead of wide characters, and one buffer copy is eliminated.

The changes are at least performance-neutral in my testing.
Floating point printing and snprintf improved measurably, so that
this Lua script

  for i=1,5000000 do
      print(i, i * math.pi)
  end

runs about 5% faster for me.  To preserve fprintf performance for
a simple "%d" format, this commit has some logic changes under
LABEL (unsigned_number) to avoid additional function calls.  There
are certainly some very easy performance improvements here: binary,
octal and hexadecimal formatting can easily avoid the temporary work
buffer (the number of digits can be computed ahead-of-time using one
of the __builtin_clz* built-ins). Decimal formatting can use a
specialized version of _itoa_word for base 10.

The existing (inconsistent) width handling between strfmon and printf
is preserved here.  __print_fp_buffer_1 would have to use
__translated_number_width to achieve ISO conformance for printf.

Test expectations in libio/tst-vtables-common.c are adjusted because
the internal staging buffer merges all virtual function calls into
one.

In general, stack buffer usage is greatly reduced, particularly for
unbuffered input streams.  __printf_fp can still use a large buffer
in binary128 mode for %g, though.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-12-19 18:56:54 +01:00
..
64 Move architecture shlib-versions files to Linux-specific directories. 2014-07-17 14:31:12 +00:00
fpu stdio-common: Convert vfprintf and related functions to buffers 2022-12-19 18:56:54 +01:00
multiarch x86: Prevent SIGSEGV in memcmp-sse2 when data is concurrently modified [BZ #29863] 2022-12-15 09:09:35 -08:00
nptl elf: Introduce <dl-call_tls_init_tp.h> and call_tls_init_tp (bug 29249) 2022-11-03 17:28:03 +01:00
x32 x86-64 strncat: Properly handle the length parameter [BZ# 24097] 2022-12-02 08:18:10 -08:00
____longjmp_chk.S ____longjmp_chk is now OS-specific. 2009-07-30 21:42:27 -07:00
__longjmp.S Introduce <pointer_guard.h>, extracted from <sysdep.h> 2022-10-18 17:03:55 +02:00
_mcount.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
abort-instr.h
add_n.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
addmul_1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
bsd-_setjmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
bsd-setjmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
configure x86/configure.ac: Define PI_STATIC_AND_HIDDEN/SUPPORT_STATIC_PIE 2022-02-14 07:34:54 -08:00
configure.ac x86/configure.ac: Define PI_STATIC_AND_HIDDEN/SUPPORT_STATIC_PIE 2022-02-14 07:34:54 -08:00
crti.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
crtn.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-hwcaps-subdirs.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-irel.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-machine.h x86-64: Only define used SSE/AVX/AVX512 run-time resolvers 2022-06-27 14:17:52 -07:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-runtime.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tls.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tls.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tlsdesc.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tlsdesc.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-trampoline.h x86-64: Small improvements to dl-trampoline.S 2022-06-29 19:47:52 -07:00
dl-trampoline.S x86-64: Small improvements to dl-trampoline.S 2022-06-29 19:47:52 -07:00
ffs.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ffsll.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifuncmain8.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifuncmod8.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
Implies Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
isa-default-impl.h x86: Remove faulty sanity tests for RTLD build with no multiarch 2022-06-23 11:14:08 -07:00
isa.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
jmpbuf-unwind.h Use PTR_MANGLE and PTR_DEMANGLE unconditionally in C sources 2022-10-18 17:04:10 +02:00
l10nflist.c Minor optimization of popcount in l10nflist 2011-08-11 14:07:04 -04:00
link-defines.sym elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) 2021-10-11 11:14:02 -07:00
locale-defines.sym Implement optimized strcaecmp for x86-64. 2010-07-30 00:14:04 -07:00
localplt.data elf: Rework exception handling in the dynamic loader [BZ #25486] 2022-11-03 09:39:31 +01:00
lshift.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
machine-gmon.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
Makefile x86: Add evex optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
memchr.S x86: Add support for compiling {raw|w}memchr with high ISA level 2022-06-22 19:41:35 -07:00
memcmp-isa-default-impl.h x86: Add support for building {w}memcmp{eq} with explicit ISA level 2022-07-05 16:42:42 -07:00
memcmp.S x86: Add support for building {w}memcmp{eq} with explicit ISA level 2022-07-05 16:42:42 -07:00
memcmpeq.S x86: Add support for building {w}memcmp{eq} with explicit ISA level 2022-07-05 16:42:42 -07:00
memcpy_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memcpy.S X86-64: Remove previous default/SSE2/AVX2 memcpy/memmove 2016-06-08 13:58:08 -07:00
memmove_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memmove.S x86: Add support for building {w}memmove{_chk} with explicit ISA level 2022-07-05 16:42:42 -07:00
mempcpy_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
mempcpy.S X86-64: Remove previous default/SSE2/AVX2 memcpy/memmove 2016-06-08 13:58:08 -07:00
memrchr.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
memset_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memset.S x86: Add support for building {w}memset{_chk} with explicit ISA level 2022-07-05 16:42:42 -07:00
mp_clz_tab.c * sysdeps/x86_64/mp_clz_tab.c: New file. 2009-04-15 04:30:41 +00:00
mul_1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
preconfigure rename configure.in to configure.ac 2013-10-30 17:32:08 +10:00
preconfigure.ac rename configure.in to configure.ac 2013-10-30 17:32:08 +10:00
rawmemchr.S x86: Add support for compiling {raw|w}memchr with high ISA level 2022-06-22 19:41:35 -07:00
rshift.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
rtld-offsets.sym x86-64: Align the stack in __tls_get_addr [BZ #21609] 2017-07-06 04:43:20 -07:00
setjmp.S Introduce <pointer_guard.h>, extracted from <sysdep.h> 2022-10-18 17:03:55 +02:00
stackguard-macros.h BZ #15754: CVE-2013-4788 2013-09-23 00:52:09 -04:00
stackinfo.h nptl: x86_64: Use same code for CURRENT_STACK_FRAME and stackinfo_get_sp 2022-08-31 09:04:27 -03:00
start.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
stpcpy.S x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 2022-07-16 03:07:59 -07:00
stpncpy.S x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 2022-07-16 03:07:59 -07:00
strcasecmp_l-nonascii.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strcasecmp_l.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strcasecmp.S Implement optimized strcaecmp for x86-64. 2010-07-30 00:14:04 -07:00
strcat.S x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 2022-07-16 03:07:59 -07:00
strchr-isa-default-impl.h x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strchr.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strchrnul.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strcmp.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strcpy.S x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 2022-07-16 03:07:59 -07:00
strcspn-generic.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
strcspn.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
strlen.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strncase_l-nonascii.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strncase_l.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strncase.S Add optimized strncasecmp versions for x86-64. 2010-08-14 22:04:01 -07:00
strncat.S x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 2022-07-16 03:07:59 -07:00
strncmp.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strncpy.S x86: Add support to build st{p|r}{n}{cpy|cat} with explicit ISA level 2022-07-16 03:07:59 -07:00
strnlen.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strpbrk-generic.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
strpbrk.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
strrchr.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
strspn-generic.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
strspn.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
sub_n.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
submul_1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
sysdep.h x86-64: Move LP_SIZE definition to its own header 2022-10-18 17:02:08 +02:00
tls_get_addr.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tlsdesc.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tlsdesc.sym x86-64: Align the stack in __tls_get_addr [BZ #21609] 2017-07-06 04:43:20 -07:00
tst-audit3.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-audit4-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit4.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit5.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-audit6.c Modify several tests to use test-skeleton.c 2015-07-15 15:10:23 +05:30
tst-audit7.c Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
tst-audit10-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit10.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-auditmod3a.c Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
tst-auditmod3b.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-auditmod4a.c Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
tst-auditmod4b.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-auditmod5a.c Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
tst-auditmod5b.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-auditmod6a.c Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
tst-auditmod6b.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-auditmod6c.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-auditmod7a.c Move x86_64-specific audit tests to sysdeps/x86_64/. 2013-04-25 19:23:11 +00:00
tst-auditmod7b.c Add missing header files throughout the testsuite. 2017-02-16 17:33:18 -05:00
tst-auditmod10a.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-auditmod10b.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx512-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx512.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx512mod.c x86-64: Verify that _dl_runtime_resolve preserves vector registers 2017-02-09 12:19:58 -08:00
tst-avx-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avxmod.c x86-64: Verify that _dl_runtime_resolve preserves vector registers 2017-02-09 12:19:58 -08:00
tst-glibc-hwcaps.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-platform-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-platformmod-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-platformmod-2.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quad1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quad1pie.c Handle R_X86_64_RELATIVE64 and R_X86_64_64 for x32 2012-05-10 17:05:06 -07:00
tst-quad2.c Handle R_X86_64_RELATIVE64 and R_X86_64_64 for x32 2012-05-10 17:05:06 -07:00
tst-quad2pie.c Handle R_X86_64_RELATIVE64 and R_X86_64_64 for x32 2012-05-10 17:05:06 -07:00
tst-quadmod1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quadmod1pie.S Handle R_X86_64_RELATIVE64 and R_X86_64_64 for x32 2012-05-10 17:05:06 -07:00
tst-quadmod2.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quadmod2pie.S Handle R_X86_64_RELATIVE64 and R_X86_64_64 for x32 2012-05-10 17:05:06 -07:00
tst-rsi-strlen.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-rsi-wcslen.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-split-dynreloc.c Fix dynamic linker issue with bind-now 2015-08-19 05:37:01 -07:00
tst-split-dynreloc.lds Fix dynamic linker issue with bind-now 2015-08-19 05:37:01 -07:00
tst-sse.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-ssemod.c x86-64: Verify that _dl_runtime_resolve preserves vector registers 2017-02-09 12:19:58 -08:00
tst-x86-64-tls-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
varshift.c x86: Add support for building str{c|p}{brk|spn} with explicit ISA level 2022-07-05 16:42:42 -07:00
Versions Move __fentry__ version definition to sysdeps/{i386,x86_64} 2018-08-10 09:07:44 +02:00
wcpcpy-generic.c x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcpcpy.S x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcpncpy-generic.c x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcpncpy.S x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcscat-generic.c x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcscat.S x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcschr.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcscmp.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcscpy-generic.c x86: Add support to build wcscpy with explicit ISA level 2022-07-16 03:07:59 -07:00
wcscpy.S x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcslen.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcsncat-generic.c x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcsncat.S x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcsncmp-generic.c x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcsncmp.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcsncpy-generic.c x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcsncpy.S x86: Add avx2 optimized functions for the wchar_t strcpy family 2022-11-08 19:22:33 -08:00
wcsnlen-generic.c x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcsnlen.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wcsrchr.S x86: Add support to build strcmp/strlen/strchr with explicit ISA level 2022-07-16 03:07:59 -07:00
wmemchr.S x86: Add support for compiling {raw|w}memchr with high ISA level 2022-06-22 19:41:35 -07:00
wmemcmp.S x86: Add support for building {w}memcmp{eq} with explicit ISA level 2022-07-05 16:42:42 -07:00
wmemset_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
wmemset.S x86-64: Optimize wmemset with SSE2/AVX2/AVX512 2017-06-05 11:09:59 -07:00
wordcopy.c X86-64: Add dummy memcopy.h and wordcopy.c 2016-06-09 04:38:34 -07:00
x86-lp_size.h x86-64: Move LP_SIZE definition to its own header 2022-10-18 17:02:08 +02:00