Remove the error handling wrapper from log2

Introduce new log2 symbol version that doesn't do SVID compatible error handling. The standard errno and fp exception based error handling is inline in the new code and does not have significant overhead. The wrapper is disabled for sysdeps/ieee754/dbl-64 by using empty w_log2.c and enabled for targets with their own log2 implementation by including math/w_log2.c. The compatibility symbol version still uses the wrapper with SVID error handling around the new code. There is no new symbol version nor compatibility code on !LIBM_SVID_COMPAT targets (e.g. riscv). On targets where previously log2l was an alias of log2, now it points to the compatibility symbol with the wrapper, because it still need the SVID compatible error handling. This affects NO_LONG_DOUBLE (e.g. arm) and LONG_DOUBLE_COMPAT (e.g. alpha) targets as well. The __log2_finite symbol is now an alias of log2. Both __log2_finite and log2 set errno and thus not const functions. The ia64 asm is changed so the compat and new symbol versions map to the same address. Tested with build-many-glibcs.py. * math/Versions (GLIBC_2.29): Add log2. * math/w_log2_compat.c (__log2_compat): Change to versioned compat symbol. * math/w_log2.c: New file. * sysdeps/i386/fpu/w_log2.c: New file. * sysdeps/ia64/fpu/e_log2.S: Add versioned symbols. * sysdeps/ieee754/dbl-64/e_log2.c (__ieee754_log2): Rename to __log2 and add necessary aliases. * sysdeps/ieee754/dbl-64/w_log2.c: New file. * sysdeps/m68k/m680x0/fpu/w_log2.c: New file. * sysdeps/mach/hurd/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/aarch64/libm.abilist: Update. * sysdeps/unix/sysv/linux/alpha/libm.abilist: Update. * sysdeps/unix/sysv/linux/arm/libm.abilist: Update. * sysdeps/unix/sysv/linux/hppa/libm.abilist: Update. * sysdeps/unix/sysv/linux/i386/libm.abilist: Update. * sysdeps/unix/sysv/linux/ia64/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Update. * sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Update. * sysdeps/unix/sysv/linux/microblaze/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Update. * sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Update. * sysdeps/unix/sysv/linux/nios2/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Update. * sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Update. * sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Update. * sysdeps/unix/sysv/linux/sh/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Update. * sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Update. * sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Update.
author: Szabolcs Nagy <szabolcs.nagy@arm.com> 2018-06-27 16:29:24 +0100
committer: Szabolcs Nagy <szabolcs.nagy@arm.com> 2018-11-21 09:57:21 +0000
commit: 718d6542f2c0e4c8ec65453c1df6612768d6ef00 (patch)
tree: 9b42514c60e10fea89b15fe792c5c3bdf54b26d0 /sysdeps/unix/sysv
parent: f29b7c492d8a06581cf1b573b7e5907daa8c139c (diff)
download: glibc-718d6542f2c0e4c8ec65453c1df6612768d6ef00.zip
glibc-718d6542f2c0e4c8ec65453c1df6612768d6ef00.tar.gz
glibc-718d6542f2c0e4c8ec65453c1df6612768d6ef00.tar.bz2
23 files changed, 23 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/libm.abilist b/sysdeps/unix/sysv/linux/aarch64/libm.abilist
index 6785ac6..c01ff24 100644
--- a/sysdeps/unix/sysv/linux/aarch64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/aarch64/libm.abilist
@@ -1035,3 +1035,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/alpha/libm.abilist b/sysdeps/unix/sysv/linux/alpha/libm.abilist
index 132ea00..f5ec874 100644
--- a/sysdeps/unix/sysv/linux/alpha/libm.abilist
+++ b/sysdeps/unix/sysv/linux/alpha/libm.abilist
@@ -1046,6 +1046,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.3.4 __c1_cabsf F
 GLIBC_2.3.4 __c1_cacosf F
 GLIBC_2.3.4 __c1_cacoshf F
diff --git a/sysdeps/unix/sysv/linux/arm/libm.abilist b/sysdeps/unix/sysv/linux/arm/libm.abilist
index 45a2337..9b7d87b 100644
--- a/sysdeps/unix/sysv/linux/arm/libm.abilist
+++ b/sysdeps/unix/sysv/linux/arm/libm.abilist
@@ -456,6 +456,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 _LIB_VERSION D 0x4
 GLIBC_2.4 __clog10 F
 GLIBC_2.4 __clog10f F
diff --git a/sysdeps/unix/sysv/linux/hppa/libm.abilist b/sysdeps/unix/sysv/linux/hppa/libm.abilist
index b0689ff..d193f99 100644
--- a/sysdeps/unix/sysv/linux/hppa/libm.abilist
+++ b/sysdeps/unix/sysv/linux/hppa/libm.abilist
@@ -767,4 +767,5 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 exp2l F
diff --git a/sysdeps/unix/sysv/linux/i386/libm.abilist b/sysdeps/unix/sysv/linux/i386/libm.abilist
index 3afd304..eae2c55 100644
--- a/sysdeps/unix/sysv/linux/i386/libm.abilist
+++ b/sysdeps/unix/sysv/linux/i386/libm.abilist
@@ -1078,3 +1078,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/ia64/libm.abilist b/sysdeps/unix/sysv/linux/ia64/libm.abilist
index 637fd15..9796e8d 100644
--- a/sysdeps/unix/sysv/linux/ia64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/ia64/libm.abilist
@@ -1008,3 +1008,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist
index 45a2337..9b7d87b 100644
--- a/sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist
@@ -456,6 +456,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 _LIB_VERSION D 0x4
 GLIBC_2.4 __clog10 F
 GLIBC_2.4 __clog10f F
diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist
index b1689c2..f73ad1a 100644
--- a/sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist
+++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist
@@ -807,3 +807,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/microblaze/libm.abilist b/sysdeps/unix/sysv/linux/microblaze/libm.abilist
index ae59dfb..dcb7dbb 100644
--- a/sysdeps/unix/sysv/linux/microblaze/libm.abilist
+++ b/sysdeps/unix/sysv/linux/microblaze/libm.abilist
@@ -768,3 +768,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/mips/mips32/libm.abilist b/sysdeps/unix/sysv/linux/mips/mips32/libm.abilist
index 38c6651..1146e2d 100644
--- a/sysdeps/unix/sysv/linux/mips/mips32/libm.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips32/libm.abilist
@@ -767,4 +767,5 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 exp2l F
diff --git a/sysdeps/unix/sysv/linux/mips/mips64/libm.abilist b/sysdeps/unix/sysv/linux/mips/mips64/libm.abilist
index 09777c7..d9c830d 100644
--- a/sysdeps/unix/sysv/linux/mips/mips64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/mips/mips64/libm.abilist
@@ -1035,3 +1035,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/nios2/libm.abilist b/sysdeps/unix/sysv/linux/nios2/libm.abilist
index 59fc049..0902ca0 100644
--- a/sysdeps/unix/sysv/linux/nios2/libm.abilist
+++ b/sysdeps/unix/sysv/linux/nios2/libm.abilist
@@ -768,3 +768,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist
index 7788f76..3e9e5e7 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist
@@ -813,6 +813,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 __clog10l F
 GLIBC_2.4 __finitel F
 GLIBC_2.4 __fpclassifyl F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist
index cae3604..7a3c6be 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist
@@ -812,6 +812,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 __clog10l F
 GLIBC_2.4 __finitel F
 GLIBC_2.4 __fpclassifyl F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist
index 732825e..d50c82c 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist
@@ -1079,3 +1079,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist
index 59f083d..cbf2ad3 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist
@@ -491,6 +491,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.3 _LIB_VERSION D 0x4
 GLIBC_2.3 __clog10 F
 GLIBC_2.3 __clog10f F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist
index 5a68b27..382455c 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist
@@ -1036,6 +1036,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 __clog10l F
 GLIBC_2.4 __finitel F
 GLIBC_2.4 __fpclassifyl F
diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist
index 364f7e6..92b794b 100644
--- a/sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist
@@ -1036,6 +1036,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 __clog10l F
 GLIBC_2.4 __finitel F
 GLIBC_2.4 __fpclassifyl F
diff --git a/sysdeps/unix/sysv/linux/sh/libm.abilist b/sysdeps/unix/sysv/linux/sh/libm.abilist
index 489f34d..3320f14 100644
--- a/sysdeps/unix/sysv/linux/sh/libm.abilist
+++ b/sysdeps/unix/sysv/linux/sh/libm.abilist
@@ -767,4 +767,5 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 exp2l F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist
index 288986f..2a10a0f 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist
@@ -1043,6 +1043,7 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
 GLIBC_2.4 __clog10l F
 GLIBC_2.4 __finitel F
 GLIBC_2.4 __fpclassifyl F
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist
index 11fb7e4..ebbc58d 100644
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist
@@ -1035,3 +1035,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libm.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libm.abilist
index 9fd399d..3e02619 100644
--- a/sysdeps/unix/sysv/linux/x86_64/64/libm.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/64/libm.abilist
@@ -1069,3 +1069,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist
index bbea575..03cd62f 100644
--- a/sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist
@@ -1069,3 +1069,4 @@ GLIBC_2.28 fsubl F
 GLIBC_2.29 exp F
 GLIBC_2.29 exp2 F
 GLIBC_2.29 log F
+GLIBC_2.29 log2 F
author	Szabolcs Nagy <szabolcs.nagy@arm.com>	2018-06-27 16:29:24 +0100
committer	Szabolcs Nagy <szabolcs.nagy@arm.com>	2018-11-21 09:57:21 +0000
commit	718d6542f2c0e4c8ec65453c1df6612768d6ef00 (patch)
tree	9b42514c60e10fea89b15fe792c5c3bdf54b26d0 /sysdeps/unix/sysv
parent	f29b7c492d8a06581cf1b573b7e5907daa8c139c (diff)
download	glibc-718d6542f2c0e4c8ec65453c1df6612768d6ef00.zip glibc-718d6542f2c0e4c8ec65453c1df6612768d6ef00.tar.gz glibc-718d6542f2c0e4c8ec65453c1df6612768d6ef00.tar.bz2