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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-10-21 15:54:57 -0500 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2021-10-26 16:51:29 -0500 |
| commit | 44829b3ddb64e99e37343a0f25b2c082387d31a5 (patch) | |
| tree | ba9565215210f530296dd4456816fc69f593e542 /sysdeps/unix/sysv/linux/sh | |
| parent | 8438135d3481853e300e1043cfee3946dadb28b3 (diff) | |
| download | glibc-44829b3ddb64e99e37343a0f25b2c082387d31a5.tar.gz glibc-44829b3ddb64e99e37343a0f25b2c082387d31a5.tar.xz glibc-44829b3ddb64e99e37343a0f25b2c082387d31a5.zip | |
String: Add support for __memcmpeq() ABI on all targets
No bug. This commit adds support for __memcmpeq() as a new ABI for all targets. In this commit __memcmpeq() is implemented only as an alias to the corresponding targets memcmp() implementation. __memcmpeq() is added as a new symbol starting with GLIBC_2.35 and defined in string.h with comments explaining its behavior. Basic tests that it is callable and works where added in string/tester.c As discussed in the proposal "Add new ABI '__memcmpeq()' to libc" __memcmpeq() is essentially a reserved namespace for bcmp(). The means is shares the same specifications as memcmp() except the return value for non-equal byte sequences is any non-zero value. This is less strict than memcmp()'s return value specification and can be better optimized when a boolean return is all that is needed. __memcmpeq() is meant to only be called by compilers if they can prove that the return value of a memcmp() call is only used for its boolean value. All tests in string/tester.c passed. As well build succeeds on x86_64-linux-gnu target.
Diffstat (limited to 'sysdeps/unix/sysv/linux/sh')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/be/libc.abilist | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/le/libc.abilist | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/be/libc.abilist b/sysdeps/unix/sysv/linux/sh/be/libc.abilist index dc502f6833..22ce530975 100644 --- a/sysdeps/unix/sysv/linux/sh/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/be/libc.abilist @@ -2603,6 +2603,7 @@ GLIBC_2.34 tss_create F GLIBC_2.34 tss_delete F GLIBC_2.34 tss_get F GLIBC_2.34 tss_set F +GLIBC_2.35 __memcmpeq F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/sh/le/libc.abilist b/sysdeps/unix/sysv/linux/sh/le/libc.abilist index cba1abb556..960df07b83 100644 --- a/sysdeps/unix/sysv/linux/sh/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/le/libc.abilist @@ -2600,6 +2600,7 @@ GLIBC_2.34 tss_create F GLIBC_2.34 tss_delete F GLIBC_2.34 tss_get F GLIBC_2.34 tss_set F +GLIBC_2.35 __memcmpeq F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F |