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| author | kelvin <kelvin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-05-11 14:13:31 +0000 |
|---|---|---|
| committer | kelvin <kelvin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2017-05-11 14:13:31 +0000 |
| commit | 9534dff5d1babc35677eba8c04e9f93d305ed88c (patch) | |
| tree | 650ce85d5076fced2e6e671c2ff13a4c72a6ea00 /gcc/doc/extend.texi | |
| parent | 73eaf82ab9cdddcca0116229c184e0335c585ea1 (diff) | |
| download | gcc-9534dff5d1babc35677eba8c04e9f93d305ed88c.tar.gz | |
gcc/testsuite/ChangeLog:
2017-05-11 Kelvin Nilsen <kelvin@gcc.gnu.org>
* gcc.target/powerpc/cmpb-1.c: New test.
* gcc.target/powerpc/cmpb-2.c: New test.
* gcc.target/powerpc/cmpb-3.c: New test.
* gcc.target/powerpc/cmpb32-1.c: New test.
* gcc.target/powerpc/cmpb32-2.c: New test.
gcc/ChangeLog:
2017-05-11 Kelvin Nilsen <kelvin@gcc.gnu.org>
* config/rs6000/rs6000-c.c (altivec_overloaded_builtins): Add
array entries to represent two legal parameterizations of the
overloaded __builtin_cmpb function, as represented by the
P6_OV_BUILTIN_CMPB constant.
(altivec_resolve_overloaded_builtin): Add special case handling
for the __builtin_cmpb function, as represented by the
P6_OV_BUILTIN_CMPB constant.
* config/rs6000/rs6000-builtin.def (BU_P6_2): New macro.
(BU_P6_64BIT_2): New macro.
(BU_P6_OVERLOAD_2): New macro
(CMPB_32): Add 32-bit compare-bytes support for 32-bit only targets.
(CMPB): Add 64-bit compare-bytes support for 32-bit and 64-bit targets.
(CMPB): Add overload support to represent both 32-bit and 64-bit
compare-bytes function.
* config/rs6000/rs6000.c (rs6000_builtin_mask_calculate): Add
support for TARGET_CMPB.
* config/rs6000/rs6000.h: Add support for RS6000_BTM_CMPB.
* doc/extend.texi (PowerPC AltiVec Built-in Functions): Add
documentation of the __builtin_cmpb overloaded built-in function.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@247907 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc/extend.texi')
| -rw-r--r-- | gcc/doc/extend.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index f2b304211eb..a16396155ef 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -15107,6 +15107,24 @@ Similar to @code{__builtin_nans}, except the return type is @code{__float128}. @end table The following built-in functions are available for the PowerPC family +of processors, starting with ISA 2.05 or later (@option{-mcpu=power6} +or @option{-mcmpb}): +@smallexample +unsigned long long __builtin_cmpb (unsigned long long int, unsigned long long int); +unsigned int __builtin_cmpb (unsigned int, unsigned int); +@end smallexample + +The @code{__builtin_cmpb} function +performs a byte-wise compare on the contents of its two arguments, +returning the result of the byte-wise comparison as the returned +value. For each byte comparison, the corresponding byte of the return +value holds 0xff if the input bytes are equal and 0 if the input bytes +are not equal. If either of the arguments to this built-in function +is wider than 32 bits, the function call expands into the form that +expects @code{unsigned long long int} arguments +which is only available on 64-bit targets. + +The following built-in functions are available for the PowerPC family of processors, starting with ISA 2.06 or later (@option{-mcpu=power7} or @option{-mpopcntd}): @smallexample |