GCC modified for the FreeChainXenon project
29e2bc5f9a
The current built-in definitions for vcmpneb, vcmpneh, vcmpnew are defined
under the Power 9 section of r66000-builtins. This implies they are only
supported on Power 9 and above when in fact they are defined and work with
Altivec as well with the appropriate Altivec instruction generation.
The vec_cmpne builtin should generate the vcmpequ{b,h,w} instruction with
Altivec enabled and generate the vcmpne{b,h,w} on Power 9 and newer
processors.
This patch moves the definitions to the Altivec stanza to make it clear
the built-ins are supported for all Altivec processors. The patch
removes the confusion as to which processors support the vcmpequ{b,h,w}
instructions.
There is existing test coverage for the vec_cmpne built-in for
vector bool char, vector bool short, vector bool int,
vector bool long long in builtins-3-p9.c and p8vector-builtin-2.c.
Coverage for vector signed int, vector unsigned int is in
p8vector-builtin-2.c.
Test vec-cmpne.c is updated to check the generation of the vcmpequ{b,h,w}
instructions for Altivec. A new test vec-cmpne-runnable.c is added to
verify the built-ins work as expected.
Patch has been tested on Power 8 LE/BE, Power 9 LE/BE and Power 10 LE
with no regressions.
gcc/ChangeLog:
* config/rs6000/rs6000-builtins.def (vcmpneb, vcmpneh, vcmpnew):
Move definitions to Altivec stanza.
* config/rs6000/altivec.md (vcmpneb, vcmpneh, vcmpnew): New
define_expand.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/vec-cmpne-runnable.c: New execution test.
* gcc.target/powerpc/vec-cmpne.c (define_test_functions,
execute_test_functions): Move to vec-cmpne.h. Add
scan-assembler-times for vcmpequb, vcmpequh, vcmpequw.
* gcc.target/powerpc/vec-cmpne.h: New include file for vec-cmpne.c
and vec-cmpne-runnable.c. Split define_test_functions definition
into define_test_functions and define_init_verify_functions.
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