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author | Michael Meissner <meissner@linux.ibm.com> | 2020-06-09 15:32:52 -0500 |
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committer | Michael Meissner <meissner@linux.ibm.com> | 2020-06-09 15:32:52 -0500 |
commit | 2753f2f8b4a4534ab364595ba4b8a913cc7254a7 (patch) | |
tree | 714527389d0d6d26c2d3f47527bea1f2034427fa | |
parent | 7ba33e898fa4a097c0f2b4d9cae35041a5933f9c (diff) | |
download | gcc-2753f2f8b4a4534ab364595ba4b8a913cc7254a7.zip gcc-2753f2f8b4a4534ab364595ba4b8a913cc7254a7.tar.gz gcc-2753f2f8b4a4534ab364595ba4b8a913cc7254a7.tar.bz2 |
PowerPC: Add future hwcap2 bits
This patch adds support for the two new HWCAP2 fields used by the
__builtin_cpu_supports function. It adds support in the target_clones
attribute for -mcpu=future.
The two new __builtin_cpu_supports tests are:
__builtin_cpu_supports ("isa_3_1")
__builtin_cpu_supports ("mma")
The bits used are the bits that the Linux kernel engineers will be using for
these new features.
testsuite/
2020-06-05 Michael Meissner <meissner@linux.ibm.com>
* gcc.target/powerpc/clone3.c: New test for using 'future' with
the target_clones attribute.
-rw-r--r-- | gcc/testsuite/gcc.target/powerpc/clone3.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/powerpc/clone3.c b/gcc/testsuite/gcc.target/powerpc/clone3.c new file mode 100644 index 0000000..93ee41d --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/clone3.c @@ -0,0 +1,33 @@ +/* { dg-do compile { target { powerpc*-*-linux* && lp64 } } } */ +/* { dg-options "-mdejagnu-cpu=power8 -O2" } */ +/* { dg-require-effective-target powerpc_pcrel } */ +/* { dg-require-effective-target ppc_cpu_supports_hw } */ + +/* Power9 (aka, ISA 3.0) has a MODSD instruction to do modulus, while Power8 + (aka, ISA 2.07) has to do modulus with divide and multiply. Make sure + both clone functions are generated. + + FUTURE has pc-relative instructions to access static values, while earlier + systems used TOC addressing. + + Restrict ourselves to Linux, since IFUNC might not be supported in other + operating systems. */ + +static long s; +long *p = &s; + +__attribute__((target_clones("cpu=future,cpu=power9,default"))) +long mod_func (long a, long b) +{ + return (a % b) + s; +} + +long mod_func_or (long a, long b, long c) +{ + return mod_func (a, b) | c; +} + +/* { dg-final { scan-assembler-times {\mdivd\M} 1 } } */ +/* { dg-final { scan-assembler-times {\mmulld\M} 1 } } */ +/* { dg-final { scan-assembler-times {\mmodsd\M} 2 } } */ +/* { dg-final { scan-assembler-times {\mpld\M} 1 } } */ |