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| author | Robin Dapp <rdapp@linux.ibm.com> | 2019-07-08 14:42:49 +0000 |
|---|---|---|
| committer | Robin Dapp <rdapp@gcc.gnu.org> | 2019-07-08 14:42:49 +0000 |
| commit | 5fad9d33e1dacbd754473e441f5e305ba7d3ef6c (patch) | |
| tree | 9cefdcb9fd52e27cabd6c42c0b688464f71fbac0 /gcc | |
| parent | e2839e47894f0b4917ddbd59013071e98f525336 (diff) | |
| download | gcc-5fad9d33e1dacbd754473e441f5e305ba7d3ef6c.zip gcc-5fad9d33e1dacbd754473e441f5e305ba7d3ef6c.tar.gz gcc-5fad9d33e1dacbd754473e441f5e305ba7d3ef6c.tar.bz2 | |
S/390: Define shift_truncation_mask.
Define s390_shift_truncation_mask to allow the optabs optimization
sh = (64 - sh)
-> sh = -sh
for a rotation operation.
gcc/ChangeLog:
2019-07-08 Robin Dapp <rdapp@linux.ibm.com>
* config/s390/s390.c (s390_shift_truncation_mask): Define.
(TARGET_SHIFT_TRUNCATION_MASK): Define.
gcc/testsuite/ChangeLog:
2019-07-08 Robin Dapp <rdapp@linux.ibm.com>
* gcc.target/s390/rotate-truncation-mask.c: New test.
From-SVN: r273237
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/s390/s390.c | 8 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/s390/rotate-truncation-mask.c | 11 |
4 files changed, 28 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c4f0503..b47aead 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2019-07-08 Robin Dapp <rdapp@linux.ibm.com> + * config/s390/s390.c (s390_shift_truncation_mask): Define. + (TARGET_SHIFT_TRUNCATION_MASK): Define. + +2019-07-08 Robin Dapp <rdapp@linux.ibm.com> + * config/s390/constraints.md: Add new jsc constraint. * config/s390/predicates.md: New predicates. * config/s390/s390-protos.h (s390_valid_shift_count): New function. diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index 324d9d2..75b0b5b 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -16412,7 +16412,13 @@ s390_sched_dependencies_evaluation (rtx_insn *head, rtx_insn *tail) add_dependence (r11_restore, r15_restore, REG_DEP_ANTI); } +/* Implement TARGET_SHIFT_TRUNCATION_MASK for integer shifts. */ +static unsigned HOST_WIDE_INT +s390_shift_truncation_mask (machine_mode mode) +{ + return mode == DImode || mode == SImode ? 63 : 0; +} /* Initialize GCC target structure. */ @@ -16709,6 +16715,8 @@ s390_sched_dependencies_evaluation (rtx_insn *head, rtx_insn *tail) #define TARGET_SCHED_DEPENDENCIES_EVALUATION_HOOK \ s390_sched_dependencies_evaluation +#undef TARGET_SHIFT_TRUNCATION_MASK +#define TARGET_SHIFT_TRUNCATION_MASK s390_shift_truncation_mask /* Use only short displacement, since long displacement is not available for the floating point instructions. */ diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index b1c6ea2..a7a67fb9 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,9 @@ 2019-07-08 Robin Dapp <rdapp@linux.ibm.com> + * gcc.target/s390/rotate-truncation-mask.c: New test. + +2019-07-08 Robin Dapp <rdapp@linux.ibm.com> + * gcc.target/s390/combine-rotate-modulo.c: New test. * gcc.target/s390/combine-shift-rotate-add-mod.c: New test. * gcc.target/s390/vector/combine-shift-vec.c: New test. diff --git a/gcc/testsuite/gcc.target/s390/rotate-truncation-mask.c b/gcc/testsuite/gcc.target/s390/rotate-truncation-mask.c new file mode 100644 index 0000000..1cdd209 --- /dev/null +++ b/gcc/testsuite/gcc.target/s390/rotate-truncation-mask.c @@ -0,0 +1,11 @@ +/* Check that we do not use (64 - sh) for rotating. */ + +/* { dg-options "-O1 -m64" } */ + +/* { dg-final { scan-assembler "lcr\t%r.+,%r.+" } } */ +/* { dg-final { scan-assembler-not "lhi\t%r.+,64" } } */ +/* { dg-final { scan-assembler-not "sr\t%r.+,%r.+" } } */ +unsigned long rotr (unsigned long in, unsigned long sh) +{ + return (in >> sh) | (in << (64 - sh)); +} |