From: MITSUNARI Shigeo <[email protected]>
Changes since v5:
- Use GET_MODE_2XWIDER_MODE instead of GET_MODE_WIDER_MODE in [1/2]
to ensure the widened mode is exactly double the original mode,
avoiding any in-between modes (suggested by Georg-Johann Lay).
- [2/2] is unchanged from v5.
MITSUNARI Shigeo (2):
expmed: Optimize 32-bit unsigned division by constants on 64-bit
targets
i386: Add BMI2 MULX pattern for highpart-only multiplication
gcc/config/i386/i386.md | 15 +++
gcc/expmed.cc | 93 +++++++++++++------
.../gcc.target/i386/bmi2-mulx-highpart-1.c | 18 ++++
.../gcc.target/i386/bmi2-mulx-highpart-2.c | 19 ++++
gcc/testsuite/gcc.target/i386/mulq-highpart.c | 19 ++++
5 files changed, 137 insertions(+), 27 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/i386/bmi2-mulx-highpart-1.c
create mode 100644 gcc/testsuite/gcc.target/i386/bmi2-mulx-highpart-2.c
create mode 100644 gcc/testsuite/gcc.target/i386/mulq-highpart.c
--
2.43.0
