LoongArch V1.1 instructions adds support for approximate instructions, which
are utilized along
with additional Newton-Raphson steps implement single precision floating-point
division, square
root and reciprocal square root operations for better throughput. Control the
generation of
approximate instructions by implementing '-mrecip' and '-mrecip='.
Jiahao Xu (5):
LoongArch: Add support for approximate instructions.
LoongArch: Use standard pattern name for xvfrsqrt/vfrsqrt
instructions.
LoongArch: Redefine pattern for xvfrecip/vfrecip instructions.
LoongArch: New options -mrecip and -mrecip= with ffast-math.
LoongArch: Vectorized loop unrolling is not performed on
divf/sqrtf/rsqrtf with turns on -mrecip.
gcc/config/loongarch/genopts/loongarch.opt.in | 11 +
gcc/config/loongarch/lasx.md | 89 ++++++-
gcc/config/loongarch/lasxintrin.h | 32 +++
gcc/config/loongarch/loongarch-builtins.cc | 32 +++
gcc/config/loongarch/loongarch-protos.h | 2 +
gcc/config/loongarch/loongarch.cc | 252 +++++++++++++++++-
gcc/config/loongarch/loongarch.h | 18 ++
gcc/config/loongarch/loongarch.md | 104 ++++++--
gcc/config/loongarch/loongarch.opt | 11 +
gcc/config/loongarch/lsx.md | 89 ++++++-
gcc/config/loongarch/lsxintrin.h | 32 +++
gcc/config/loongarch/predicates.md | 8 +
gcc/doc/invoke.texi | 52 ++++
.../gcc.target/loongarch/recip-divf.c | 9 +
.../gcc.target/loongarch/recip-sqrtf.c | 23 ++
.../loongarch/vector/lasx/lasx-recip-divf.c | 12 +
.../loongarch/vector/lasx/lasx-recip-sqrtf.c | 28 ++
.../loongarch/vector/lsx/lsx-recip-divf.c | 12 +
.../loongarch/vector/lsx/lsx-recip-sqrtf.c | 28 ++
19 files changed, 803 insertions(+), 41 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/loongarch/recip-divf.c
create mode 100644 gcc/testsuite/gcc.target/loongarch/recip-sqrtf.c
create mode 100644
gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-recip-divf.c
create mode 100644
gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-recip-sqrtf.c
create mode 100644
gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-recip-divf.c
create mode 100644
gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-recip-sqrtf.c
--
2.20.1
