LoongArch V1.1 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.
The patches are modifications made based on the patch: https://gcc.gnu.org/pipermail/gcc-patches/2023-December/639243.html. Jiahao Xu (5): LoongArch: Add support for LoongArch V1.1 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 disable for divf/sqrtf/rsqrtf when -mrecip is enabled. gcc/config/loongarch/genopts/isa-evolution.in | 1 + gcc/config/loongarch/genopts/loongarch.opt.in | 11 + gcc/config/loongarch/larchintrin.h | 38 +++ gcc/config/loongarch/lasx.md | 89 ++++++- gcc/config/loongarch/lasxintrin.h | 34 +++ gcc/config/loongarch/loongarch-builtins.cc | 66 +++++ gcc/config/loongarch/loongarch-cpucfg-map.h | 1 + gcc/config/loongarch/loongarch-protos.h | 2 + gcc/config/loongarch/loongarch-str.h | 1 + gcc/config/loongarch/loongarch.cc | 252 +++++++++++++++++- gcc/config/loongarch/loongarch.h | 18 ++ gcc/config/loongarch/loongarch.md | 104 ++++++-- gcc/config/loongarch/loongarch.opt | 15 ++ gcc/config/loongarch/lsx.md | 89 ++++++- gcc/config/loongarch/lsxintrin.h | 34 +++ gcc/config/loongarch/predicates.md | 8 + gcc/doc/extend.texi | 18 ++ gcc/doc/invoke.texi | 54 ++++ gcc/testsuite/gcc.target/loongarch/divf.c | 10 + .../loongarch/larch-frecipe-builtin.c | 28 ++ .../gcc.target/loongarch/recip-divf.c | 9 + .../gcc.target/loongarch/recip-sqrtf.c | 23 ++ gcc/testsuite/gcc.target/loongarch/sqrtf.c | 24 ++ .../loongarch/vector/lasx/lasx-divf.c | 13 + .../vector/lasx/lasx-frecipe-builtin.c | 30 +++ .../loongarch/vector/lasx/lasx-recip-divf.c | 12 + .../loongarch/vector/lasx/lasx-recip-sqrtf.c | 28 ++ .../loongarch/vector/lasx/lasx-recip.c | 24 ++ .../loongarch/vector/lasx/lasx-rsqrt.c | 26 ++ .../loongarch/vector/lasx/lasx-sqrtf.c | 29 ++ .../loongarch/vector/lsx/lsx-divf.c | 13 + .../vector/lsx/lsx-frecipe-builtin.c | 30 +++ .../loongarch/vector/lsx/lsx-recip-divf.c | 12 + .../loongarch/vector/lsx/lsx-recip-sqrtf.c | 28 ++ .../loongarch/vector/lsx/lsx-recip.c | 24 ++ .../loongarch/vector/lsx/lsx-rsqrt.c | 26 ++ .../loongarch/vector/lsx/lsx-sqrtf.c | 29 ++ 37 files changed, 1212 insertions(+), 41 deletions(-) create mode 100644 gcc/testsuite/gcc.target/loongarch/divf.c create mode 100644 gcc/testsuite/gcc.target/loongarch/larch-frecipe-builtin.c 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/sqrtf.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-divf.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-frecipe-builtin.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/lasx/lasx-recip.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-rsqrt.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lasx/lasx-sqrtf.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-divf.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-frecipe-builtin.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 create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-recip.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-rsqrt.c create mode 100644 gcc/testsuite/gcc.target/loongarch/vector/lsx/lsx-sqrtf.c -- 2.20.1
