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authorPan Li <pan2.li@intel.com>2023-08-25 09:37:00 +0800
committerPan Li <pan2.li@intel.com>2023-08-31 23:31:56 +0800
commitaf0c625f6085567522cf55b2ced05f07ec7be67a (patch)
tree1d2abcfc2a5146319fdc306eecec6a5ead1f2116 /gcc/c-family
parenta7cefeaead68e5d89f65ba3a558eddef9b0b0f75 (diff)
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RISC-V: Support rounding mode for VFNMADD/VFNMACC autovec
There will be a case like below for intrinsic and autovec combination. vfadd RTZ <- intrinisc static rounding vfnmadd <- autovec/autovec-opt The autovec generated vfnmadd should take DYN mode, and the frm must be restored before the vfnmadd insn. This patch would like to fix this issue by: * Add the frm operand to the autovec/autovec-opt pattern. * Set the frm_mode attr to DYN. Thus, the frm flow when combine autovec and intrinsic should be. +------------ | frrm a5 | ... | fsrmi 4 | vfadd <- intrinsic static rounding. | ... | fsrm a5 | vfnmadd <- autovec/autovec-opt | ... +------------ Signed-off-by: Pan Li <pan2.li@intel.com> gcc/ChangeLog: * config/riscv/autovec-opt.md: Add FRM_REGNUM to vfnmadd/vfnmacc. * config/riscv/autovec.md: Ditto. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/base/float-point-frm-autovec-4.c: New test.
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