https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111023
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Uros Bizjak <u...@gcc.gnu.org>: https://gcc.gnu.org/g:4123b5609da53c8f8ac01c90aef127ad6375e9df commit r14-3327-g4123b5609da53c8f8ac01c90aef127ad6375e9df Author: Uros Bizjak <ubiz...@gmail.com> Date: Fri Aug 18 19:06:38 2023 +0200 i386: Use PUNPCKL?? to implement vector extend and zero_extend for TARGET_SSE2. Implement vector extend and zero_extend functionality for TARGET_SSE2 using PUNPCKL?? family of instructions. The code for e.g. zero-extend from V2SI to V2DImode improves from: movd %xmm0, %edx pshufd $85, %xmm0, %xmm0 movd %xmm0, %eax movq %rdx, (%rdi) movq %rax, 8(%rdi) to: pxor %xmm1, %xmm1 punpckldq %xmm1, %xmm0 movaps %xmm0, (%rdi) And the code for sign-extend from V2SI to V2DImode from: movd %xmm0, %edx pshufd $85, %xmm0, %xmm0 movd %xmm0, %eax movslq %edx, %rdx cltq movq %rdx, (%rdi) movq %rax, 8(%rdi) to: pxor %xmm1, %xmm1 pcmpgtd %xmm0, %xmm1 punpckldq %xmm1, %xmm0 movaps %xmm0, (%rdi) PR target/111023 gcc/ChangeLog: * config/i386/i386-expand.cc (ix86_split_mmx_punpck): Also handle V2QImode. (ix86_expand_sse_extend): New function. * config/i386/i386-protos.h (ix86_expand_sse_extend): New prototype. * config/i386/mmx.md (<any_extend:insn>v4qiv4hi2): Enable for TARGET_SSE2. Expand through ix86_expand_sse_extend for !TARGET_SSE4_1. (<any_extend:insn>v2hiv2si2): Ditto. (<any_extend:insn>v2qiv2hi2): Ditto. * config/i386/sse.md (<any_extend:insn>v8qiv8hi2): Ditto. (<any_extend:insn>v4hiv4si2): Ditto. (<any_extend:insn>v2siv2di2): Ditto. gcc/testsuite/ChangeLog: * gcc.target/i386/pr111023-2.c: New test. * gcc.target/i386/pr111023-4b.c: New test. * gcc.target/i386/pr111023-8b.c: New test. * gcc.target/i386/pr111023.c: New test.
