On 16 November 2017 at 22:21, Dylan Baker <dy...@pnwbakers.com> wrote: > Quoting Emil Velikov (2017-11-16 03:35:17) >> Hi Dylan, >> >> On 16 November 2017 at 01:10, Dylan Baker <dy...@pnwbakers.com> wrote: >> > This patch checks for an and then enables sse4.1 optimizations if the >> > host machine will be x86/x86_64. >> > >> Hell yeah, SSE is coming to town :-) >> >> Will this work if the user disables SSE4.1, say via CFLAGS=-mno-sse4.1 >> meson ...? >> My meson is still bit rough, so I could not quite grok ^^ by reading >> through the patch. >> >> Thanks >> Emil > > It'll explode horribly. Id didn't see any special handling of that in > autotools > build though either, did I miss something? > In autotools it's handled before the normal ld invocation.
Namely: configure.ac does: - construct a program using sse4.1 intrinsicts Note: return _mm_...() is required otherwise the whole program will be optimised away - the -msse is passed first and then the user flags (-mno-sse and/or anything else) - the user -mno-sse takes precedence, hence the test program fails to build - set see_supported=false and don't build the SSE optimised static library HTH Emil _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
