On Wednesday, 2017-11-15 17:10:59 -0800, Dylan Baker wrote:
> This patch checks for an and then enables sse4.1 optimizations if the
> host machine will be x86/x86_64.
>
> Signed-off-by: Dylan Baker <dylanx.c.ba...@intel.com>
> ---
> meson.build | 27 ++++++++++++++++++++++++++-
> src/mesa/meson.build | 14 +++++++++++---
> 2 files changed, 37 insertions(+), 4 deletions(-)
>
> diff --git a/meson.build b/meson.build
> index 1c4200705f3..0d201c711a0 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -502,7 +502,32 @@ foreach a : ['-Wno-override-init',
> '-Wno-initializer-overrides']
> endif
> endforeach
>
> -# TODO: SSE41 (which is only required for core mesa)
> +with_sse41 = false
> +if host_machine.cpu_family().startswith('x86')
> + sse41_args = ['-msse4.1']
Nit: newline here
Patches 1, 3 & 4 are:
Reviewed-by: Eric Engestrom <eric.engest...@imgtec.com>
> + # GCC on x86 (not 64) with -msse* assumes a 16 byte aligned stack, but
> that's
> + # not guaranteed
> + if host_machine.cpu_family() == 'x86'
> + sse41_args += '-mstackrealign'
> + endif
> +
> + _code = '''
> + #include <smmintrin.h>
> + int param;
> + int main () {
> + __m128i a = _mm_set1_epi32 (param), b = _mm_set1_epi32 (param + 1), c;
> + c = _mm_max_epu32(a, b);
> + return _mm_cvtsi128_si32(c);
> + }
> + '''
> +
> + if cc.compiles(_code, args : sse41_args, name : 'SSE4.1')
> + pre_args += '-DHAVE_SSE41'
> + with_sse41 = true
> + endif
> +else
> + sse41_args = []
> +endif
>
> # Check for GCC style atomics
> if cc.compiles('int main() { int n; return __atomic_load_n(&n,
> __ATOMIC_ACQUIRE); }',
> diff --git a/src/mesa/meson.build b/src/mesa/meson.build
> index b839fd02981..05a3a9ac55d 100644
> --- a/src/mesa/meson.build
> +++ b/src/mesa/meson.build
> @@ -592,9 +592,6 @@ files_libmesa_gallium = files(
> 'state_tracker/st_vdpau.h',
> )
>
> -# TODO: sse41
> -libmesa_sse41 = []
> -
> matypes_h = []
> if with_asm_arch == 'x86' or with_asm_arch == 'x86_64'
> gen_matypes = executable(
> @@ -692,6 +689,17 @@ files_libmesa_common += [
> sha1_h,
> ]
>
> +if with_sse41
> + libmesa_sse41 = static_library(
> + 'mesa_sse41',
> + files('main/streaming-load-memcpy.c', 'main/sse_minmax.c'),
> + c_args : [c_vis_args, c_msvc_compat_args, sse41_args],
> + include_directories : inc_common,
> + )
> +else
> + libmesa_sse41 = []
> +endif
> +
> libmesa_classic = static_library(
> 'mesa_classic',
> [files_libmesa_common, files_libmesa_classic],
> --
> 2.15.0
>
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