diff options
| -rw-r--r-- | pixman/pixman-mmx.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/pixman/pixman-mmx.c b/pixman/pixman-mmx.c index d89c3d6..f8950be 100644 --- a/pixman/pixman-mmx.c +++ b/pixman/pixman-mmx.c @@ -56,6 +56,21 @@ _mm_empty (void) } #endif +#ifdef USE_X86_MMX +/* We have to compile with -msse to use xmmintrin.h, but that causes SSE + * instructions to be generated that we don't want. Just duplicate the + * functions we want to use. */ +extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__)) +_mm_mulhi_pu16 (__m64 __A, __m64 __B) +{ + asm("pmulhuw %1, %0\n\t" + : "+y" (__A) + : "y" (__B) + ); + return __A; +} +#endif + /* Notes about writing mmx code * * give memory operands as the second operand. If you give it as the @@ -128,6 +143,7 @@ typedef struct mmxdatafield mmx_ffff0000ffff0000; mmxdatafield mmx_0000ffff00000000; mmxdatafield mmx_000000000000ffff; + mmxdatafield mmx_4x0101; } mmx_data_t; #if defined(_MSC_VER) @@ -155,6 +171,7 @@ static const mmx_data_t c = MMXDATA_INIT (.mmx_ffff0000ffff0000, 0xffff0000ffff0000), MMXDATA_INIT (.mmx_0000ffff00000000, 0x0000ffff00000000), MMXDATA_INIT (.mmx_000000000000ffff, 0x000000000000ffff), + MMXDATA_INIT (.mmx_4x0101, 0x0101010101010101), }; #ifdef USE_CVT_INTRINSICS @@ -218,8 +235,7 @@ pix_multiply (__m64 a, __m64 b) res = _mm_mullo_pi16 (a, b); res = _mm_adds_pu16 (res, MC (4x0080)); - res = _mm_adds_pu16 (res, _mm_srli_pi16 (res, 8)); - res = _mm_srli_pi16 (res, 8); + res = _mm_mulhi_pu16 (res, MC (4x0101)); return res; } |