Commit d3465a53 authored by Scott LaVarnway's avatar Scott LaVarnway Committed by Gerrit Code Review
Browse files

Added sse2 instrinsic version of vp8_sad3x16

1.6% boost in decoder performance for the clip used.

Change-Id: I91f3c4573fd3d10afbf18930f279af7ae2223e3a
parent be4e7c5f
......@@ -182,7 +182,7 @@ prototype unsigned int vp8_sad16x3 "const unsigned char *src_ptr, int src_strid
specialize vp8_sad16x3 sse2
prototype unsigned int vp8_sad3x16 "const unsigned char *src_ptr, int src_stride, const unsigned char *ref_ptr, int ref_stride, int max_sad"
specialize vp8_sad3x16
specialize vp8_sad3x16 sse2
fi
#
......
......@@ -44,6 +44,48 @@ unsigned int vp8_sad16x3_sse2(
return _mm_cvtsi128_si32(sad);
}
unsigned int vp8_sad3x16_sse2(
const unsigned char *src_ptr,
int src_stride,
const unsigned char *ref_ptr,
int ref_stride,
int max_sad) {
int r;
__m128i s0, s1, s2, s3;
__m128i r0, r1, r2, r3;
__m128i sad = _mm_set1_epi16(0);
for (r = 0; r < 16; r += 4) {
s0 = _mm_cvtsi32_si128 (*(const int *)(src_ptr + 0 * src_stride));
s1 = _mm_cvtsi32_si128 (*(const int *)(src_ptr + 1 * src_stride));
s2 = _mm_cvtsi32_si128 (*(const int *)(src_ptr + 2 * src_stride));
s3 = _mm_cvtsi32_si128 (*(const int *)(src_ptr + 3 * src_stride));
r0 = _mm_cvtsi32_si128 (*(const int *)(ref_ptr + 0 * src_stride));
r1 = _mm_cvtsi32_si128 (*(const int *)(ref_ptr + 1 * src_stride));
r2 = _mm_cvtsi32_si128 (*(const int *)(ref_ptr + 2 * src_stride));
r3 = _mm_cvtsi32_si128 (*(const int *)(ref_ptr + 3 * src_stride));
s0 = _mm_unpacklo_epi8(s0, s1);
r0 = _mm_unpacklo_epi8(r0, r1);
s2 = _mm_unpacklo_epi8(s2, s3);
r2 = _mm_unpacklo_epi8(r2, r3);
s0 = _mm_unpacklo_epi64(s0, s2);
r0 = _mm_unpacklo_epi64(r0, r2);
// throw out byte 3
s0 = _mm_slli_epi64(s0, 16);
r0 = _mm_slli_epi64(r0, 16);
sad = _mm_add_epi16(sad, _mm_sad_epu8(s0, r0));
src_ptr += src_stride*4;
ref_ptr += ref_stride*4;
}
sad = _mm_add_epi16(sad, _mm_srli_si128(sad, 8));
return _mm_cvtsi128_si32(sad);
}
#endif
......
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