summaryrefslogtreecommitdiff
path: root/thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c
diff options
context:
space:
mode:
Diffstat (limited to 'thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c')
-rw-r--r--thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c b/thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c
new file mode 100644
index 0000000000..1943873748
--- /dev/null
+++ b/thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c
@@ -0,0 +1,204 @@
+// Copyright 2022 Google Inc. All Rights Reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the COPYING file in the root of the source
+// tree. An additional intellectual property rights grant can be found
+// in the file PATENTS. All contributing project authors may
+// be found in the AUTHORS file in the root of the source tree.
+// -----------------------------------------------------------------------------
+//
+// Speed-critical functions for Sharp YUV.
+//
+// Author: Skal (pascal.massimino@gmail.com)
+
+#include "sharpyuv/sharpyuv_dsp.h"
+
+#if defined(WEBP_USE_SSE2)
+#include <stdlib.h>
+#include <emmintrin.h>
+#endif
+
+extern void InitSharpYuvSSE2(void);
+
+#if defined(WEBP_USE_SSE2)
+
+static uint16_t clip_SSE2(int v, int max) {
+ return (v < 0) ? 0 : (v > max) ? max : (uint16_t)v;
+}
+
+static uint64_t SharpYuvUpdateY_SSE2(const uint16_t* ref, const uint16_t* src,
+ uint16_t* dst, int len, int bit_depth) {
+ const int max_y = (1 << bit_depth) - 1;
+ uint64_t diff = 0;
+ uint32_t tmp[4];
+ int i;
+ const __m128i zero = _mm_setzero_si128();
+ const __m128i max = _mm_set1_epi16(max_y);
+ const __m128i one = _mm_set1_epi16(1);
+ __m128i sum = zero;
+
+ for (i = 0; i + 8 <= len; i += 8) {
+ const __m128i A = _mm_loadu_si128((const __m128i*)(ref + i));
+ const __m128i B = _mm_loadu_si128((const __m128i*)(src + i));
+ const __m128i C = _mm_loadu_si128((const __m128i*)(dst + i));
+ const __m128i D = _mm_sub_epi16(A, B); // diff_y
+ const __m128i E = _mm_cmpgt_epi16(zero, D); // sign (-1 or 0)
+ const __m128i F = _mm_add_epi16(C, D); // new_y
+ const __m128i G = _mm_or_si128(E, one); // -1 or 1
+ const __m128i H = _mm_max_epi16(_mm_min_epi16(F, max), zero);
+ const __m128i I = _mm_madd_epi16(D, G); // sum(abs(...))
+ _mm_storeu_si128((__m128i*)(dst + i), H);
+ sum = _mm_add_epi32(sum, I);
+ }
+ _mm_storeu_si128((__m128i*)tmp, sum);
+ diff = tmp[3] + tmp[2] + tmp[1] + tmp[0];
+ for (; i < len; ++i) {
+ const int diff_y = ref[i] - src[i];
+ const int new_y = (int)dst[i] + diff_y;
+ dst[i] = clip_SSE2(new_y, max_y);
+ diff += (uint64_t)abs(diff_y);
+ }
+ return diff;
+}
+
+static void SharpYuvUpdateRGB_SSE2(const int16_t* ref, const int16_t* src,
+ int16_t* dst, int len) {
+ int i = 0;
+ for (i = 0; i + 8 <= len; i += 8) {
+ const __m128i A = _mm_loadu_si128((const __m128i*)(ref + i));
+ const __m128i B = _mm_loadu_si128((const __m128i*)(src + i));
+ const __m128i C = _mm_loadu_si128((const __m128i*)(dst + i));
+ const __m128i D = _mm_sub_epi16(A, B); // diff_uv
+ const __m128i E = _mm_add_epi16(C, D); // new_uv
+ _mm_storeu_si128((__m128i*)(dst + i), E);
+ }
+ for (; i < len; ++i) {
+ const int diff_uv = ref[i] - src[i];
+ dst[i] += diff_uv;
+ }
+}
+
+static void SharpYuvFilterRow16_SSE2(const int16_t* A, const int16_t* B,
+ int len, const uint16_t* best_y,
+ uint16_t* out, int bit_depth) {
+ const int max_y = (1 << bit_depth) - 1;
+ int i;
+ const __m128i kCst8 = _mm_set1_epi16(8);
+ const __m128i max = _mm_set1_epi16(max_y);
+ const __m128i zero = _mm_setzero_si128();
+ for (i = 0; i + 8 <= len; i += 8) {
+ const __m128i a0 = _mm_loadu_si128((const __m128i*)(A + i + 0));
+ const __m128i a1 = _mm_loadu_si128((const __m128i*)(A + i + 1));
+ const __m128i b0 = _mm_loadu_si128((const __m128i*)(B + i + 0));
+ const __m128i b1 = _mm_loadu_si128((const __m128i*)(B + i + 1));
+ const __m128i a0b1 = _mm_add_epi16(a0, b1);
+ const __m128i a1b0 = _mm_add_epi16(a1, b0);
+ const __m128i a0a1b0b1 = _mm_add_epi16(a0b1, a1b0); // A0+A1+B0+B1
+ const __m128i a0a1b0b1_8 = _mm_add_epi16(a0a1b0b1, kCst8);
+ const __m128i a0b1_2 = _mm_add_epi16(a0b1, a0b1); // 2*(A0+B1)
+ const __m128i a1b0_2 = _mm_add_epi16(a1b0, a1b0); // 2*(A1+B0)
+ const __m128i c0 = _mm_srai_epi16(_mm_add_epi16(a0b1_2, a0a1b0b1_8), 3);
+ const __m128i c1 = _mm_srai_epi16(_mm_add_epi16(a1b0_2, a0a1b0b1_8), 3);
+ const __m128i d0 = _mm_add_epi16(c1, a0);
+ const __m128i d1 = _mm_add_epi16(c0, a1);
+ const __m128i e0 = _mm_srai_epi16(d0, 1);
+ const __m128i e1 = _mm_srai_epi16(d1, 1);
+ const __m128i f0 = _mm_unpacklo_epi16(e0, e1);
+ const __m128i f1 = _mm_unpackhi_epi16(e0, e1);
+ const __m128i g0 = _mm_loadu_si128((const __m128i*)(best_y + 2 * i + 0));
+ const __m128i g1 = _mm_loadu_si128((const __m128i*)(best_y + 2 * i + 8));
+ const __m128i h0 = _mm_add_epi16(g0, f0);
+ const __m128i h1 = _mm_add_epi16(g1, f1);
+ const __m128i i0 = _mm_max_epi16(_mm_min_epi16(h0, max), zero);
+ const __m128i i1 = _mm_max_epi16(_mm_min_epi16(h1, max), zero);
+ _mm_storeu_si128((__m128i*)(out + 2 * i + 0), i0);
+ _mm_storeu_si128((__m128i*)(out + 2 * i + 8), i1);
+ }
+ for (; i < len; ++i) {
+ // (9 * A0 + 3 * A1 + 3 * B0 + B1 + 8) >> 4 =
+ // = (8 * A0 + 2 * (A1 + B0) + (A0 + A1 + B0 + B1 + 8)) >> 4
+ // We reuse the common sub-expressions.
+ const int a0b1 = A[i + 0] + B[i + 1];
+ const int a1b0 = A[i + 1] + B[i + 0];
+ const int a0a1b0b1 = a0b1 + a1b0 + 8;
+ const int v0 = (8 * A[i + 0] + 2 * a1b0 + a0a1b0b1) >> 4;
+ const int v1 = (8 * A[i + 1] + 2 * a0b1 + a0a1b0b1) >> 4;
+ out[2 * i + 0] = clip_SSE2(best_y[2 * i + 0] + v0, max_y);
+ out[2 * i + 1] = clip_SSE2(best_y[2 * i + 1] + v1, max_y);
+ }
+}
+
+static WEBP_INLINE __m128i s16_to_s32(__m128i in) {
+ return _mm_srai_epi32(_mm_unpacklo_epi16(in, in), 16);
+}
+
+static void SharpYuvFilterRow32_SSE2(const int16_t* A, const int16_t* B,
+ int len, const uint16_t* best_y,
+ uint16_t* out, int bit_depth) {
+ const int max_y = (1 << bit_depth) - 1;
+ int i;
+ const __m128i kCst8 = _mm_set1_epi32(8);
+ const __m128i max = _mm_set1_epi16(max_y);
+ const __m128i zero = _mm_setzero_si128();
+ for (i = 0; i + 4 <= len; i += 4) {
+ const __m128i a0 = s16_to_s32(_mm_loadl_epi64((const __m128i*)(A + i + 0)));
+ const __m128i a1 = s16_to_s32(_mm_loadl_epi64((const __m128i*)(A + i + 1)));
+ const __m128i b0 = s16_to_s32(_mm_loadl_epi64((const __m128i*)(B + i + 0)));
+ const __m128i b1 = s16_to_s32(_mm_loadl_epi64((const __m128i*)(B + i + 1)));
+ const __m128i a0b1 = _mm_add_epi32(a0, b1);
+ const __m128i a1b0 = _mm_add_epi32(a1, b0);
+ const __m128i a0a1b0b1 = _mm_add_epi32(a0b1, a1b0); // A0+A1+B0+B1
+ const __m128i a0a1b0b1_8 = _mm_add_epi32(a0a1b0b1, kCst8);
+ const __m128i a0b1_2 = _mm_add_epi32(a0b1, a0b1); // 2*(A0+B1)
+ const __m128i a1b0_2 = _mm_add_epi32(a1b0, a1b0); // 2*(A1+B0)
+ const __m128i c0 = _mm_srai_epi32(_mm_add_epi32(a0b1_2, a0a1b0b1_8), 3);
+ const __m128i c1 = _mm_srai_epi32(_mm_add_epi32(a1b0_2, a0a1b0b1_8), 3);
+ const __m128i d0 = _mm_add_epi32(c1, a0);
+ const __m128i d1 = _mm_add_epi32(c0, a1);
+ const __m128i e0 = _mm_srai_epi32(d0, 1);
+ const __m128i e1 = _mm_srai_epi32(d1, 1);
+ const __m128i f0 = _mm_unpacklo_epi32(e0, e1);
+ const __m128i f1 = _mm_unpackhi_epi32(e0, e1);
+ const __m128i g = _mm_loadu_si128((const __m128i*)(best_y + 2 * i + 0));
+ const __m128i h_16 = _mm_add_epi16(g, _mm_packs_epi32(f0, f1));
+ const __m128i final = _mm_max_epi16(_mm_min_epi16(h_16, max), zero);
+ _mm_storeu_si128((__m128i*)(out + 2 * i + 0), final);
+ }
+ for (; i < len; ++i) {
+ // (9 * A0 + 3 * A1 + 3 * B0 + B1 + 8) >> 4 =
+ // = (8 * A0 + 2 * (A1 + B0) + (A0 + A1 + B0 + B1 + 8)) >> 4
+ // We reuse the common sub-expressions.
+ const int a0b1 = A[i + 0] + B[i + 1];
+ const int a1b0 = A[i + 1] + B[i + 0];
+ const int a0a1b0b1 = a0b1 + a1b0 + 8;
+ const int v0 = (8 * A[i + 0] + 2 * a1b0 + a0a1b0b1) >> 4;
+ const int v1 = (8 * A[i + 1] + 2 * a0b1 + a0a1b0b1) >> 4;
+ out[2 * i + 0] = clip_SSE2(best_y[2 * i + 0] + v0, max_y);
+ out[2 * i + 1] = clip_SSE2(best_y[2 * i + 1] + v1, max_y);
+ }
+}
+
+static void SharpYuvFilterRow_SSE2(const int16_t* A, const int16_t* B, int len,
+ const uint16_t* best_y, uint16_t* out,
+ int bit_depth) {
+ if (bit_depth <= 10) {
+ SharpYuvFilterRow16_SSE2(A, B, len, best_y, out, bit_depth);
+ } else {
+ SharpYuvFilterRow32_SSE2(A, B, len, best_y, out, bit_depth);
+ }
+}
+
+//------------------------------------------------------------------------------
+
+extern void InitSharpYuvSSE2(void);
+
+WEBP_TSAN_IGNORE_FUNCTION void InitSharpYuvSSE2(void) {
+ SharpYuvUpdateY = SharpYuvUpdateY_SSE2;
+ SharpYuvUpdateRGB = SharpYuvUpdateRGB_SSE2;
+ SharpYuvFilterRow = SharpYuvFilterRow_SSE2;
+}
+#else // !WEBP_USE_SSE2
+
+void InitSharpYuvSSE2(void) {}
+
+#endif // WEBP_USE_SSE2
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 09:01:01 +0000