libwebp: update to 0.5.0

third_party/libwebp/dsp/yuv_mips_dsp_r2.c

+// Copyright 2014 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.
+// -----------------------------------------------------------------------------
+//
+// MIPS DSPr2 version of YUV to RGB upsampling functions.
+//
+// Author(s):  Branimir Vasic (branimir.vasic@imgtec.com)
+//             Djordje Pesut  (djordje.pesut@imgtec.com)
+
+#include "./dsp.h"
+
+// Code is disabled for now, in favor of the plain-C version
+#if 0  // defined(WEBP_USE_MIPS_DSP_R2)
+
+#include "./yuv.h"
+
+//------------------------------------------------------------------------------
+// simple point-sampling
+
+#define ROW_FUNC_PART_1()                                                      \
+  "lbu              %[temp3],   0(%[v])                         \n\t"          \
+  "lbu              %[temp4],   0(%[u])                         \n\t"          \
+  "lbu              %[temp0],   0(%[y])                         \n\t"          \
+  "mul              %[temp1],   %[t_con_1],     %[temp3]        \n\t"          \
+  "mul              %[temp3],   %[t_con_2],     %[temp3]        \n\t"          \
+  "mul              %[temp2],   %[t_con_3],     %[temp4]        \n\t"          \
+  "mul              %[temp4],   %[t_con_4],     %[temp4]        \n\t"          \
+  "mul              %[temp0],   %[t_con_5],     %[temp0]        \n\t"          \
+  "addu             %[temp1],   %[temp1],       %[t_con_6]      \n\t"          \
+  "subu             %[temp3],   %[temp3],       %[t_con_7]      \n\t"          \
+  "addu             %[temp2],   %[temp2],       %[temp3]        \n\t"          \
+  "addu             %[temp4],   %[temp4],       %[t_con_8]      \n\t"          \
+
+#define ROW_FUNC_PART_2(R, G, B, K)                                            \
+  "addu             %[temp5],   %[temp0],       %[temp1]        \n\t"          \
+  "subu             %[temp6],   %[temp0],       %[temp2]        \n\t"          \
+  "addu             %[temp7],   %[temp0],       %[temp4]        \n\t"          \
+".if " #K "                                                     \n\t"          \
+  "lbu              %[temp0],   1(%[y])                         \n\t"          \
+".endif                                                         \n\t"          \
+  "shll_s.w         %[temp5],   %[temp5],       9               \n\t"          \
+  "shll_s.w         %[temp6],   %[temp6],       9               \n\t"          \
+".if " #K "                                                     \n\t"          \
+  "mul              %[temp0],   %[t_con_5],     %[temp0]        \n\t"          \
+".endif                                                         \n\t"          \
+  "shll_s.w         %[temp7],   %[temp7],       9               \n\t"          \
+  "precrqu_s.qb.ph  %[temp5],   %[temp5],       $zero           \n\t"          \
+  "precrqu_s.qb.ph  %[temp6],   %[temp6],       $zero           \n\t"          \
+  "precrqu_s.qb.ph  %[temp7],   %[temp7],       $zero           \n\t"          \
+  "srl              %[temp5],   %[temp5],       24              \n\t"          \
+  "srl              %[temp6],   %[temp6],       24              \n\t"          \
+  "srl              %[temp7],   %[temp7],       24              \n\t"          \
+  "sb               %[temp5],   " #R "(%[dst])                  \n\t"          \
+  "sb               %[temp6],   " #G "(%[dst])                  \n\t"          \
+  "sb               %[temp7],   " #B "(%[dst])                  \n\t"          \
+
+#define ASM_CLOBBER_LIST()                                                     \
+  : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),             \
+    [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),             \
+    [temp6]"=&r"(temp6), [temp7]"=&r"(temp7)                                   \
+  : [t_con_1]"r"(t_con_1), [t_con_2]"r"(t_con_2), [t_con_3]"r"(t_con_3),       \
+    [t_con_4]"r"(t_con_4), [t_con_5]"r"(t_con_5), [t_con_6]"r"(t_con_6),       \
+    [u]"r"(u), [v]"r"(v), [y]"r"(y), [dst]"r"(dst),                            \
+    [t_con_7]"r"(t_con_7), [t_con_8]"r"(t_con_8)                               \
+  : "memory", "hi", "lo"                                                       \
+
+#define ROW_FUNC(FUNC_NAME, XSTEP, R, G, B, A)                                 \
+static void FUNC_NAME(const uint8_t* y,                                        \
+                      const uint8_t* u, const uint8_t* v,                      \
+                      uint8_t* dst, int len) {                                 \
+  int i;                                                                       \
+  uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;             \
+  const int t_con_1 = kVToR;                                                   \
+  const int t_con_2 = kVToG;                                                   \
+  const int t_con_3 = kUToG;                                                   \
+  const int t_con_4 = kUToB;                                                   \
+  const int t_con_5 = kYScale;                                                 \
+  const int t_con_6 = kRCst;                                                   \
+  const int t_con_7 = kGCst;                                                   \
+  const int t_con_8 = kBCst;                                                   \
+  for (i = 0; i < (len >> 1); i++) {                                           \
+    __asm__ volatile (                                                         \
+      ROW_FUNC_PART_1()                                                        \
+      ROW_FUNC_PART_2(R, G, B, 1)                                              \
+      ROW_FUNC_PART_2(R + XSTEP, G + XSTEP, B + XSTEP, 0)                      \
+      ASM_CLOBBER_LIST()                                                       \
+    );                                                                         \
+    if (A) dst[A] = dst[A + XSTEP] = 0xff;                                     \
+    y += 2;                                                                    \
+    ++u;                                                                       \
+    ++v;                                                                       \
+    dst += 2 * XSTEP;                                                          \
+  }                                                                            \
+  if (len & 1) {                                                               \
+    __asm__ volatile (                                                         \
+      ROW_FUNC_PART_1()                                                        \
+      ROW_FUNC_PART_2(R, G, B, 0)                                              \
+      ASM_CLOBBER_LIST()                                                       \
+    );                                                                         \
+    if (A) dst[A] = 0xff;                                                      \
+  }                                                                            \
+}
+
+ROW_FUNC(YuvToRgbRow,      3, 0, 1, 2, 0)
+ROW_FUNC(YuvToRgbaRow,     4, 0, 1, 2, 3)
+ROW_FUNC(YuvToBgrRow,      3, 2, 1, 0, 0)
+ROW_FUNC(YuvToBgraRow,     4, 2, 1, 0, 3)
+
+#undef ROW_FUNC
+#undef ASM_CLOBBER_LIST
+#undef ROW_FUNC_PART_2
+#undef ROW_FUNC_PART_1
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void WebPInitSamplersMIPSdspR2(void);
+
+WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersMIPSdspR2(void) {
+  WebPSamplers[MODE_RGB]  = YuvToRgbRow;
+  WebPSamplers[MODE_RGBA] = YuvToRgbaRow;
+  WebPSamplers[MODE_BGR]  = YuvToBgrRow;
+  WebPSamplers[MODE_BGRA] = YuvToBgraRow;
+}
+
+#else  // !WEBP_USE_MIPS_DSP_R2
+
+WEBP_DSP_INIT_STUB(WebPInitSamplersMIPSdspR2)
+
+#endif  // WEBP_USE_MIPS_DSP_R2