libvpx: Pull from upstream

source/libvpx/vp9/common/mips/msa/vp9_idct4x4_msa.c

Index: source/libvpx/vp9/common/mips/msa/vp9_idct4x4_msa.c
diff --git a/source/libvpx/vp9/common/mips/msa/vp9_idct4x4_msa.c b/source/libvpx/vp9/common/mips/msa/vp9_idct4x4_msa.c
new file mode 100644
index 0000000000000000000000000000000000000000..a3df1a4d32011a7c0805c8152eccd3f8dca15bdd
--- /dev/null
+++ b/source/libvpx/vp9/common/mips/msa/vp9_idct4x4_msa.c
@@ -0,0 +1,147 @@
+/*
+ *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE 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.
+ */
+
+#include <assert.h>
+#include "vp9/common/mips/msa/vp9_idct_msa.h"
+
+void vp9_iwht4x4_16_add_msa(const int16_t *input, uint8_t *dst,
+                            int32_t dst_stride) {
+  v8i16 in0, in1, in2, in3;
+  v4i32 in0_r, in1_r, in2_r, in3_r, in4_r;
+
+  /* load vector elements of 4x4 block */
+  LD4x4_SH(input, in0, in2, in3, in1);
+  TRANSPOSE4x4_SH_SH(in0, in2, in3, in1, in0, in2, in3, in1);
+  UNPCK_R_SH_SW(in0, in0_r);
+  UNPCK_R_SH_SW(in2, in2_r);
+  UNPCK_R_SH_SW(in3, in3_r);
+  UNPCK_R_SH_SW(in1, in1_r);
+  SRA_4V(in0_r, in1_r, in2_r, in3_r, UNIT_QUANT_SHIFT);
+
+  in0_r += in2_r;
+  in3_r -= in1_r;
+  in4_r = (in0_r - in3_r) >> 1;
+  in1_r = in4_r - in1_r;
+  in2_r = in4_r - in2_r;
+  in0_r -= in1_r;
+  in3_r += in2_r;
+
+  TRANSPOSE4x4_SW_SW(in0_r, in1_r, in2_r, in3_r, in0_r, in1_r, in2_r, in3_r);
+
+  in0_r += in1_r;
+  in2_r -= in3_r;
+  in4_r = (in0_r - in2_r) >> 1;
+  in3_r = in4_r - in3_r;
+  in1_r = in4_r - in1_r;
+  in0_r -= in3_r;
+  in2_r += in1_r;
+
+  PCKEV_H4_SH(in0_r, in0_r, in1_r, in1_r, in2_r, in2_r, in3_r, in3_r,
+              in0, in1, in2, in3);
+  ADDBLK_ST4x4_UB(in0, in3, in1, in2, dst, dst_stride);
+}
+
+void vp9_iwht4x4_1_add_msa(const int16_t *input, uint8_t *dst,
+                           int32_t dst_stride) {
+  int16_t a1, e1;
+  v8i16 in1, in0 = { 0 };
+
+  a1 = input[0] >> UNIT_QUANT_SHIFT;
+  e1 = a1 >> 1;
+  a1 -= e1;
+
+  in0 = __msa_insert_h(in0, 0, a1);
+  in0 = __msa_insert_h(in0, 1, e1);
+  in0 = __msa_insert_h(in0, 2, e1);
+  in0 = __msa_insert_h(in0, 3, e1);
+
+  in1 = in0 >> 1;
+  in0 -= in1;
+
+  ADDBLK_ST4x4_UB(in0, in1, in1, in1, dst, dst_stride);
+}
+
+void vp9_idct4x4_16_add_msa(const int16_t *input, uint8_t *dst,
+                            int32_t dst_stride) {
+  v8i16 in0, in1, in2, in3;
+
+  /* load vector elements of 4x4 block */
+  LD4x4_SH(input, in0, in1, in2, in3);
+  /* rows */
+  TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+  VP9_IDCT4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+  /* columns */
+  TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+  VP9_IDCT4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+  /* rounding (add 2^3, divide by 2^4) */
+  SRARI_H4_SH(in0, in1, in2, in3, 4);
+  ADDBLK_ST4x4_UB(in0, in1, in2, in3, dst, dst_stride);
+}
+
+void vp9_idct4x4_1_add_msa(const int16_t *input, uint8_t *dst,
+                           int32_t dst_stride) {
+  int16_t out;
+  v8i16 vec;
+
+  out = ROUND_POWER_OF_TWO((input[0] * cospi_16_64), DCT_CONST_BITS);
+  out = ROUND_POWER_OF_TWO((out * cospi_16_64), DCT_CONST_BITS);
+  out = ROUND_POWER_OF_TWO(out, 4);
+  vec = __msa_fill_h(out);
+
+  ADDBLK_ST4x4_UB(vec, vec, vec, vec, dst, dst_stride);
+}
+
+void vp9_iht4x4_16_add_msa(const int16_t *input, uint8_t *dst,
+                           int32_t dst_stride, int32_t tx_type) {
+  v8i16 in0, in1, in2, in3;
+
+  /* load vector elements of 4x4 block */
+  LD4x4_SH(input, in0, in1, in2, in3);
+  TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+
+  switch (tx_type) {
+    case DCT_DCT:
+      /* DCT in horizontal */
+      VP9_IDCT4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      /* DCT in vertical */
+      TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+      VP9_IDCT4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      break;
+    case ADST_DCT:
+      /* DCT in horizontal */
+      VP9_IDCT4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      /* ADST in vertical */
+      TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+      VP9_IADST4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      break;
+    case DCT_ADST:
+      /* ADST in horizontal */
+      VP9_IADST4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      /* DCT in vertical */
+      TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+      VP9_IDCT4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      break;
+    case ADST_ADST:
+      /* ADST in horizontal */
+      VP9_IADST4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      /* ADST in vertical */
+      TRANSPOSE4x4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
+      VP9_IADST4x4(in0, in1, in2, in3, in0, in1, in2, in3);
+      break;
+    default:
+      assert(0);
+      break;
+  }
+
+  /* final rounding (add 2^3, divide by 2^4) and shift */
+  SRARI_H4_SH(in0, in1, in2, in3, 4);
+  /* add block and store 4x4 */
+  ADDBLK_ST4x4_UB(in0, in1, in2, in3, dst, dst_stride);
+}