ref: e8b818b581b9ab7e9c8f7b1becd753dd4efbdf43
dir: /vpx_dsp/mips/idct8x8_msa.c/
/*
* 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 "./vpx_dsp_rtcd.h"
#include "vpx_dsp/mips/inv_txfm_msa.h"
void vpx_idct8x8_64_add_msa(const int16_t *input, uint8_t *dst,
int32_t dst_stride) {
v8i16 in0, in1, in2, in3, in4, in5, in6, in7;
/* load vector elements of 8x8 block */
LD_SH8(input, 8, in0, in1, in2, in3, in4, in5, in6, in7);
/* rows transform */
TRANSPOSE8x8_SH_SH(in0, in1, in2, in3, in4, in5, in6, in7, in0, in1, in2, in3,
in4, in5, in6, in7);
/* 1D idct8x8 */
VP9_IDCT8x8_1D(in0, in1, in2, in3, in4, in5, in6, in7, in0, in1, in2, in3,
in4, in5, in6, in7);
/* columns transform */
TRANSPOSE8x8_SH_SH(in0, in1, in2, in3, in4, in5, in6, in7, in0, in1, in2, in3,
in4, in5, in6, in7);
/* 1D idct8x8 */
VP9_IDCT8x8_1D(in0, in1, in2, in3, in4, in5, in6, in7, in0, in1, in2, in3,
in4, in5, in6, in7);
/* final rounding (add 2^4, divide by 2^5) and shift */
SRARI_H4_SH(in0, in1, in2, in3, 5);
SRARI_H4_SH(in4, in5, in6, in7, 5);
/* add block and store 8x8 */
VP9_ADDBLK_ST8x4_UB(dst, dst_stride, in0, in1, in2, in3);
dst += (4 * dst_stride);
VP9_ADDBLK_ST8x4_UB(dst, dst_stride, in4, in5, in6, in7);
}
void vpx_idct8x8_12_add_msa(const int16_t *input, uint8_t *dst,
int32_t dst_stride) {
v8i16 in0, in1, in2, in3, in4, in5, in6, in7;
v8i16 s0, s1, s2, s3, s4, s5, s6, s7, k0, k1, k2, k3, m0, m1, m2, m3;
v4i32 tmp0, tmp1, tmp2, tmp3;
v8i16 zero = { 0 };
/* load vector elements of 8x8 block */
LD_SH8(input, 8, in0, in1, in2, in3, in4, in5, in6, in7);
TRANSPOSE8X4_SH_SH(in0, in1, in2, in3, in0, in1, in2, in3);
/* stage1 */
ILVL_H2_SH(in3, in0, in2, in1, s0, s1);
k0 = VP9_SET_COSPI_PAIR(cospi_28_64, -cospi_4_64);
k1 = VP9_SET_COSPI_PAIR(cospi_4_64, cospi_28_64);
k2 = VP9_SET_COSPI_PAIR(-cospi_20_64, cospi_12_64);
k3 = VP9_SET_COSPI_PAIR(cospi_12_64, cospi_20_64);
DOTP_SH4_SW(s0, s0, s1, s1, k0, k1, k2, k3, tmp0, tmp1, tmp2, tmp3);
SRARI_W4_SW(tmp0, tmp1, tmp2, tmp3, DCT_CONST_BITS);
PCKEV_H2_SH(zero, tmp0, zero, tmp1, s0, s1);
PCKEV_H2_SH(zero, tmp2, zero, tmp3, s2, s3);
BUTTERFLY_4(s0, s1, s3, s2, s4, s7, s6, s5);
/* stage2 */
ILVR_H2_SH(in3, in1, in2, in0, s1, s0);
k0 = VP9_SET_COSPI_PAIR(cospi_16_64, cospi_16_64);
k1 = VP9_SET_COSPI_PAIR(cospi_16_64, -cospi_16_64);
k2 = VP9_SET_COSPI_PAIR(cospi_24_64, -cospi_8_64);
k3 = VP9_SET_COSPI_PAIR(cospi_8_64, cospi_24_64);
DOTP_SH4_SW(s0, s0, s1, s1, k0, k1, k2, k3, tmp0, tmp1, tmp2, tmp3);
SRARI_W4_SW(tmp0, tmp1, tmp2, tmp3, DCT_CONST_BITS);
PCKEV_H2_SH(zero, tmp0, zero, tmp1, s0, s1);
PCKEV_H2_SH(zero, tmp2, zero, tmp3, s2, s3);
BUTTERFLY_4(s0, s1, s2, s3, m0, m1, m2, m3);
/* stage3 */
s0 = __msa_ilvr_h(s6, s5);
k1 = VP9_SET_COSPI_PAIR(-cospi_16_64, cospi_16_64);
DOTP_SH2_SW(s0, s0, k1, k0, tmp0, tmp1);
SRARI_W2_SW(tmp0, tmp1, DCT_CONST_BITS);
PCKEV_H2_SH(zero, tmp0, zero, tmp1, s2, s3);
/* stage4 */
BUTTERFLY_8(m0, m1, m2, m3, s4, s2, s3, s7, in0, in1, in2, in3, in4, in5, in6,
in7);
TRANSPOSE4X8_SH_SH(in0, in1, in2, in3, in4, in5, in6, in7, in0, in1, in2, in3,
in4, in5, in6, in7);
VP9_IDCT8x8_1D(in0, in1, in2, in3, in4, in5, in6, in7, in0, in1, in2, in3,
in4, in5, in6, in7);
/* final rounding (add 2^4, divide by 2^5) and shift */
SRARI_H4_SH(in0, in1, in2, in3, 5);
SRARI_H4_SH(in4, in5, in6, in7, 5);
/* add block and store 8x8 */
VP9_ADDBLK_ST8x4_UB(dst, dst_stride, in0, in1, in2, in3);
dst += (4 * dst_stride);
VP9_ADDBLK_ST8x4_UB(dst, dst_stride, in4, in5, in6, in7);
}
void vpx_idct8x8_1_add_msa(const int16_t *input, uint8_t *dst,
int32_t dst_stride) {
int16_t out;
int32_t val;
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);
val = ROUND_POWER_OF_TWO(out, 5);
vec = __msa_fill_h(val);
VP9_ADDBLK_ST8x4_UB(dst, dst_stride, vec, vec, vec, vec);
dst += (4 * dst_stride);
VP9_ADDBLK_ST8x4_UB(dst, dst_stride, vec, vec, vec, vec);
}