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yuv_mips_dsp_r2.c
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yuv_mips_dsp_r2.c
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// 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