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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"
- #if 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" \
- "subu %[temp1], %[temp1], %[t_con_6] \n\t" \
- "subu %[temp3], %[temp3], %[t_con_7] \n\t" \
- "addu %[temp2], %[temp2], %[temp3] \n\t" \
- "subu %[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], 17 \n\t" \
- "shll_s.w %[temp6], %[temp6], 17 \n\t" \
- ".if " #K " \n\t" \
- "mul %[temp0], %[t_con_5], %[temp0] \n\t" \
- ".endif \n\t" \
- "shll_s.w %[temp7], %[temp7], 17 \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 = 26149; \
- const int t_con_2 = 13320; \
- const int t_con_3 = 6419; \
- const int t_con_4 = 33050; \
- const int t_con_5 = 19077; \
- const int t_con_6 = 14234; \
- const int t_con_7 = 8708; \
- const int t_con_8 = 17685; \
- 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_MIPSdspR2, 3, 0, 1, 2, 0)
- ROW_FUNC(YuvToRgbaRow_MIPSdspR2, 4, 0, 1, 2, 3)
- ROW_FUNC(YuvToBgrRow_MIPSdspR2, 3, 2, 1, 0, 0)
- ROW_FUNC(YuvToBgraRow_MIPSdspR2, 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_MIPSdspR2;
- WebPSamplers[MODE_RGBA] = YuvToRgbaRow_MIPSdspR2;
- WebPSamplers[MODE_BGR] = YuvToBgrRow_MIPSdspR2;
- WebPSamplers[MODE_BGRA] = YuvToBgraRow_MIPSdspR2;
- }
- #else // !WEBP_USE_MIPS_DSP_R2
- WEBP_DSP_INIT_STUB(WebPInitSamplersMIPSdspR2)
- #endif // WEBP_USE_MIPS_DSP_R2
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