dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2024-11-20 04:18:26 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

MIPS: dspr2: Added optimization for function VP8LAddGreenToBlueAndRed_C

Browse Source 
Change-Id: If897c6c2f1c4b8405789298e135d6a1e4bf13012
This commit is contained in:
Djordje Pesut 2015-02-11 11:24:12 +01:00
parent c3a031686a
commit 2cb879f0c6
1 changed files with 56 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
src/dsp/lossless_mips_dsp_r2.c
View File

@ -463,6 +463,61 @@ static void CollectColorRedTransforms(const uint32_t* argb, int stride,
} }
} }
// Add green to blue and red channels (i.e. perform the inverse transform of
// 'subtract green').
static void AddGreenToBlueAndRed(uint32_t* data, int num_pixels) {
uint32_t temp0, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
uint32_t* const p_loop1_end = data + (num_pixels & ~3);
uint32_t* const p_loop2_end = data + num_pixels;
__asm__ volatile (
".set push \n\t"
".set noreorder \n\t"
"beq %[data], %[p_loop1_end], 3f \n\t"
" nop \n\t"
"0: \n\t"
"lw %[temp0], 0(%[data]) \n\t"
"lw %[temp1], 4(%[data]) \n\t"
"lw %[temp2], 8(%[data]) \n\t"
"lw %[temp3], 12(%[data]) \n\t"
"ext %[temp4], %[temp0], 8, 8 \n\t"
"ext %[temp5], %[temp1], 8, 8 \n\t"
"ext %[temp6], %[temp2], 8, 8 \n\t"
"ext %[temp7], %[temp3], 8, 8 \n\t"
"addiu %[data], %[data], 16 \n\t"
"replv.ph %[temp4], %[temp4] \n\t"
"replv.ph %[temp5], %[temp5] \n\t"
"replv.ph %[temp6], %[temp6] \n\t"
"replv.ph %[temp7], %[temp7] \n\t"
"addu.qb %[temp0], %[temp0], %[temp4] \n\t"
"addu.qb %[temp1], %[temp1], %[temp5] \n\t"
"addu.qb %[temp2], %[temp2], %[temp6] \n\t"
"addu.qb %[temp3], %[temp3], %[temp7] \n\t"
"sw %[temp0], -16(%[data]) \n\t"
"sw %[temp1], -12(%[data]) \n\t"
"sw %[temp2], -8(%[data]) \n\t"
"bne %[data], %[p_loop1_end], 0b \n\t"
" sw %[temp3], -4(%[data]) \n\t"
"3: \n\t"
"beq %[data], %[p_loop2_end], 2f \n\t"
" nop \n\t"
"1: \n\t"
"lw %[temp0], 0(%[data]) \n\t"
"addiu %[data], %[data], 4 \n\t"
"ext %[temp4], %[temp0], 8, 8 \n\t"
"replv.ph %[temp4], %[temp4] \n\t"
"addu.qb %[temp0], %[temp0], %[temp4] \n\t"
"bne %[data], %[p_loop2_end], 1b \n\t"
" sw %[temp0], -4(%[data]) \n\t"
"2: \n\t"
".set pop \n\t"
: [data]"+&r"(data), [temp0]"=&r"(temp0), [temp1]"=&r"(temp1),
[temp2]"=&r"(temp2), [temp3]"=&r"(temp3), [temp4]"=&r"(temp4),
[temp5]"=&r"(temp5), [temp6]"=&r"(temp6), [temp7]"=&r"(temp7)
: [p_loop1_end]"r"(p_loop1_end), [p_loop2_end]"r"(p_loop2_end)
: "memory"
);
}
#endif // WEBP_USE_MIPS_DSP_R2 #endif // WEBP_USE_MIPS_DSP_R2
//------------------------------------------------------------------------------ //------------------------------------------------------------------------------
@ -486,6 +541,7 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitMIPSdspR2(void) {
VP8LTransformColor = TransformColor; VP8LTransformColor = TransformColor;
VP8LCollectColorBlueTransforms = CollectColorBlueTransforms; VP8LCollectColorBlueTransforms = CollectColorBlueTransforms;
VP8LCollectColorRedTransforms = CollectColorRedTransforms; VP8LCollectColorRedTransforms = CollectColorRedTransforms;
VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed;
#endif // WEBP_USE_MIPS_DSP_R2 #endif // WEBP_USE_MIPS_DSP_R2
} }