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Improve the performance of YCbCr to RGB conversion on ARM

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DRC
2011-08-24 23:27:44 +00:00
parent 7672bd3ac5
commit 00e258dedd
1 changed files with 61 additions and 9 deletions
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70
simd/jsimd_arm_neon.S
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@@ -1152,12 +1152,12 @@ asm_function jsimd_idct_2x2_neon
.macro do_load size
.if \size == 8
vld1.8 {d4}, [U]!
vld1.8 {d5}, [V]!
vld1.8 {d0}, [Y]!
pld [Y, #64]
vld1.8 {d4}, [U, :64]!
vld1.8 {d5}, [V, :64]!
vld1.8 {d0}, [Y, :64]!
pld [U, #64]
pld [V, #64]
pld [Y, #64]
.elseif \size == 4
vld1.8 {d4[0]}, [U]!
vld1.8 {d4[1]}, [U]!
@@ -1227,7 +1227,11 @@ asm_function jsimd_idct_2x2_neon
.macro generate_jsimd_ycc_rgb_convert_neon colorid, bpp, r_offs, g_offs, b_offs
.macro do_yuv_to_rgb
/*
* 2 stage pipelined YCbCr->RGB conversion
*/
.macro do_yuv_to_rgb_stage1
vaddw.u8 q3, q1, d4 /* q3 = u - 128 */
vaddw.u8 q4, q1, d5 /* q2 = v - 128 */
vmull.s16 q10, d6, d1[1] /* multiply by -11277 */
@@ -1238,6 +1242,9 @@ asm_function jsimd_idct_2x2_neon
vmull.s16 q13, d9, d1[0] /* multiply by 22971 */
vmull.s16 q14, d6, d1[3] /* multiply by 29033 */
vmull.s16 q15, d7, d1[3] /* multiply by 29033 */
.endm
.macro do_yuv_to_rgb_stage2
vrshrn.s32 d20, q10, #15
vrshrn.s32 d21, q11, #15
vrshrn.s32 d24, q12, #14
@@ -1252,6 +1259,43 @@ asm_function jsimd_idct_2x2_neon
vqmovun.s16 d1\b_offs, q14
.endm
.macro do_yuv_to_rgb_stage2_store_load_stage1
vld1.8 {d4}, [U, :64]!
vrshrn.s32 d20, q10, #15
vrshrn.s32 d21, q11, #15
vrshrn.s32 d24, q12, #14
vrshrn.s32 d25, q13, #14
vrshrn.s32 d28, q14, #14
vld1.8 {d5}, [V, :64]!
vrshrn.s32 d29, q15, #14
vaddw.u8 q10, q10, d0
vaddw.u8 q12, q12, d0
vaddw.u8 q14, q14, d0
vqmovun.s16 d1\g_offs, q10
vld1.8 {d0}, [Y, :64]!
vqmovun.s16 d1\r_offs, q12
pld [U, #64]
pld [V, #64]
pld [Y, #64]
vqmovun.s16 d1\b_offs, q14
vaddw.u8 q3, q1, d4 /* q3 = u - 128 */
vaddw.u8 q4, q1, d5 /* q2 = v - 128 */
do_store \bpp, 8
vmull.s16 q10, d6, d1[1] /* multiply by -11277 */
vmlal.s16 q10, d8, d1[2] /* multiply by -23401 */
vmull.s16 q11, d7, d1[1] /* multiply by -11277 */
vmlal.s16 q11, d9, d1[2] /* multiply by -23401 */
vmull.s16 q12, d8, d1[0] /* multiply by 22971 */
vmull.s16 q13, d9, d1[0] /* multiply by 22971 */
vmull.s16 q14, d6, d1[3] /* multiply by 29033 */
vmull.s16 q15, d7, d1[3] /* multiply by 29033 */
.endm
.macro do_yuv_to_rgb
do_yuv_to_rgb_stage1
do_yuv_to_rgb_stage2
.endm
/* Apple gas crashes on adrl, work around that by using adr.
* But this requires a copy of these constants for each function.
*/
@@ -1312,16 +1356,21 @@ asm_function jsimd_ycc_\colorid\()_convert_neon
/* Inner loop over pixels */
subs N, N, #8
blt 3f
do_load 8
do_yuv_to_rgb_stage1
subs N, N, #8
blt 2f
1:
do_load 8
do_yuv_to_rgb
do_store \bpp, 8
do_yuv_to_rgb_stage2_store_load_stage1
subs N, N, #8
bge 1b
2:
do_yuv_to_rgb_stage2
do_store \bpp, 8
tst N, #7
beq 8f
2:
3:
tst N, #4
beq 3f
do_load 4
@@ -1369,6 +1418,9 @@ asm_function jsimd_ycc_\colorid\()_convert_neon
.endfunc
.purgem do_yuv_to_rgb
.purgem do_yuv_to_rgb_stage1
.purgem do_yuv_to_rgb_stage2
.purgem do_yuv_to_rgb_stage2_store_load_stage1
.endm