ed9c66f584
Instead of using the predict buffer, the decoder now writes
the predictor into the recon buffer. For blocks with eob=0,
unnecessary idcts can be eliminated. This gave a performance
boost of ~1.8% for the HD clips used.
Tero: Added needed changes to ARM side and scheduled some
assembly code to prevent interlocks.
Patch Set 6: Merged (I1bcdca7a95aacc3a181b9faa6b10e3a71ee24df3)
into this commit because of similarities in the idct
functions.
Patch Set 7: EC bug fix.
Change-Id: Ie31d90b5d3522e1108163f2ac491e455e3f955e6
191 lines
4.6 KiB
NASM
191 lines
4.6 KiB
NASM
;
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license and patent
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; grant that can be found in the LICENSE file in the root of the source
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; tree. All contributing project authors may be found in the AUTHORS
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; file in the root of the source tree.
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;
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EXPORT |vp8_dequant_idct_add_v6|
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AREA |.text|, CODE, READONLY
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;void vp8_dequant_idct_v6(short *input, short *dq,
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; unsigned char *dest, int stride)
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; r0 = q
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; r1 = dq
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; r2 = dst
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; r3 = stride
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|vp8_dequant_idct_add_v6| PROC
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stmdb sp!, {r4-r11, lr}
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ldr r4, [r0] ;input
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ldr r5, [r1], #4 ;dq
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sub sp, sp, #4
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str r3, [sp]
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mov r12, #4
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vp8_dequant_add_loop
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smulbb r6, r4, r5
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smultt r7, r4, r5
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ldr r4, [r0, #4] ;input
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ldr r5, [r1], #4 ;dq
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strh r6, [r0], #2
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strh r7, [r0], #2
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smulbb r6, r4, r5
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smultt r7, r4, r5
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subs r12, r12, #1
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ldrne r4, [r0, #4]
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ldrne r5, [r1], #4
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strh r6, [r0], #2
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strh r7, [r0], #2
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bne vp8_dequant_add_loop
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sub r0, r0, #32
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mov r1, r0
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; short_idct4x4llm_v6_dual
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ldr r3, cospi8sqrt2minus1
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ldr r4, sinpi8sqrt2
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ldr r6, [r0, #8]
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mov r5, #2
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vp8_dequant_idct_loop1_v6
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ldr r12, [r0, #24]
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ldr r14, [r0, #16]
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smulwt r9, r3, r6
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smulwb r7, r3, r6
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smulwt r10, r4, r6
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smulwb r8, r4, r6
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pkhbt r7, r7, r9, lsl #16
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smulwt r11, r3, r12
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pkhbt r8, r8, r10, lsl #16
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uadd16 r6, r6, r7
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smulwt r7, r4, r12
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smulwb r9, r3, r12
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smulwb r10, r4, r12
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subs r5, r5, #1
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pkhbt r9, r9, r11, lsl #16
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ldr r11, [r0], #4
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pkhbt r10, r10, r7, lsl #16
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uadd16 r7, r12, r9
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usub16 r7, r8, r7
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uadd16 r6, r6, r10
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uadd16 r10, r11, r14
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usub16 r8, r11, r14
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uadd16 r9, r10, r6
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usub16 r10, r10, r6
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uadd16 r6, r8, r7
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usub16 r7, r8, r7
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str r6, [r1, #8]
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ldrne r6, [r0, #8]
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str r7, [r1, #16]
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str r10, [r1, #24]
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str r9, [r1], #4
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bne vp8_dequant_idct_loop1_v6
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mov r5, #2
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sub r0, r1, #8
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vp8_dequant_idct_loop2_v6
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ldr r6, [r0], #4
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ldr r7, [r0], #4
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ldr r8, [r0], #4
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ldr r9, [r0], #4
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smulwt r1, r3, r6
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smulwt r12, r4, r6
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smulwt lr, r3, r8
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smulwt r10, r4, r8
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pkhbt r11, r8, r6, lsl #16
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pkhbt r1, lr, r1, lsl #16
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pkhbt r12, r10, r12, lsl #16
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pkhtb r6, r6, r8, asr #16
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uadd16 r6, r1, r6
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pkhbt lr, r9, r7, lsl #16
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uadd16 r10, r11, lr
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usub16 lr, r11, lr
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pkhtb r8, r7, r9, asr #16
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subs r5, r5, #1
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smulwt r1, r3, r8
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smulwb r7, r3, r8
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smulwt r11, r4, r8
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smulwb r9, r4, r8
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pkhbt r1, r7, r1, lsl #16
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uadd16 r8, r1, r8
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pkhbt r11, r9, r11, lsl #16
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usub16 r1, r12, r8
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uadd16 r8, r11, r6
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ldr r9, c0x00040004
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ldr r12, [sp] ; get stride from stack
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uadd16 r6, r10, r8
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usub16 r7, r10, r8
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uadd16 r7, r7, r9
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uadd16 r6, r6, r9
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uadd16 r10, r14, r1
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usub16 r1, r14, r1
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uadd16 r10, r10, r9
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uadd16 r1, r1, r9
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ldr r11, [r2] ; load input from dst
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mov r8, r7, asr #3
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pkhtb r9, r8, r10, asr #19
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mov r8, r1, asr #3
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pkhtb r8, r8, r6, asr #19
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uxtb16 lr, r11, ror #8
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qadd16 r9, r9, lr
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uxtb16 lr, r11
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qadd16 r8, r8, lr
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usat16 r9, #8, r9
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usat16 r8, #8, r8
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orr r9, r8, r9, lsl #8
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ldr r11, [r2, r12] ; load input from dst
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mov r7, r7, lsl #16
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mov r1, r1, lsl #16
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mov r10, r10, lsl #16
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mov r6, r6, lsl #16
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mov r7, r7, asr #3
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pkhtb r7, r7, r10, asr #19
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mov r1, r1, asr #3
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pkhtb r1, r1, r6, asr #19
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uxtb16 r8, r11, ror #8
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qadd16 r7, r7, r8
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uxtb16 r8, r11
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qadd16 r1, r1, r8
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usat16 r7, #8, r7
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usat16 r1, #8, r1
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orr r1, r1, r7, lsl #8
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str r9, [r2], r12 ; store output to dst
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str r1, [r2], r12 ; store output to dst
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bne vp8_dequant_idct_loop2_v6
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; vpx_memset
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sub r0, r0, #32
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add sp, sp, #4
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mov r12, #0
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str r12, [r0]
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str r12, [r0, #4]
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str r12, [r0, #8]
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str r12, [r0, #12]
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str r12, [r0, #16]
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str r12, [r0, #20]
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str r12, [r0, #24]
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str r12, [r0, #28]
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ldmia sp!, {r4 - r11, pc}
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ENDP ; |vp8_dequant_idct_add_v6|
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; Constant Pool
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cospi8sqrt2minus1 DCD 0x00004E7B
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sinpi8sqrt2 DCD 0x00008A8C
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c0x00040004 DCD 0x00040004
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END
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