; ; Copyright (c) 2010 The VP8 project authors. All Rights Reserved. ; ; Use of this source code is governed by a BSD-style license and patent ; grant that can be found in the LICENSE file in the root of the source ; tree. All contributing project authors may be found in the AUTHORS ; file in the root of the source tree. ; EXPORT |vp8_dequant_dc_idct_v6| ; ARM ; REQUIRE8 ; PRESERVE8 AREA |.text|, CODE, READONLY ; name this block of code ;void vp8_dequant_dc_idct_v6(short *input, short *dq, short *output, int pitch,int Dc) |vp8_dequant_dc_idct_v6| PROC stmdb sp!, {r4-r11, lr} ldr r6, [sp, #36] ;load Dc ldr r4, [r0] ;input ldr r5, [r1], #4 ;dq sub sp, sp, #4 str r0, [sp] smultt r7, r4, r5 ldr r4, [r0, #4] ;input ldr r5, [r1], #4 ;dq strh r6, [r0], #2 strh r7, [r0], #2 smulbb r6, r4, r5 smultt r7, r4, r5 ldr r4, [r0, #4] ;input ldr r5, [r1], #4 ;dq strh r6, [r0], #2 strh r7, [r0], #2 mov r12, #3 dequant_dc_idct_loop smulbb r6, r4, r5 smultt r7, r4, r5 ldr r4, [r0, #4] ;input ldr r5, [r1], #4 ;dq strh r6, [r0], #2 strh r7, [r0], #2 smulbb r6, r4, r5 smultt r7, r4, r5 subs r12, r12, #1 ldrne r4, [r0, #4] ldrne r5, [r1], #4 strh r6, [r0], #2 strh r7, [r0], #2 bne dequant_dc_idct_loop sub r0, r0, #32 mov r1, r2 mov r2, r3 ; short_idct4x4llm_v6_dual mov r3, #0x00004E00 ; cos orr r3, r3, #0x0000007B ; cospi8sqrt2minus1 mov r4, #0x00008A00 ; sin orr r4, r4, #0x0000008C ; sinpi8sqrt2 mov r5, #0x2 ; i=2 i loop1_dual_11 ldr r6, [r0, #(4*2)] ; i5 | i4 5|4 ldr r12, [r0, #(12*2)] ; i13 | i12 13|12 ldr r14, [r0, #(8*2)] ; i9 | i8 9|8 smulwt r9, r3, r6 ; (ip[5] * cospi8sqrt2minus1) >> 16 5c smulwb r7, r3, r6 ; (ip[4] * cospi8sqrt2minus1) >> 16 4c smulwt r10, r4, r6 ; (ip[5] * sinpi8sqrt2) >> 16 5s smulwb r8, r4, r6 ; (ip[4] * sinpi8sqrt2) >> 16 4s pkhbt r7, r7, r9, lsl #16 ; 5c | 4c smulwt r11, r3, r12 ; (ip[13] * cospi8sqrt2minus1) >> 16 13c pkhbt r8, r8, r10, lsl #16 ; 5s | 4s uadd16 r6, r6, r7 ; 5c+5 | 4c+4 smulwt r7, r4, r12 ; (ip[13] * sinpi8sqrt2) >> 16 13s smulwb r9, r3, r12 ; (ip[12] * cospi8sqrt2minus1) >> 16 12c smulwb r10, r4, r12 ; (ip[12] * sinpi8sqrt2) >> 16 12s subs r5, r5, #0x1 ; i-- -- pkhbt r9, r9, r11, lsl #16 ; 13c | 12c ldr r11, [r0], #0x4 ; i1 | i0 ++ 1|0 pkhbt r10, r10, r7, lsl #16 ; 13s | 12s uadd16 r7, r12, r9 ; 13c+13 | 12c+12 usub16 r7, r8, r7 ; c c uadd16 r6, r6, r10 ; d d uadd16 r10, r11, r14 ; a a usub16 r8, r11, r14 ; b b uadd16 r9, r10, r6 ; a+d a+d usub16 r10, r10, r6 ; a-d a-d uadd16 r6, r8, r7 ; b+c b+c usub16 r7, r8, r7 ; b-c b-c str r6, [r1, r2] ; o5 | o4 add r6, r2, r2 ; pitch * 2 p2 str r7, [r1, r6] ; o9 | o8 add r6, r6, r2 ; pitch * 3 p3 str r10, [r1, r6] ; o13 | o12 str r9, [r1], #0x4 ; o1 | o0 ++ bne loop1_dual_11 ; mov r5, #0x2 ; i=2 i sub r0, r1, #8 ; reset input/output i/o loop2_dual_22 ldr r6, [r0, r2] ; i5 | i4 5|4 ldr r1, [r0] ; i1 | i0 1|0 ldr r12, [r0, #0x4] ; i3 | i2 3|2 add r14, r2, #0x4 ; pitch + 2 p+2 ldr r14, [r0, r14] ; i7 | i6 7|6 smulwt r9, r3, r6 ; (ip[5] * cospi8sqrt2minus1) >> 16 5c smulwt r7, r3, r1 ; (ip[1] * cospi8sqrt2minus1) >> 16 1c smulwt r10, r4, r6 ; (ip[5] * sinpi8sqrt2) >> 16 5s smulwt r8, r4, r1 ; (ip[1] * sinpi8sqrt2) >> 16 1s pkhbt r11, r6, r1, lsl #16 ; i0 | i4 0|4 pkhbt r7, r9, r7, lsl #16 ; 1c | 5c pkhbt r8, r10, r8, lsl #16 ; 1s | 5s = temp1 © tc1 pkhtb r1, r1, r6, asr #16 ; i1 | i5 1|5 uadd16 r1, r7, r1 ; 1c+1 | 5c+5 = temp2 (d) td2 pkhbt r9, r14, r12, lsl #16 ; i2 | i6 2|6 uadd16 r10, r11, r9 ; a a usub16 r9, r11, r9 ; b b pkhtb r6, r12, r14, asr #16 ; i3 | i7 3|7 subs r5, r5, #0x1 ; i-- -- smulwt r7, r3, r6 ; (ip[3] * cospi8sqrt2minus1) >> 16 3c smulwt r11, r4, r6 ; (ip[3] * sinpi8sqrt2) >> 16 3s smulwb r12, r3, r6 ; (ip[7] * cospi8sqrt2minus1) >> 16 7c smulwb r14, r4, r6 ; (ip[7] * sinpi8sqrt2) >> 16 7s pkhbt r7, r12, r7, lsl #16 ; 3c | 7c pkhbt r11, r14, r11, lsl #16 ; 3s | 7s = temp1 (d) td1 uadd16 r6, r7, r6 ; 3c+3 | 7c+7 = temp2 (c) tc2 usub16 r12, r8, r6 ; c (o1 | o5) c uadd16 r6, r11, r1 ; d (o3 | o7) d uadd16 r7, r10, r6 ; a+d a+d mov r8, #0x4 ; set up 4's 4 orr r8, r8, #0x40000 ; 4|4 usub16 r6, r10, r6 ; a-d a-d uadd16 r6, r6, r8 ; a-d+4 3|7 uadd16 r7, r7, r8 ; a+d+4 0|4 uadd16 r10, r9, r12 ; b+c b+c usub16 r1, r9, r12 ; b-c b-c uadd16 r10, r10, r8 ; b+c+4 1|5 uadd16 r1, r1, r8 ; b-c+4 2|6 mov r8, r10, asr #19 ; o1 >> 3 strh r8, [r0, #2] ; o1 mov r8, r1, asr #19 ; o2 >> 3 strh r8, [r0, #4] ; o2 mov r8, r6, asr #19 ; o3 >> 3 strh r8, [r0, #6] ; o3 mov r8, r7, asr #19 ; o0 >> 3 strh r8, [r0], r2 ; o0 +p sxth r10, r10 ; mov r8, r10, asr #3 ; o5 >> 3 strh r8, [r0, #2] ; o5 sxth r1, r1 ; mov r8, r1, asr #3 ; o6 >> 3 strh r8, [r0, #4] ; o6 sxth r6, r6 ; mov r8, r6, asr #3 ; o7 >> 3 strh r8, [r0, #6] ; o7 sxth r7, r7 ; mov r8, r7, asr #3 ; o4 >> 3 strh r8, [r0], r2 ; o4 +p ;;;;; subs r5, r5, #0x1 ; i-- -- bne loop2_dual_22 ; ;vpx_memset ldr r0, [sp] add sp, sp, #4 mov r12, #0 str r12, [r0] str r12, [r0, #4] str r12, [r0, #8] str r12, [r0, #12] str r12, [r0, #16] str r12, [r0, #20] str r12, [r0, #24] str r12, [r0, #28] ldmia sp!, {r4 - r11, pc} ; replace vars, return restore ENDP ;|vp8_dequant_dc_idct_v68| END