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Diffstat (limited to 'media/libvpx/vp8/common/arm/armv6/idct_v6.asm')
| -rw-r--r-- | media/libvpx/vp8/common/arm/armv6/idct_v6.asm | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/media/libvpx/vp8/common/arm/armv6/idct_v6.asm b/media/libvpx/vp8/common/arm/armv6/idct_v6.asm new file mode 100644 index 000000000..b4d44cbeb --- /dev/null +++ b/media/libvpx/vp8/common/arm/armv6/idct_v6.asm @@ -0,0 +1,202 @@ +; +; Copyright (c) 2010 The WebM project authors. All Rights Reserved. +; +; Use of this source code is governed by a BSD-style license +; that can be found in the LICENSE 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. +; + + + EXPORT |vp8_short_idct4x4llm_v6_dual| + + AREA |.text|, CODE, READONLY + + +; void vp8_short_idct4x4llm_c(short *input, unsigned char *pred, int pitch, +; unsigned char *dst, int stride) +; r0 short* input +; r1 unsigned char* pred +; r2 int pitch +; r3 unsigned char* dst +; sp int stride + +|vp8_short_idct4x4llm_v6_dual| PROC + stmdb sp!, {r4-r11, lr} + + sub sp, sp, #4 + + mov r4, #0x00008A00 ; sin + orr r4, r4, #0x0000008C ; sinpi8sqrt2 + + mov r5, #0x00004E00 ; cos + orr r5, r5, #0x0000007B ; cospi8sqrt2minus1 + orr r5, r5, #1<<31 ; loop counter on top bit + +loop1_dual + ldr r6, [r0, #(4*2)] ; i5 | i4 + ldr r12, [r0, #(12*2)] ; i13|i12 + ldr r14, [r0, #(8*2)] ; i9 | i8 + + smulbt r9, r5, r6 ; (ip[5] * cospi8sqrt2minus1) >> 16 + smulbb r7, r5, r6 ; (ip[4] * cospi8sqrt2minus1) >> 16 + smulwt r10, r4, r6 ; (ip[5] * sinpi8sqrt2) >> 16 + smulwb r8, r4, r6 ; (ip[4] * sinpi8sqrt2) >> 16 + + smulbt r11, r5, r12 ; (ip[13] * cospi8sqrt2minus1) >> 16 + pkhtb r7, r9, r7, asr #16 ; 5c | 4c + pkhbt r8, r8, r10, lsl #16 ; 5s | 4s + uadd16 r6, r6, r7 ; 5c+5 | 4c+4 + + smulwt r7, r4, r12 ; (ip[13] * sinpi8sqrt2) >> 16 + smulbb r9, r5, r12 ; (ip[12] * cospi8sqrt2minus1) >> 16 + smulwb r10, r4, r12 ; (ip[12] * sinpi8sqrt2) >> 16 + + subs r5, r5, #1<<31 ; i-- + + pkhtb r9, r11, r9, asr #16 ; 13c | 12c + ldr r11, [r0] ; i1 | i0 + pkhbt r10, r10, r7, lsl #16 ; 13s | 12s + uadd16 r7, r12, r9 ; 13c+13 | 12c+12 + + usub16 r7, r8, r7 ; c + uadd16 r6, r6, r10 ; d + uadd16 r10, r11, r14 ; a + usub16 r8, r11, r14 ; b + + uadd16 r9, r10, r6 ; a+d + usub16 r10, r10, r6 ; a-d + uadd16 r6, r8, r7 ; b+c + usub16 r7, r8, r7 ; b-c + + ; use input buffer to store intermediate results + str r6, [r0, #(4*2)] ; o5 | o4 + str r7, [r0, #(8*2)] ; o9 | o8 + str r10,[r0, #(12*2)] ; o13|o12 + str r9, [r0], #4 ; o1 | o0 + + bcs loop1_dual + + sub r0, r0, #8 ; reset input/output + str r0, [sp] + +loop2_dual + + ldr r6, [r0, #(4*2)] ; i5 | i4 + ldr r12,[r0, #(2*2)] ; i3 | i2 + ldr r14,[r0, #(6*2)] ; i7 | i6 + ldr r0, [r0, #(0*2)] ; i1 | i0 + + smulbt r9, r5, r6 ; (ip[5] * cospi8sqrt2minus1) >> 16 + smulbt r7, r5, r0 ; (ip[1] * cospi8sqrt2minus1) >> 16 + smulwt r10, r4, r6 ; (ip[5] * sinpi8sqrt2) >> 16 + smulwt r8, r4, r0 ; (ip[1] * sinpi8sqrt2) >> 16 + + pkhbt r11, r6, r0, lsl #16 ; i0 | i4 + pkhtb r7, r7, r9, asr #16 ; 1c | 5c + pkhtb r0, r0, r6, asr #16 ; i1 | i5 + pkhbt r8, r10, r8, lsl #16 ; 1s | 5s = temp1 + + uadd16 r0, r7, r0 ; 1c+1 | 5c+5 = temp2 + pkhbt r9, r14, r12, lsl #16 ; i2 | i6 + uadd16 r10, r11, r9 ; a + usub16 r9, r11, r9 ; b + pkhtb r6, r12, r14, asr #16 ; i3 | i7 + + subs r5, r5, #1<<31 ; i-- + + smulbt r7, r5, r6 ; (ip[3] * cospi8sqrt2minus1) >> 16 + smulwt r11, r4, r6 ; (ip[3] * sinpi8sqrt2) >> 16 + smulbb r12, r5, r6 ; (ip[7] * cospi8sqrt2minus1) >> 16 + smulwb r14, r4, r6 ; (ip[7] * sinpi8sqrt2) >> 16 + + pkhtb r7, r7, r12, asr #16 ; 3c | 7c + pkhbt r11, r14, r11, lsl #16 ; 3s | 7s = temp1 + + uadd16 r6, r7, r6 ; 3c+3 | 7c+7 = temp2 + usub16 r12, r8, r6 ; c (o1 | o5) + uadd16 r6, r11, r0 ; d (o3 | o7) + uadd16 r7, r10, r6 ; a+d + + mov r8, #4 ; set up 4's + orr r8, r8, #0x40000 ; 4|4 + + usub16 r6, r10, r6 ; 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 + usub16 r0, r9, r12 ; b-c + uadd16 r10, r10, r8 ; b+c+4, 1|5 + uadd16 r8, r0, r8 ; b-c+4, 2|6 + + ldr lr, [sp, #40] ; dst stride + + ldrb r0, [r1] ; pred p0 + ldrb r11, [r1, #1] ; pred p1 + ldrb r12, [r1, #2] ; pred p2 + + add r0, r0, r7, asr #19 ; p0 + o0 + add r11, r11, r10, asr #19 ; p1 + o1 + add r12, r12, r8, asr #19 ; p2 + o2 + + usat r0, #8, r0 ; d0 = clip8(p0 + o0) + usat r11, #8, r11 ; d1 = clip8(p1 + o1) + usat r12, #8, r12 ; d2 = clip8(p2 + o2) + + add r0, r0, r11, lsl #8 ; |--|--|d1|d0| + + ldrb r11, [r1, #3] ; pred p3 + + add r0, r0, r12, lsl #16 ; |--|d2|d1|d0| + + add r11, r11, r6, asr #19 ; p3 + o3 + + sxth r7, r7 ; + sxth r10, r10 ; + + usat r11, #8, r11 ; d3 = clip8(p3 + o3) + + sxth r8, r8 ; + sxth r6, r6 ; + + add r0, r0, r11, lsl #24 ; |d3|d2|d1|d0| + + ldrb r12, [r1, r2]! ; pred p4 + str r0, [r3], lr + ldrb r11, [r1, #1] ; pred p5 + + add r12, r12, r7, asr #3 ; p4 + o4 + add r11, r11, r10, asr #3 ; p5 + o5 + + usat r12, #8, r12 ; d4 = clip8(p4 + o4) + usat r11, #8, r11 ; d5 = clip8(p5 + o5) + + ldrb r7, [r1, #2] ; pred p6 + ldrb r10, [r1, #3] ; pred p6 + + add r12, r12, r11, lsl #8 ; |--|--|d5|d4| + + add r7, r7, r8, asr #3 ; p6 + o6 + add r10, r10, r6, asr #3 ; p7 + o7 + + ldr r0, [sp] ; load input pointer + + usat r7, #8, r7 ; d6 = clip8(p6 + o6) + usat r10, #8, r10 ; d7 = clip8(p7 + o7) + + add r12, r12, r7, lsl #16 ; |--|d6|d5|d4| + add r12, r12, r10, lsl #24 ; |d7|d6|d5|d4| + + str r12, [r3], lr + add r0, r0, #16 + add r1, r1, r2 ; pred + pitch + + bcs loop2_dual + + add sp, sp, #4 ; idct_output buffer + ldmia sp!, {r4 - r11, pc} + + ENDP + + END |