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;********************************************************************
;* *
;* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
;* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
;* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
;* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
;* *
;* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2010 *
;* *
;********************************************************************
; Original implementation:
; Copyright (C) 2009 Robin Watts for Pinknoise Productions Ltd
; last mod: $Id$
;********************************************************************
AREA |.text|, CODE, READONLY
GET armopts.s
EXPORT oc_idct8x8_1_arm
EXPORT oc_idct8x8_arm
oc_idct8x8_1_arm PROC
; r0 = ogg_int16_t *_y
; r1 = ogg_uint16_t _dc
ORR r1, r1, r1, LSL #16
MOV r2, r1
MOV r3, r1
MOV r12,r1
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
STMIA r0!,{r1,r2,r3,r12}
MOV PC, r14
ENDP
oc_idct8x8_arm PROC
; r0 = ogg_int16_t *_y
; r1 = ogg_int16_t *_x
; r2 = int _last_zzi
CMP r2, #3
BLE oc_idct8x8_3_arm
CMP r2, #6
BLE oc_idct8x8_6_arm
CMP r2, #10
BLE oc_idct8x8_10_arm
oc_idct8x8_slow_arm
STMFD r13!,{r4-r11,r14}
SUB r13,r13,#64*2
; Row transforms
STR r0, [r13,#-4]!
ADD r0, r13, #4 ; Write to temp storage.
BL idct8core_arm
BL idct8core_arm
BL idct8core_arm
BL idct8core_arm
BL idct8core_arm
BL idct8core_arm
BL idct8core_arm
BL idct8core_arm
LDR r0, [r13], #4 ; Write to the final destination.
SUB r2, r1, #8*16
; Clear input data for next block.
MOV r4, #0
MOV r5, #0
MOV r6, #0
MOV r7, #0
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
STMIA r2!,{r4,r5,r6,r7}
MOV r1, r13 ; And read from temp storage.
; Column transforms
BL idct8core_down_arm
BL idct8core_down_arm
BL idct8core_down_arm
BL idct8core_down_arm
BL idct8core_down_arm
BL idct8core_down_arm
BL idct8core_down_arm
BL idct8core_down_arm
ADD r13,r13,#64*2
LDMFD r13!,{r4-r11,PC}
ENDP
oc_idct8x8_10_arm PROC
STMFD r13!,{r4-r11,r14}
SUB r13,r13,#64*2
; Row transforms
MOV r2, r0
MOV r0, r13 ; Write to temp storage.
BL idct4core_arm
BL idct3core_arm
BL idct2core_arm
BL idct1core_arm
; Clear input data for next block.
MOV r4, #0
STR r4, [r1,#-4*16]!
STR r4, [r1,#4]
STR r4, [r1,#16]
STR r4, [r1,#20]
STR r4, [r1,#32]
STR r4, [r1,#48]
MOV r1, r13 ; Read from temp storage.
MOV r0, r2 ; Write to the final destination
oc_idct8x8_10_arm_cols
; Column transforms
BL idct4core_down_arm
BL idct4core_down_arm
BL idct4core_down_arm
BL idct4core_down_arm
BL idct4core_down_arm
BL idct4core_down_arm
BL idct4core_down_arm
BL idct4core_down_arm
ADD r13,r13,#64*2
LDMFD r13!,{r4-r11,PC}
ENDP
oc_idct8x8_6_arm PROC
STMFD r13!,{r4-r7,r9-r11,r14}
SUB r13,r13,#64*2
; Row transforms
MOV r2, r0
MOV r0, r13 ; Write to temp storage.
BL idct3core_arm
BL idct2core_arm
BL idct1core_arm
; Clear input data for next block.
MOV r4, #0
STR r4, [r1,#-3*16]!
STR r4, [r1,#4]
STR r4, [r1,#16]
STR r4, [r1,#32]
MOV r1, r13 ; Read from temp storage.
MOV r0, r2 ; Write to the final destination
; Column transforms
BL idct3core_down_arm
BL idct3core_down_arm
BL idct3core_down_arm
BL idct3core_down_arm
BL idct3core_down_arm
BL idct3core_down_arm
BL idct3core_down_arm
BL idct3core_down_arm
ADD r13,r13,#64*2
LDMFD r13!,{r4-r7,r9-r11,PC}
ENDP
oc_idct8x8_3_arm PROC
STMFD r13!,{r4-r7,r9-r11,r14}
SUB r13,r13,#64*2
; Row transforms
MOV r2, r0
MOV r0, r13 ; Write to temp storage.
BL idct2core_arm
BL idct1core_arm
; Clear input data for next block.
MOV r4, #0
STR r4, [r1,#-2*16]!
STR r4, [r1,#16]
MOV r1, r13 ; Read from temp storage.
MOV r0, r2 ; Write to the final destination
; Column transforms
BL idct2core_down_arm
BL idct2core_down_arm
BL idct2core_down_arm
BL idct2core_down_arm
BL idct2core_down_arm
BL idct2core_down_arm
BL idct2core_down_arm
BL idct2core_down_arm
ADD r13,r13,#64*2
LDMFD r13!,{r4-r7,r9-r11,PC}
ENDP
idct1core_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r3, [r1], #16
MOV r12,#0x05
ORR r12,r12,#0xB500
MUL r3, r12, r3
; Stall ?
MOV r3, r3, ASR #16
STRH r3, [r0], #2
STRH r3, [r0, #14]
STRH r3, [r0, #30]
STRH r3, [r0, #46]
STRH r3, [r0, #62]
STRH r3, [r0, #78]
STRH r3, [r0, #94]
STRH r3, [r0, #110]
MOV PC,R14
ENDP
idct2core_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r9, [r1], #16 ; r9 = x[0]
LDR r12,OC_C4S4
LDRSH r11,[r1, #-14] ; r11= x[1]
LDR r3, OC_C7S1
MUL r9, r12,r9 ; r9 = t[0]<<16 = OC_C4S4*x[0]
LDR r10,OC_C1S7
MUL r3, r11,r3 ; r3 = t[4]<<16 = OC_C7S1*x[1]
MOV r9, r9, ASR #16 ; r9 = t[0]
MUL r11,r10,r11 ; r11= t[7]<<16 = OC_C1S7*x[1]
MOV r3, r3, ASR #16 ; r3 = t[4]
MUL r10,r12,r3 ; r10= t[5]<<16 = OC_C4S4*t[4]
MOV r11,r11,ASR #16 ; r11= t[7]
MUL r12,r11,r12 ; r12= t[6]<<16 = OC_C4S4*t[7]
MOV r10,r10,ASR #16 ; r10= t[5]
ADD r12,r9,r12,ASR #16 ; r12= t[0]+t[6]
ADD r12,r12,r10 ; r12= t[0]+t2[6] = t[0]+t[6]+t[5]
SUB r10,r12,r10,LSL #1 ; r10= t[0]+t2[5] = t[0]+t[6]-t[5]
ADD r3, r3, r9 ; r3 = t[0]+t[4]
ADD r11,r11,r9 ; r11= t[0]+t[7]
STRH r11,[r0], #2 ; y[0] = t[0]+t[7]
STRH r12,[r0, #14] ; y[1] = t[0]+t[6]
STRH r10,[r0, #30] ; y[2] = t[0]+t[5]
STRH r3, [r0, #46] ; y[3] = t[0]+t[4]
RSB r3, r3, r9, LSL #1 ; r3 = t[0]*2-(t[0]+t[4])=t[0]-t[4]
RSB r10,r10,r9, LSL #1 ; r10= t[0]*2-(t[0]+t[5])=t[0]-t[5]
RSB r12,r12,r9, LSL #1 ; r12= t[0]*2-(t[0]+t[6])=t[0]-t[6]
RSB r11,r11,r9, LSL #1 ; r1 = t[0]*2-(t[0]+t[7])=t[0]-t[7]
STRH r3, [r0, #62] ; y[4] = t[0]-t[4]
STRH r10,[r0, #78] ; y[5] = t[0]-t[5]
STRH r12,[r0, #94] ; y[6] = t[0]-t[6]
STRH r11,[r0, #110] ; y[7] = t[0]-t[7]
MOV PC,r14
ENDP
idct2core_down_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r9, [r1], #16 ; r9 = x[0]
LDR r12,OC_C4S4
LDRSH r11,[r1, #-14] ; r11= x[1]
LDR r3, OC_C7S1
MUL r9, r12,r9 ; r9 = t[0]<<16 = OC_C4S4*x[0]
LDR r10,OC_C1S7
MUL r3, r11,r3 ; r3 = t[4]<<16 = OC_C7S1*x[1]
MOV r9, r9, ASR #16 ; r9 = t[0]
MUL r11,r10,r11 ; r11= t[7]<<16 = OC_C1S7*x[1]
ADD r9, r9, #8 ; r9 = t[0]+8
MOV r3, r3, ASR #16 ; r3 = t[4]
MUL r10,r12,r3 ; r10= t[5]<<16 = OC_C4S4*t[4]
MOV r11,r11,ASR #16 ; r11= t[7]
MUL r12,r11,r12 ; r12= t[6]<<16 = OC_C4S4*t[7]
MOV r10,r10,ASR #16 ; r10= t[5]
ADD r12,r9,r12,ASR #16 ; r12= t[0]+t[6]+8
ADD r12,r12,r10 ; r12= t[0]+t2[6] = t[0]+t[6]+t[5]+8
SUB r10,r12,r10,LSL #1 ; r10= t[0]+t2[5] = t[0]+t[6]-t[5]+8
ADD r3, r3, r9 ; r3 = t[0]+t[4]+8
ADD r11,r11,r9 ; r11= t[0]+t[7]+8
; TODO: This is wrong.
; The C code truncates to 16 bits by storing to RAM and doing the
; shifts later; we've got an extra 4 bits here.
MOV r4, r11,ASR #4
MOV r5, r12,ASR #4
MOV r6, r10,ASR #4
MOV r7, r3, ASR #4
RSB r3, r3, r9, LSL #1 ;r3 =t[0]*2+8-(t[0]+t[4])=t[0]-t[4]+8
RSB r10,r10,r9, LSL #1 ;r10=t[0]*2+8-(t[0]+t[5])=t[0]-t[5]+8
RSB r12,r12,r9, LSL #1 ;r12=t[0]*2+8-(t[0]+t[6])=t[0]-t[6]+8
RSB r11,r11,r9, LSL #1 ;r11=t[0]*2+8-(t[0]+t[7])=t[0]-t[7]+8
MOV r3, r3, ASR #4
MOV r10,r10,ASR #4
MOV r12,r12,ASR #4
MOV r11,r11,ASR #4
STRH r4, [r0], #2 ; y[0] = t[0]+t[7]
STRH r5, [r0, #14] ; y[1] = t[0]+t[6]
STRH r6, [r0, #30] ; y[2] = t[0]+t[5]
STRH r7, [r0, #46] ; y[3] = t[0]+t[4]
STRH r3, [r0, #62] ; y[4] = t[0]-t[4]
STRH r10,[r0, #78] ; y[5] = t[0]-t[5]
STRH r12,[r0, #94] ; y[6] = t[0]-t[6]
STRH r11,[r0, #110] ; y[7] = t[0]-t[7]
MOV PC,r14
ENDP
idct3core_arm PROC
LDRSH r9, [r1], #16 ; r9 = x[0]
LDR r12,OC_C4S4 ; r12= OC_C4S4
LDRSH r3, [r1, #-12] ; r3 = x[2]
LDR r10,OC_C6S2 ; r10= OC_C6S2
MUL r9, r12,r9 ; r9 = t[0]<<16 = OC_C4S4*x[0]
LDR r4, OC_C2S6 ; r4 = OC_C2S6
MUL r10,r3, r10 ; r10= t[2]<<16 = OC_C6S2*x[2]
LDRSH r11,[r1, #-14] ; r11= x[1]
MUL r3, r4, r3 ; r3 = t[3]<<16 = OC_C2S6*x[2]
LDR r4, OC_C7S1 ; r4 = OC_C7S1
LDR r5, OC_C1S7 ; r5 = OC_C1S7
MOV r9, r9, ASR #16 ; r9 = t[0]
MUL r4, r11,r4 ; r4 = t[4]<<16 = OC_C7S1*x[1]
ADD r3, r9, r3, ASR #16 ; r3 = t[0]+t[3]
MUL r11,r5, r11 ; r11= t[7]<<16 = OC_C1S7*x[1]
MOV r4, r4, ASR #16 ; r4 = t[4]
MUL r5, r12,r4 ; r5 = t[5]<<16 = OC_C4S4*t[4]
MOV r11,r11,ASR #16 ; r11= t[7]
MUL r12,r11,r12 ; r12= t[6]<<16 = OC_C4S4*t[7]
ADD r10,r9, r10,ASR #16 ; r10= t[1] = t[0]+t[2]
RSB r6, r10,r9, LSL #1 ; r6 = t[2] = t[0]-t[2]
; r3 = t2[0] = t[0]+t[3]
RSB r9, r3, r9, LSL #1 ; r9 = t2[3] = t[0]-t[3]
MOV r12,r12,ASR #16 ; r12= t[6]
ADD r5, r12,r5, ASR #16 ; r5 = t2[6] = t[6]+t[5]
RSB r12,r5, r12,LSL #1 ; r12= t2[5] = t[6]-t[5]
ADD r11,r3, r11 ; r11= t2[0]+t[7]
ADD r5, r10,r5 ; r5 = t[1]+t2[6]
ADD r12,r6, r12 ; r12= t[2]+t2[5]
ADD r4, r9, r4 ; r4 = t2[3]+t[4]
STRH r11,[r0], #2 ; y[0] = t[0]+t[7]
STRH r5, [r0, #14] ; y[1] = t[1]+t2[6]
STRH r12,[r0, #30] ; y[2] = t[2]+t2[5]
STRH r4, [r0, #46] ; y[3] = t2[3]+t[4]
RSB r11,r11,r3, LSL #1 ; r11= t2[0] - t[7]
RSB r5, r5, r10,LSL #1 ; r5 = t[1] - t2[6]
RSB r12,r12,r6, LSL #1 ; r6 = t[2] - t2[5]
RSB r4, r4, r9, LSL #1 ; r4 = t2[3] - t[4]
STRH r4, [r0, #62] ; y[4] = t2[3]-t[4]
STRH r12,[r0, #78] ; y[5] = t[2]-t2[5]
STRH r5, [r0, #94] ; y[6] = t[1]-t2[6]
STRH r11,[r0, #110] ; y[7] = t2[0]-t[7]
MOV PC,R14
ENDP
idct3core_down_arm PROC
LDRSH r9, [r1], #16 ; r9 = x[0]
LDR r12,OC_C4S4 ; r12= OC_C4S4
LDRSH r3, [r1, #-12] ; r3 = x[2]
LDR r10,OC_C6S2 ; r10= OC_C6S2
MUL r9, r12,r9 ; r9 = t[0]<<16 = OC_C4S4*x[0]
LDR r4, OC_C2S6 ; r4 = OC_C2S6
MUL r10,r3, r10 ; r10= t[2]<<16 = OC_C6S2*x[2]
LDRSH r11,[r1, #-14] ; r11= x[1]
MUL r3, r4, r3 ; r3 = t[3]<<16 = OC_C2S6*x[2]
LDR r4, OC_C7S1 ; r4 = OC_C7S1
LDR r5, OC_C1S7 ; r5 = OC_C1S7
MOV r9, r9, ASR #16 ; r9 = t[0]
MUL r4, r11,r4 ; r4 = t[4]<<16 = OC_C7S1*x[1]
ADD r9, r9, #8 ; r9 = t[0]+8
MUL r11,r5, r11 ; r11= t[7]<<16 = OC_C1S7*x[1]
ADD r3, r9, r3, ASR #16 ; r3 = t[0]+t[3]+8
MOV r4, r4, ASR #16 ; r4 = t[4]
MUL r5, r12,r4 ; r5 = t[5]<<16 = OC_C4S4*t[4]
MOV r11,r11,ASR #16 ; r11= t[7]
MUL r12,r11,r12 ; r12= t[6]<<16 = OC_C4S4*t[7]
ADD r10,r9, r10,ASR #16 ; r10= t[1]+8 = t[0]+t[2]+8
RSB r6, r10,r9, LSL #1 ; r6 = t[2]+8 = t[0]-t[2]+8
; r3 = t2[0]+8 = t[0]+t[3]+8
RSB r9, r3, r9, LSL #1 ; r9 = t2[3]+8 = t[0]-t[3]+8
MOV r12,r12,ASR #16 ; r12= t[6]
ADD r5, r12,r5, ASR #16 ; r5 = t2[6] = t[6]+t[5]
RSB r12,r5, r12,LSL #1 ; r12= t2[5] = t[6]-t[5]
ADD r11,r3, r11 ; r11= t2[0]+t[7] +8
ADD r5, r10,r5 ; r5 = t[1] +t2[6]+8
ADD r12,r6, r12 ; r12= t[2] +t2[5]+8
ADD r4, r9, r4 ; r4 = t2[3]+t[4] +8
RSB r3, r11,r3, LSL #1 ; r11= t2[0] - t[7] + 8
RSB r10,r5, r10,LSL #1 ; r5 = t[1] - t2[6] + 8
RSB r6, r12,r6, LSL #1 ; r6 = t[2] - t2[5] + 8
RSB r9, r4, r9, LSL #1 ; r4 = t2[3] - t[4] + 8
; TODO: This is wrong.
; The C code truncates to 16 bits by storing to RAM and doing the
; shifts later; we've got an extra 4 bits here.
MOV r11,r11,ASR #4
MOV r5, r5, ASR #4
MOV r12,r12,ASR #4
MOV r4, r4, ASR #4
MOV r9, r9, ASR #4
MOV r6, r6, ASR #4
MOV r10,r10,ASR #4
MOV r3, r3, ASR #4
STRH r11,[r0], #2 ; y[0] = t[0]+t[7]
STRH r5, [r0, #14] ; y[1] = t[1]+t2[6]
STRH r12,[r0, #30] ; y[2] = t[2]+t2[5]
STRH r4, [r0, #46] ; y[3] = t2[3]+t[4]
STRH r9, [r0, #62] ; y[4] = t2[3]-t[4]
STRH r6, [r0, #78] ; y[5] = t[2]-t2[5]
STRH r10,[r0, #94] ; y[6] = t[1]-t2[6]
STRH r3, [r0, #110] ; y[7] = t2[0]-t[7]
MOV PC,R14
ENDP
idct4core_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r9, [r1], #16 ; r9 = x[0]
LDR r10,OC_C4S4 ; r10= OC_C4S4
LDRSH r12,[r1, #-12] ; r12= x[2]
LDR r4, OC_C6S2 ; r4 = OC_C6S2
MUL r9, r10,r9 ; r9 = t[0]<<16 = OC_C4S4*x[0]
LDR r5, OC_C2S6 ; r5 = OC_C2S6
MUL r4, r12,r4 ; r4 = t[2]<<16 = OC_C6S2*x[2]
LDRSH r3, [r1, #-14] ; r3 = x[1]
MUL r5, r12,r5 ; r5 = t[3]<<16 = OC_C2S6*x[2]
LDR r6, OC_C7S1 ; r6 = OC_C7S1
LDR r12,OC_C1S7 ; r12= OC_C1S7
LDRSH r11,[r1, #-10] ; r11= x[3]
MUL r6, r3, r6 ; r6 = t[4]<<16 = OC_C7S1*x[1]
LDR r7, OC_C5S3 ; r7 = OC_C5S3
MUL r3, r12,r3 ; r3 = t[7]<<16 = OC_C1S7*x[1]
LDR r8, OC_C3S5 ; r8 = OC_C3S5
MUL r7, r11,r7 ; r7 = -t[5]<<16 = OC_C5S3*x[3]
MOV r9, r9, ASR #16 ; r9 = t[0]
MUL r11,r8, r11 ; r11= t[6]<<16 = OC_C3S5*x[3]
MOV r6, r6, ASR #16 ; r6 = t[4]
; TODO: This is wrong; t[4]-t[5] and t[7]-t[6] need to be truncated to 16-bit
; before multiplying, not after (this is not equivalent)
SUB r7, r6, r7, ASR #16 ; r7 = t2[4]=t[4]+t[5] (as r7=-t[5])
RSB r6, r7, r6, LSL #1 ; r6 = t[4]-t[5]
MUL r6, r10,r6 ; r6 = t2[5]<<16 =OC_C4S4*(t[4]-t[5])
MOV r3, r3, ASR #16 ; r3 = t[7]
ADD r11,r3, r11,ASR #16 ; r11= t2[7]=t[7]+t[6]
RSB r3, r11,r3, LSL #1 ; r3 = t[7]-t[6]
MUL r3, r10,r3 ; r3 = t2[6]<<16 =OC_C4S4*(t[7]-t[6])
ADD r4, r9, r4, ASR #16 ; r4 = t[1] = t[0] + t[2]
RSB r10,r4, r9, LSL #1 ; r10= t[2] = t[0] - t[2]
ADD r5, r9, r5, ASR #16 ; r5 = t[0] = t[0] + t[3]
RSB r9, r5, r9, LSL #1 ; r9 = t[3] = t[0] - t[3]
MOV r3, r3, ASR #16 ; r3 = t2[6]
ADD r6, r3, r6, ASR #16 ; r6 = t3[6] = t2[6]+t2[5]
RSB r3, r6, r3, LSL #1 ; r3 = t3[5] = t2[6]-t2[5]
ADD r11,r5, r11 ; r11= t[0]+t2[7]
ADD r6, r4, r6 ; r6 = t[1]+t3[6]
ADD r3, r10,r3 ; r3 = t[2]+t3[5]
ADD r7, r9, r7 ; r7 = t[3]+t2[4]
STRH r11,[r0], #2 ; y[0] = t[0]+t[7]
STRH r6, [r0, #14] ; y[1] = t[1]+t2[6]
STRH r3, [r0, #30] ; y[2] = t[2]+t2[5]
STRH r7, [r0, #46] ; y[3] = t2[3]+t[4]
RSB r11,r11,r5, LSL #1 ; r11= t[0]-t2[7]
RSB r6, r6, r4, LSL #1 ; r6 = t[1]-t3[6]
RSB r3, r3, r10,LSL #1 ; r3 = t[2]-t3[5]
RSB r7, r7, r9, LSL #1 ; r7 = t[3]-t2[4]
STRH r7, [r0, #62] ; y[4] = t2[3]-t[4]
STRH r3, [r0, #78] ; y[5] = t[2]-t2[5]
STRH r6, [r0, #94] ; y[6] = t[1]-t2[6]
STRH r11, [r0, #110] ; y[7] = t2[0]-t[7]
MOV PC,r14
ENDP
idct4core_down_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r9, [r1], #16 ; r9 = x[0]
LDR r10,OC_C4S4 ; r10= OC_C4S4
LDRSH r12,[r1, #-12] ; r12= x[2]
LDR r4, OC_C6S2 ; r4 = OC_C6S2
MUL r9, r10,r9 ; r9 = t[0]<<16 = OC_C4S4*x[0]
LDR r5, OC_C2S6 ; r5 = OC_C2S6
MUL r4, r12,r4 ; r4 = t[2]<<16 = OC_C6S2*x[2]
LDRSH r3, [r1, #-14] ; r3 = x[1]
MUL r5, r12,r5 ; r5 = t[3]<<16 = OC_C2S6*x[2]
LDR r6, OC_C7S1 ; r6 = OC_C7S1
LDR r12,OC_C1S7 ; r12= OC_C1S7
LDRSH r11,[r1, #-10] ; r11= x[3]
MUL r6, r3, r6 ; r6 = t[4]<<16 = OC_C7S1*x[1]
LDR r7, OC_C5S3 ; r7 = OC_C5S3
MUL r3, r12,r3 ; r3 = t[7]<<16 = OC_C1S7*x[1]
LDR r8, OC_C3S5 ; r8 = OC_C3S5
MUL r7, r11,r7 ; r7 = -t[5]<<16 = OC_C5S3*x[3]
MOV r9, r9, ASR #16 ; r9 = t[0]
MUL r11,r8, r11 ; r11= t[6]<<16 = OC_C3S5*x[3]
MOV r6, r6, ASR #16 ; r6 = t[4]
; TODO: This is wrong; t[4]-t[5] and t[7]-t[6] need to be truncated to 16-bit
; before multiplying, not after (this is not equivalent)
SUB r7, r6, r7, ASR #16 ; r7 = t2[4]=t[4]+t[5] (as r7=-t[5])
RSB r6, r7, r6, LSL #1 ; r6 = t[4]-t[5]
MUL r6, r10,r6 ; r6 = t2[5]<<16 =OC_C4S4*(t[4]-t[5])
MOV r3, r3, ASR #16 ; r3 = t[7]
ADD r11,r3, r11,ASR #16 ; r11= t2[7]=t[7]+t[6]
RSB r3, r11,r3, LSL #1 ; r3 = t[7]-t[6]
ADD r9, r9, #8 ; r9 = t[0]+8
MUL r3, r10,r3 ; r3 = t2[6]<<16 =OC_C4S4*(t[7]-t[6])
ADD r4, r9, r4, ASR #16 ; r4 = t[1] = t[0] + t[2] + 8
RSB r10,r4, r9, LSL #1 ; r10= t[2] = t[0] - t[2] + 8
ADD r5, r9, r5, ASR #16 ; r5 = t[0] = t[0] + t[3] + 8
RSB r9, r5, r9, LSL #1 ; r9 = t[3] = t[0] - t[3] + 8
MOV r3, r3, ASR #16 ; r3 = t2[6]
ADD r6, r3, r6, ASR #16 ; r6 = t3[6] = t2[6]+t2[5]
RSB r3, r6, r3, LSL #1 ; r3 = t3[5] = t2[6]-t2[5]
ADD r5, r5, r11 ; r5 = t[0]+t2[7]+8
ADD r4, r4, r6 ; r4 = t[1]+t3[6]+8
ADD r10,r10,r3 ; r10= t[2]+t3[5]+8
ADD r9, r9, r7 ; r9 = t[3]+t2[4]+8
SUB r11,r5, r11,LSL #1 ; r11= t[0]-t2[7]+8
SUB r6, r4, r6, LSL #1 ; r6 = t[1]-t3[6]+8
SUB r3, r10,r3, LSL #1 ; r3 = t[2]-t3[5]+8
SUB r7, r9, r7, LSL #1 ; r7 = t[3]-t2[4]+8
; TODO: This is wrong.
; The C code truncates to 16 bits by storing to RAM and doing the
; shifts later; we've got an extra 4 bits here.
MOV r11,r11,ASR #4
MOV r6, r6, ASR #4
MOV r3, r3, ASR #4
MOV r7, r7, ASR #4
MOV r9, r9, ASR #4
MOV r10,r10,ASR #4
MOV r4, r4, ASR #4
MOV r5, r5, ASR #4
STRH r5,[r0], #2 ; y[0] = t[0]+t[7]
STRH r4, [r0, #14] ; y[1] = t[1]+t2[6]
STRH r10,[r0, #30] ; y[2] = t[2]+t2[5]
STRH r9, [r0, #46] ; y[3] = t2[3]+t[4]
STRH r7, [r0, #62] ; y[4] = t2[3]-t[4]
STRH r3, [r0, #78] ; y[5] = t[2]-t2[5]
STRH r6, [r0, #94] ; y[6] = t[1]-t2[6]
STRH r11,[r0, #110] ; y[7] = t2[0]-t[7]
MOV PC,r14
ENDP
idct8core_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r2, [r1],#16 ; r2 = x[0]
STMFD r13!,{r1,r14}
LDRSH r6, [r1, #-8] ; r6 = x[4]
LDR r12,OC_C4S4 ; r12= C4S4
LDRSH r4, [r1, #-12] ; r4 = x[2]
ADD r2, r2, r6 ; r2 = x[0] + x[4]
SUB r6, r2, r6, LSL #1 ; r6 = x[0] - x[4]
; For spec compliance, these sums must be truncated to 16-bit precision
; _before_ the multiply (not after).
; Sadly, ARMv4 provides no simple way to do that.
MOV r2, r2, LSL #16
MOV r6, r6, LSL #16
MOV r2, r2, ASR #16
MOV r6, r6, ASR #16
MUL r2, r12,r2 ; r2 = t[0]<<16 = C4S4*(x[0]+x[4])
LDRSH r8, [r1, #-4] ; r8 = x[6]
LDR r7, OC_C6S2 ; r7 = OC_C6S2
MUL r6, r12,r6 ; r6 = t[1]<<16 = C4S4*(x[0]-x[4])
LDR r14,OC_C2S6 ; r14= OC_C2S6
MUL r3, r4, r7 ; r3 = OC_C6S2*x[2]
LDR r5, OC_C7S1 ; r5 = OC_C7S1
MUL r4, r14,r4 ; r4 = OC_C2S6*x[2]
MOV r3, r3, ASR #16 ; r3 = OC_C6S2*x[2]>>16
MUL r14,r8, r14 ; r14= OC_C2S6*x[6]
MOV r4, r4, ASR #16 ; r4 = OC_C2S6*x[2]>>16
MUL r8, r7, r8 ; r8 = OC_C6S2*x[6]
LDR r7, OC_C1S7 ; r7 = OC_C1S7
SUB r3, r3, r14,ASR #16 ; r3=t[2]=C6S2*x[2]>>16-C2S6*x[6]>>16
LDRSH r14,[r1, #-14] ; r14= x[1]
ADD r4, r4, r8, ASR #16 ; r4=t[3]=C2S6*x[2]>>16+C6S2*x[6]>>16
LDRSH r8, [r1, #-2] ; r8 = x[7]
MUL r9, r5, r14 ; r9 = OC_C7S1*x[1]
LDRSH r10,[r1, #-6] ; r10= x[5]
MUL r14,r7, r14 ; r14= OC_C1S7*x[1]
MOV r9, r9, ASR #16 ; r9 = OC_C7S1*x[1]>>16
MUL r7, r8, r7 ; r7 = OC_C1S7*x[7]
MOV r14,r14,ASR #16 ; r14= OC_C1S7*x[1]>>16
MUL r8, r5, r8 ; r8 = OC_C7S1*x[7]
LDRSH r1, [r1, #-10] ; r1 = x[3]
LDR r5, OC_C3S5 ; r5 = OC_C3S5
LDR r11,OC_C5S3 ; r11= OC_C5S3
ADD r8, r14,r8, ASR #16 ; r8=t[7]=C1S7*x[1]>>16+C7S1*x[7]>>16
MUL r14,r5, r10 ; r14= OC_C3S5*x[5]
SUB r9, r9, r7, ASR #16 ; r9=t[4]=C7S1*x[1]>>16-C1S7*x[7]>>16
MUL r10,r11,r10 ; r10= OC_C5S3*x[5]
MOV r14,r14,ASR #16 ; r14= OC_C3S5*x[5]>>16
MUL r11,r1, r11 ; r11= OC_C5S3*x[3]
MOV r10,r10,ASR #16 ; r10= OC_C5S3*x[5]>>16
MUL r1, r5, r1 ; r1 = OC_C3S5*x[3]
SUB r14,r14,r11,ASR #16 ;r14=t[5]=C3S5*x[5]>>16-C5S3*x[3]>>16
ADD r10,r10,r1, ASR #16 ;r10=t[6]=C5S3*x[5]>>16+C3S5*x[3]>>16
; r2=t[0]<<16 r3=t[2] r4=t[3] r6=t[1]<<16 r8=t[7] r9=t[4]
; r10=t[6] r12=C4S4 r14=t[5]
; TODO: This is wrong; t[4]-t[5] and t[7]-t[6] need to be truncated to 16-bit
; before multiplying, not after (this is not equivalent)
; Stage 2
; 4-5 butterfly
ADD r9, r9, r14 ; r9 = t2[4] = t[4]+t[5]
SUB r14,r9, r14, LSL #1 ; r14= t[4]-t[5]
MUL r14,r12,r14 ; r14= t2[5]<<16 = C4S4*(t[4]-t[5])
; 7-6 butterfly
ADD r8, r8, r10 ; r8 = t2[7] = t[7]+t[6]
SUB r10,r8, r10, LSL #1 ; r10= t[7]-t[6]
MUL r10,r12,r10 ; r10= t2[6]<<16 = C4S4*(t[7]+t[6])
; r2=t[0]<<16 r3=t[2] r4=t[3] r6=t[1]<<16 r8=t2[7] r9=t2[4]
; r10=t2[6]<<16 r12=C4S4 r14=t2[5]<<16
; Stage 3
; 0-3 butterfly
ADD r2, r4, r2, ASR #16 ; r2 = t2[0] = t[0] + t[3]
SUB r4, r2, r4, LSL #1 ; r4 = t2[3] = t[0] - t[3]
; 1-2 butterfly
ADD r6, r3, r6, ASR #16 ; r6 = t2[1] = t[1] + t[2]
SUB r3, r6, r3, LSL #1 ; r3 = t2[2] = t[1] - t[2]
; 6-5 butterfly
MOV r14,r14,ASR #16 ; r14= t2[5]
ADD r10,r14,r10,ASR #16 ; r10= t3[6] = t[6] + t[5]
SUB r14,r10,r14,LSL #1 ; r14= t3[5] = t[6] - t[5]
; r2=t2[0] r3=t2[2] r4=t2[3] r6=t2[1] r8=t2[7] r9=t2[4]
; r10=t3[6] r14=t3[5]
; Stage 4
ADD r2, r2, r8 ; r2 = t[0] + t[7]
ADD r6, r6, r10 ; r6 = t[1] + t[6]
ADD r3, r3, r14 ; r3 = t[2] + t[5]
ADD r4, r4, r9 ; r4 = t[3] + t[4]
SUB r8, r2, r8, LSL #1 ; r8 = t[0] - t[7]
SUB r10,r6, r10,LSL #1 ; r10= t[1] - t[6]
SUB r14,r3, r14,LSL #1 ; r14= t[2] - t[5]
SUB r9, r4, r9, LSL #1 ; r9 = t[3] - t[4]
STRH r2, [r0], #2 ; y[0] = t[0]+t[7]
STRH r6, [r0, #14] ; y[1] = t[1]+t[6]
STRH r3, [r0, #30] ; y[2] = t[2]+t[5]
STRH r4, [r0, #46] ; y[3] = t[3]+t[4]
STRH r9, [r0, #62] ; y[4] = t[3]-t[4]
STRH r14,[r0, #78] ; y[5] = t[2]-t[5]
STRH r10,[r0, #94] ; y[6] = t[1]-t[6]
STRH r8, [r0, #110] ; y[7] = t[0]-t[7]
LDMFD r13!,{r1,PC}
ENDP
idct8core_down_arm PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r2, [r1],#16 ; r2 = x[0]
STMFD r13!,{r1,r14}
LDRSH r6, [r1, #-8] ; r6 = x[4]
LDR r12,OC_C4S4 ; r12= C4S4
LDRSH r4, [r1, #-12] ; r4 = x[2]
ADD r2, r2, r6 ; r2 = x[0] + x[4]
SUB r6, r2, r6, LSL #1 ; r6 = x[0] - x[4]
; For spec compliance, these sums must be truncated to 16-bit precision
; _before_ the multiply (not after).
; Sadly, ARMv4 provides no simple way to do that.
MOV r2, r2, LSL #16
MOV r6, r6, LSL #16
MOV r2, r2, ASR #16
MOV r6, r6, ASR #16
MUL r2, r12,r2 ; r2 = t[0]<<16 = C4S4*(x[0]+x[4])
LDRSH r8, [r1, #-4] ; r8 = x[6]
LDR r7, OC_C6S2 ; r7 = OC_C6S2
MUL r6, r12,r6 ; r6 = t[1]<<16 = C4S4*(x[0]-x[4])
LDR r14,OC_C2S6 ; r14= OC_C2S6
MUL r3, r4, r7 ; r3 = OC_C6S2*x[2]
LDR r5, OC_C7S1 ; r5 = OC_C7S1
MUL r4, r14,r4 ; r4 = OC_C2S6*x[2]
MOV r3, r3, ASR #16 ; r3 = OC_C6S2*x[2]>>16
MUL r14,r8, r14 ; r14= OC_C2S6*x[6]
MOV r4, r4, ASR #16 ; r4 = OC_C2S6*x[2]>>16
MUL r8, r7, r8 ; r8 = OC_C6S2*x[6]
LDR r7, OC_C1S7 ; r7 = OC_C1S7
SUB r3, r3, r14,ASR #16 ; r3=t[2]=C6S2*x[2]>>16-C2S6*x[6]>>16
LDRSH r14,[r1, #-14] ; r14= x[1]
ADD r4, r4, r8, ASR #16 ; r4=t[3]=C2S6*x[2]>>16+C6S2*x[6]>>16
LDRSH r8, [r1, #-2] ; r8 = x[7]
MUL r9, r5, r14 ; r9 = OC_C7S1*x[1]
LDRSH r10,[r1, #-6] ; r10= x[5]
MUL r14,r7, r14 ; r14= OC_C1S7*x[1]
MOV r9, r9, ASR #16 ; r9 = OC_C7S1*x[1]>>16
MUL r7, r8, r7 ; r7 = OC_C1S7*x[7]
MOV r14,r14,ASR #16 ; r14= OC_C1S7*x[1]>>16
MUL r8, r5, r8 ; r8 = OC_C7S1*x[7]
LDRSH r1, [r1, #-10] ; r1 = x[3]
LDR r5, OC_C3S5 ; r5 = OC_C3S5
LDR r11,OC_C5S3 ; r11= OC_C5S3
ADD r8, r14,r8, ASR #16 ; r8=t[7]=C1S7*x[1]>>16+C7S1*x[7]>>16
MUL r14,r5, r10 ; r14= OC_C3S5*x[5]
SUB r9, r9, r7, ASR #16 ; r9=t[4]=C7S1*x[1]>>16-C1S7*x[7]>>16
MUL r10,r11,r10 ; r10= OC_C5S3*x[5]
MOV r14,r14,ASR #16 ; r14= OC_C3S5*x[5]>>16
MUL r11,r1, r11 ; r11= OC_C5S3*x[3]
MOV r10,r10,ASR #16 ; r10= OC_C5S3*x[5]>>16
MUL r1, r5, r1 ; r1 = OC_C3S5*x[3]
SUB r14,r14,r11,ASR #16 ;r14=t[5]=C3S5*x[5]>>16-C5S3*x[3]>>16
ADD r10,r10,r1, ASR #16 ;r10=t[6]=C5S3*x[5]>>16+C3S5*x[3]>>16
; r2=t[0]<<16 r3=t[2] r4=t[3] r6=t[1]<<16 r8=t[7] r9=t[4]
; r10=t[6] r12=C4S4 r14=t[5]
; Stage 2
; TODO: This is wrong; t[4]-t[5] and t[7]-t[6] need to be truncated to 16-bit
; before multiplying, not after (this is not equivalent)
; 4-5 butterfly
ADD r9, r9, r14 ; r9 = t2[4] = t[4]+t[5]
SUB r14,r9, r14, LSL #1 ; r14= t[4]-t[5]
MUL r14,r12,r14 ; r14= t2[5]<<16 = C4S4*(t[4]-t[5])
; 7-6 butterfly
ADD r8, r8, r10 ; r8 = t2[7] = t[7]+t[6]
SUB r10,r8, r10, LSL #1 ; r10= t[7]-t[6]
MUL r10,r12,r10 ; r10= t2[6]<<16 = C4S4*(t[7]+t[6])
; r2=t[0]<<16 r3=t[2] r4=t[3] r6=t[1]<<16 r8=t2[7] r9=t2[4]
; r10=t2[6]<<16 r12=C4S4 r14=t2[5]<<16
; Stage 3
ADD r2, r2, #8<<16 ; r2 = t[0]+8<<16
ADD r6, r6, #8<<16 ; r6 = t[1]+8<<16
; 0-3 butterfly
ADD r2, r4, r2, ASR #16 ; r2 = t2[0] = t[0] + t[3] + 8
SUB r4, r2, r4, LSL #1 ; r4 = t2[3] = t[0] - t[3] + 8
; 1-2 butterfly
ADD r6, r3, r6, ASR #16 ; r6 = t2[1] = t[1] + t[2] + 8
SUB r3, r6, r3, LSL #1 ; r3 = t2[2] = t[1] - t[2] + 8
; 6-5 butterfly
MOV r14,r14,ASR #16 ; r14= t2[5]
ADD r10,r14,r10,ASR #16 ; r10= t3[6] = t[6] + t[5]
SUB r14,r10,r14,LSL #1 ; r14= t3[5] = t[6] - t[5]
; r2=t2[0] r3=t2[2] r4=t2[3] r6=t2[1] r8=t2[7] r9=t2[4]
; r10=t3[6] r14=t3[5]
; Stage 4
ADD r2, r2, r8 ; r2 = t[0] + t[7] + 8
ADD r6, r6, r10 ; r6 = t[1] + t[6] + 8
ADD r3, r3, r14 ; r3 = t[2] + t[5] + 8
ADD r4, r4, r9 ; r4 = t[3] + t[4] + 8
SUB r8, r2, r8, LSL #1 ; r8 = t[0] - t[7] + 8
SUB r10,r6, r10,LSL #1 ; r10= t[1] - t[6] + 8
SUB r14,r3, r14,LSL #1 ; r14= t[2] - t[5] + 8
SUB r9, r4, r9, LSL #1 ; r9 = t[3] - t[4] + 8
; TODO: This is wrong.
; The C code truncates to 16 bits by storing to RAM and doing the
; shifts later; we've got an extra 4 bits here.
MOV r2, r2, ASR #4
MOV r6, r6, ASR #4
MOV r3, r3, ASR #4
MOV r4, r4, ASR #4
MOV r8, r8, ASR #4
MOV r10,r10,ASR #4
MOV r14,r14,ASR #4
MOV r9, r9, ASR #4
STRH r2, [r0], #2 ; y[0] = t[0]+t[7]
STRH r6, [r0, #14] ; y[1] = t[1]+t[6]
STRH r3, [r0, #30] ; y[2] = t[2]+t[5]
STRH r4, [r0, #46] ; y[3] = t[3]+t[4]
STRH r9, [r0, #62] ; y[4] = t[3]-t[4]
STRH r14,[r0, #78] ; y[5] = t[2]-t[5]
STRH r10,[r0, #94] ; y[6] = t[1]-t[6]
STRH r8, [r0, #110] ; y[7] = t[0]-t[7]
LDMFD r13!,{r1,PC}
ENDP
[ OC_ARM_ASM_MEDIA
EXPORT oc_idct8x8_1_v6
EXPORT oc_idct8x8_v6
oc_idct8x8_1_v6 PROC
; r0 = ogg_int16_t *_y
; r1 = ogg_uint16_t _dc
ORR r2, r1, r1, LSL #16
ORR r3, r1, r1, LSL #16
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
STRD r2, [r0], #8
MOV PC, r14
ENDP
oc_idct8x8_v6 PROC
; r0 = ogg_int16_t *_y
; r1 = ogg_int16_t *_x
; r2 = int _last_zzi
CMP r2, #3
BLE oc_idct8x8_3_v6
;CMP r2, #6
;BLE oc_idct8x8_6_v6
CMP r2, #10
BLE oc_idct8x8_10_v6
oc_idct8x8_slow_v6
STMFD r13!,{r4-r11,r14}
SUB r13,r13,#64*2
; Row transforms
STR r0, [r13,#-4]!
ADD r0, r13, #4 ; Write to temp storage.
BL idct8_8core_v6
BL idct8_8core_v6
BL idct8_8core_v6
BL idct8_8core_v6
LDR r0, [r13], #4 ; Write to the final destination.
; Clear input data for next block.
MOV r4, #0
MOV r5, #0
STRD r4, [r1,#-8*16]!
STRD r4, [r1,#8]
STRD r4, [r1,#16]
STRD r4, [r1,#24]
STRD r4, [r1,#32]
STRD r4, [r1,#40]
STRD r4, [r1,#48]
STRD r4, [r1,#56]
STRD r4, [r1,#64]
STRD r4, [r1,#72]
STRD r4, [r1,#80]
STRD r4, [r1,#88]
STRD r4, [r1,#96]
STRD r4, [r1,#104]
STRD r4, [r1,#112]
STRD r4, [r1,#120]
MOV r1, r13 ; And read from temp storage.
; Column transforms
BL idct8_8core_down_v6
BL idct8_8core_down_v6
BL idct8_8core_down_v6
BL idct8_8core_down_v6
ADD r13,r13,#64*2
LDMFD r13!,{r4-r11,PC}
ENDP
oc_idct8x8_10_v6 PROC
STMFD r13!,{r4-r11,r14}
SUB r13,r13,#64*2+4
; Row transforms
MOV r2, r13
STR r0, [r13,#-4]!
AND r0, r2, #4 ; Align the stack.
ADD r0, r0, r2 ; Write to temp storage.
BL idct4_3core_v6
BL idct2_1core_v6
LDR r0, [r13], #4 ; Write to the final destination.
; Clear input data for next block.
MOV r4, #0
MOV r5, #0
STRD r4, [r1,#-4*16]!
STRD r4, [r1,#16]
STR r4, [r1,#32]
STR r4, [r1,#48]
AND r1, r13,#4 ; Align the stack.
ADD r1, r1, r13 ; And read from temp storage.
; Column transforms
BL idct4_4core_down_v6
BL idct4_4core_down_v6
BL idct4_4core_down_v6
BL idct4_4core_down_v6
ADD r13,r13,#64*2+4
LDMFD r13!,{r4-r11,PC}
ENDP
oc_idct8x8_3_v6 PROC
STMFD r13!,{r4-r8,r14}
SUB r13,r13,#64*2
; Row transforms
MOV r8, r0
MOV r0, r13 ; Write to temp storage.
BL idct2_1core_v6
; Clear input data for next block.
MOV r4, #0
STR r4, [r1,#-2*16]!
STR r4, [r1,#16]
MOV r1, r13 ; Read from temp storage.
MOV r0, r8 ; Write to the final destination.
; Column transforms
BL idct2_2core_down_v6
BL idct2_2core_down_v6
BL idct2_2core_down_v6
BL idct2_2core_down_v6
ADD r13,r13,#64*2
LDMFD r13!,{r4-r8,PC}
ENDP
idct2_1core_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
; Stage 1:
LDR r2, [r1], #16 ; r2 = <x[0,1]|x[0,0]>
LDR r3, OC_C4S4
LDRSH r6, [r1], #16 ; r6 = x[1,0]
SMULWB r12,r3, r2 ; r12= t[0,0]=OC_C4S4*x[0,0]>>16
LDRD r4, r5, OC_C7S1 ; r4 = OC_C7S1; r5 = OC_C1S7
SMULWB r6, r3, r6 ; r6 = t[1,0]=OC_C4S4*x[1,0]>>16
SMULWT r4, r4, r2 ; r4 = t[0,4]=OC_C7S1*x[0,1]>>16
SMULWT r7, r5, r2 ; r7 = t[0,7]=OC_C1S7*x[0,1]>>16
; Stage 2:
SMULWB r5, r3, r4 ; r5 = t[0,5]=OC_C4S4*t[0,4]>>16
PKHBT r12,r12,r6, LSL #16 ; r12= <t[1,0]|t[0,0]>
SMULWB r6, r3, r7 ; r6 = t[0,6]=OC_C4S4*t[0,7]>>16
PKHBT r7, r7, r3 ; r7 = <0|t[0,7]>
; Stage 3:
PKHBT r5, r6, r5, LSL #16 ; r5 = <t[0,5]|t[0,6]>
PKHBT r4, r4, r3 ; r4 = <0|t[0,4]>
SASX r5, r5, r5 ; r5 = <t[0,6]+t[0,5]|t[0,6]-t[0,5]>
; Stage 4:
PKHTB r6, r3, r5, ASR #16 ; r6 = <0|t[0,6]>
PKHBT r5, r5, r3 ; r5 = <0|t[0,5]>
SADD16 r3, r12,r7 ; r3 = t[0]+t[7]
STR r3, [r0], #4 ; y[0<<3] = t[0]+t[7]
SADD16 r3, r12,r6 ; r3 = t[0]+t[6]
STR r3, [r0, #12] ; y[1<<3] = t[0]+t[6]
SADD16 r3, r12,r5 ; r3 = t[0]+t[5]
STR r3, [r0, #28] ; y[2<<3] = t[0]+t[5]
SADD16 r3, r12,r4 ; r3 = t[0]+t[4]
STR r3, [r0, #44] ; y[3<<3] = t[0]+t[4]
SSUB16 r4, r12,r4 ; r4 = t[0]-t[4]
STR r4, [r0, #60] ; y[4<<3] = t[0]-t[4]
SSUB16 r5, r12,r5 ; r5 = t[0]-t[5]
STR r5, [r0, #76] ; y[5<<3] = t[0]-t[5]
SSUB16 r6, r12,r6 ; r6 = t[0]-t[6]
STR r6, [r0, #92] ; y[6<<3] = t[0]-t[6]
SSUB16 r7, r12,r7 ; r7 = t[0]-t[7]
STR r7, [r0, #108] ; y[7<<3] = t[0]-t[7]
MOV PC,r14
ENDP
]
ALIGN 8
OC_C7S1
DCD 12785 ; 31F1
OC_C1S7
DCD 64277 ; FB15
OC_C6S2
DCD 25080 ; 61F8
OC_C2S6
DCD 60547 ; EC83
OC_C5S3
DCD 36410 ; 8E3A
OC_C3S5
DCD 54491 ; D4DB
OC_C4S4
DCD 46341 ; B505
[ OC_ARM_ASM_MEDIA
idct2_2core_down_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
; Stage 1:
LDR r2, [r1], #16 ; r2 = <x[0,1]|x[0,0]>
LDR r3, OC_C4S4
MOV r7 ,#8 ; r7 = 8
LDR r6, [r1], #16 ; r6 = <x[1,1]|x[1,0]>
SMLAWB r12,r3, r2, r7 ; r12= (t[0,0]=OC_C4S4*x[0,0]>>16)+8
LDRD r4, r5, OC_C7S1 ; r4 = OC_C7S1; r5 = OC_C1S7
SMLAWB r7, r3, r6, r7 ; r7 = (t[1,0]=OC_C4S4*x[1,0]>>16)+8
SMULWT r5, r5, r2 ; r2 = t[0,7]=OC_C1S7*x[0,1]>>16
PKHBT r12,r12,r7, LSL #16 ; r12= <t[1,0]+8|t[0,0]+8>
SMULWT r4, r4, r2 ; r4 = t[0,4]=OC_C7S1*x[0,1]>>16
; Here we cheat: row 1 had just a DC, so x[0,1]==x[1,1] by definition.
PKHBT r7, r5, r5, LSL #16 ; r7 = <t[0,7]|t[0,7]>
; Stage 2:
SMULWB r6, r3, r7 ; r6 = t[0,6]=OC_C4S4*t[0,7]>>16
PKHBT r4, r4, r4, LSL #16 ; r4 = <t[0,4]|t[0,4]>
SMULWT r2, r3, r7 ; r2 = t[1,6]=OC_C4S4*t[1,7]>>16
SMULWB r5, r3, r4 ; r5 = t[0,5]=OC_C4S4*t[0,4]>>16
PKHBT r6, r6, r2, LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWT r2, r3, r4 ; r2 = t[1,5]=OC_C4S4*t[1,4]>>16
PKHBT r2, r5, r2, LSL #16 ; r2 = <t[1,5]|t[0,5]>
; Stage 3:
SSUB16 r5, r6, r2 ; r5 = <t[1,6]-t[1,5]|t[0,6]-t[0,5]>
SADD16 r6, r6, r2 ; r6 = <t[1,6]+t[1,5]|t[0,6]+t[0,5]>
; Stage 4:
SADD16 r2, r12,r7 ; r2 = t[0]+t[7]+8
MOV r3, r2, ASR #4
MOV r2, r2, LSL #16
PKHTB r3, r3, r2, ASR #20 ; r3 = t[0]+t[7]+8>>4
STR r3, [r0], #4 ; y[0<<3] = t[0]+t[7]+8>>4
SADD16 r2, r12,r6 ; r2 = t[0]+t[6]+8
MOV r3, r2, ASR #4
MOV r2, r2, LSL #16
PKHTB r3, r3, r2, ASR #20 ; r3 = t[0]+t[6]+8>>4
STR r3, [r0, #12] ; y[1<<3] = t[0]+t[6]+8>>4
SADD16 r2, r12,r5 ; r2 = t[0]+t[5]+8
MOV r3, r2, ASR #4
MOV r2, r2, LSL #16
PKHTB r3, r3, r2, ASR #20 ; r3 = t[0]+t[5]+8>>4
STR r3, [r0, #28] ; y[2<<3] = t[0]+t[5]+8>>4
SADD16 r2, r12,r4 ; r2 = t[0]+t[4]+8
MOV r3, r2, ASR #4
MOV r2, r2, LSL #16
PKHTB r3, r3, r2, ASR #20 ; r3 = t[0]+t[4]+8>>4
STR r3, [r0, #44] ; y[3<<3] = t[0]+t[4]+8>>4
SSUB16 r4, r12,r4 ; r4 = t[0]-t[4]+8
MOV r3, r4, ASR #4
MOV r4, r4, LSL #16
PKHTB r3, r3, r4, ASR #20 ; r3 = t[0]-t[4]+8>>4
STR r3, [r0, #60] ; y[4<<3] = t[0]-t[4]+8>>4
SSUB16 r5, r12,r5 ; r5 = t[0]-t[5]+8
MOV r3, r5, ASR #4
MOV r5, r5, LSL #16
PKHTB r3, r3, r5, ASR #20 ; r3 = t[0]-t[5]+8>>4
STR r3, [r0, #76] ; y[5<<3] = t[0]-t[5]+8>>4
SSUB16 r6, r12,r6 ; r6 = t[0]-t[6]+8
MOV r3, r6, ASR #4
MOV r6, r6, LSL #16
PKHTB r3, r3, r6, ASR #20 ; r3 = t[0]-t[6]+8>>4
STR r3, [r0, #92] ; y[6<<3] = t[0]-t[6]+8>>4
SSUB16 r7, r12,r7 ; r7 = t[0]-t[7]+8
MOV r3, r7, ASR #4
MOV r7, r7, LSL #16
PKHTB r3, r3, r7, ASR #20 ; r3 = t[0]-t[7]+8>>4
STR r3, [r0, #108] ; y[7<<3] = t[0]-t[7]+8>>4
MOV PC,r14
ENDP
; In theory this should save ~75 cycles over oc_idct8x8_10, more than enough to
; pay for increased branch mis-prediction to get here, but in practice it
; doesn't seem to slow anything down to take it out, and it's less code this
; way.
[ 0
oc_idct8x8_6_v6 PROC
STMFD r13!,{r4-r8,r10,r11,r14}
SUB r13,r13,#64*2+4
; Row transforms
MOV r8, r0
AND r0, r13,#4 ; Align the stack.
ADD r0, r0, r13 ; Write to temp storage.
BL idct3_2core_v6
BL idct1core_v6
; Clear input data for next block.
MOV r4, #0
MOV r5, #0
STRD r4, [r1,#-3*16]!
STR r4, [r1,#16]
STR r4, [r1,#32]
AND r1, r13,#4 ; Align the stack.
MOV r0, r8 ; Write to the final destination.
ADD r1, r1, r13 ; And read from temp storage.
; Column transforms
BL idct3_3core_down_v6
BL idct3_3core_down_v6
BL idct3_3core_down_v6
BL idct3_3core_down_v6
ADD r13,r13,#64*2+4
LDMFD r13!,{r4-r8,r10,r11,PC}
ENDP
idct1core_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
LDRSH r3, [r1], #16
MOV r12,#0x05
ORR r12,r12,#0xB500
MUL r3, r12, r3
; Stall ?
MOV r3, r3, ASR #16
; Don't need to actually store the odd lines; they won't be read.
STRH r3, [r0], #2
STRH r3, [r0, #30]
STRH r3, [r0, #62]
STRH r3, [r0, #94]
MOV PC,R14
ENDP
idct3_2core_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
; Stage 1:
LDRD r4, [r1], #16 ; r4 = <x[0,1]|x[0,0]>; r5 = <*|x[0,2]>
LDRD r10, r11, OC_C6S2_3_v6 ; r10= OC_C6S2; r11= OC_C2S6
; Stall
SMULWB r3, r11,r5 ; r3 = t[0,3]=OC_C2S6*x[0,2]>>16
LDR r11,OC_C4S4
SMULWB r2, r10,r5 ; r2 = t[0,2]=OC_C6S2*x[0,2]>>16
LDR r5, [r1], #16 ; r5 = <x[1,1]|x[1,0]>
SMULWB r12,r11,r4 ; r12= (t[0,0]=OC_C4S4*x[0,0]>>16)
LDRD r6, OC_C7S1_3_v6 ; r6 = OC_C7S1; r7 = OC_C1S7
SMULWB r10,r11,r5 ; r10= (t[1,0]=OC_C4S4*x[1,0]>>16)
PKHBT r12,r12,r10,LSL #16 ; r12= <t[1,0]|t[0,0]>
SMULWT r10,r7, r5 ; r10= t[1,7]=OC_C1S7*x[1,1]>>16
PKHBT r2, r2, r11 ; r2 = <0|t[0,2]>
SMULWT r7, r7, r4 ; r7 = t[0,7]=OC_C1S7*x[0,1]>>16
PKHBT r3, r3, r11 ; r3 = <0|t[0,3]>
SMULWT r5, r6, r5 ; r10= t[1,4]=OC_C7S1*x[1,1]>>16
PKHBT r7, r7, r10,LSL #16 ; r7 = <t[1,7]|t[0,7]>
SMULWT r4, r6, r4 ; r4 = t[0,4]=OC_C7S1*x[0,1]>>16
; Stage 2:
SMULWB r6, r11,r7 ; r6 = t[0,6]=OC_C4S4*t[0,7]>>16
PKHBT r4, r4, r5, LSL #16 ; r4 = <t[1,4]|t[0,4]>
SMULWT r10,r11,r7 ; r10= t[1,6]=OC_C4S4*t[1,7]>>16
SMULWB r5, r11,r4 ; r5 = t[0,5]=OC_C4S4*t[0,4]>>16
PKHBT r6, r6, r10,LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWT r10,r11,r4 ; r10= t[1,5]=OC_C4S4*t[1,4]>>16
; Stage 3:
B idct4_3core_stage3_v6
ENDP
; Another copy so the LDRD offsets are less than +/- 255.
ALIGN 8
OC_C7S1_3_v6
DCD 12785 ; 31F1
OC_C1S7_3_v6
DCD 64277 ; FB15
OC_C6S2_3_v6
DCD 25080 ; 61F8
OC_C2S6_3_v6
DCD 60547 ; EC83
idct3_3core_down_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
; Stage 1:
LDRD r10,[r1], #16 ; r10= <x[0,1]|x[0,0]>; r11= <??|x[0,2]>
LDRD r6, OC_C6S2_3_v6 ; r6 = OC_C6S2; r7 = OC_C2S6
LDR r4, [r1], #16 ; r4 = <x[1,1]|x[1,0]>
SMULWB r3, r7, r11 ; r3 = t[0,3]=OC_C2S6*x[0,2]>>16
MOV r7,#8
SMULWB r2, r6, r11 ; r2 = t[0,2]=OC_C6S2*x[0,2]>>16
LDR r11,OC_C4S4
SMLAWB r12,r11,r10,r7 ; r12= t[0,0]+8=(OC_C4S4*x[0,0]>>16)+8
; Here we cheat: row 2 had just a DC, so x[0,2]==x[1,2] by definition.
PKHBT r3, r3, r3, LSL #16 ; r3 = <t[0,3]|t[0,3]>
SMLAWB r5, r11,r4, r7 ; r5 = t[1,0]+8=(OC_C4S4*x[1,0]>>16)+8
PKHBT r2, r2, r2, LSL #16 ; r2 = <t[0,2]|t[0,2]>
LDRD r6, OC_C7S1_3_v6 ; r6 = OC_C7S1; r7 = OC_C1S7
PKHBT r12,r12,r5, LSL #16 ; r12= <t[1,0]+8|t[0,0]+8>
SMULWT r5, r7, r4 ; r5 = t[1,7]=OC_C1S7*x[1,1]>>16
SMULWT r7, r7, r10 ; r7 = t[0,7]=OC_C1S7*x[0,1]>>16
SMULWT r10,r6, r10 ; r10= t[0,4]=OC_C7S1*x[0,1]>>16
PKHBT r7, r7, r5, LSL #16 ; r7 = <t[1,7]|t[0,7]>
SMULWT r4, r6, r4 ; r4 = t[1,4]=OC_C7S1*x[1,1]>>16
; Stage 2:
SMULWB r6, r11,r7 ; r6 = t[0,6]=OC_C4S4*t[0,7]>>16
PKHBT r4, r10,r4, LSL #16 ; r4 = <t[1,4]|t[0,4]>
SMULWT r10,r11,r7 ; r10= t[1,6]=OC_C4S4*t[1,7]>>16
SMULWB r5, r11,r4 ; r5 = t[0,5]=OC_C4S4*t[0,4]>>16
PKHBT r6, r6, r10,LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWT r10,r11,r4 ; r10= t[1,5]=OC_C4S4*t[1,4]>>16
; Stage 3:
B idct4_4core_down_stage3_v6
ENDP
]
idct4_3core_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
; Stage 1:
LDRD r10,[r1], #16 ; r10= <x[0,1]|x[0,0]>; r11= <x[0,3]|x[0,2]>
LDRD r2, r3, OC_C5S3_4_v6 ; r2 = OC_C5S3; r3 = OC_C3S5
LDRD r4, [r1], #16 ; r4 = <x[1,1]|x[1,0]>; r5 = <??|x[1,2]>
SMULWT r9, r3, r11 ; r9 = t[0,6]=OC_C3S5*x[0,3]>>16
SMULWT r8, r2, r11 ; r8 = -t[0,5]=OC_C5S3*x[0,3]>>16
PKHBT r9, r9, r2 ; r9 = <0|t[0,6]>
LDRD r6, r7, OC_C6S2_4_v6 ; r6 = OC_C6S2; r7 = OC_C2S6
PKHBT r8, r8, r2 ; r9 = <0|-t[0,5]>
SMULWB r3, r7, r11 ; r3 = t[0,3]=OC_C2S6*x[0,2]>>16
SMULWB r2, r6, r11 ; r2 = t[0,2]=OC_C6S2*x[0,2]>>16
LDR r11,OC_C4S4
SMULWB r12,r7, r5 ; r12= t[1,3]=OC_C2S6*x[1,2]>>16
SMULWB r5, r6, r5 ; r5 = t[1,2]=OC_C6S2*x[1,2]>>16
PKHBT r3, r3, r12,LSL #16 ; r3 = <t[1,3]|t[0,3]>
SMULWB r12,r11,r10 ; r12= t[0,0]=OC_C4S4*x[0,0]>>16
PKHBT r2, r2, r5, LSL #16 ; r2 = <t[1,2]|t[0,2]>
SMULWB r5, r11,r4 ; r5 = t[1,0]=OC_C4S4*x[1,0]>>16
LDRD r6, r7, OC_C7S1_4_v6 ; r6 = OC_C7S1; r7 = OC_C1S7
PKHBT r12,r12,r5, LSL #16 ; r12= <t[1,0]|t[0,0]>
SMULWT r5, r7, r4 ; r5 = t[1,7]=OC_C1S7*x[1,1]>>16
SMULWT r7, r7, r10 ; r7 = t[0,7]=OC_C1S7*x[0,1]>>16
SMULWT r10,r6, r10 ; r10= t[0,4]=OC_C7S1*x[0,1]>>16
PKHBT r7, r7, r5, LSL #16 ; r7 = <t[1,7]|t[0,7]>
SMULWT r4, r6, r4 ; r4 = t[1,4]=OC_C7S1*x[1,1]>>16
; Stage 2:
SSUB16 r6, r7, r9 ; r6 = t[7]-t[6]
PKHBT r4, r10,r4, LSL #16 ; r4 = <t[1,4]|t[0,4]>
SADD16 r7, r7, r9 ; r7 = t[7]=t[7]+t[6]
SMULWT r9, r11,r6 ; r9 = t[1,6]=OC_C4S4*r6T>>16
SADD16 r5, r4, r8 ; r5 = t[4]-t[5]
SMULWB r6, r11,r6 ; r6 = t[0,6]=OC_C4S4*r6B>>16
SSUB16 r4, r4, r8 ; r4 = t[4]=t[4]+t[5]
SMULWT r10,r11,r5 ; r10= t[1,5]=OC_C4S4*r5T>>16
PKHBT r6, r6, r9, LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWB r5, r11,r5 ; r5 = t[0,5]=OC_C4S4*r5B>>16
; Stage 3:
idct4_3core_stage3_v6
SADD16 r11,r12,r2 ; r11= t[1]=t[0]+t[2]
PKHBT r10,r5, r10,LSL #16 ; r10= <t[1,5]|t[0,5]>
SSUB16 r2, r12,r2 ; r2 = t[2]=t[0]-t[2]
idct4_3core_stage3_5_v6
SSUB16 r5, r6, r10 ; r5 = t[5]'=t[6]-t[5]
SADD16 r6, r6, r10 ; r6 = t[6]=t[6]+t[5]
SADD16 r10,r12,r3 ; r10= t[0]'=t[0]+t[3]
SSUB16 r3, r12,r3 ; r3 = t[3]=t[0]-t[3]
; Stage 4:
SADD16 r12,r10,r7 ; r12= t[0]+t[7]
STR r12,[r0], #4 ; y[0<<3] = t[0]+t[7]
SADD16 r12,r11,r6 ; r12= t[1]+t[6]
STR r12,[r0, #12] ; y[1<<3] = t[1]+t[6]
SADD16 r12,r2, r5 ; r12= t[2]+t[5]
STR r12,[r0, #28] ; y[2<<3] = t[2]+t[5]
SADD16 r12,r3, r4 ; r12= t[3]+t[4]
STR r12,[r0, #44] ; y[3<<3] = t[3]+t[4]
SSUB16 r4, r3, r4 ; r4 = t[3]-t[4]
STR r4, [r0, #60] ; y[4<<3] = t[3]-t[4]
SSUB16 r5, r2, r5 ; r5 = t[2]-t[5]
STR r5, [r0, #76] ; y[5<<3] = t[2]-t[5]
SSUB16 r6, r11,r6 ; r6 = t[1]-t[6]
STR r6, [r0, #92] ; y[6<<3] = t[1]-t[6]
SSUB16 r7, r10,r7 ; r7 = t[0]-t[7]
STR r7, [r0, #108] ; y[7<<3] = t[0]-t[7]
MOV PC,r14
ENDP
; Another copy so the LDRD offsets are less than +/- 255.
ALIGN 8
OC_C7S1_4_v6
DCD 12785 ; 31F1
OC_C1S7_4_v6
DCD 64277 ; FB15
OC_C6S2_4_v6
DCD 25080 ; 61F8
OC_C2S6_4_v6
DCD 60547 ; EC83
OC_C5S3_4_v6
DCD 36410 ; 8E3A
OC_C3S5_4_v6
DCD 54491 ; D4DB
idct4_4core_down_v6 PROC
; r0 = ogg_int16_t *_y (destination)
; r1 = const ogg_int16_t *_x (source)
; Stage 1:
LDRD r10,[r1], #16 ; r10= <x[0,1]|x[0,0]>; r11= <x[0,3]|x[0,2]>
LDRD r2, r3, OC_C5S3_4_v6 ; r2 = OC_C5S3; r3 = OC_C3S5
LDRD r4, [r1], #16 ; r4 = <x[1,1]|x[1,0]>; r5 = <x[1,3]|x[1,2]>
SMULWT r9, r3, r11 ; r9 = t[0,6]=OC_C3S5*x[0,3]>>16
LDRD r6, r7, OC_C6S2_4_v6 ; r6 = OC_C6S2; r7 = OC_C2S6
SMULWT r8, r2, r11 ; r8 = -t[0,5]=OC_C5S3*x[0,3]>>16
; Here we cheat: row 3 had just a DC, so x[0,3]==x[1,3] by definition.
PKHBT r9, r9, r9, LSL #16 ; r9 = <t[0,6]|t[0,6]>
SMULWB r3, r7, r11 ; r3 = t[0,3]=OC_C2S6*x[0,2]>>16
PKHBT r8, r8, r8, LSL #16 ; r8 = <-t[0,5]|-t[0,5]>
SMULWB r2, r6, r11 ; r2 = t[0,2]=OC_C6S2*x[0,2]>>16
LDR r11,OC_C4S4
SMULWB r12,r7, r5 ; r12= t[1,3]=OC_C2S6*x[1,2]>>16
MOV r7,#8
SMULWB r5, r6, r5 ; r5 = t[1,2]=OC_C6S2*x[1,2]>>16
PKHBT r3, r3, r12,LSL #16 ; r3 = <t[1,3]|t[0,3]>
SMLAWB r12,r11,r10,r7 ; r12= t[0,0]+8=(OC_C4S4*x[0,0]>>16)+8
PKHBT r2, r2, r5, LSL #16 ; r2 = <t[1,2]|t[0,2]>
SMLAWB r5, r11,r4 ,r7 ; r5 = t[1,0]+8=(OC_C4S4*x[1,0]>>16)+8
LDRD r6, r7, OC_C7S1_4_v6 ; r6 = OC_C7S1; r7 = OC_C1S7
PKHBT r12,r12,r5, LSL #16 ; r12= <t[1,0]+8|t[0,0]+8>
SMULWT r5, r7, r4 ; r5 = t[1,7]=OC_C1S7*x[1,1]>>16
SMULWT r7, r7, r10 ; r7 = t[0,7]=OC_C1S7*x[0,1]>>16
SMULWT r10,r6, r10 ; r10= t[0,4]=OC_C7S1*x[0,1]>>16
PKHBT r7, r7, r5, LSL #16 ; r7 = <t[1,7]|t[0,7]>
SMULWT r4, r6, r4 ; r4 = t[1,4]=OC_C7S1*x[1,1]>>16
; Stage 2:
SSUB16 r6, r7, r9 ; r6 = t[7]-t[6]
PKHBT r4, r10,r4, LSL #16 ; r4 = <t[1,4]|t[0,4]>
SADD16 r7, r7, r9 ; r7 = t[7]=t[7]+t[6]
SMULWT r9, r11,r6 ; r9 = t[1,6]=OC_C4S4*r6T>>16
SADD16 r5, r4, r8 ; r5 = t[4]-t[5]
SMULWB r6, r11,r6 ; r6 = t[0,6]=OC_C4S4*r6B>>16
SSUB16 r4, r4, r8 ; r4 = t[4]=t[4]+t[5]
SMULWT r10,r11,r5 ; r10= t[1,5]=OC_C4S4*r5T>>16
PKHBT r6, r6, r9, LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWB r5, r11,r5 ; r5 = t[0,5]=OC_C4S4*r5B>>16
; Stage 3:
idct4_4core_down_stage3_v6
SADD16 r11,r12,r2 ; r11= t[1]+8=t[0]+t[2]+8
PKHBT r10,r5, r10,LSL #16 ; r10= <t[1,5]|t[0,5]>
SSUB16 r2, r12,r2 ; r2 = t[2]+8=t[0]-t[2]+8
B idct8_8core_down_stage3_5_v6
ENDP
idct8_8core_v6 PROC
STMFD r13!,{r0,r14}
; Stage 1:
;5-6 rotation by 3pi/16
LDRD r10, r11, OC_C5S3_4_v6 ; r10= OC_C5S3, r11= OC_C3S5
LDR r4, [r1,#8] ; r4 = <x[0,5]|x[0,4]>
LDR r7, [r1,#24] ; r7 = <x[1,5]|x[1,4]>
SMULWT r5, r11,r4 ; r5 = OC_C3S5*x[0,5]>>16
LDR r0, [r1,#4] ; r0 = <x[0,3]|x[0,2]>
SMULWT r3, r11,r7 ; r3 = OC_C3S5*x[1,5]>>16
LDR r12,[r1,#20] ; r12= <x[1,3]|x[1,2]>
SMULWT r6, r11,r0 ; r6 = OC_C3S5*x[0,3]>>16
SMULWT r11,r11,r12 ; r11= OC_C3S5*x[1,3]>>16
SMLAWT r6, r10,r4, r6 ; r6 = t[0,6]=r6+(OC_C5S3*x[0,5]>>16)
PKHBT r5, r5, r3, LSL #16 ; r5 = <r3|r5>
SMLAWT r11,r10,r7, r11 ; r11= t[1,6]=r11+(OC_C5S3*x[1,5]>>16)
PKHBT r4, r4, r7, LSL #16 ; r4 = <x[1,4]|x[0,4]>
SMULWT r3, r10,r0 ; r3 = OC_C5S3*x[0,3]>>16
PKHBT r6, r6, r11,LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWT r8, r10,r12 ; r8 = OC_C5S3*x[1,3]>>16
;2-3 rotation by 6pi/16
LDRD r10, r11, OC_C6S2_4_v6 ; r10= OC_C6S2, r11= OC_C2S6
PKHBT r3, r3, r8, LSL #16 ; r3 = <r8|r3>
LDR r8, [r1,#12] ; r8 = <x[0,7]|x[0,6]>
SMULWB r2, r10,r0 ; r2 = OC_C6S2*x[0,2]>>16
SSUB16 r5, r5, r3 ; r5 = <t[1,5]|t[0,5]>
SMULWB r9, r10,r12 ; r9 = OC_C6S2*x[1,2]>>16
LDR r7, [r1,#28] ; r7 = <x[1,7]|x[1,6]>
SMULWB r3, r10,r8 ; r3 = OC_C6S2*x[0,6]>>16
SMULWB r10,r10,r7 ; r10= OC_C6S2*x[1,6]>>16
PKHBT r2, r2, r9, LSL #16 ; r2 = <r2|r9>
SMLAWB r3, r11,r0, r3 ; r3 = t[0,3]=r3+(OC_C2S6*x[0,2]>>16)
SMLAWB r10,r11,r12,r10 ; r10= t[1,3]=r10+(OC_C2S6*x[1,2]>>16)
SMULWB r9, r11,r8 ; r9 = OC_C2S6*x[0,6]>>16
PKHBT r3, r3, r10,LSL #16 ; r3 = <t[1,6]|t[0,6]>
SMULWB r12,r11,r7 ; r12= OC_C2S6*x[1,6]>>16
;4-7 rotation by 7pi/16
LDRD r10, r11, OC_C7S1_8_v6 ; r10= OC_C7S1, r11= OC_C1S7
PKHBT r9, r9, r12,LSL #16 ; r9 = <r9|r12>
LDR r0, [r1],#16 ; r0 = <x[0,1]|x[0,0]>
PKHTB r7, r7, r8, ASR #16 ; r7 = <x[1,7]|x[0,7]>
SSUB16 r2, r2, r9 ; r2 = <t[1,2]|t[0,2]>
SMULWB r9, r10,r7 ; r9 = OC_C7S1*x[0,7]>>16
LDR r14,[r1],#16 ; r14= <x[1,1]|x[1,0]>
SMULWT r12,r10,r7 ; r12= OC_C7S1*x[1,7]>>16
SMULWT r8, r10,r0 ; r8 = OC_C7S1*x[0,1]>>16
SMULWT r10,r10,r14 ; r10= OC_C7S1*x[1,1]>>16
SMLAWT r9, r11,r0, r9 ; r9 = t[0,7]=r9+(OC_C1S7*x[0,1]>>16)
PKHBT r8, r8, r10,LSL #16 ; r8 = <r12|r8>
SMLAWT r12,r11,r14,r12 ; r12= t[1,7]=r12+(OC_C1S7*x[1,1]>>16)
PKHBT r0, r0, r14,LSL #16 ; r0 = <x[1,0]|x[0,0]>
SMULWB r10,r11,r7 ; r10= OC_C1S7*x[0,6]>>16
PKHBT r9, r9, r12,LSL #16 ; r9 = <t[1,7]|t[0,7]>
SMULWT r12,r11,r7 ; r12= OC_C1S7*x[1,6]>>16
;0-1 butterfly
LDR r11,OC_C4S4
PKHBT r10,r10,r12,LSL #16 ; r10= <r12|r10>
SADD16 r7, r0, r4 ; r7 = x[0]+x[4]
SSUB16 r10,r8, r10 ; r10= <t[1,4]|t[0,4]>
SSUB16 r4, r0, r4 ; r4 = x[0]-x[4]
SMULWB r8, r11,r7 ; r8 = t[0,0]=OC_C4S4*r7B>>16
SMULWT r12,r11,r7 ; r12= t[1,0]=OC_C4S4*r7T>>16
SMULWB r7, r11,r4 ; r7 = t[0,1]=OC_C4S4*r4B>>16
PKHBT r12,r8, r12,LSL #16 ; r12= <t[1,0]|t[0,0]>
SMULWT r8, r11,r4 ; r8 = t[1,1]=OC_C4S4*r4T>>16
; Stage 2:
SADD16 r4, r10,r5 ; r4 = t[4]'=t[4]+t[5]
PKHBT r8, r7, r8, LSL #16 ; r8 = <t[1,0]|t[0,0]>
SSUB16 r5, r10,r5 ; r5 = t[4]-t[5]
SMULWB r10,r11,r5 ; r10= t[0,5]=OC_C4S4*r5B>>16
SADD16 r7, r9, r6 ; r7 = t[7]'=t[7]+t[6]
SMULWT r5, r11,r5 ; r5 = t[1,5]=OC_C4S4*r5T>>16
SSUB16 r6, r9, r6 ; r6 = t[7]-t[6]
SMULWB r9, r11,r6 ; r9 = t[0,6]=OC_C4S4*r6B>>16
PKHBT r10,r10,r5, LSL #16 ; r10= <t[1,5]|t[0,5]>
SMULWT r6, r11,r6 ; r6 = t[1,6]=OC_C4S4*r6T>>16
; Stage 3:
SADD16 r11,r8, r2 ; r11= t[1]'=t[1]+t[2]
PKHBT r6, r9, r6, LSL #16 ; r6 = <t[1,6]|t[0,6]>
SSUB16 r2, r8, r2 ; r2 = t[2]=t[1]-t[2]
LDMFD r13!,{r0,r14}
B idct4_3core_stage3_5_v6
ENDP
; Another copy so the LDRD offsets are less than +/- 255.
ALIGN 8
OC_C7S1_8_v6
DCD 12785 ; 31F1
OC_C1S7_8_v6
DCD 64277 ; FB15
OC_C6S2_8_v6
DCD 25080 ; 61F8
OC_C2S6_8_v6
DCD 60547 ; EC83
OC_C5S3_8_v6
DCD 36410 ; 8E3A
OC_C3S5_8_v6
DCD 54491 ; D4DB
idct8_8core_down_v6 PROC
STMFD r13!,{r0,r14}
; Stage 1:
;5-6 rotation by 3pi/16
LDRD r10, r11, OC_C5S3_8_v6 ; r10= OC_C5S3, r11= OC_C3S5
LDR r4, [r1,#8] ; r4 = <x[0,5]|x[0,4]>
LDR r7, [r1,#24] ; r7 = <x[1,5]|x[1,4]>
SMULWT r5, r11,r4 ; r5 = OC_C3S5*x[0,5]>>16
LDR r0, [r1,#4] ; r0 = <x[0,3]|x[0,2]>
SMULWT r3, r11,r7 ; r3 = OC_C3S5*x[1,5]>>16
LDR r12,[r1,#20] ; r12= <x[1,3]|x[1,2]>
SMULWT r6, r11,r0 ; r6 = OC_C3S5*x[0,3]>>16
SMULWT r11,r11,r12 ; r11= OC_C3S5*x[1,3]>>16
SMLAWT r6, r10,r4, r6 ; r6 = t[0,6]=r6+(OC_C5S3*x[0,5]>>16)
PKHBT r5, r5, r3, LSL #16 ; r5 = <r3|r5>
SMLAWT r11,r10,r7, r11 ; r11= t[1,6]=r11+(OC_C5S3*x[1,5]>>16)
PKHBT r4, r4, r7, LSL #16 ; r4 = <x[1,4]|x[0,4]>
SMULWT r3, r10,r0 ; r3 = OC_C5S3*x[0,3]>>16
PKHBT r6, r6, r11,LSL #16 ; r6 = <t[1,6]|t[0,6]>
SMULWT r8, r10,r12 ; r8 = OC_C5S3*x[1,3]>>16
;2-3 rotation by 6pi/16
LDRD r10, r11, OC_C6S2_8_v6 ; r10= OC_C6S2, r11= OC_C2S6
PKHBT r3, r3, r8, LSL #16 ; r3 = <r8|r3>
LDR r8, [r1,#12] ; r8 = <x[0,7]|x[0,6]>
SMULWB r2, r10,r0 ; r2 = OC_C6S2*x[0,2]>>16
SSUB16 r5, r5, r3 ; r5 = <t[1,5]|t[0,5]>
SMULWB r9, r10,r12 ; r9 = OC_C6S2*x[1,2]>>16
LDR r7, [r1,#28] ; r7 = <x[1,7]|x[1,6]>
SMULWB r3, r10,r8 ; r3 = OC_C6S2*x[0,6]>>16
SMULWB r10,r10,r7 ; r10= OC_C6S2*x[1,6]>>16
PKHBT r2, r2, r9, LSL #16 ; r2 = <r2|r9>
SMLAWB r3, r11,r0, r3 ; r3 = t[0,3]=r3+(OC_C2S6*x[0,2]>>16)
SMLAWB r10,r11,r12,r10 ; r10= t[1,3]=r10+(OC_C2S6*x[1,2]>>16)
SMULWB r9, r11,r8 ; r9 = OC_C2S6*x[0,6]>>16
PKHBT r3, r3, r10,LSL #16 ; r3 = <t[1,6]|t[0,6]>
SMULWB r12,r11,r7 ; r12= OC_C2S6*x[1,6]>>16
;4-7 rotation by 7pi/16
LDRD r10, r11, OC_C7S1_8_v6 ; r10= OC_C7S1, r11= OC_C1S7
PKHBT r9, r9, r12,LSL #16 ; r9 = <r9|r12>
LDR r0, [r1],#16 ; r0 = <x[0,1]|x[0,0]>
PKHTB r7, r7, r8, ASR #16 ; r7 = <x[1,7]|x[0,7]>
SSUB16 r2, r2, r9 ; r2 = <t[1,2]|t[0,2]>
SMULWB r9, r10,r7 ; r9 = OC_C7S1*x[0,7]>>16
LDR r14,[r1],#16 ; r14= <x[1,1]|x[1,0]>
SMULWT r12,r10,r7 ; r12= OC_C7S1*x[1,7]>>16
SMULWT r8, r10,r0 ; r8 = OC_C7S1*x[0,1]>>16
SMULWT r10,r10,r14 ; r10= OC_C7S1*x[1,1]>>16
SMLAWT r9, r11,r0, r9 ; r9 = t[0,7]=r9+(OC_C1S7*x[0,1]>>16)
PKHBT r8, r8, r10,LSL #16 ; r8 = <r12|r8>
SMLAWT r12,r11,r14,r12 ; r12= t[1,7]=r12+(OC_C1S7*x[1,1]>>16)
PKHBT r0, r0, r14,LSL #16 ; r0 = <x[1,0]|x[0,0]>
SMULWB r10,r11,r7 ; r10= OC_C1S7*x[0,6]>>16
PKHBT r9, r9, r12,LSL #16 ; r9 = <t[1,7]|t[0,7]>
SMULWT r12,r11,r7 ; r12= OC_C1S7*x[1,6]>>16
;0-1 butterfly
LDR r11,OC_C4S4
MOV r14,#8
PKHBT r10,r10,r12,LSL #16 ; r10= <r12|r10>
SADD16 r7, r0, r4 ; r7 = x[0]+x[4]
SSUB16 r10,r8, r10 ; r10= <t[1,4]|t[0,4]>
SMLAWB r8, r11,r7, r14 ; r8 = t[0,0]+8=(OC_C4S4*r7B>>16)+8
SSUB16 r4, r0, r4 ; r4 = x[0]-x[4]
SMLAWT r12,r11,r7, r14 ; r12= t[1,0]+8=(OC_C4S4*r7T>>16)+8
SMLAWB r7, r11,r4, r14 ; r7 = t[0,1]+8=(OC_C4S4*r4B>>16)+8
PKHBT r12,r8, r12,LSL #16 ; r12= <t[1,0]+8|t[0,0]+8>
SMLAWT r8, r11,r4, r14 ; r8 = t[1,1]+8=(OC_C4S4*r4T>>16)+8
; Stage 2:
SADD16 r4, r10,r5 ; r4 = t[4]'=t[4]+t[5]
PKHBT r8, r7, r8, LSL #16 ; r8 = <t[1,0]+8|t[0,0]+8>
SSUB16 r5, r10,r5 ; r5 = t[4]-t[5]
SMULWB r10,r11,r5 ; r10= t[0,5]=OC_C4S4*r5B>>16
SADD16 r7, r9, r6 ; r7 = t[7]'=t[7]+t[6]
SMULWT r5, r11,r5 ; r5 = t[1,5]=OC_C4S4*r5T>>16
SSUB16 r6, r9, r6 ; r6 = t[7]-t[6]
SMULWB r9, r11,r6 ; r9 = t[0,6]=OC_C4S4*r6B>>16
PKHBT r10,r10,r5, LSL #16 ; r10= <t[1,5]|t[0,5]>
SMULWT r6, r11,r6 ; r6 = t[1,6]=OC_C4S4*r6T>>16
; Stage 3:
SADD16 r11,r8, r2 ; r11= t[1]'+8=t[1]+t[2]+8
PKHBT r6, r9, r6, LSL #16 ; r6 = <t[1,6]|t[0,6]>
SSUB16 r2, r8, r2 ; r2 = t[2]+8=t[1]-t[2]+8
LDMFD r13!,{r0,r14}
idct8_8core_down_stage3_5_v6
SSUB16 r5, r6, r10 ; r5 = t[5]'=t[6]-t[5]
SADD16 r6, r6, r10 ; r6 = t[6]=t[6]+t[5]
SADD16 r10,r12,r3 ; r10= t[0]'+8=t[0]+t[3]+8
SSUB16 r3, r12,r3 ; r3 = t[3]+8=t[0]-t[3]+8
; Stage 4:
SADD16 r12,r10,r7 ; r12= t[0]+t[7]+8
SSUB16 r7, r10,r7 ; r7 = t[0]-t[7]+8
MOV r10,r12,ASR #4
MOV r12,r12,LSL #16
PKHTB r10,r10,r12,ASR #20 ; r10= t[0]+t[7]+8>>4
STR r10,[r0], #4 ; y[0<<3] = t[0]+t[7]+8>>4
SADD16 r12,r11,r6 ; r12= t[1]+t[6]+8
SSUB16 r6, r11,r6 ; r6 = t[1]-t[6]+8
MOV r10,r12,ASR #4
MOV r12,r12,LSL #16
PKHTB r10,r10,r12,ASR #20 ; r10= t[1]+t[6]+8>>4
STR r10,[r0, #12] ; y[1<<3] = t[1]+t[6]+8>>4
SADD16 r12,r2, r5 ; r12= t[2]+t[5]+8
SSUB16 r5, r2, r5 ; r5 = t[2]-t[5]+8
MOV r10,r12,ASR #4
MOV r12,r12,LSL #16
PKHTB r10,r10,r12,ASR #20 ; r10= t[2]+t[5]+8>>4
STR r10,[r0, #28] ; y[2<<3] = t[2]+t[5]+8>>4
SADD16 r12,r3, r4 ; r12= t[3]+t[4]+8
SSUB16 r4, r3, r4 ; r4 = t[3]-t[4]+8
MOV r10,r12,ASR #4
MOV r12,r12,LSL #16
PKHTB r10,r10,r12,ASR #20 ; r10= t[3]+t[4]+8>>4
STR r10,[r0, #44] ; y[3<<3] = t[3]+t[4]+8>>4
MOV r10,r4, ASR #4
MOV r4, r4, LSL #16
PKHTB r10,r10,r4, ASR #20 ; r10= t[3]-t[4]+8>>4
STR r10,[r0, #60] ; y[4<<3] = t[3]-t[4]+8>>4
MOV r10,r5, ASR #4
MOV r5, r5, LSL #16
PKHTB r10,r10,r5, ASR #20 ; r10= t[2]-t[5]+8>>4
STR r10,[r0, #76] ; y[5<<3] = t[2]-t[5]+8>>4
MOV r10,r6, ASR #4
MOV r6, r6, LSL #16
PKHTB r10,r10,r6, ASR #20 ; r10= t[1]-t[6]+8>>4
STR r10,[r0, #92] ; y[6<<3] = t[1]-t[6]+8>>4
MOV r10,r7, ASR #4
MOV r7, r7, LSL #16
PKHTB r10,r10,r7, ASR #20 ; r10= t[0]-t[7]+8>>4
STR r10,[r0, #108] ; y[7<<3] = t[0]-t[7]+8>>4
MOV PC,r14
ENDP
]
[ OC_ARM_ASM_NEON
EXPORT oc_idct8x8_1_neon
EXPORT oc_idct8x8_neon
ALIGN 16
OC_IDCT_CONSTS_NEON
DCW 8
DCW 64277 ; FB15 (C1S7)
DCW 60547 ; EC83 (C2S6)
DCW 54491 ; D4DB (C3S5)
DCW 46341 ; B505 (C4S4)
DCW 36410 ; 471D (C5S3)
DCW 25080 ; 30FC (C6S2)
DCW 12785 ; 31F1 (C7S1)
oc_idct8x8_1_neon PROC
; r0 = ogg_int16_t *_y
; r1 = ogg_uint16_t _dc
VDUP.S16 Q0, r1
VMOV Q1, Q0
VST1.64 {D0, D1, D2, D3}, [r0@128]!
VST1.64 {D0, D1, D2, D3}, [r0@128]!
VST1.64 {D0, D1, D2, D3}, [r0@128]!
VST1.64 {D0, D1, D2, D3}, [r0@128]
MOV PC, r14
ENDP
oc_idct8x8_neon PROC
; r0 = ogg_int16_t *_y
; r1 = ogg_int16_t *_x
; r2 = int _last_zzi
CMP r2, #10
BLE oc_idct8x8_10_neon
oc_idct8x8_slow_neon
VPUSH {D8-D15}
MOV r2, r1
ADR r3, OC_IDCT_CONSTS_NEON
; Row transforms (input is pre-transposed)
VLD1.64 {D16,D17,D18,D19}, [r2@128]!
VLD1.64 {D20,D21,D22,D23}, [r2@128]!
VLD1.64 {D24,D25,D26,D27}, [r2@128]!
VSUB.S16 Q1, Q8, Q12 ; Q8 = x[0]-x[4]
VLD1.64 {D28,D29,D30,D31}, [r2@128]
VADD.S16 Q8, Q8, Q12 ; Q1 = x[0]+x[4]
VLD1.64 {D0,D1}, [r3@128]
MOV r12, r14
BL oc_idct8x8_stage123_neon
; Stage 4
VSUB.S16 Q15,Q8, Q7 ; Q15 = y[7]=t[0]'-t[7]'
VADD.S16 Q8, Q8, Q7 ; Q8 = y[0]=t[0]'+t[7]'
VSUB.S16 Q14,Q9, Q3 ; Q14 = y[6]=t[1]'-t[6]''
VADD.S16 Q9, Q9, Q3 ; Q9 = y[1]=t[1]'+t[6]''
VSUB.S16 Q13,Q10,Q5 ; Q13 = y[5]=t[2]'-t[5]''
VADD.S16 Q10,Q10,Q5 ; Q10 = y[2]=t[2]'+t[5]''
VTRN.16 Q14,Q15
VSUB.S16 Q12,Q11,Q4 ; Q12 = y[4]=t[3]'-t[4]'
VADD.S16 Q11,Q11,Q4 ; Q11 = y[3]=t[3]'+t[4]'
; 8x8 Transpose
VTRN.16 Q8, Q9
VTRN.16 Q10,Q11
VTRN.16 Q12,Q13
VTRN.32 Q8, Q10
VTRN.32 Q9, Q11
VTRN.32 Q12,Q14
VTRN.32 Q13,Q15
VSWP D17,D24
VSUB.S16 Q1, Q8, Q12 ; Q8 = x[0]-x[4]
VSWP D19,D26
VADD.S16 Q8, Q8, Q12 ; Q1 = x[0]+x[4]
VSWP D21,D28
VSWP D23,D30
; Column transforms
BL oc_idct8x8_stage123_neon
; We have to put the return address back in the LR, or the branch
; predictor will not recognize the function return and mis-predict the
; entire call stack.
MOV r14, r12
; Stage 4
VSUB.S16 Q15,Q8, Q7 ; Q15 = y[7]=t[0]'-t[7]'
VADD.S16 Q8, Q8, Q7 ; Q8 = y[0]=t[0]'+t[7]'
VSUB.S16 Q14,Q9, Q3 ; Q14 = y[6]=t[1]'-t[6]''
VADD.S16 Q9, Q9, Q3 ; Q9 = y[1]=t[1]'+t[6]''
VSUB.S16 Q13,Q10,Q5 ; Q13 = y[5]=t[2]'-t[5]''
VADD.S16 Q10,Q10,Q5 ; Q10 = y[2]=t[2]'+t[5]''
VSUB.S16 Q12,Q11,Q4 ; Q12 = y[4]=t[3]'-t[4]'
VADD.S16 Q11,Q11,Q4 ; Q11 = y[3]=t[3]'+t[4]'
VMOV.I8 Q2,#0
VPOP {D8-D15}
VMOV.I8 Q3,#0
VRSHR.S16 Q8, Q8, #4 ; Q8 = y[0]+8>>4
VST1.64 {D4, D5, D6, D7}, [r1@128]!
VRSHR.S16 Q9, Q9, #4 ; Q9 = y[1]+8>>4
VRSHR.S16 Q10,Q10,#4 ; Q10 = y[2]+8>>4
VST1.64 {D4, D5, D6, D7}, [r1@128]!
VRSHR.S16 Q11,Q11,#4 ; Q11 = y[3]+8>>4
VRSHR.S16 Q12,Q12,#4 ; Q12 = y[4]+8>>4
VST1.64 {D4, D5, D6, D7}, [r1@128]!
VRSHR.S16 Q13,Q13,#4 ; Q13 = y[5]+8>>4
VRSHR.S16 Q14,Q14,#4 ; Q14 = y[6]+8>>4
VST1.64 {D4, D5, D6, D7}, [r1@128]
VRSHR.S16 Q15,Q15,#4 ; Q15 = y[7]+8>>4
VSTMIA r0, {D16-D31}
MOV PC, r14
ENDP
oc_idct8x8_stage123_neon PROC
; Stages 1 & 2
VMULL.S16 Q4, D18,D1[3]
VMULL.S16 Q5, D19,D1[3]
VMULL.S16 Q7, D30,D1[3]
VMULL.S16 Q6, D31,D1[3]
VMULL.S16 Q2, D30,D0[1]
VMULL.S16 Q3, D31,D0[1]
VSHRN.S32 D8, Q4, #16
VSHRN.S32 D9, Q5, #16 ; Q4 = (OC_C7S1*x[1]>>16)
VSHRN.S32 D14,Q7, #16
VSHRN.S32 D15,Q6, #16 ; Q7 = (OC_C7S1*x[7]>>16)
VSHRN.S32 D4, Q2, #16
VSHRN.S32 D5, Q3, #16 ; Q2 = (OC_C1S7*x[7]>>16)-x[7]
VSUB.S16 Q4, Q4, Q15
VADD.S16 Q7, Q7, Q9
VSUB.S16 Q4, Q4, Q2 ; Q4 = t[4]
VMULL.S16 Q2, D18,D0[1]
VMULL.S16 Q9, D19,D0[1]
VMULL.S16 Q5, D26,D0[3]
VMULL.S16 Q3, D27,D0[3]
VMULL.S16 Q6, D22,D0[3]
VMULL.S16 Q12,D23,D0[3]
VSHRN.S32 D4, Q2, #16
VSHRN.S32 D5, Q9, #16 ; Q2 = (OC_C1S7*x[1]>>16)-x[1]
VSHRN.S32 D10,Q5, #16
VSHRN.S32 D11,Q3, #16 ; Q5 = (OC_C3S5*x[5]>>16)-x[5]
VSHRN.S32 D12,Q6, #16
VSHRN.S32 D13,Q12,#16 ; Q6 = (OC_C3S5*x[3]>>16)-x[3]
VADD.S16 Q7, Q7, Q2 ; Q7 = t[7]
VSUB.S16 Q5, Q5, Q11
VADD.S16 Q6, Q6, Q11
VADD.S16 Q5, Q5, Q13
VADD.S16 Q6, Q6, Q13
VMULL.S16 Q9, D22,D1[1]
VMULL.S16 Q11,D23,D1[1]
VMULL.S16 Q15,D26,D1[1]
VMULL.S16 Q13,D27,D1[1]
VMULL.S16 Q2, D20,D1[2]
VMULL.S16 Q12,D21,D1[2]
VSHRN.S32 D18,Q9, #16
VSHRN.S32 D19,Q11,#16 ; Q9 = (OC_C5S3*x[3]>>16)-x[3]
VSHRN.S32 D30,Q15,#16
VSHRN.S32 D31,Q13,#16 ; Q15= (OC_C5S3*x[5]>>16)-x[5]
VSHRN.S32 D4, Q2, #16
VSHRN.S32 D5, Q12,#16 ; Q2 = (OC_C6S2*x[2]>>16)
VSUB.S16 Q5, Q5, Q9 ; Q5 = t[5]
VADD.S16 Q6, Q6, Q15 ; Q6 = t[6]
VSUB.S16 Q2, Q2, Q14
VMULL.S16 Q3, D28,D1[2]
VMULL.S16 Q11,D29,D1[2]
VMULL.S16 Q12,D28,D0[2]
VMULL.S16 Q9, D29,D0[2]
VMULL.S16 Q13,D20,D0[2]
VMULL.S16 Q15,D21,D0[2]
VSHRN.S32 D6, Q3, #16
VSHRN.S32 D7, Q11,#16 ; Q3 = (OC_C6S2*x[6]>>16)
VSHRN.S32 D24,Q12,#16
VSHRN.S32 D25,Q9, #16 ; Q12= (OC_C2S6*x[6]>>16)-x[6]
VSHRN.S32 D26,Q13,#16
VSHRN.S32 D27,Q15,#16 ; Q13= (OC_C2S6*x[2]>>16)-x[2]
VSUB.S16 Q9, Q4, Q5 ; Q9 = t[4]-t[5]
VSUB.S16 Q11,Q7, Q6 ; Q11= t[7]-t[6]
VADD.S16 Q3, Q3, Q10
VADD.S16 Q4, Q4, Q5 ; Q4 = t[4]'=t[4]+t[5]
VADD.S16 Q7, Q7, Q6 ; Q7 = t[7]'=t[7]+t[6]
VSUB.S16 Q2, Q2, Q12 ; Q2 = t[2]
VADD.S16 Q3, Q3, Q13 ; Q3 = t[3]
VMULL.S16 Q12,D16,D1[0]
VMULL.S16 Q13,D17,D1[0]
VMULL.S16 Q14,D2, D1[0]
VMULL.S16 Q15,D3, D1[0]
VMULL.S16 Q5, D18,D1[0]
VMULL.S16 Q6, D22,D1[0]
VSHRN.S32 D24,Q12,#16
VSHRN.S32 D25,Q13,#16
VSHRN.S32 D28,Q14,#16
VSHRN.S32 D29,Q15,#16
VMULL.S16 Q13,D19,D1[0]
VMULL.S16 Q15,D23,D1[0]
VADD.S16 Q8, Q8, Q12 ; Q8 = t[0]
VADD.S16 Q1, Q1, Q14 ; Q1 = t[1]
VSHRN.S32 D10,Q5, #16
VSHRN.S32 D12,Q6, #16
VSHRN.S32 D11,Q13,#16
VSHRN.S32 D13,Q15,#16
VADD.S16 Q5, Q5, Q9 ; Q5 = t[5]'=OC_C4S4*(t[4]-t[5])>>16
VADD.S16 Q6, Q6, Q11 ; Q6 = t[6]'=OC_C4S4*(t[7]-t[6])>>16
; Stage 3
VSUB.S16 Q11,Q8, Q3 ; Q11 = t[3]''=t[0]-t[3]
VADD.S16 Q8, Q8, Q3 ; Q8 = t[0]''=t[0]+t[3]
VADD.S16 Q9, Q1, Q2 ; Q9 = t[1]''=t[1]+t[2]
VADD.S16 Q3, Q6, Q5 ; Q3 = t[6]''=t[6]'+t[5]'
VSUB.S16 Q10,Q1, Q2 ; Q10 = t[2]''=t[1]-t[2]
VSUB.S16 Q5, Q6, Q5 ; Q5 = t[5]''=t[6]'-t[5]'
MOV PC, r14
ENDP
oc_idct8x8_10_neon PROC
ADR r3, OC_IDCT_CONSTS_NEON
VLD1.64 {D0,D1}, [r3@128]
MOV r2, r1
; Row transforms (input is pre-transposed)
; Stage 1
VLD1.64 {D16,D17,D18,D19},[r2@128]!
MOV r12, #16
VMULL.S16 Q15,D16,D1[0] ; Q15= OC_C4S4*x[0]-(x[0]<<16)
VLD1.64 {D17}, [r2@64], r12
VMULL.S16 Q2, D18,D0[1] ; Q2 = OC_C1S7*x[1]-(x[1]<<16)
VLD1.64 {D19}, [r2@64]
VMULL.S16 Q14,D17,D0[2] ; Q14= OC_C2S6*x[2]-(x[2]<<16)
VMULL.S16 Q3, D19,D0[3] ; Q3 = OC_C3S5*x[3]-(x[3]<<16)
VMULL.S16 Q13,D19,D1[1] ; Q13= OC_C5S3*x[3]-(x[3]<<16)
VMULL.S16 Q12,D18,D1[3] ; Q12= OC_C7S1*x[1]
VMULL.S16 Q1, D17,D1[2] ; Q1 = OC_C6S2*x[2]
VSHRN.S32 D30,Q15,#16 ; D30= t[0]-x[0]
VSHRN.S32 D4, Q2, #16 ; D4 = t[7]-x[1]
VSHRN.S32 D31,Q14,#16 ; D31= t[3]-x[2]
VSHRN.S32 D6, Q3, #16 ; D6 = t[6]-x[3]
VSHRN.S32 D7, Q13,#16 ; D7 = -t[5]-x[3]
VSHRN.S32 D5, Q12,#16 ; D5 = t[4]
VSHRN.S32 D2, Q1, #16 ; D2 = t[2]
VADD.S16 D4, D4, D18 ; D4 = t[7]
VADD.S16 D6, D6, D19 ; D6 = t[6]
VADD.S16 D7, D7, D19 ; D7 = -t[5]
VADD.S16 Q15,Q15,Q8 ; D30= t[0]
; D31= t[3]
; Stages 2 & 3
VSUB.S16 Q12,Q2, Q3 ; D24= t[7]-t[6]
; D25= t[4]'=t[4]+t[5]
VADD.S16 Q13,Q2, Q3 ; D26= t[7]'=t[7]+t[6]
; D27= t[4]-t[5]
VMULL.S16 Q11,D24,D1[0] ; Q11= OC_C4S4*(t[7]-t[6])
; -(t[7]-t[6]<<16)
VMULL.S16 Q14,D27,D1[0] ; Q14= OC_C4S4*(t[4]-t[5])
; -(t[4]-t[5]<<16)
VADD.S16 D16,D30,D31 ; D16= t[0]'=t[0]+t[3]
VSUB.S16 D17,D30,D2 ; D17= t[2]'=t[0]-t[2]
VADD.S16 D18,D30,D2 ; D18= t[1]'=t[0]+t[2]
VSHRN.S32 D22,Q11,#16 ; D22= (OC_C4S4*(t[7]-t[6])>>16)
; -(t[7]-t[6])
VSHRN.S32 D23,Q14,#16 ; D23= (OC_C4S4*(t[4]-t[5])>>16)
; -(t[4]-t[5])
VSUB.S16 D19,D30,D31 ; D19= t[3]'=t[0]-t[3]
VADD.S16 D22,D22,D24 ; D22= t[6]'=OC_C4S4*(t[7]-t[6])>>16
VADD.S16 D23,D23,D27 ; D23= t[5]'=OC_C4S4*(t[4]-t[5])>>16
VSUB.S16 D27,D22,D23 ; D27= t[5]''=t[6]'-t[5]'
VADD.S16 D24,D22,D23 ; D24= t[6]''=t[6]'+t[5]'
; Stage 4
VSUB.S16 Q11,Q8, Q13 ; D22= y[7]=t[0]'-t[7]'
; D23= y[5]=t[2]'-t[5]''
VSUB.S16 Q10,Q9, Q12 ; D20= y[6]=t[1]'-t[6]'
; D21= y[4]=t[3]'-t[4]''
VADD.S16 Q8, Q8, Q13 ; D16= y[0]=t[0]'+t[7]'
; D17= y[2]=t[2]'+t[5]''
VADD.S16 Q9, Q9, Q12 ; D18= y[1]=t[1]'-t[6]'
; D19= y[3]=t[3]'-t[4]''
; 8x4 transpose
VTRN.16 Q10,Q11 ; Q10= c5c4a5a4 c7c6a7a6
; Q11= d5d4b5b4 d7d6b7b6
VTRN.16 Q8, Q9 ; Q8 = c3c2a3a2 c1c0a1a0
; Q9 = d3d2b3b2 d1d0b1b0
VSWP D20,D21 ; Q10= c7c6a7a6 c5c4a5a4
VSWP D22,D23 ; Q11= d7d6b7b6 d5d4b5b4
VUZP.32 Q9, Q11 ; Q9 = b7b6b5b4 b3b2b1b0
; Q11= d7d6d5d4 d3d2d1d0
VMULL.S16 Q15,D18,D0[1]
VMULL.S16 Q13,D22,D1[1]
VUZP.32 Q8, Q10 ; Q8 = a7a6a5a4 a3a2a1a0
; Q10= c7c6c5c4 c3c2c1c0
; Column transforms
; Stages 1, 2, & 3
VMULL.S16 Q14,D19,D0[1] ; Q14:Q15= OC_C1S7*x[1]-(x[1]<<16)
VMULL.S16 Q12,D23,D1[1] ; Q12:Q13= OC_C5S3*x[3]-(x[3]<<16)
VMULL.S16 Q3, D22,D0[3]
VMULL.S16 Q2, D23,D0[3] ; Q2:Q3 = OC_C3S5*x[3]-(x[3]<<16)
VSHRN.S32 D30,Q15,#16
VSHRN.S32 D31,Q14,#16 ; Q15= (OC_C1S7*x[1]>>16)-x[1]
VSHRN.S32 D26,Q13,#16
VSHRN.S32 D27,Q12,#16 ; Q13= (OC_C5S3*x[3]>>16)-x[3]
VSHRN.S32 D28,Q3, #16
VSHRN.S32 D29,Q2, #16 ; Q14= (OC_C3S5*x[3]>>16)-x[3]
VADD.S16 Q15,Q15,Q9 ; Q15= t[7]
VADD.S16 Q13,Q13,Q11 ; Q13= -t[5]
VADD.S16 Q14,Q14,Q11 ; Q14= t[6]
VMULL.S16 Q12,D18,D1[3]
VMULL.S16 Q2, D19,D1[3] ; Q2:Q12= OC_C7S1*x[1]
VMULL.S16 Q1, D16,D1[0]
VMULL.S16 Q11,D17,D1[0] ; Q11:Q1 = OC_C4S4*x[0]-(x[0]<<16)
VMULL.S16 Q3, D20,D0[2]
VMULL.S16 Q9, D21,D0[2] ; Q9:Q3 = OC_C2S6*x[2]-(x[2]<<16)
VSHRN.S32 D24,Q12,#16
VSHRN.S32 D25,Q2, #16 ; Q12= t[4]
VMULL.S16 Q2, D20,D1[2]
VSHRN.S32 D2, Q1, #16
VSHRN.S32 D3, Q11,#16 ; Q1 = (OC_C4S4*x[0]>>16)-x[0]
VMULL.S16 Q11,D21,D1[2] ; Q2:Q11= OC_C6S2*x[2]
VSHRN.S32 D6, Q3, #16
VSHRN.S32 D7, Q9, #16 ; Q3 = (OC_C2S6*x[2]>>16)-x[2]
VSUB.S16 Q9, Q15,Q14 ; Q9 = t[7]-t[6]
VADD.S16 Q15,Q15,Q14 ; Q15= t[7]'=t[7]+t[6]
VSHRN.S32 D4, Q2, #16
VSHRN.S32 D5, Q11,#16 ; Q2 = t[2]
VADD.S16 Q1, Q1, Q8 ; Q1 = t[0]
VADD.S16 Q8, Q12,Q13 ; Q8 = t[4]-t[5]
VADD.S16 Q3, Q3, Q10 ; Q3 = t[3]
VMULL.S16 Q10,D16,D1[0]
VMULL.S16 Q11,D17,D1[0] ; Q11:Q10= OC_C4S4*(t[4]-t[5])
; -(t[4]-t[5]<<16)
VSUB.S16 Q12,Q12,Q13 ; Q12= t[4]'=t[4]+t[5]
VMULL.S16 Q14,D18,D1[0]
VMULL.S16 Q13,D19,D1[0] ; Q13:Q14= OC_C4S4*(t[6]-t[7])
; -(t[6]-t[7]<<16)
VSHRN.S32 D20,Q10,#16
VSHRN.S32 D21,Q11,#16 ; Q10= (OC_C4S4*(t[4]-t[5])>>16)
; -(t[4]-t[5])
VADD.S16 Q11,Q1, Q3 ; Q11= t[0]'=t[0]+t[3]
VSUB.S16 Q3, Q1, Q3 ; Q3 = t[3]'=t[0]-t[3]
VSHRN.S32 D28,Q14,#16
VSHRN.S32 D29,Q13,#16 ; Q14= (OC_C4S4*(t[7]-t[6])>>16)
; -(t[7]-t[6])
VADD.S16 Q10,Q10,Q8 ; Q10=t[5]'
VADD.S16 Q14,Q14,Q9 ; Q14=t[6]'
VSUB.S16 Q13,Q14,Q10 ; Q13=t[5]''=t[6]'-t[5]'
VADD.S16 Q14,Q14,Q10 ; Q14=t[6]''=t[6]'+t[5]'
VADD.S16 Q10,Q1, Q2 ; Q10= t[1]'=t[0]+t[2]
VSUB.S16 Q2, Q1, Q2 ; Q2 = t[2]'=t[0]-t[2]
; Stage 4
VADD.S16 Q8, Q11,Q15 ; Q8 = y[0]=t[0]'+t[7]'
VADD.S16 Q9, Q10,Q14 ; Q9 = y[1]=t[1]'+t[6]''
VSUB.S16 Q15,Q11,Q15 ; Q15 = y[7]=t[0]'-t[7]'
VSUB.S16 Q14,Q10,Q14 ; Q14 = y[6]=t[1]'-t[6]''
VADD.S16 Q10,Q2, Q13 ; Q10 = y[2]=t[2]'+t[5]''
VADD.S16 Q11,Q3, Q12 ; Q11 = y[3]=t[3]'+t[4]'
VSUB.S16 Q12,Q3, Q12 ; Q12 = y[4]=t[3]'-t[4]'
VSUB.S16 Q13,Q2, Q13 ; Q13 = y[5]=t[2]'-t[5]''
VMOV.I8 D2, #0
VRSHR.S16 Q8, Q8, #4 ; Q8 = y[0]+8>>4
VST1.64 {D2}, [r1@64], r12
VRSHR.S16 Q9, Q9, #4 ; Q9 = y[1]+8>>4
VRSHR.S16 Q10,Q10,#4 ; Q10 = y[2]+8>>4
VST1.64 {D2}, [r1@64], r12
VRSHR.S16 Q11,Q11,#4 ; Q11 = y[3]+8>>4
VRSHR.S16 Q12,Q12,#4 ; Q12 = y[4]+8>>4
VST1.64 {D2}, [r1@64], r12
VRSHR.S16 Q13,Q13,#4 ; Q13 = y[5]+8>>4
VRSHR.S16 Q14,Q14,#4 ; Q14 = y[6]+8>>4
VST1.64 {D2}, [r1@64]
VRSHR.S16 Q15,Q15,#4 ; Q15 = y[7]+8>>4
VSTMIA r0, {D16-D31}
MOV PC, r14
ENDP
]
END