mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 02:08:26 -05:00
384 lines
13 KiB
ArmAsm
384 lines
13 KiB
ArmAsm
|
/*
|
||
|
C-like prototype :
|
||
|
void j_rev_dct_arm(DCTBLOCK data)
|
||
|
|
||
|
With DCTBLOCK being a pointer to an array of 64 'signed shorts'
|
||
|
|
||
|
Copyright (c) 2001 Lionel Ulmer (lionel.ulmer@free.fr / bbrox@bbrox.org)
|
||
|
|
||
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
in the Software without restriction, including without limitation the rights
|
||
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
furnished to do so, subject to the following conditions:
|
||
|
|
||
|
The above copyright notice and this permission notice shall be included in
|
||
|
all copies or substantial portions of the Software.
|
||
|
|
||
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
||
|
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
||
|
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||
|
|
||
|
*/
|
||
|
|
||
|
#include "libavutil/arm/asm.S"
|
||
|
|
||
|
#define FIX_0_298631336 2446
|
||
|
#define FIX_0_541196100 4433
|
||
|
#define FIX_0_765366865 6270
|
||
|
#define FIX_1_175875602 9633
|
||
|
#define FIX_1_501321110 12299
|
||
|
#define FIX_2_053119869 16819
|
||
|
#define FIX_3_072711026 25172
|
||
|
#define FIX_M_0_390180644 -3196
|
||
|
#define FIX_M_0_899976223 -7373
|
||
|
#define FIX_M_1_847759065 -15137
|
||
|
#define FIX_M_1_961570560 -16069
|
||
|
#define FIX_M_2_562915447 -20995
|
||
|
#define FIX_0xFFFF 0xFFFF
|
||
|
|
||
|
#define FIX_0_298631336_ID 0
|
||
|
#define FIX_0_541196100_ID 4
|
||
|
#define FIX_0_765366865_ID 8
|
||
|
#define FIX_1_175875602_ID 12
|
||
|
#define FIX_1_501321110_ID 16
|
||
|
#define FIX_2_053119869_ID 20
|
||
|
#define FIX_3_072711026_ID 24
|
||
|
#define FIX_M_0_390180644_ID 28
|
||
|
#define FIX_M_0_899976223_ID 32
|
||
|
#define FIX_M_1_847759065_ID 36
|
||
|
#define FIX_M_1_961570560_ID 40
|
||
|
#define FIX_M_2_562915447_ID 44
|
||
|
#define FIX_0xFFFF_ID 48
|
||
|
|
||
|
function ff_j_rev_dct_arm, export=1
|
||
|
push {r0, r4 - r11, lr}
|
||
|
|
||
|
mov lr, r0 @ lr = pointer to the current row
|
||
|
mov r12, #8 @ r12 = row-counter
|
||
|
movrel r11, const_array @ r11 = base pointer to the constants array
|
||
|
row_loop:
|
||
|
ldrsh r0, [lr, # 0] @ r0 = 'd0'
|
||
|
ldrsh r2, [lr, # 2] @ r2 = 'd2'
|
||
|
|
||
|
@ Optimization for row that have all items except the first set to 0
|
||
|
@ (this works as the int16_t are always 4-byte aligned)
|
||
|
ldr r5, [lr, # 0]
|
||
|
ldr r6, [lr, # 4]
|
||
|
ldr r3, [lr, # 8]
|
||
|
ldr r4, [lr, #12]
|
||
|
orr r3, r3, r4
|
||
|
orr r3, r3, r6
|
||
|
orrs r5, r3, r5
|
||
|
beq end_of_row_loop @ nothing to be done as ALL of them are '0'
|
||
|
orrs r3, r3, r2
|
||
|
beq empty_row
|
||
|
|
||
|
ldrsh r1, [lr, # 8] @ r1 = 'd1'
|
||
|
ldrsh r4, [lr, # 4] @ r4 = 'd4'
|
||
|
ldrsh r6, [lr, # 6] @ r6 = 'd6'
|
||
|
|
||
|
ldr r3, [r11, #FIX_0_541196100_ID]
|
||
|
add r7, r2, r6
|
||
|
ldr r5, [r11, #FIX_M_1_847759065_ID]
|
||
|
mul r7, r3, r7 @ r7 = z1
|
||
|
ldr r3, [r11, #FIX_0_765366865_ID]
|
||
|
mla r6, r5, r6, r7 @ r6 = tmp2
|
||
|
add r5, r0, r4 @ r5 = tmp0
|
||
|
mla r2, r3, r2, r7 @ r2 = tmp3
|
||
|
sub r3, r0, r4 @ r3 = tmp1
|
||
|
|
||
|
add r0, r2, r5, lsl #13 @ r0 = tmp10
|
||
|
rsb r2, r2, r5, lsl #13 @ r2 = tmp13
|
||
|
add r4, r6, r3, lsl #13 @ r4 = tmp11
|
||
|
rsb r3, r6, r3, lsl #13 @ r3 = tmp12
|
||
|
|
||
|
push {r0, r2, r3, r4} @ save on the stack tmp10, tmp13, tmp12, tmp11
|
||
|
|
||
|
ldrsh r3, [lr, #10] @ r3 = 'd3'
|
||
|
ldrsh r5, [lr, #12] @ r5 = 'd5'
|
||
|
ldrsh r7, [lr, #14] @ r7 = 'd7'
|
||
|
|
||
|
add r0, r3, r5 @ r0 = 'z2'
|
||
|
add r2, r1, r7 @ r2 = 'z1'
|
||
|
add r4, r3, r7 @ r4 = 'z3'
|
||
|
add r6, r1, r5 @ r6 = 'z4'
|
||
|
ldr r9, [r11, #FIX_1_175875602_ID]
|
||
|
add r8, r4, r6 @ r8 = z3 + z4
|
||
|
ldr r10, [r11, #FIX_M_0_899976223_ID]
|
||
|
mul r8, r9, r8 @ r8 = 'z5'
|
||
|
ldr r9, [r11, #FIX_M_2_562915447_ID]
|
||
|
mul r2, r10, r2 @ r2 = 'z1'
|
||
|
ldr r10, [r11, #FIX_M_1_961570560_ID]
|
||
|
mul r0, r9, r0 @ r0 = 'z2'
|
||
|
ldr r9, [r11, #FIX_M_0_390180644_ID]
|
||
|
mla r4, r10, r4, r8 @ r4 = 'z3'
|
||
|
ldr r10, [r11, #FIX_0_298631336_ID]
|
||
|
mla r6, r9, r6, r8 @ r6 = 'z4'
|
||
|
ldr r9, [r11, #FIX_2_053119869_ID]
|
||
|
mla r7, r10, r7, r2 @ r7 = tmp0 + z1
|
||
|
ldr r10, [r11, #FIX_3_072711026_ID]
|
||
|
mla r5, r9, r5, r0 @ r5 = tmp1 + z2
|
||
|
ldr r9, [r11, #FIX_1_501321110_ID]
|
||
|
mla r3, r10, r3, r0 @ r3 = tmp2 + z2
|
||
|
add r7, r7, r4 @ r7 = tmp0
|
||
|
mla r1, r9, r1, r2 @ r1 = tmp3 + z1
|
||
|
add r5, r5, r6 @ r5 = tmp1
|
||
|
add r3, r3, r4 @ r3 = tmp2
|
||
|
add r1, r1, r6 @ r1 = tmp3
|
||
|
|
||
|
pop {r0, r2, r4, r6} @ r0 = tmp10 / r2 = tmp13 / r4 = tmp12 / r6 = tmp11
|
||
|
@ r1 = tmp3 / r3 = tmp2 / r5 = tmp1 / r7 = tmp0
|
||
|
|
||
|
@ Compute DESCALE(tmp10 + tmp3, CONST_BITS-PASS1_BITS)
|
||
|
add r8, r0, r1
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, # 0]
|
||
|
|
||
|
@ Compute DESCALE(tmp10 - tmp3, CONST_BITS-PASS1_BITS)
|
||
|
sub r8, r0, r1
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, #14]
|
||
|
|
||
|
@ Compute DESCALE(tmp11 + tmp2, CONST_BITS-PASS1_BITS)
|
||
|
add r8, r6, r3
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, # 2]
|
||
|
|
||
|
@ Compute DESCALE(tmp11 - tmp2, CONST_BITS-PASS1_BITS)
|
||
|
sub r8, r6, r3
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, #12]
|
||
|
|
||
|
@ Compute DESCALE(tmp12 + tmp1, CONST_BITS-PASS1_BITS)
|
||
|
add r8, r4, r5
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, # 4]
|
||
|
|
||
|
@ Compute DESCALE(tmp12 - tmp1, CONST_BITS-PASS1_BITS)
|
||
|
sub r8, r4, r5
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, #10]
|
||
|
|
||
|
@ Compute DESCALE(tmp13 + tmp0, CONST_BITS-PASS1_BITS)
|
||
|
add r8, r2, r7
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, # 6]
|
||
|
|
||
|
@ Compute DESCALE(tmp13 - tmp0, CONST_BITS-PASS1_BITS)
|
||
|
sub r8, r2, r7
|
||
|
add r8, r8, #(1<<10)
|
||
|
mov r8, r8, asr #11
|
||
|
strh r8, [lr, # 8]
|
||
|
|
||
|
@ End of row loop
|
||
|
add lr, lr, #16
|
||
|
subs r12, r12, #1
|
||
|
bne row_loop
|
||
|
beq start_column_loop
|
||
|
|
||
|
empty_row:
|
||
|
ldr r1, [r11, #FIX_0xFFFF_ID]
|
||
|
mov r0, r0, lsl #2
|
||
|
and r0, r0, r1
|
||
|
add r0, r0, r0, lsl #16
|
||
|
str r0, [lr, # 0]
|
||
|
str r0, [lr, # 4]
|
||
|
str r0, [lr, # 8]
|
||
|
str r0, [lr, #12]
|
||
|
|
||
|
end_of_row_loop:
|
||
|
@ End of loop
|
||
|
add lr, lr, #16
|
||
|
subs r12, r12, #1
|
||
|
bne row_loop
|
||
|
|
||
|
start_column_loop:
|
||
|
@ Start of column loop
|
||
|
pop {lr}
|
||
|
mov r12, #8
|
||
|
column_loop:
|
||
|
ldrsh r0, [lr, #( 0*8)] @ r0 = 'd0'
|
||
|
ldrsh r2, [lr, #( 4*8)] @ r2 = 'd2'
|
||
|
ldrsh r4, [lr, #( 8*8)] @ r4 = 'd4'
|
||
|
ldrsh r6, [lr, #(12*8)] @ r6 = 'd6'
|
||
|
|
||
|
ldr r3, [r11, #FIX_0_541196100_ID]
|
||
|
add r1, r2, r6
|
||
|
ldr r5, [r11, #FIX_M_1_847759065_ID]
|
||
|
mul r1, r3, r1 @ r1 = z1
|
||
|
ldr r3, [r11, #FIX_0_765366865_ID]
|
||
|
mla r6, r5, r6, r1 @ r6 = tmp2
|
||
|
add r5, r0, r4 @ r5 = tmp0
|
||
|
mla r2, r3, r2, r1 @ r2 = tmp3
|
||
|
sub r3, r0, r4 @ r3 = tmp1
|
||
|
|
||
|
add r0, r2, r5, lsl #13 @ r0 = tmp10
|
||
|
rsb r2, r2, r5, lsl #13 @ r2 = tmp13
|
||
|
add r4, r6, r3, lsl #13 @ r4 = tmp11
|
||
|
rsb r6, r6, r3, lsl #13 @ r6 = tmp12
|
||
|
|
||
|
ldrsh r1, [lr, #( 2*8)] @ r1 = 'd1'
|
||
|
ldrsh r3, [lr, #( 6*8)] @ r3 = 'd3'
|
||
|
ldrsh r5, [lr, #(10*8)] @ r5 = 'd5'
|
||
|
ldrsh r7, [lr, #(14*8)] @ r7 = 'd7'
|
||
|
|
||
|
@ Check for empty odd column (happens about 20 to 25 % of the time according to my stats)
|
||
|
orr r9, r1, r3
|
||
|
orr r10, r5, r7
|
||
|
orrs r10, r9, r10
|
||
|
beq empty_odd_column
|
||
|
|
||
|
push {r0, r2, r4, r6} @ save on the stack tmp10, tmp13, tmp12, tmp11
|
||
|
|
||
|
add r0, r3, r5 @ r0 = 'z2'
|
||
|
add r2, r1, r7 @ r2 = 'z1'
|
||
|
add r4, r3, r7 @ r4 = 'z3'
|
||
|
add r6, r1, r5 @ r6 = 'z4'
|
||
|
ldr r9, [r11, #FIX_1_175875602_ID]
|
||
|
add r8, r4, r6
|
||
|
ldr r10, [r11, #FIX_M_0_899976223_ID]
|
||
|
mul r8, r9, r8 @ r8 = 'z5'
|
||
|
ldr r9, [r11, #FIX_M_2_562915447_ID]
|
||
|
mul r2, r10, r2 @ r2 = 'z1'
|
||
|
ldr r10, [r11, #FIX_M_1_961570560_ID]
|
||
|
mul r0, r9, r0 @ r0 = 'z2'
|
||
|
ldr r9, [r11, #FIX_M_0_390180644_ID]
|
||
|
mla r4, r10, r4, r8 @ r4 = 'z3'
|
||
|
ldr r10, [r11, #FIX_0_298631336_ID]
|
||
|
mla r6, r9, r6, r8 @ r6 = 'z4'
|
||
|
ldr r9, [r11, #FIX_2_053119869_ID]
|
||
|
mla r7, r10, r7, r2 @ r7 = tmp0 + z1
|
||
|
ldr r10, [r11, #FIX_3_072711026_ID]
|
||
|
mla r5, r9, r5, r0 @ r5 = tmp1 + z2
|
||
|
ldr r9, [r11, #FIX_1_501321110_ID]
|
||
|
mla r3, r10, r3, r0 @ r3 = tmp2 + z2
|
||
|
add r7, r7, r4 @ r7 = tmp0
|
||
|
mla r1, r9, r1, r2 @ r1 = tmp3 + z1
|
||
|
add r5, r5, r6 @ r5 = tmp1
|
||
|
add r3, r3, r4 @ r3 = tmp2
|
||
|
add r1, r1, r6 @ r1 = tmp3
|
||
|
|
||
|
pop {r0, r2, r4, r6} @ r0 = tmp10 / r2 = tmp13 / r4 = tmp11 / r6 = tmp12
|
||
|
@ r1 = tmp3 / r3 = tmp2 / r5 = tmp1 / r7 = tmp0
|
||
|
|
||
|
@ Compute DESCALE(tmp10 + tmp3, CONST_BITS+PASS1_BITS+3)
|
||
|
add r8, r0, r1
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #( 0*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp10 - tmp3, CONST_BITS+PASS1_BITS+3)
|
||
|
sub r8, r0, r1
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #(14*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp11 + tmp2, CONST_BITS+PASS1_BITS+3)
|
||
|
add r8, r4, r3
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #( 2*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp11 - tmp2, CONST_BITS+PASS1_BITS+3)
|
||
|
sub r8, r4, r3
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #(12*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp12 + tmp1, CONST_BITS+PASS1_BITS+3)
|
||
|
add r8, r6, r5
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #( 4*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp12 - tmp1, CONST_BITS+PASS1_BITS+3)
|
||
|
sub r8, r6, r5
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #(10*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp13 + tmp0, CONST_BITS+PASS1_BITS+3)
|
||
|
add r8, r2, r7
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #( 6*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp13 - tmp0, CONST_BITS+PASS1_BITS+3)
|
||
|
sub r8, r2, r7
|
||
|
add r8, r8, #(1<<17)
|
||
|
mov r8, r8, asr #18
|
||
|
strh r8, [lr, #( 8*8)]
|
||
|
|
||
|
@ End of row loop
|
||
|
add lr, lr, #2
|
||
|
subs r12, r12, #1
|
||
|
bne column_loop
|
||
|
beq the_end
|
||
|
|
||
|
empty_odd_column:
|
||
|
@ Compute DESCALE(tmp10 + tmp3, CONST_BITS+PASS1_BITS+3)
|
||
|
@ Compute DESCALE(tmp10 - tmp3, CONST_BITS+PASS1_BITS+3)
|
||
|
add r0, r0, #(1<<17)
|
||
|
mov r0, r0, asr #18
|
||
|
strh r0, [lr, #( 0*8)]
|
||
|
strh r0, [lr, #(14*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp11 + tmp2, CONST_BITS+PASS1_BITS+3)
|
||
|
@ Compute DESCALE(tmp11 - tmp2, CONST_BITS+PASS1_BITS+3)
|
||
|
add r4, r4, #(1<<17)
|
||
|
mov r4, r4, asr #18
|
||
|
strh r4, [lr, #( 2*8)]
|
||
|
strh r4, [lr, #(12*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp12 + tmp1, CONST_BITS+PASS1_BITS+3)
|
||
|
@ Compute DESCALE(tmp12 - tmp1, CONST_BITS+PASS1_BITS+3)
|
||
|
add r6, r6, #(1<<17)
|
||
|
mov r6, r6, asr #18
|
||
|
strh r6, [lr, #( 4*8)]
|
||
|
strh r6, [lr, #(10*8)]
|
||
|
|
||
|
@ Compute DESCALE(tmp13 + tmp0, CONST_BITS+PASS1_BITS+3)
|
||
|
@ Compute DESCALE(tmp13 - tmp0, CONST_BITS+PASS1_BITS+3)
|
||
|
add r2, r2, #(1<<17)
|
||
|
mov r2, r2, asr #18
|
||
|
strh r2, [lr, #( 6*8)]
|
||
|
strh r2, [lr, #( 8*8)]
|
||
|
|
||
|
@ End of row loop
|
||
|
add lr, lr, #2
|
||
|
subs r12, r12, #1
|
||
|
bne column_loop
|
||
|
|
||
|
the_end:
|
||
|
@ The end....
|
||
|
pop {r4 - r11, pc}
|
||
|
endfunc
|
||
|
|
||
|
const const_array
|
||
|
.word FIX_0_298631336
|
||
|
.word FIX_0_541196100
|
||
|
.word FIX_0_765366865
|
||
|
.word FIX_1_175875602
|
||
|
.word FIX_1_501321110
|
||
|
.word FIX_2_053119869
|
||
|
.word FIX_3_072711026
|
||
|
.word FIX_M_0_390180644
|
||
|
.word FIX_M_0_899976223
|
||
|
.word FIX_M_1_847759065
|
||
|
.word FIX_M_1_961570560
|
||
|
.word FIX_M_2_562915447
|
||
|
.word FIX_0xFFFF
|
||
|
endconst
|