148 строки
4.5 KiB
NASM
148 строки
4.5 KiB
NASM
;
|
|
; Copyright (c) 2016, Alliance for Open Media. All rights reserved
|
|
;
|
|
; This source code is subject to the terms of the BSD 2 Clause License and
|
|
; the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
|
|
; was not distributed with this source code in the LICENSE file, you can
|
|
; obtain it at www.aomedia.org/license/software. If the Alliance for Open
|
|
; Media Patent License 1.0 was not distributed with this source code in the
|
|
; PATENTS file, you can obtain it at www.aomedia.org/license/patent.
|
|
;
|
|
|
|
|
|
EXPORT |aom_idct32x32_1_add_neon|
|
|
ARM
|
|
REQUIRE8
|
|
PRESERVE8
|
|
|
|
AREA ||.text||, CODE, READONLY, ALIGN=2
|
|
|
|
;TODO(hkuang): put the following macros in a seperate
|
|
;file so other idct function could also use them.
|
|
MACRO
|
|
LD_16x8 $src, $stride
|
|
vld1.8 {q8}, [$src], $stride
|
|
vld1.8 {q9}, [$src], $stride
|
|
vld1.8 {q10}, [$src], $stride
|
|
vld1.8 {q11}, [$src], $stride
|
|
vld1.8 {q12}, [$src], $stride
|
|
vld1.8 {q13}, [$src], $stride
|
|
vld1.8 {q14}, [$src], $stride
|
|
vld1.8 {q15}, [$src], $stride
|
|
MEND
|
|
|
|
MACRO
|
|
ADD_DIFF_16x8 $diff
|
|
vqadd.u8 q8, q8, $diff
|
|
vqadd.u8 q9, q9, $diff
|
|
vqadd.u8 q10, q10, $diff
|
|
vqadd.u8 q11, q11, $diff
|
|
vqadd.u8 q12, q12, $diff
|
|
vqadd.u8 q13, q13, $diff
|
|
vqadd.u8 q14, q14, $diff
|
|
vqadd.u8 q15, q15, $diff
|
|
MEND
|
|
|
|
MACRO
|
|
SUB_DIFF_16x8 $diff
|
|
vqsub.u8 q8, q8, $diff
|
|
vqsub.u8 q9, q9, $diff
|
|
vqsub.u8 q10, q10, $diff
|
|
vqsub.u8 q11, q11, $diff
|
|
vqsub.u8 q12, q12, $diff
|
|
vqsub.u8 q13, q13, $diff
|
|
vqsub.u8 q14, q14, $diff
|
|
vqsub.u8 q15, q15, $diff
|
|
MEND
|
|
|
|
MACRO
|
|
ST_16x8 $dst, $stride
|
|
vst1.8 {q8}, [$dst], $stride
|
|
vst1.8 {q9}, [$dst], $stride
|
|
vst1.8 {q10},[$dst], $stride
|
|
vst1.8 {q11},[$dst], $stride
|
|
vst1.8 {q12},[$dst], $stride
|
|
vst1.8 {q13},[$dst], $stride
|
|
vst1.8 {q14},[$dst], $stride
|
|
vst1.8 {q15},[$dst], $stride
|
|
MEND
|
|
|
|
;void aom_idct32x32_1_add_neon(int16_t *input, uint8_t *dest,
|
|
; int dest_stride)
|
|
;
|
|
; r0 int16_t input
|
|
; r1 uint8_t *dest
|
|
; r2 int dest_stride
|
|
|
|
|aom_idct32x32_1_add_neon| PROC
|
|
push {lr}
|
|
pld [r1]
|
|
add r3, r1, #16 ; r3 dest + 16 for second loop
|
|
ldrsh r0, [r0]
|
|
|
|
; generate cospi_16_64 = 11585
|
|
mov r12, #0x2d00
|
|
add r12, #0x41
|
|
|
|
; out = dct_const_round_shift(input[0] * cospi_16_64)
|
|
mul r0, r0, r12 ; input[0] * cospi_16_64
|
|
add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1))
|
|
asr r0, r0, #14 ; >> DCT_CONST_BITS
|
|
|
|
; out = dct_const_round_shift(out * cospi_16_64)
|
|
mul r0, r0, r12 ; out * cospi_16_64
|
|
mov r12, r1 ; save dest
|
|
add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1))
|
|
asr r0, r0, #14 ; >> DCT_CONST_BITS
|
|
|
|
; a1 = ROUND_POWER_OF_TWO(out, 6)
|
|
add r0, r0, #32 ; + (1 <<((6) - 1))
|
|
asrs r0, r0, #6 ; >> 6
|
|
bge diff_positive_32_32
|
|
|
|
diff_negative_32_32
|
|
neg r0, r0
|
|
usat r0, #8, r0
|
|
vdup.u8 q0, r0
|
|
mov r0, #4
|
|
|
|
diff_negative_32_32_loop
|
|
sub r0, #1
|
|
LD_16x8 r1, r2
|
|
SUB_DIFF_16x8 q0
|
|
ST_16x8 r12, r2
|
|
|
|
LD_16x8 r1, r2
|
|
SUB_DIFF_16x8 q0
|
|
ST_16x8 r12, r2
|
|
cmp r0, #2
|
|
moveq r1, r3
|
|
moveq r12, r3
|
|
cmp r0, #0
|
|
bne diff_negative_32_32_loop
|
|
pop {pc}
|
|
|
|
diff_positive_32_32
|
|
usat r0, #8, r0
|
|
vdup.u8 q0, r0
|
|
mov r0, #4
|
|
|
|
diff_positive_32_32_loop
|
|
sub r0, #1
|
|
LD_16x8 r1, r2
|
|
ADD_DIFF_16x8 q0
|
|
ST_16x8 r12, r2
|
|
|
|
LD_16x8 r1, r2
|
|
ADD_DIFF_16x8 q0
|
|
ST_16x8 r12, r2
|
|
cmp r0, #2
|
|
moveq r1, r3
|
|
moveq r12, r3
|
|
cmp r0, #0
|
|
bne diff_positive_32_32_loop
|
|
pop {pc}
|
|
|
|
ENDP ; |aom_idct32x32_1_add_neon|
|
|
END
|