mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-09-19 21:06:42 +00:00
avcodec/vc1: Arm 64-bit NEON unescape fast path
checkasm benchmarks on 1.5 GHz Cortex-A72 are as follows. vc1dsp.vc1_unescape_buffer_c: 655617.7 vc1dsp.vc1_unescape_buffer_neon: 118237.0 Signed-off-by: Ben Avison <bavison@riscosopen.org> Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Ben Avison
Martin Storsjö
parent
5379412ed0
commit
6eee650289
@ -21,6 +21,7 @@
|
||||
#include "libavutil/attributes.h"
|
||||
#include "libavutil/cpu.h"
|
||||
#include "libavutil/aarch64/cpu.h"
|
||||
#include "libavutil/intreadwrite.h"
|
||||
#include "libavcodec/vc1dsp.h"
|
||||
|
||||
#include "config.h"
|
||||
@ -51,6 +52,64 @@ void ff_put_vc1_chroma_mc4_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
|
||||
void ff_avg_vc1_chroma_mc4_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
|
||||
int h, int x, int y);
|
||||
|
||||
int ff_vc1_unescape_buffer_helper_neon(const uint8_t *src, int size, uint8_t *dst);
|
||||
|
||||
static int vc1_unescape_buffer_neon(const uint8_t *src, int size, uint8_t *dst)
|
||||
{
|
||||
/* Dealing with starting and stopping, and removing escape bytes, are
|
||||
* comparatively less time-sensitive, so are more clearly expressed using
|
||||
* a C wrapper around the assembly inner loop. Note that we assume a
|
||||
* little-endian machine that supports unaligned loads. */
|
||||
int dsize = 0;
|
||||
while (size >= 4)
|
||||
{
|
||||
int found = 0;
|
||||
while (!found && (((uintptr_t) dst) & 7) && size >= 4)
|
||||
{
|
||||
found = (AV_RL32(src) &~ 0x03000000) == 0x00030000;
|
||||
if (!found)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
--size;
|
||||
++dsize;
|
||||
}
|
||||
}
|
||||
if (!found)
|
||||
{
|
||||
int skip = size - ff_vc1_unescape_buffer_helper_neon(src, size, dst);
|
||||
dst += skip;
|
||||
src += skip;
|
||||
size -= skip;
|
||||
dsize += skip;
|
||||
while (!found && size >= 4)
|
||||
{
|
||||
found = (AV_RL32(src) &~ 0x03000000) == 0x00030000;
|
||||
if (!found)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
--size;
|
||||
++dsize;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (found)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
*dst++ = *src++;
|
||||
++src;
|
||||
size -= 3;
|
||||
dsize += 2;
|
||||
}
|
||||
}
|
||||
while (size > 0)
|
||||
{
|
||||
*dst++ = *src++;
|
||||
--size;
|
||||
++dsize;
|
||||
}
|
||||
return dsize;
|
||||
}
|
||||
|
||||
av_cold void ff_vc1dsp_init_aarch64(VC1DSPContext *dsp)
|
||||
{
|
||||
int cpu_flags = av_get_cpu_flags();
|
||||
@ -76,5 +135,7 @@ av_cold void ff_vc1dsp_init_aarch64(VC1DSPContext *dsp)
|
||||
dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = ff_avg_vc1_chroma_mc8_neon;
|
||||
dsp->put_no_rnd_vc1_chroma_pixels_tab[1] = ff_put_vc1_chroma_mc4_neon;
|
||||
dsp->avg_no_rnd_vc1_chroma_pixels_tab[1] = ff_avg_vc1_chroma_mc4_neon;
|
||||
|
||||
dsp->vc1_unescape_buffer = vc1_unescape_buffer_neon;
|
||||
}
|
||||
}
|
||||
|
||||
@ -1368,3 +1368,179 @@ function ff_vc1_h_loop_filter16_neon, export=1
|
||||
st2 {v2.b, v3.b}[7], [x6]
|
||||
4: ret
|
||||
endfunc
|
||||
|
||||
// Copy at most the specified number of bytes from source to destination buffer,
|
||||
// stopping at a multiple of 32 bytes, none of which are the start of an escape sequence
|
||||
// On entry:
|
||||
// x0 -> source buffer
|
||||
// w1 = max number of bytes to copy
|
||||
// x2 -> destination buffer, optimally 8-byte aligned
|
||||
// On exit:
|
||||
// w0 = number of bytes not copied
|
||||
function ff_vc1_unescape_buffer_helper_neon, export=1
|
||||
// Offset by 80 to screen out cases that are too short for us to handle,
|
||||
// and also make it easy to test for loop termination, or to determine
|
||||
// whether we need an odd number of half-iterations of the loop.
|
||||
subs w1, w1, #80
|
||||
b.mi 90f
|
||||
|
||||
// Set up useful constants
|
||||
movi v20.4s, #3, lsl #24
|
||||
movi v21.4s, #3, lsl #16
|
||||
|
||||
tst w1, #32
|
||||
b.ne 1f
|
||||
|
||||
ld1 {v0.16b, v1.16b, v2.16b}, [x0], #48
|
||||
ext v25.16b, v0.16b, v1.16b, #1
|
||||
ext v26.16b, v0.16b, v1.16b, #2
|
||||
ext v27.16b, v0.16b, v1.16b, #3
|
||||
ext v29.16b, v1.16b, v2.16b, #1
|
||||
ext v30.16b, v1.16b, v2.16b, #2
|
||||
ext v31.16b, v1.16b, v2.16b, #3
|
||||
bic v24.16b, v0.16b, v20.16b
|
||||
bic v25.16b, v25.16b, v20.16b
|
||||
bic v26.16b, v26.16b, v20.16b
|
||||
bic v27.16b, v27.16b, v20.16b
|
||||
bic v28.16b, v1.16b, v20.16b
|
||||
bic v29.16b, v29.16b, v20.16b
|
||||
bic v30.16b, v30.16b, v20.16b
|
||||
bic v31.16b, v31.16b, v20.16b
|
||||
eor v24.16b, v24.16b, v21.16b
|
||||
eor v25.16b, v25.16b, v21.16b
|
||||
eor v26.16b, v26.16b, v21.16b
|
||||
eor v27.16b, v27.16b, v21.16b
|
||||
eor v28.16b, v28.16b, v21.16b
|
||||
eor v29.16b, v29.16b, v21.16b
|
||||
eor v30.16b, v30.16b, v21.16b
|
||||
eor v31.16b, v31.16b, v21.16b
|
||||
cmeq v24.4s, v24.4s, #0
|
||||
cmeq v25.4s, v25.4s, #0
|
||||
cmeq v26.4s, v26.4s, #0
|
||||
cmeq v27.4s, v27.4s, #0
|
||||
add w1, w1, #32
|
||||
b 3f
|
||||
|
||||
1: ld1 {v3.16b, v4.16b, v5.16b}, [x0], #48
|
||||
ext v25.16b, v3.16b, v4.16b, #1
|
||||
ext v26.16b, v3.16b, v4.16b, #2
|
||||
ext v27.16b, v3.16b, v4.16b, #3
|
||||
ext v29.16b, v4.16b, v5.16b, #1
|
||||
ext v30.16b, v4.16b, v5.16b, #2
|
||||
ext v31.16b, v4.16b, v5.16b, #3
|
||||
bic v24.16b, v3.16b, v20.16b
|
||||
bic v25.16b, v25.16b, v20.16b
|
||||
bic v26.16b, v26.16b, v20.16b
|
||||
bic v27.16b, v27.16b, v20.16b
|
||||
bic v28.16b, v4.16b, v20.16b
|
||||
bic v29.16b, v29.16b, v20.16b
|
||||
bic v30.16b, v30.16b, v20.16b
|
||||
bic v31.16b, v31.16b, v20.16b
|
||||
eor v24.16b, v24.16b, v21.16b
|
||||
eor v25.16b, v25.16b, v21.16b
|
||||
eor v26.16b, v26.16b, v21.16b
|
||||
eor v27.16b, v27.16b, v21.16b
|
||||
eor v28.16b, v28.16b, v21.16b
|
||||
eor v29.16b, v29.16b, v21.16b
|
||||
eor v30.16b, v30.16b, v21.16b
|
||||
eor v31.16b, v31.16b, v21.16b
|
||||
cmeq v24.4s, v24.4s, #0
|
||||
cmeq v25.4s, v25.4s, #0
|
||||
cmeq v26.4s, v26.4s, #0
|
||||
cmeq v27.4s, v27.4s, #0
|
||||
// Drop through...
|
||||
2: mov v0.16b, v5.16b
|
||||
ld1 {v1.16b, v2.16b}, [x0], #32
|
||||
cmeq v28.4s, v28.4s, #0
|
||||
cmeq v29.4s, v29.4s, #0
|
||||
cmeq v30.4s, v30.4s, #0
|
||||
cmeq v31.4s, v31.4s, #0
|
||||
orr v24.16b, v24.16b, v25.16b
|
||||
orr v26.16b, v26.16b, v27.16b
|
||||
orr v28.16b, v28.16b, v29.16b
|
||||
orr v30.16b, v30.16b, v31.16b
|
||||
ext v25.16b, v0.16b, v1.16b, #1
|
||||
orr v22.16b, v24.16b, v26.16b
|
||||
ext v26.16b, v0.16b, v1.16b, #2
|
||||
ext v27.16b, v0.16b, v1.16b, #3
|
||||
ext v29.16b, v1.16b, v2.16b, #1
|
||||
orr v23.16b, v28.16b, v30.16b
|
||||
ext v30.16b, v1.16b, v2.16b, #2
|
||||
ext v31.16b, v1.16b, v2.16b, #3
|
||||
bic v24.16b, v0.16b, v20.16b
|
||||
bic v25.16b, v25.16b, v20.16b
|
||||
bic v26.16b, v26.16b, v20.16b
|
||||
orr v22.16b, v22.16b, v23.16b
|
||||
bic v27.16b, v27.16b, v20.16b
|
||||
bic v28.16b, v1.16b, v20.16b
|
||||
bic v29.16b, v29.16b, v20.16b
|
||||
bic v30.16b, v30.16b, v20.16b
|
||||
bic v31.16b, v31.16b, v20.16b
|
||||
addv s22, v22.4s
|
||||
eor v24.16b, v24.16b, v21.16b
|
||||
eor v25.16b, v25.16b, v21.16b
|
||||
eor v26.16b, v26.16b, v21.16b
|
||||
eor v27.16b, v27.16b, v21.16b
|
||||
eor v28.16b, v28.16b, v21.16b
|
||||
mov w3, v22.s[0]
|
||||
eor v29.16b, v29.16b, v21.16b
|
||||
eor v30.16b, v30.16b, v21.16b
|
||||
eor v31.16b, v31.16b, v21.16b
|
||||
cmeq v24.4s, v24.4s, #0
|
||||
cmeq v25.4s, v25.4s, #0
|
||||
cmeq v26.4s, v26.4s, #0
|
||||
cmeq v27.4s, v27.4s, #0
|
||||
cbnz w3, 90f
|
||||
st1 {v3.16b, v4.16b}, [x2], #32
|
||||
3: mov v3.16b, v2.16b
|
||||
ld1 {v4.16b, v5.16b}, [x0], #32
|
||||
cmeq v28.4s, v28.4s, #0
|
||||
cmeq v29.4s, v29.4s, #0
|
||||
cmeq v30.4s, v30.4s, #0
|
||||
cmeq v31.4s, v31.4s, #0
|
||||
orr v24.16b, v24.16b, v25.16b
|
||||
orr v26.16b, v26.16b, v27.16b
|
||||
orr v28.16b, v28.16b, v29.16b
|
||||
orr v30.16b, v30.16b, v31.16b
|
||||
ext v25.16b, v3.16b, v4.16b, #1
|
||||
orr v22.16b, v24.16b, v26.16b
|
||||
ext v26.16b, v3.16b, v4.16b, #2
|
||||
ext v27.16b, v3.16b, v4.16b, #3
|
||||
ext v29.16b, v4.16b, v5.16b, #1
|
||||
orr v23.16b, v28.16b, v30.16b
|
||||
ext v30.16b, v4.16b, v5.16b, #2
|
||||
ext v31.16b, v4.16b, v5.16b, #3
|
||||
bic v24.16b, v3.16b, v20.16b
|
||||
bic v25.16b, v25.16b, v20.16b
|
||||
bic v26.16b, v26.16b, v20.16b
|
||||
orr v22.16b, v22.16b, v23.16b
|
||||
bic v27.16b, v27.16b, v20.16b
|
||||
bic v28.16b, v4.16b, v20.16b
|
||||
bic v29.16b, v29.16b, v20.16b
|
||||
bic v30.16b, v30.16b, v20.16b
|
||||
bic v31.16b, v31.16b, v20.16b
|
||||
addv s22, v22.4s
|
||||
eor v24.16b, v24.16b, v21.16b
|
||||
eor v25.16b, v25.16b, v21.16b
|
||||
eor v26.16b, v26.16b, v21.16b
|
||||
eor v27.16b, v27.16b, v21.16b
|
||||
eor v28.16b, v28.16b, v21.16b
|
||||
mov w3, v22.s[0]
|
||||
eor v29.16b, v29.16b, v21.16b
|
||||
eor v30.16b, v30.16b, v21.16b
|
||||
eor v31.16b, v31.16b, v21.16b
|
||||
cmeq v24.4s, v24.4s, #0
|
||||
cmeq v25.4s, v25.4s, #0
|
||||
cmeq v26.4s, v26.4s, #0
|
||||
cmeq v27.4s, v27.4s, #0
|
||||
cbnz w3, 91f
|
||||
st1 {v0.16b, v1.16b}, [x2], #32
|
||||
subs w1, w1, #64
|
||||
b.pl 2b
|
||||
|
||||
90: add w0, w1, #80
|
||||
ret
|
||||
|
||||
91: sub w1, w1, #32
|
||||
b 90b
|
||||
endfunc
|
||||
|
||||
Loading…
Reference in New Issue
Block a user