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Code Issues Releases Activity

avcodec/ac3: Implement sum_square_butterfly_int32 for aarch64 NEON

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Signed-off-by: Geoff Hill <geoff@geoffhill.org>
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Geoff Hill 2024-04-06 07:26:06 -07:00 committed by Martin Storsjö
parent 69cb34f885
commit 42e88f18f3
3 changed files with 55 additions and 0 deletions
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5
libavcodec/aarch64/ac3dsp_init_aarch64.c
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@ -28,6 +28,10 @@
void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs);
void ff_float_to_fixed24_neon(int32_t *dst, const float *src, size_t len);
void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4],
const int32_t *coef0,
const int32_t *coef1,
int len);
av_cold void ff_ac3dsp_init_aarch64(AC3DSPContext *c)
{
@ -37,4 +41,5 @@ av_cold void ff_ac3dsp_init_aarch64(AC3DSPContext *c)
c->ac3_exponent_min = ff_ac3_exponent_min_neon;
c->extract_exponents = ff_ac3_extract_exponents_neon;
c->float_to_fixed24 = ff_float_to_fixed24_neon;
c->sum_square_butterfly_int32 = ff_ac3_sum_square_butterfly_int32_neon;
}

23
libavcodec/aarch64/ac3dsp_neon.S
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@ -64,3 +64,26 @@ function ff_float_to_fixed24_neon, export=1
b.ne 1b
ret
endfunc
function ff_ac3_sum_square_butterfly_int32_neon, export=1
movi v0.2d, #0
movi v1.2d, #0
movi v2.2d, #0
movi v3.2d, #0
1: ld1 {v4.2s}, [x1], #8
ld1 {v5.2s}, [x2], #8
add v6.2s, v4.2s, v5.2s
sub v7.2s, v4.2s, v5.2s
smlal v0.2d, v4.2s, v4.2s
smlal v1.2d, v5.2s, v5.2s
smlal v2.2d, v6.2s, v6.2s
smlal v3.2d, v7.2s, v7.2s
subs w3, w3, #2
b.gt 1b
addp d0, v0.2d
addp d1, v1.2d
addp d2, v2.2d
addp d3, v3.2d
st1 {v0.1d-v3.1d}, [x0]
ret
endfunc

27
tests/checkasm/ac3dsp.c
View File

@ -139,6 +139,32 @@ static void check_float_to_fixed24(AC3DSPContext *c) {
report("float_to_fixed24");
}
static void check_ac3_sum_square_butterfly_int32(AC3DSPContext *c) {
#define ELEMS 240
LOCAL_ALIGNED_16(int32_t, lt, [ELEMS]);
LOCAL_ALIGNED_16(int32_t, rt, [ELEMS]);
LOCAL_ALIGNED_16(uint64_t, v1, [4]);
LOCAL_ALIGNED_16(uint64_t, v2, [4]);
declare_func(void, int64_t[4], const int32_t *, const int32_t *, int);
randomize_i24(lt, ELEMS);
randomize_i24(rt, ELEMS);
if (check_func(c->sum_square_butterfly_int32,
"ac3_sum_square_bufferfly_int32")) {
call_ref(v1, lt, rt, ELEMS);
call_new(v2, lt, rt, ELEMS);
if (memcmp(v1, v2, sizeof(int64_t[4])) != 0)
fail();
bench_new(v2, lt, rt, ELEMS);
}
report("ac3_sum_square_butterfly_int32");
}
void checkasm_check_ac3dsp(void)
{
AC3DSPContext c;
@ -147,4 +173,5 @@ void checkasm_check_ac3dsp(void)
check_ac3_exponent_min(&c);
check_ac3_extract_exponents(&c);
check_float_to_fixed24(&c);
check_ac3_sum_square_butterfly_int32(&c);
}