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ac3enc: NEON optimised sum_square_butterfly_float

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This commit is contained in:
Mans Rullgard 2011-03-29 03:09:00 +01:00
parent a4928cf380
commit 4a28e26ea4
2 changed files with 25 additions and 0 deletions
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5
libavcodec/arm/ac3dsp_init_arm.c
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@ -33,6 +33,10 @@ void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4],
const int32_t *coef0,
const int32_t *coef1,
int len);
void ff_ac3_sum_square_butterfly_float_neon(float sum[4],
const float *coef0,
const float *coef1,
int len);
void ff_ac3_bit_alloc_calc_bap_armv6(int16_t *mask, int16_t *psd,
int start, int end,
@ -57,5 +61,6 @@ av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c, int bit_exact)
c->float_to_fixed24 = ff_float_to_fixed24_neon;
c->extract_exponents = ff_ac3_extract_exponents_neon;
c->sum_square_butterfly_int32 = ff_ac3_sum_square_butterfly_int32_neon;
c->sum_square_butterfly_float = ff_ac3_sum_square_butterfly_float_neon;
}
}

20
libavcodec/arm/ac3dsp_neon.S
View File

@ -132,3 +132,23 @@ function ff_ac3_sum_square_butterfly_int32_neon, export=1
vst1.64 {q0-q1}, [r0]
bx lr
endfunc
function ff_ac3_sum_square_butterfly_float_neon, export=1
vmov.f32 q0, #0.0
vmov.f32 q1, #0.0
1:
vld1.32 {d16}, [r1]!
vld1.32 {d17}, [r2]!
vadd.f32 d18, d16, d17
vsub.f32 d19, d16, d17
vmla.f32 d0, d16, d16
vmla.f32 d1, d17, d17
vmla.f32 d2, d18, d18
vmla.f32 d3, d19, d19
subs r3, r3, #2
bgt 1b
vpadd.f32 d0, d0, d1
vpadd.f32 d1, d2, d3
vst1.32 {q0}, [r0]
bx lr
endfunc