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ac3enc: neon optimised sum_square_butterfly_int32

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This commit is contained in:
Mans Rullgard 2011-03-13 02:21:33 +00:00
parent f507a9fe00
commit a4928cf380
2 changed files with 29 additions and 0 deletions
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5
libavcodec/arm/ac3dsp_init_arm.c
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@ -29,6 +29,10 @@ void ff_ac3_lshift_int16_neon(int16_t *src, unsigned len, unsigned shift);
void ff_ac3_rshift_int32_neon(int32_t *src, unsigned len, unsigned shift);
void ff_float_to_fixed24_neon(int32_t *dst, const float *src, unsigned int len);
void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs);
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_bit_alloc_calc_bap_armv6(int16_t *mask, int16_t *psd,
int start, int end,
@ -52,5 +56,6 @@ av_cold void ff_ac3dsp_init_arm(AC3DSPContext *c, int bit_exact)
c->ac3_rshift_int32 = ff_ac3_rshift_int32_neon;
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;
}
}

24
libavcodec/arm/ac3dsp_neon.S
View File

@ -108,3 +108,27 @@ function ff_ac3_extract_exponents_neon, export=1
bgt 1b
bx lr
endfunc
function ff_ac3_sum_square_butterfly_int32_neon, export=1
vmov.i64 q0, #0
vmov.i64 q1, #0
vmov.i64 q2, #0
vmov.i64 q3, #0
1:
vld1.32 {d16}, [r1]!
vld1.32 {d17}, [r2]!
vadd.s32 d18, d16, d17
vsub.s32 d19, d16, d17
vmlal.s32 q0, d16, d16
vmlal.s32 q1, d17, d17
vmlal.s32 q2, d18, d18
vmlal.s32 q3, d19, d19
subs r3, r3, #2
bgt 1b
vadd.s64 d0, d0, d1
vadd.s64 d1, d2, d3
vadd.s64 d2, d4, d5
vadd.s64 d3, d6, d7
vst1.64 {q0-q1}, [r0]
bx lr
endfunc