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ARM: NEON optimised vector_fmul_reverse 

Originally committed as revision 20029 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-09-26 19:23:25 +00:00
parent 13d41a194e
commit b9b1ad9cd8
2 changed files with 27 additions and 0 deletions
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3
libavcodec/arm/dsputil_neon.c
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@ -171,6 +171,8 @@ void ff_butterflies_float_neon(float *v1, float *v2, int len);
float ff_scalarproduct_float_neon(const float *v1, const float *v2, int len);
void ff_int32_to_float_fmul_scalar_neon(float *dst, const int *src,
float mul, int len);
void ff_vector_fmul_reverse_neon(float *dst, const float *src0,
const float *src1, int len);
void ff_float_to_int16_neon(int16_t *, const float *, long);
void ff_float_to_int16_interleave_neon(int16_t *, const float **, long, int);
@ -287,6 +289,7 @@ void ff_dsputil_init_neon(DSPContext *c, AVCodecContext *avctx)
c->butterflies_float = ff_butterflies_float_neon;
c->scalarproduct_float = ff_scalarproduct_float_neon;
c->int32_to_float_fmul_scalar = ff_int32_to_float_fmul_scalar_neon;
c->vector_fmul_reverse = ff_vector_fmul_reverse_neon;
c->vector_fmul_sv_scalar[0] = ff_vector_fmul_sv_scalar_2_neon;
c->vector_fmul_sv_scalar[1] = ff_vector_fmul_sv_scalar_4_neon;

24
libavcodec/arm/dsputil_neon_s.S
View File

@ -1051,3 +1051,27 @@ NOVFP len .req r3
bx lr
.unreq len
.endfunc
function ff_vector_fmul_reverse_neon, export=1
add r2, r2, r3, lsl #2
sub r2, r2, #32
mov r12, #-32
vld1.32 {q0-q1}, [r1,:128]!
vld1.32 {q2-q3}, [r2,:128], r12
1: pld [r1, #32]
vrev64.32 q3, q3
vmul.f32 d16, d0, d7
vmul.f32 d17, d1, d6
pld [r2, #-32]
vrev64.32 q2, q2
vmul.f32 d18, d2, d5
vmul.f32 d19, d3, d4
subs r3, r3, #8
beq 2f
vld1.32 {q0-q1}, [r1,:128]!
vld1.32 {q2-q3}, [r2,:128], r12
vst1.32 {q8-q9}, [r0,:128]!
b 1b
2: vst1.32 {q8-q9}, [r0,:128]!
bx lr
.endfunc