diff options
| author | Christophe Gisquet <christophe.gisquet@gmail.com> | 2013-04-12 21:07:01 +0200 |
|---|---|---|
| committer | Anton Khirnov <anton@khirnov.net> | 2013-05-03 08:08:02 +0200 |
| commit | 566b7a20fd0cab44d344329538d314454a0bcc2f (patch) | |
| tree | f2ca45002f7479bdaa9e1cb4abc92c794b42e338 /libavutil/x86/float_dsp.asm | |
| parent | b333f3a22a4db4cf65d6a0457ac82ecbe7c7ac44 (diff) | |
x86: float dsp: butterflies_float SSE
97c -> 49c
Some codecs could benefit from more unrolling, but AAC doesn't.
Diffstat (limited to 'libavutil/x86/float_dsp.asm')
| -rw-r--r-- | libavutil/x86/float_dsp.asm | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libavutil/x86/float_dsp.asm b/libavutil/x86/float_dsp.asm index 779339c575..10330ff336 100644 --- a/libavutil/x86/float_dsp.asm +++ b/libavutil/x86/float_dsp.asm @@ -252,3 +252,29 @@ cglobal scalarproduct_float, 3,3,2, v1, v2, offset fld dword r0m %endif RET + +;----------------------------------------------------------------------------- +; void ff_butterflies_float(float *src0, float *src1, int len); +;----------------------------------------------------------------------------- +INIT_XMM sse +cglobal butterflies_float, 3,3,3, src0, src1, len +%if ARCH_X86_64 + movsxd lenq, lend +%endif + test lenq, lenq + jz .end + shl lenq, 2 + lea src0q, [src0q + lenq] + lea src1q, [src1q + lenq] + neg lenq +.loop: + mova m0, [src0q + lenq] + mova m1, [src1q + lenq] + subps m2, m0, m1 + addps m0, m0, m1 + mova [src1q + lenq], m2 + mova [src0q + lenq], m0 + add lenq, mmsize + jl .loop +.end: + REP_RET |