diff options
Diffstat (limited to 'libavresample/x86/audio_convert.asm')
| -rw-r--r-- | libavresample/x86/audio_convert.asm | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libavresample/x86/audio_convert.asm b/libavresample/x86/audio_convert.asm index 6e14892928..8435edefb0 100644 --- a/libavresample/x86/audio_convert.asm +++ b/libavresample/x86/audio_convert.asm @@ -83,6 +83,44 @@ CONV_S16_TO_FLT INIT_XMM sse4 CONV_S16_TO_FLT +;------------------------------------------------------------------------------ +; void ff_conv_s32_to_s16(int16_t *dst, const int32_t *src, int len); +;------------------------------------------------------------------------------ + +%macro CONV_S32_TO_S16 0 +cglobal conv_s32_to_s16, 3,3,4, dst, src, len + lea lenq, [2*lend] + lea srcq, [srcq+2*lenq] + add dstq, lenq + neg lenq +.loop: + mova m0, [srcq+2*lenq ] + mova m1, [srcq+2*lenq+ mmsize] + mova m2, [srcq+2*lenq+2*mmsize] + mova m3, [srcq+2*lenq+3*mmsize] + psrad m0, 16 + psrad m1, 16 + psrad m2, 16 + psrad m3, 16 + packssdw m0, m1 + packssdw m2, m3 + mova [dstq+lenq ], m0 + mova [dstq+lenq+mmsize], m2 + add lenq, mmsize*2 + jl .loop +%if mmsize == 8 + emms + RET +%else + REP_RET +%endif +%endmacro + +INIT_MMX mmx +CONV_S32_TO_S16 +INIT_XMM sse2 +CONV_S32_TO_S16 + ;----------------------------------------------------------------------------- ; void ff_conv_fltp_to_flt_6ch(float *dst, float *const *src, int len, ; int channels); |