lavr: x86: optimized 2-channel fltp to flt conversion

1 files changed, 37 insertions, 0 deletions

diff --git a/libavresample/x86/audio_convert.asm b/libavresample/x86/audio_convert.asm
index acc6bb0dc1..48508af81c 100644
--- a/libavresample/x86/audio_convert.asm
+++ b/libavresample/x86/audio_convert.asm
@@ -695,6 +695,43 @@ INIT_XMM avx
 CONV_FLTP_TO_S16_6CH
 %endif
 
+;------------------------------------------------------------------------------
+; void ff_conv_fltp_to_flt_2ch(float *dst, float *const *src, int len,
+;                              int channels);
+;------------------------------------------------------------------------------
+
+%macro CONV_FLTP_TO_FLT_2CH 0
+cglobal conv_fltp_to_flt_2ch, 3,4,5, dst, src0, len, src1
+    mov  src1q, [src0q+gprsize]
+    mov  src0q, [src0q]
+    lea   lenq, [4*lend]
+    add  src0q, lenq
+    add  src1q, lenq
+    lea   dstq, [dstq+2*lenq]
+    neg   lenq
+.loop
+    mova    m0, [src0q+lenq       ]
+    mova    m1, [src1q+lenq       ]
+    mova    m2, [src0q+lenq+mmsize]
+    mova    m3, [src1q+lenq+mmsize]
+    SBUTTERFLYPS 0, 1, 4
+    SBUTTERFLYPS 2, 3, 4
+    mova  [dstq+2*lenq+0*mmsize], m0
+    mova  [dstq+2*lenq+1*mmsize], m1
+    mova  [dstq+2*lenq+2*mmsize], m2
+    mova  [dstq+2*lenq+3*mmsize], m3
+    add   lenq, 2*mmsize
+    jl .loop
+    REP_RET
+%endmacro
+
+INIT_XMM sse
+CONV_FLTP_TO_FLT_2CH
+%if HAVE_AVX
+INIT_XMM avx
+CONV_FLTP_TO_FLT_2CH
+%endif
+
 ;-----------------------------------------------------------------------------
 ; void ff_conv_fltp_to_flt_6ch(float *dst, float *const *src, int len,
 ;                              int channels);