From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
This makes use 128 bit XMM registers whenever possible.
$ time src/sbcenc_mmx -s 4 sin_4m.au > /dev/null
real 0m1.073s
user 0m1.039s
sys 0m0.030s
=== After ====
$ time src/sbcenc -s 4 sin_4m.au > /dev/null
real 0m1.049s
user 0m1.000s
sys 0m0.047s
---
sbc/sbc_primitives_sse.c | 58 +++++++++++++++++-----------------------
1 file changed, 25 insertions(+), 33 deletions(-)
diff --git a/sbc/sbc_primitives_sse.c b/sbc/sbc_primitives_sse.c
index 42cdb03..2a903e1 100644
--- a/sbc/sbc_primitives_sse.c
+++ b/sbc/sbc_primitives_sse.c
@@ -38,48 +38,40 @@
static inline void sbc_analyze_four_sse(const int16_t *in, int32_t *out,
const FIXED_T *consts)
{
- static const SBC_ALIGNED int32_t round_c[2] = {
+ static const SBC_ALIGNED int32_t round_c[4] = {
+ 1 << (SBC_PROTO_FIXED4_SCALE - 1),
+ 1 << (SBC_PROTO_FIXED4_SCALE - 1),
1 << (SBC_PROTO_FIXED4_SCALE - 1),
1 << (SBC_PROTO_FIXED4_SCALE - 1),
};
__asm__ volatile (
- "movq (%0), %%mm0\n"
- "movq 8(%0), %%mm1\n"
- "pmaddwd (%1), %%mm0\n"
- "pmaddwd 8(%1), %%mm1\n"
- "paddd (%2), %%mm0\n"
- "paddd (%2), %%mm1\n"
+ "movdqu (%0), %%xmm0\n"
+ "pmaddwd (%1), %%xmm0\n"
+ "paddd (%2), %%xmm0\n"
"\n"
- "movq 16(%0), %%mm2\n"
- "movq 24(%0), %%mm3\n"
- "pmaddwd 16(%1), %%mm2\n"
- "pmaddwd 24(%1), %%mm3\n"
- "paddd %%mm2, %%mm0\n"
- "paddd %%mm3, %%mm1\n"
+ "movdqu 16(%0), %%xmm1\n"
+ "pmaddwd 16(%1), %%xmm1\n"
+ "paddd %%xmm1, %%xmm0\n"
"\n"
- "movq 32(%0), %%mm2\n"
- "movq 40(%0), %%mm3\n"
- "pmaddwd 32(%1), %%mm2\n"
- "pmaddwd 40(%1), %%mm3\n"
- "paddd %%mm2, %%mm0\n"
- "paddd %%mm3, %%mm1\n"
+ "movdqu 32(%0), %%xmm1\n"
+ "pmaddwd 32(%1), %%xmm1\n"
+ "paddd %%xmm1, %%xmm0\n"
"\n"
- "movq 48(%0), %%mm2\n"
- "movq 56(%0), %%mm3\n"
- "pmaddwd 48(%1), %%mm2\n"
- "pmaddwd 56(%1), %%mm3\n"
- "paddd %%mm2, %%mm0\n"
- "paddd %%mm3, %%mm1\n"
+ "movdqu 48(%0), %%xmm1\n"
+ "pmaddwd 48(%1), %%xmm1\n"
+ "paddd %%xmm1, %%xmm0\n"
"\n"
- "movq 64(%0), %%mm2\n"
- "movq 72(%0), %%mm3\n"
- "pmaddwd 64(%1), %%mm2\n"
- "pmaddwd 72(%1), %%mm3\n"
- "paddd %%mm2, %%mm0\n"
- "paddd %%mm3, %%mm1\n"
+ "movdqu 64(%0), %%xmm1\n"
+ "pmaddwd 64(%1), %%xmm1\n"
+ "paddd %%xmm1, %%xmm0\n"
+ "\n"
+ "psrad %4, %%xmm0\n"
+ "\n"
+ "movdqa %%xmm0, %%xmm1\n"
+ "punpckhqdq %%xmm1, %%xmm1\n"
+ "movdq2q %%xmm0, %%mm0\n"
+ "movdq2q %%xmm1, %%mm1\n"
"\n"
- "psrad %4, %%mm0\n"
- "psrad %4, %%mm1\n"
"packssdw %%mm0, %%mm0\n"
"packssdw %%mm1, %%mm1\n"
"\n"
--
2.26.2
