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libFLAC/lpc_intrin_sse.c : New SSE code to calculate autocorrelation.

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Accelerate FLAC__lpc_compute_autocorrelation_intrin_sse_lag_NN routines for
AMD and newer Intel CPUs (means Core i aka Nehalem and newer). Unfortunately
it's slower on older Intel CPUs.

According to tests at HA:

    <http://www.hydrogenaud.io/forums/index.php?s=&showtopic=101082&view=findpost&p=870753>

  CPU                 flac -5           flac -8

  Athlon XP           +5 %              +2.4 %
  Athlon 64 X2        +9 %              +4 %
  Core i              +7 %              +1 % ... +2.7 %
  Core 2              ?                 -3.5 %

According to Steam HW survey <http://store.steampowered.com/hwsurvey/>
69% of Steam users have SSE4.2 which means that the new code is faster for
them. There are also AMD users that don't have SSE4.2, so 75% of Steam users
should benefit from this patch.

Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo
2014-08-09 12:32:57 +10:00
parent 0ae3e4689d
commit e9d805dd43
1 changed files with 199 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

199
src/libFLAC/lpc_intrin_sse.c
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@@ -45,6 +45,204 @@
#include <xmmintrin.h> /* SSE */
#if 1
/* Faster on current Intel (starting from Core i aka Nehalem) and all AMD CPUs */
FLAC__SSE_TARGET("sse")
void FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
{
int i;
int limit = data_len - 4;
__m128 sum0;
(void) lag;
FLAC__ASSERT(lag <= 4);
FLAC__ASSERT(lag <= data_len);
sum0 = _mm_setzero_ps();
for(i = 0; i <= limit; i++) {
__m128 d, d0;
d0 = _mm_loadu_ps(data+i);
d = d0; d = _mm_shuffle_ps(d, d, 0);
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d0, d));
}
{
__m128 d0 = _mm_setzero_ps();
limit++; if(limit < 0) limit = 0;
for(i = data_len-1; i >= limit; i--) {
__m128 d;
d = _mm_load_ss(data+i); d = _mm_shuffle_ps(d, d, 0);
d0 = _mm_shuffle_ps(d0, d0, _MM_SHUFFLE(2,1,0,3));
d0 = _mm_move_ss(d0, d);
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d, d0));
}
}
_mm_storeu_ps(autoc, sum0);
}
FLAC__SSE_TARGET("sse")
void FLAC__lpc_compute_autocorrelation_intrin_sse_lag_8(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
{
int i;
int limit = data_len - 8;
__m128 sum0, sum1;
(void) lag;
FLAC__ASSERT(lag <= 8);
FLAC__ASSERT(lag <= data_len);
sum0 = _mm_setzero_ps();
sum1 = _mm_setzero_ps();
for(i = 0; i <= limit; i++) {
__m128 d, d0, d1;
d0 = _mm_loadu_ps(data+i);
d1 = _mm_loadu_ps(data+i+4);
d = d0; d = _mm_shuffle_ps(d, d, 0);
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d0, d));
sum1 = _mm_add_ps(sum1, _mm_mul_ps(d1, d));
}
{
__m128 d0 = _mm_setzero_ps();
__m128 d1 = _mm_setzero_ps();
limit++; if(limit < 0) limit = 0;
for(i = data_len-1; i >= limit; i--) {
__m128 d;
d = _mm_load_ss(data+i); d = _mm_shuffle_ps(d, d, 0);
d1 = _mm_shuffle_ps(d1, d1, _MM_SHUFFLE(2,1,0,3));
d0 = _mm_shuffle_ps(d0, d0, _MM_SHUFFLE(2,1,0,3));
d1 = _mm_move_ss(d1, d0);
d0 = _mm_move_ss(d0, d);
sum1 = _mm_add_ps(sum1, _mm_mul_ps(d, d1));
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d, d0));
}
}
_mm_storeu_ps(autoc, sum0);
_mm_storeu_ps(autoc+4, sum1);
}
FLAC__SSE_TARGET("sse")
void FLAC__lpc_compute_autocorrelation_intrin_sse_lag_12(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
{
int i;
int limit = data_len - 12;
__m128 sum0, sum1, sum2;
(void) lag;
FLAC__ASSERT(lag <= 12);
FLAC__ASSERT(lag <= data_len);
sum0 = _mm_setzero_ps();
sum1 = _mm_setzero_ps();
sum2 = _mm_setzero_ps();
for(i = 0; i <= limit; i++) {
__m128 d, d0, d1, d2;
d0 = _mm_loadu_ps(data+i);
d1 = _mm_loadu_ps(data+i+4);
d2 = _mm_loadu_ps(data+i+8);
d = d0; d = _mm_shuffle_ps(d, d, 0);
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d0, d));
sum1 = _mm_add_ps(sum1, _mm_mul_ps(d1, d));
sum2 = _mm_add_ps(sum2, _mm_mul_ps(d2, d));
}
{
__m128 d0 = _mm_setzero_ps();
__m128 d1 = _mm_setzero_ps();
__m128 d2 = _mm_setzero_ps();
limit++; if(limit < 0) limit = 0;
for(i = data_len-1; i >= limit; i--) {
__m128 d;
d = _mm_load_ss(data+i); d = _mm_shuffle_ps(d, d, 0);
d2 = _mm_shuffle_ps(d2, d2, _MM_SHUFFLE(2,1,0,3));
d1 = _mm_shuffle_ps(d1, d1, _MM_SHUFFLE(2,1,0,3));
d0 = _mm_shuffle_ps(d0, d0, _MM_SHUFFLE(2,1,0,3));
d2 = _mm_move_ss(d2, d1);
d1 = _mm_move_ss(d1, d0);
d0 = _mm_move_ss(d0, d);
sum2 = _mm_add_ps(sum2, _mm_mul_ps(d, d2));
sum1 = _mm_add_ps(sum1, _mm_mul_ps(d, d1));
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d, d0));
}
}
_mm_storeu_ps(autoc, sum0);
_mm_storeu_ps(autoc+4, sum1);
_mm_storeu_ps(autoc+8, sum2);
}
FLAC__SSE_TARGET("sse")
void FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
{
int i;
int limit = data_len - 16;
__m128 sum0, sum1, sum2, sum3;
(void) lag;
FLAC__ASSERT(lag <= 16);
FLAC__ASSERT(lag <= data_len);
sum0 = _mm_setzero_ps();
sum1 = _mm_setzero_ps();
sum2 = _mm_setzero_ps();
sum3 = _mm_setzero_ps();
for(i = 0; i <= limit; i++) {
__m128 d, d0, d1, d2, d3;
d0 = _mm_loadu_ps(data+i);
d1 = _mm_loadu_ps(data+i+4);
d2 = _mm_loadu_ps(data+i+8);
d3 = _mm_loadu_ps(data+i+12);
d = d0; d = _mm_shuffle_ps(d, d, 0);
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d0, d));
sum1 = _mm_add_ps(sum1, _mm_mul_ps(d1, d));
sum2 = _mm_add_ps(sum2, _mm_mul_ps(d2, d));
sum3 = _mm_add_ps(sum3, _mm_mul_ps(d3, d));
}
{
__m128 d0 = _mm_setzero_ps();
__m128 d1 = _mm_setzero_ps();
__m128 d2 = _mm_setzero_ps();
__m128 d3 = _mm_setzero_ps();
limit++; if(limit < 0) limit = 0;
for(i = data_len-1; i >= limit; i--) {
__m128 d;
d = _mm_load_ss(data+i); d = _mm_shuffle_ps(d, d, 0);
d3 = _mm_shuffle_ps(d3, d3, _MM_SHUFFLE(2,1,0,3));
d2 = _mm_shuffle_ps(d2, d2, _MM_SHUFFLE(2,1,0,3));
d1 = _mm_shuffle_ps(d1, d1, _MM_SHUFFLE(2,1,0,3));
d0 = _mm_shuffle_ps(d0, d0, _MM_SHUFFLE(2,1,0,3));
d3 = _mm_move_ss(d3, d2);
d2 = _mm_move_ss(d2, d1);
d1 = _mm_move_ss(d1, d0);
d0 = _mm_move_ss(d0, d);
sum3 = _mm_add_ps(sum3, _mm_mul_ps(d, d3));
sum2 = _mm_add_ps(sum2, _mm_mul_ps(d, d2));
sum1 = _mm_add_ps(sum1, _mm_mul_ps(d, d1));
sum0 = _mm_add_ps(sum0, _mm_mul_ps(d, d0));
}
}
_mm_storeu_ps(autoc, sum0);
_mm_storeu_ps(autoc+4, sum1);
_mm_storeu_ps(autoc+8, sum2);
_mm_storeu_ps(autoc+12,sum3);
}
#else
/* Faster on older Intel CPUs (up to Core 2) */
FLAC__SSE_TARGET("sse")
void FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[])
{
@@ -245,6 +443,7 @@ void FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16(const FLAC__real data[]
_mm_storeu_ps(autoc+8, xmm8);
_mm_storeu_ps(autoc+12,xmm9);
}
#endif
#endif /* FLAC__SSE_SUPPORTED */
#endif /* (FLAC__CPU_IA32 || FLAC__CPU_X86_64) && FLAC__HAS_X86INTRIN */