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a bit more SSE optimizations 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3513 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2001-12-16 03:06:41 +00:00
parent 0687f3227c
commit 0a8ad047cd
1 changed files with 66 additions and 7 deletions
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71
liba52/imdct.c
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@ -75,6 +75,7 @@ static uint8_t bit_reverse_256[] = {
#ifdef HAVE_SSE
// NOTE: SSE needs 16byte alignment or it will segfault
static complex_t __attribute__((aligned(16))) buf[128];
static float __attribute__((aligned(16))) ps111_1[4]={1,1,1,-1};
#else
static complex_t buf[128];
#endif
@ -221,13 +222,71 @@ imdct_do_512(sample_t data[],sample_t delay[], sample_t bias)
: "%esi"
);
for (m=1; m < 7; m++) {
if(m)
two_m = (1 << m);
else
two_m = 1;
// Note w[1]={{1,0}, {0,-1}}
// C Code for the following asm loop
/* for(i = 0; i < 128; i += 4) {
p = 0 + i;
q = p + 2;
tmp_a_r = buf[p].real;
tmp_a_i = buf[p].imag;
tmp_b_r = buf[q].real;
tmp_b_i = buf[q].imag;
buf[p].real = tmp_a_r + tmp_b_r;
buf[p].imag = tmp_a_i + tmp_b_i;
buf[q].real = tmp_a_r - tmp_b_r;
buf[q].imag = tmp_a_i - tmp_b_i;
tmp_a_r = buf[p+1].real;
tmp_a_i = buf[p+1].imag;
tmp_b_r = buf[q+1].imag;
tmp_b_i = buf[q+1].real;
buf[p+1].real = tmp_a_r + tmp_b_r;
buf[p+1].imag = tmp_a_i - tmp_b_i;
buf[q+1].real = tmp_a_r - tmp_b_r;
buf[q+1].imag = tmp_a_i + tmp_b_i;
}
*/
asm volatile(
"movaps ps111_1, %%xmm7 \n\t" // 1,1,1,-1
"movl %0, %%esi \n\t"
"1: \n\t"
"movaps 16(%%esi), %%xmm2 \n\t" //r2,i2,r3,i3
"shufps $0xB4, %%xmm2, %%xmm2 \n\t" //r2,i2,i3,r3
"mulps %%xmm7, %%xmm2 \n\t" //r2,i2,i3,-r3
"movaps (%%esi), %%xmm0 \n\t" //r0,i0,r1,i1
"movaps (%%esi), %%xmm1 \n\t" //r0,i0,r1,i1
"addps %%xmm2, %%xmm0 \n\t"
"subps %%xmm2, %%xmm1 \n\t"
"movaps %%xmm0, (%%esi) \n\t"
"movaps %%xmm1, 16(%%esi) \n\t"
"addl $32, %%esi \n\t"
"cmpl %1, %%esi \n\t"
" jb 1b \n\t"
:: "g" (buf), "r" (buf + 128)
: "%esi"
);
two_m_plus_one = (1 << (m+1));
m=2;
two_m = 4;
for(k = 0; k < two_m; k++) {
for(i = 0; i < 128; i += 8) {
p = k + i;
q = p + two_m;
tmp_a_r = buf[p].real;
tmp_a_i = buf[p].imag;
tmp_b_r = buf[q].real * w[m][k].real - buf[q].imag * w[m][k].imag;
tmp_b_i = buf[q].imag * w[m][k].real + buf[q].real * w[m][k].imag;
buf[p].real = tmp_a_r + tmp_b_r;
buf[p].imag = tmp_a_i + tmp_b_i;
buf[q].real = tmp_a_r - tmp_b_r;
buf[q].imag = tmp_a_i - tmp_b_i;
}
}
for (m=3; m < 7; m++) {
two_m = (1 << m);
two_m_plus_one = two_m<<1;
for(k = 0; k < two_m; k++) {
for(i = 0; i < 128; i += two_m_plus_one) {