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volume_mmx: fix mmx code a bit

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This commit is contained in:
Wim Taymans 2009-08-12 20:43:37 +02:00
parent 3a0b012ee0
commit 08f3e16c84
1 changed files with 26 additions and 20 deletions
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46
src/pulsecore/svolume_mmx.c
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@ -104,14 +104,15 @@ pa_volume_s16ne_mmx (int16_t *samples, int32_t *volumes, unsigned channels, unsi
{
int64_t channel, temp;
/* the max number of samples we process at a time */
/* the max number of samples we process at a time, this is also the max amount
* we overread the volume array, which should have enough padding. */
channels = MAX (4, channels);
#define VOLUME_32x16(s,v) /* v1_h | v1_l | v0_h | v0_l */ \
" pxor %%mm4, %%mm4 \n\t" \
" punpcklwd %%mm4, "#s" \n\t" /* 0 | p1 | 0 | p0 */ \
" pcmpgtw "#s", %%mm4 \n\t" /* select sign from sample */ \
" pand "#v", %%mm4 \n\t" /* extract correction factors */ \
" pand "#v", %%mm4 \n\t" /* extract sign correction factors */ \
" movq "#s", %%mm5 \n\t" \
" pmulhuw "#v", "#s" \n\t" /* 0 | p1*v1lh | 0 | p0*v0lh */ \
" psubd %%mm4, "#s" \n\t" /* sign correction */ \
@ -123,8 +124,8 @@ pa_volume_s16ne_mmx (int16_t *samples, int32_t *volumes, unsigned channels, unsi
#define MOD_ADD(a,b) \
" add "#a", %3 \n\t" \
" mov %3, %4 \n\t" \
" sub %5, %4 \n\t" \
" cmp %3, "#b" \n\t" \
" sub "#b", %4 \n\t" \
" cmp "#b", %3 \n\t" \
" cmovae %4, %3 \n\t"
__asm__ __volatile__ (
@ -135,14 +136,13 @@ pa_volume_s16ne_mmx (int16_t *samples, int32_t *volumes, unsigned channels, unsi
" je 2f \n\t"
" movd (%1, %3, 4), %%mm0 \n\t" /* do odd samples */
" movw (%0), %%ax \n\t"
" movd %%eax, %%mm1 \n\t"
" movw (%0), %4 \n\t"
" movd %4, %%mm1 \n\t"
VOLUME_32x16 (%%mm1, %%mm0)
" movd %%mm0, %%eax \n\t"
" movw %%ax, (%0) \n\t"
" movd %%mm0, %4 \n\t"
" movw %4, (%0) \n\t"
" add $2, %0 \n\t"
MOD_ADD ($1, %5)
" dec %2 \n\t"
"2: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 2 samples at a time */
@ -156,7 +156,6 @@ pa_volume_s16ne_mmx (int16_t *samples, int32_t *volumes, unsigned channels, unsi
" movd %%mm0, (%0) \n\t"
" add $4, %0 \n\t"
MOD_ADD ($2, %5)
" dec %2 \n\t"
"4: \n\t"
" sar $1, %2 \n\t" /* prepare for processing 4 samples at a time */
@ -180,9 +179,9 @@ pa_volume_s16ne_mmx (int16_t *samples, int32_t *volumes, unsigned channels, unsi
"6: \n\t"
" emms \n\t"
: "+r" (samples), "+r" (volumes), "+r" (length), "=D" ((int64_t)channel), "=r" (temp)
: "+r" (samples), "+r" (volumes), "+r" (length), "=D" ((int64_t)channel), "=&r" (temp)
: "r" ((int64_t)channels)
: "rax", "cc"
: "cc"
);
}
@ -370,7 +369,7 @@ pa_volume_s24_32re_mmx (uint32_t *samples, int32_t *volumes, unsigned channels,
#undef RUN_TEST
#ifdef RUN_TEST
#define CHANNELS 1
#define CHANNELS 2
#define SAMPLES 1021
#define TIMES 1000
@ -378,25 +377,32 @@ static void run_test (void) {
int16_t samples[SAMPLES];
int16_t samples_ref[SAMPLES];
int16_t samples_orig[SAMPLES];
int32_t volumes[CHANNELS];
int i, j;
int32_t volumes[CHANNELS + 16];
int i, j, padding;
pa_do_volume_func_t func;
func = pa_get_volume_func (PA_SAMPLE_S16NE);
printf ("checking\n");
printf ("checking %d\n", sizeof (samples));
for (j = 0; j < TIMES; j++) {
/*
for (i = 0; i < SAMPLES; i++) {
samples[i] samples_ref[i] = samples_orig[i] = rand() >> 16;
}
*/
pa_random (samples, sizeof (samples));
memcpy (samples_ref, samples, sizeof (samples));
memcpy (samples_orig, samples, sizeof (samples));
for (i = 0; i < CHANNELS; i++) {
for (i = 0; i < CHANNELS; i++)
volumes[i] = rand() >> 15;
}
for (padding = 0; padding < 16; padding++, i++)
volumes[i] = volumes[padding];
pa_volume_s16ne_mmx (samples, volumes, CHANNELS, SAMPLES * sizeof (int16_t));
func (samples_ref, volumes, CHANNELS, SAMPLES * sizeof (int16_t));
pa_volume_s16ne_mmx (samples, volumes, CHANNELS, sizeof (samples));
func (samples_ref, volumes, CHANNELS, sizeof (samples));
for (i = 0; i < SAMPLES; i++) {
if (samples[i] != samples_ref[i]) {