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Use vec_madd instead of vec_mul.

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vec_mul was apparently a POWER7 instruction.
This commit is contained in:
Themaister 2012-11-06 09:26:28 +01:00
parent 876bf69a80
commit 330e724f34
2 changed files with 3 additions and 14 deletions
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15
audio/utils.c
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@ -26,11 +26,7 @@ void audio_convert_s16_to_float_C(float *out,
{
gain = gain / 0x8000;
for (size_t i = 0; i < samples; i++)
#ifdef __CELLOS_LV2__
out[i] = (float)in[i] / 0x8000;
#else
out[i] = (float)in[i] * gain;
#endif
}
void audio_convert_float_to_s16_C(int16_t *out,
@ -93,6 +89,7 @@ void audio_convert_s16_to_float_altivec(float *out,
const int16_t *in, size_t samples, float gain)
{
const vector float gain_vec = vec_splats(gain);
const vector float zero_vec = vec_splats(0.0f);
// Unaligned loads/store is a bit expensive, so we optimize for the good path (very likely).
if (((uintptr_t)out & 15) + ((uintptr_t)in & 15) == 0)
{
@ -102,14 +99,8 @@ void audio_convert_s16_to_float_altivec(float *out,
vector signed short input = vec_ld(0, in);
vector signed int hi = vec_unpackh(input);
vector signed int lo = vec_unpackl(input);
#ifdef __CELLOS_LV2__
/* vec_mul not supported */
vector float out_hi = vec_ctf(hi, 15);
vector float out_lo = vec_ctf(lo, 15);
#else
vector float out_hi = vec_mul(vec_ctf(hi, 15), gain_vec);
vector float out_lo = vec_mul(vec_ctf(lo, 15), gain_vec);
#endif
vector float out_hi = vec_madd(vec_ctf(hi, 15), gain_vec, zero_vec);
vector float out_lo = vec_madd(vec_ctf(lo, 15), gain_vec, zero_vec);
vec_st(out_hi, 0, out);
vec_st(out_lo, 16, out);

2
console/griffin/griffin.c
View File

@ -229,8 +229,6 @@ RSOUND
/*============================================================
AUDIO UTILS
============================================================ */
/* PS3 right now doesn't compile with the Altivec intrinsics
* used here */
#include "../../audio/utils.c"
/*============================================================