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(audio conversion) Optimize array accesses

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This commit is contained in:
twinaphex 2020-08-19 02:46:54 +02:00
parent b4d2f2a7ed
commit 8613ece7f5
2 changed files with 17 additions and 7 deletions
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13
libretro-common/audio/conversion/float_to_s16.c
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@ -50,7 +50,9 @@ void convert_float_s16_asm(int16_t *out, const float *in, size_t samples);
void convert_float_to_s16(int16_t *out,
const float *in, size_t samples)
{
size_t i = 0;
int16_t *out_ptr = NULL;
const float *in_ptr = NULL;
size_t i = 0;
#if defined(__SSE2__)
__m128 factor = _mm_set1_ps((float)0x8000);
@ -135,10 +137,13 @@ void convert_float_to_s16(int16_t *out,
#endif
for (; i < samples; i++)
for (
out_ptr = &out[i], in_ptr = &in[i]
; i < samples
; out_ptr++, in_ptr++, i++)
{
int32_t val = (int32_t)(in[i] * 0x8000);
out[i] = (val > 0x7FFF) ? 0x7FFF :
int32_t val = (int32_t)(*in_ptr * 0x8000);
*out_ptr = (val > 0x7FFF) ? 0x7FFF :
(val < -0x8000 ? -0x8000 : (int16_t)val);
}
}

11
libretro-common/audio/conversion/s16_to_float.c
View File

@ -50,7 +50,9 @@ void convert_s16_float_asm(float *out, const int16_t *in,
void convert_s16_to_float(float *out,
const int16_t *in, size_t samples, float gain)
{
unsigned i = 0;
float *out_ptr = NULL;
const int16_t *in_ptr = NULL;
unsigned i = 0;
#if defined(__SSE2__)
float fgain = gain / UINT32_C(0x80000000);
@ -169,8 +171,11 @@ void convert_s16_to_float(float *out,
#endif
for (; i < samples; i++)
out[i] = (float)in[i] * gain;
for (
out_ptr = &out[i], in_ptr = &in[i]
; i < samples
; out_ptr++, in_ptr++, i++)
*out_ptr = (float)*in_ptr * gain;
}
/**