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Fix audio conversion U16_to_F32_SSE2 (bug 4186)

Sylvain Becker 2019-08-19 21:23:47 +02:00
parent 1d220401ce
commit 05f35c2420
1 changed files with 1 additions and 1 deletions
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2
src/audio/SDL_audiotypecvt.c
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@ -482,7 +482,7 @@ SDL_Convert_U16_to_F32_SSE2(SDL_AudioCVT *cvt, SDL_AudioFormat format)
if ((((size_t) src) & 15) == 0) { if ((((size_t) src) & 15) == 0) {
/* Aligned! Do SSE blocks as long as we have 16 bytes available. */ /* Aligned! Do SSE blocks as long as we have 16 bytes available. */
const __m128 divby32768 = _mm_set1_ps(DIVBY32768); const __m128 divby32768 = _mm_set1_ps(DIVBY32768);
const __m128 minus1 = _mm_set1_ps(1.0f); const __m128 minus1 = _mm_set1_ps(-1.0f);
while (i >= 8) { /* 8 * 16-bit */ while (i >= 8) { /* 8 * 16-bit */
const __m128i ints = _mm_load_si128((__m128i const *) src); /* get 8 sint16 into an XMM register. */ const __m128i ints = _mm_load_si128((__m128i const *) src); /* get 8 sint16 into an XMM register. */
/* treat as int32, shift left to clear every other sint16, then back right with zero-extend. Now sint32. */ /* treat as int32, shift left to clear every other sint16, then back right with zero-extend. Now sint32. */