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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*============================================================================= PCMBlitterLibX86.c =============================================================================*/ #include #if __i386__ || __LP64__ #define _MM_MALLOC_H_INCLUDED 1 // we don't want this header #include #include "IOAudioBlitterLib.h" #include #define kMaxFloat32 2147483520.0f // this is the biggest floating point number that result from a 32-bit int (bits are lost) // it's 2^31 - 128 static inline __m128i byteswap16( __m128i v ) { //rotate each 16 bit quantity by 8 bits return _mm_or_si128( _mm_slli_epi16( v, 8 ), _mm_srli_epi16( v, 8 ) ); } static inline __m128i byteswap32( __m128i v ) { //rotate each 32 bit quantity by 16 bits // 0xB1 = 10110001 = 2,3,0,1 v = _mm_shufflehi_epi16( _mm_shufflelo_epi16( v, 0xB1 ), 0xB1 ); return byteswap16( v ); } // =================================================================================================== #pragma mark - #pragma mark Float -> Int void Float32ToNativeInt16_X86( const Float32 *src, SInt16 *dst, unsigned int numToConvert ) { const float *src0 = src; int16_t *dst0 = dst; unsigned int count = numToConvert; if (count >= 8) { // vector -- requires 8+ samples ROUNDMODE_NEG_INF const __m128 vround = (const __m128) { 0.5f, 0.5f, 0.5f, 0.5f }; const __m128 vmin = (const __m128) { -32768.0f, -32768.0f, -32768.0f, -32768.0f }; const __m128 vmax = (const __m128) { 32767.0f, 32767.0f, 32767.0f, 32767.0f }; const __m128 vscale = (const __m128) { 32768.0f, 32768.0f, 32768.0f, 32768.0f }; __m128 vf0, vf1; __m128i vi0, vi1, vpack0; #define F32TOLE16 \ vf0 = _mm_mul_ps(vf0, vscale); \ vf1 = _mm_mul_ps(vf1, vscale); \ vf0 = _mm_add_ps(vf0, vround); \ vf1 = _mm_add_ps(vf1, vround); \ vf0 = _mm_max_ps(vf0, vmin); \ vf1 = _mm_max_ps(vf1, vmin); \ vf0 = _mm_min_ps(vf0, vmax); \ vf1 = _mm_min_ps(vf1, vmax); \ vi0 = _mm_cvtps_epi32(vf0); \ vi1 = _mm_cvtps_epi32(vf1); \ vpack0 = _mm_packs_epi32(vi0, vi1); int falign = (uintptr_t)src & 0xF; int ialign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vf0 = _mm_loadu_ps(src); vf1 = _mm_loadu_ps(src+4); F32TOLE16 _mm_storeu_si128((__m128i *)dst, vpack0); // advance such that the destination ints are aligned unsigned int n = (16 - ialign) / 2; src += n; dst += n; count -= n; falign = (uintptr_t)src & 0xF; if (falign != 0) { // unaligned loads, aligned stores while (count >= 8) { vf0 = _mm_loadu_ps(src); vf1 = _mm_loadu_ps(src+4); F32TOLE16 _mm_store_si128((__m128i *)dst, vpack0); src += 8; dst += 8; count -= 8; } goto VectorCleanup; } } // aligned loads, aligned stores while (count >= 8) { vf0 = _mm_load_ps(src); vf1 = _mm_load_ps(src+4); F32TOLE16 _mm_store_si128((__m128i *)dst, vpack0); src += 8; dst += 8; count -= 8; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 8; dst = dst0 + numToConvert - 8; vf0 = _mm_loadu_ps(src); vf1 = _mm_loadu_ps(src+4); F32TOLE16 _mm_storeu_si128((__m128i *)dst, vpack0); } RESTORE_ROUNDMODE return; } // scalar for small numbers of samples if (count > 0) { double scale = 2147483648.0, round = 32768.0, max32 = 2147483648.0 - 1.0 - 32768.0, min32 = 0.; ROUNDMODE_NEG_INF while (count-- > 0) { double f0 = *src++; f0 = f0 * scale + round; SInt32 i0 = FloatToInt(f0, min32, max32); i0 >>= 16; *dst++ = i0; } RESTORE_ROUNDMODE } } // =================================================================================================== void Float32ToSwapInt16_X86( const Float32 *src, SInt16 *dst, unsigned int numToConvert ) { const float *src0 = src; int16_t *dst0 = dst; unsigned int count = numToConvert; if (count >= 8) { // vector -- requires 8+ samples ROUNDMODE_NEG_INF const __m128 vround = (const __m128) { 0.5f, 0.5f, 0.5f, 0.5f }; const __m128 vmin = (const __m128) { -32768.0f, -32768.0f, -32768.0f, -32768.0f }; const __m128 vmax = (const __m128) { 32767.0f, 32767.0f, 32767.0f, 32767.0f }; const __m128 vscale = (const __m128) { 32768.0f, 32768.0f, 32768.0f, 32768.0f }; __m128 vf0, vf1; __m128i vi0, vi1, vpack0; #define F32TOBE16 \ vf0 = _mm_mul_ps(vf0, vscale); \ vf1 = _mm_mul_ps(vf1, vscale); \ vf0 = _mm_add_ps(vf0, vround); \ vf1 = _mm_add_ps(vf1, vround); \ vf0 = _mm_max_ps(vf0, vmin); \ vf1 = _mm_max_ps(vf1, vmin); \ vf0 = _mm_min_ps(vf0, vmax); \ vf1 = _mm_min_ps(vf1, vmax); \ vi0 = _mm_cvtps_epi32(vf0); \ vi1 = _mm_cvtps_epi32(vf1); \ vpack0 = _mm_packs_epi32(vi0, vi1); \ vpack0 = byteswap16(vpack0); int falign = (uintptr_t)src & 0xF; int ialign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vf0 = _mm_loadu_ps(src); vf1 = _mm_loadu_ps(src+4); F32TOBE16 _mm_storeu_si128((__m128i *)dst, vpack0); // and advance such that the destination ints are aligned unsigned int n = (16 - ialign) / 2; src += n; dst += n; count -= n; falign = (uintptr_t)src & 0xF; if (falign != 0) { // unaligned loads, aligned stores while (count >= 8) { vf0 = _mm_loadu_ps(src); vf1 = _mm_loadu_ps(src+4); F32TOBE16 _mm_store_si128((__m128i *)dst, vpack0); src += 8; dst += 8; count -= 8; } goto VectorCleanup; } } // aligned loads, aligned stores while (count >= 8) { vf0 = _mm_load_ps(src); vf1 = _mm_load_ps(src+4); F32TOBE16 _mm_store_si128((__m128i *)dst, vpack0); src += 8; dst += 8; count -= 8; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 8; dst = dst0 + numToConvert - 8; vf0 = _mm_loadu_ps(src); vf1 = _mm_loadu_ps(src+4); F32TOBE16 _mm_storeu_si128((__m128i *)dst, vpack0); } RESTORE_ROUNDMODE return; } // scalar for small numbers of samples if (count > 0) { double scale = 2147483648.0, round = 32768.0, max32 = 2147483648.0 - 1.0 - 32768.0, min32 = 0.; ROUNDMODE_NEG_INF while (count-- > 0) { double f0 = *src++; f0 = f0 * scale + round; SInt32 i0 = FloatToInt(f0, min32, max32); i0 >>= 16; #if __ppc__ *dst++ = OSSwapInt16(i0); #else *dst++ = i0; #endif } RESTORE_ROUNDMODE } } // =================================================================================================== void Float32ToNativeInt32_X86( const Float32 *src, SInt32 *dst, unsigned int numToConvert ) { const float *src0 = src; SInt32 *dst0 = dst; unsigned int count = numToConvert; if (count >= 4) { // vector -- requires 4+ samples ROUNDMODE_NEG_INF const __m128 vround = (const __m128) { 0.5f, 0.5f, 0.5f, 0.5f }; const __m128 vmin = (const __m128) { -2147483648.0f, -2147483648.0f, -2147483648.0f, -2147483648.0f }; const __m128 vmax = (const __m128) { kMaxFloat32, kMaxFloat32, kMaxFloat32, kMaxFloat32 }; const __m128 vscale = (const __m128) { 2147483648.0f, 2147483648.0f, 2147483648.0f, 2147483648.0f }; __m128 vf0; __m128i vi0; #define F32TOLE32(x) \ vf##x = _mm_mul_ps(vf##x, vscale); \ vf##x = _mm_add_ps(vf##x, vround); \ vf##x = _mm_max_ps(vf##x, vmin); \ vf##x = _mm_min_ps(vf##x, vmax); \ vi##x = _mm_cvtps_epi32(vf##x); \ int falign = (uintptr_t)src & 0xF; int ialign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vf0 = _mm_loadu_ps(src); F32TOLE32(0) _mm_storeu_si128((__m128i *)dst, vi0); // and advance such that the destination ints are aligned unsigned int n = (16 - ialign) / 4; src += n; dst += n; count -= n; falign = (uintptr_t)src & 0xF; if (falign != 0) { // unaligned loads, aligned stores while (count >= 4) { vf0 = _mm_loadu_ps(src); F32TOLE32(0) _mm_store_si128((__m128i *)dst, vi0); src += 4; dst += 4; count -= 4; } goto VectorCleanup; } } while (count >= 4) { vf0 = _mm_load_ps(src); F32TOLE32(0) _mm_store_si128((__m128i *)dst, vi0); src += 4; dst += 4; count -= 4; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 4; dst = dst0 + numToConvert - 4; vf0 = _mm_loadu_ps(src); F32TOLE32(0) _mm_storeu_si128((__m128i *)dst, vi0); } RESTORE_ROUNDMODE return; } // scalar for small numbers of samples if (count > 0) { double scale = 2147483648.0, round = 0.5, max32 = 2147483648.0 - 1.0 - 0.5, min32 = 0.; ROUNDMODE_NEG_INF while (count-- > 0) { double f0 = *src++; f0 = f0 * scale + round; SInt32 i0 = FloatToInt(f0, min32, max32); *dst++ = i0; } RESTORE_ROUNDMODE } } // =================================================================================================== void Float32ToSwapInt32_X86( const Float32 *src, SInt32 *dst, unsigned int numToConvert ) { const float *src0 = src; SInt32 *dst0 = dst; unsigned int count = numToConvert; if (count >= 4) { // vector -- requires 4+ samples ROUNDMODE_NEG_INF const __m128 vround = (const __m128) { 0.5f, 0.5f, 0.5f, 0.5f }; const __m128 vmin = (const __m128) { -2147483648.0f, -2147483648.0f, -2147483648.0f, -2147483648.0f }; const __m128 vmax = (const __m128) { kMaxFloat32, kMaxFloat32, kMaxFloat32, kMaxFloat32 }; const __m128 vscale = (const __m128) { 2147483648.0f, 2147483648.0f, 2147483648.0f, 2147483648.0f }; __m128 vf0; __m128i vi0; #define F32TOBE32(x) \ vf##x = _mm_mul_ps(vf##x, vscale); \ vf##x = _mm_add_ps(vf##x, vround); \ vf##x = _mm_max_ps(vf##x, vmin); \ vf##x = _mm_min_ps(vf##x, vmax); \ vi##x = _mm_cvtps_epi32(vf##x); \ vi##x = byteswap32(vi##x); int falign = (uintptr_t)src & 0xF; int ialign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vf0 = _mm_loadu_ps(src); F32TOBE32(0) _mm_storeu_si128((__m128i *)dst, vi0); // and advance such that the destination ints are aligned unsigned int n = (16 - ialign) / 4; src += n; dst += n; count -= n; falign = (uintptr_t)src & 0xF; if (falign != 0) { // unaligned loads, aligned stores while (count >= 4) { vf0 = _mm_loadu_ps(src); F32TOBE32(0) _mm_store_si128((__m128i *)dst, vi0); src += 4; dst += 4; count -= 4; } goto VectorCleanup; } } while (count >= 4) { vf0 = _mm_load_ps(src); F32TOBE32(0) _mm_store_si128((__m128i *)dst, vi0); src += 4; dst += 4; count -= 4; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 4; dst = dst0 + numToConvert - 4; vf0 = _mm_loadu_ps(src); F32TOBE32(0) _mm_storeu_si128((__m128i *)dst, vi0); } RESTORE_ROUNDMODE return; } // scalar for small numbers of samples if (count > 0) { double scale = 2147483648.0, round = 0.5, max32 = 2147483648.0 - 1.0 - 0.5, min32 = 0.; ROUNDMODE_NEG_INF while (count-- > 0) { double f0 = *src++; f0 = f0 * scale + round; SInt32 i0 = FloatToInt(f0, min32, max32); #if __ppc__ *dst++ = OSSwapInt32(i0); #else *dst++ = i0; #endif } RESTORE_ROUNDMODE } } // =================================================================================================== // ~14 instructions static inline __m128i Pack32ToLE24(__m128i val, __m128i mask) { __m128i store; val = _mm_srli_si128(val, 1); store = _mm_and_si128(val, mask); val = _mm_srli_si128(val, 1); mask = _mm_slli_si128(mask, 3); store = _mm_or_si128(store, _mm_and_si128(val, mask)); val = _mm_srli_si128(val, 1); mask = _mm_slli_si128(mask, 3); store = _mm_or_si128(store, _mm_and_si128(val, mask)); val = _mm_srli_si128(val, 1); mask = _mm_slli_si128(mask, 3); store = _mm_or_si128(store, _mm_and_si128(val, mask)); return store; } // marginally faster than scalar void Float32ToNativeInt24_X86( const Float32 *src, UInt8 *dst, unsigned int numToConvert ) { const Float32 *src0 = src; UInt8 *dst0 = dst; unsigned int count = numToConvert; if (count >= 6) { // vector -- requires 6+ samples ROUNDMODE_NEG_INF const __m128 vround = (const __m128) { 0.5f, 0.5f, 0.5f, 0.5f }; const __m128 vmin = (const __m128) { -2147483648.0f, -2147483648.0f, -2147483648.0f, -2147483648.0f }; const __m128 vmax = (const __m128) { kMaxFloat32, kMaxFloat32, kMaxFloat32, kMaxFloat32 }; const __m128 vscale = (const __m128) { 2147483648.0f, 2147483648.0f, 2147483648.0f, 2147483648.0f }; __m128i mask = _mm_setr_epi32(0x00FFFFFF, 0, 0, 0); // it is actually cheaper to copy and shift this mask on the fly than to have 4 of them __m128i store; union { UInt32 i[4]; __m128i v; } u; __m128 vf0; __m128i vi0; int falign = (uintptr_t)src & 0xF; if (falign != 0) { // do one unaligned conversion vf0 = _mm_loadu_ps(src); F32TOLE32(0) store = Pack32ToLE24(vi0, mask); _mm_storeu_si128((__m128i *)dst, store); // and advance such that the source floats are aligned unsigned int n = (16 - falign) / 4; src += n; dst += 3*n; // bytes count -= n; } while (count >= 6) { vf0 = _mm_load_ps(src); F32TOLE32(0) store = Pack32ToLE24(vi0, mask); _mm_storeu_si128((__m128i *)dst, store); // destination always unaligned src += 4; dst += 12; // bytes count -= 4; } if (count >= 4) { vf0 = _mm_load_ps(src); F32TOLE32(0) u.v = Pack32ToLE24(vi0, mask); ((UInt32 *)dst)[0] = u.i[0]; ((UInt32 *)dst)[1] = u.i[1]; ((UInt32 *)dst)[2] = u.i[2]; src += 4; dst += 12; // bytes count -= 4; } if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 4; dst = dst0 + 3*numToConvert - 12; vf0 = _mm_loadu_ps(src); F32TOLE32(0) u.v = Pack32ToLE24(vi0, mask); ((UInt32 *)dst)[0] = u.i[0]; ((UInt32 *)dst)[1] = u.i[1]; ((UInt32 *)dst)[2] = u.i[2]; } RESTORE_ROUNDMODE return; } // scalar for small numbers of samples if (count > 0) { double scale = 2147483648.0, round = 0.5, max32 = 2147483648.0 - 1.0 - 0.5, min32 = 0.; ROUNDMODE_NEG_INF while (count-- > 0) { double f0 = *src++; f0 = f0 * scale + round; UInt32 i0 = FloatToInt(f0, min32, max32); dst[0] = (UInt8)(i0 >> 8); dst[1] = (UInt8)(i0 >> 16); dst[2] = (UInt8)(i0 >> 24); dst += 3; } RESTORE_ROUNDMODE } } // =================================================================================================== #pragma mark - #pragma mark Int -> Float void NativeInt16ToFloat32_X86( const SInt16 *src, Float32 *dst, unsigned int numToConvert ) { const SInt16 *src0 = src; Float32 *dst0 = dst; unsigned int count = numToConvert; if (count >= 8) { // vector -- requires 8+ samples // convert the 16-bit words to the high word of 32-bit values #define LEI16TOF32(x, y) \ vi##x = _mm_unpacklo_epi16(zero, vpack##x); \ vi##y = _mm_unpackhi_epi16(zero, vpack##x); \ vf##x = _mm_cvtepi32_ps(vi##x); \ vf##y = _mm_cvtepi32_ps(vi##y); \ vf##x = _mm_mul_ps(vf##x, vscale); \ vf##y = _mm_mul_ps(vf##y, vscale); const __m128 vscale = (const __m128) { 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f }; const __m128i zero = _mm_setzero_si128(); __m128 vf0, vf1; __m128i vi0, vi1, vpack0; int ialign = (uintptr_t)src & 0xF; int falign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vpack0 = _mm_loadu_si128((__m128i const *)src); LEI16TOF32(0, 1) _mm_storeu_ps(dst, vf0); _mm_storeu_ps(dst+4, vf1); // and advance such that the destination floats are aligned unsigned int n = (16 - falign) / 4; src += n; dst += n; count -= n; ialign = (uintptr_t)src & 0xF; if (ialign != 0) { // unaligned loads, aligned stores while (count >= 8) { vpack0 = _mm_loadu_si128((__m128i const *)src); LEI16TOF32(0, 1) _mm_store_ps(dst, vf0); _mm_store_ps(dst+4, vf1); src += 8; dst += 8; count -= 8; } goto VectorCleanup; } } // aligned loads, aligned stores while (count >= 8) { vpack0 = _mm_load_si128((__m128i const *)src); LEI16TOF32(0, 1) _mm_store_ps(dst, vf0); _mm_store_ps(dst+4, vf1); src += 8; dst += 8; count -= 8; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 8; dst = dst0 + numToConvert - 8; vpack0 = _mm_loadu_si128((__m128i const *)src); LEI16TOF32(0, 1) _mm_storeu_ps(dst, vf0); _mm_storeu_ps(dst+4, vf1); } return; } // scalar for small numbers of samples if (count > 0) { double scale = 1./32768.f; while (count-- > 0) { SInt16 i = *src++; double f = (double)i * scale; *dst++ = f; } } } // =================================================================================================== void SwapInt16ToFloat32_X86( const SInt16 *src, Float32 *dst, unsigned int numToConvert ) { const SInt16 *src0 = src; Float32 *dst0 = dst; unsigned int count = numToConvert; if (count >= 8) { // vector -- requires 8+ samples // convert the 16-bit words to the high word of 32-bit values #define BEI16TOF32 \ vpack0 = byteswap16(vpack0); \ vi0 = _mm_unpacklo_epi16(zero, vpack0); \ vi1 = _mm_unpackhi_epi16(zero, vpack0); \ vf0 = _mm_cvtepi32_ps(vi0); \ vf1 = _mm_cvtepi32_ps(vi1); \ vf0 = _mm_mul_ps(vf0, vscale); \ vf1 = _mm_mul_ps(vf1, vscale); const __m128 vscale = (const __m128) { 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f }; const __m128i zero = _mm_setzero_si128(); __m128 vf0, vf1; __m128i vi0, vi1, vpack0; int ialign = (uintptr_t)src & 0xF; int falign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vpack0 = _mm_loadu_si128((__m128i const *)src); BEI16TOF32 _mm_storeu_ps(dst, vf0); _mm_storeu_ps(dst+4, vf1); // and advance such that the destination floats are aligned unsigned int n = (16 - falign) / 4; src += n; dst += n; count -= n; ialign = (uintptr_t)src & 0xF; if (ialign != 0) { // unaligned loads, aligned stores while (count >= 8) { vpack0 = _mm_loadu_si128((__m128i const *)src); BEI16TOF32 _mm_store_ps(dst, vf0); _mm_store_ps(dst+4, vf1); src += 8; dst += 8; count -= 8; } goto VectorCleanup; } } // aligned loads, aligned stores while (count >= 8) { vpack0 = _mm_load_si128((__m128i const *)src); BEI16TOF32 _mm_store_ps(dst, vf0); _mm_store_ps(dst+4, vf1); src += 8; dst += 8; count -= 8; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 8; dst = dst0 + numToConvert - 8; vpack0 = _mm_loadu_si128((__m128i const *)src); BEI16TOF32 _mm_storeu_ps(dst, vf0); _mm_storeu_ps(dst+4, vf1); } return; } // scalar for small numbers of samples if (count > 0) { double scale = 1./32768.f; while (count-- > 0) { SInt16 i = *src++; #if __ppc__ i = OSSwapInt16(i); #endif double f = (double)i * scale; *dst++ = f; } } } // =================================================================================================== void NativeInt32ToFloat32_X86( const SInt32 *src, Float32 *dst, unsigned int numToConvert ) { const SInt32 *src0 = src; Float32 *dst0 = dst; unsigned int count = numToConvert; if (count >= 4) { // vector -- requires 4+ samples #define LEI32TOF32(x) \ vf##x = _mm_cvtepi32_ps(vi##x); \ vf##x = _mm_mul_ps(vf##x, vscale); \ const __m128 vscale = (const __m128) { 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f }; __m128 vf0; __m128i vi0; int ialign = (uintptr_t)src & 0xF; int falign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vi0 = _mm_loadu_si128((__m128i const *)src); LEI32TOF32(0) _mm_storeu_ps(dst, vf0); // and advance such that the destination floats are aligned unsigned int n = (16 - falign) / 4; src += n; dst += n; count -= n; ialign = (uintptr_t)src & 0xF; if (ialign != 0) { // unaligned loads, aligned stores while (count >= 4) { vi0 = _mm_loadu_si128((__m128i const *)src); LEI32TOF32(0) _mm_store_ps(dst, vf0); src += 4; dst += 4; count -= 4; } goto VectorCleanup; } } // aligned loads, aligned stores while (count >= 4) { vi0 = _mm_load_si128((__m128i const *)src); LEI32TOF32(0) _mm_store_ps(dst, vf0); src += 4; dst += 4; count -= 4; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 4; dst = dst0 + numToConvert - 4; vi0 = _mm_loadu_si128((__m128i const *)src); LEI32TOF32(0) _mm_storeu_ps(dst, vf0); } return; } // scalar for small numbers of samples if (count > 0) { double scale = 1./2147483648.0f; while (count-- > 0) { SInt32 i = *src++; double f = (double)i * scale; *dst++ = f; } } } // =================================================================================================== void SwapInt32ToFloat32_X86( const SInt32 *src, Float32 *dst, unsigned int numToConvert ) { const SInt32 *src0 = src; Float32 *dst0 = dst; unsigned int count = numToConvert; if (count >= 4) { // vector -- requires 4+ samples #define BEI32TOF32(x) \ vi##x = byteswap32(vi##x); \ vf##x = _mm_cvtepi32_ps(vi##x); \ vf##x = _mm_mul_ps(vf##x, vscale); \ const __m128 vscale = (const __m128) { 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f, 1.0/2147483648.0f }; __m128 vf0; __m128i vi0; int ialign = (uintptr_t)src & 0xF; int falign = (uintptr_t)dst & 0xF; if (falign != 0 || ialign != 0) { // do one unaligned conversion vi0 = _mm_loadu_si128((__m128i const *)src); BEI32TOF32(0) _mm_storeu_ps(dst, vf0); // and advance such that the destination floats are aligned unsigned int n = (16 - falign) / 4; src += n; dst += n; count -= n; ialign = (uintptr_t)src & 0xF; if (ialign != 0) { // unaligned loads, aligned stores while (count >= 4) { vi0 = _mm_loadu_si128((__m128i const *)src); BEI32TOF32(0) _mm_store_ps(dst, vf0); src += 4; dst += 4; count -= 4; } goto VectorCleanup; } } // aligned loads, aligned stores while (count >= 4) { vi0 = _mm_load_si128((__m128i const *)src); BEI32TOF32(0) _mm_store_ps(dst, vf0); src += 4; dst += 4; count -= 4; } VectorCleanup: if (count > 0) { // unaligned cleanup -- just do one unaligned vector at the end src = src0 + numToConvert - 4; dst = dst0 + numToConvert - 4; vi0 = _mm_loadu_si128((__m128i const *)src); BEI32TOF32(0) _mm_storeu_ps(dst, vf0); } return; } // scalar for small numbers of samples if (count > 0) { double scale = 1./2147483648.0f; while (count-- > 0) { SInt32 i = *src++; #if __ppc__ i = OSSwapInt32(i); #endif double f = (double)i * scale; *dst++ = f; } } } #endif // __i386__