📄 mmx_win.cpp
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; to improve CPU-level parallellization. ; ; Load [eax] into mm0 and mm1 ; Load [ebx] into mm3 ; unpack words of mm0, mm1 and mm3 into mm0 and mm1 ; multiply-add mm0*mm6 and mm1*mm7, store results into mm0 and mm1 ; divide mm0 and mm1 by 512 (=right-shift by overlapDividerBits) ; pack the result into mm0 and store into [edx] ; ; Load [eax+8] into mm2 and mm3 ; Load [ebx+8] into mm4 ; unpack words of mm2, mm3 and mm4 into mm2 and mm3 ; multiply-add mm2*mm6 and mm3*mm7, store results into mm2 and mm3 ; divide mm2 and mm3 by 512 (=right-shift by overlapDividerBits) ; pack the result into mm2 and store into [edx+8] movq mm0, qword ptr [eax] ; mm0 = m1l m1r m0l m0r add edx, 16 movq mm3, qword ptr [ebx] ; mm3 = i1l i1r i0l i0r movq mm1, mm0 ; mm1 = m1l m1r m0l m0r movq mm2, qword ptr [eax+8] ; mm2 = m3l m3r m2l m2r punpcklwd mm0, mm3 ; mm0 = i0l m0l i0r m0r movq mm4, qword ptr [ebx+8] ; mm4 = i3l i3r i2l i2r punpckhwd mm1, mm3 ; mm1 = i1l m1l i1r m1r movq mm3, mm2 ; mm3 = m3l m3r m2l m2r punpcklwd mm2, mm4 ; mm2 = i2l m2l i2r m2r pmaddwd mm0, mm6 ; mm0 = i0l*m63+m0l*m62 i0r*m61+m0r*m60 punpckhwd mm3, mm4 ; mm3 = i3l m3l i3r m3r movd mm4, esi ; mm4 = overlapDividerBits pmaddwd mm1, mm7 ; mm1 = i1l*m73+m1l*m72 i1r*m71+m1r*m70 paddw mm6, mm5 paddw mm7, mm5 psrad mm0, mm4 ; mmo >>= overlapDividerBits pmaddwd mm2, mm6 ; mm2 = i2l*m63+m2l*m62 i2r*m61+m2r*m60 psrad mm1, mm4 ; mm1 >>= overlapDividerBits pmaddwd mm3, mm7 ; mm3 = i3l*m73+m3l*m72 i3r*m71+m3r*m70 psrad mm2, mm4 ; mm2 >>= overlapDividerBits packssdw mm0, mm1 ; mm0 = mm1h mm1l mm0h mm0l psrad mm3, mm4 ; mm3 >>= overlapDividerBits add eax, 16 paddw mm6, mm5 packssdw mm2, mm3 ; mm2 = mm2h mm2l mm3h mm3l paddw mm7, mm5 movq qword ptr [edx-16], mm0 add ebx, 16 movq qword ptr [edx-8], mm2 dec ecx jnz loop1 emms }}////////////////////////////////////////////////////////////////////////////////// implementation of MMX optimized functions of class 'FIRFilter'////////////////////////////////////////////////////////////////////////////////#include "FIRFilter.h"FIRFilterMMX::FIRFilterMMX() : FIRFilter(){ filterCoeffsUnalign = NULL;}FIRFilterMMX::~FIRFilterMMX(){ delete[] filterCoeffsUnalign;}// (overloaded) Calculates filter coefficients for MMX routinevoid FIRFilterMMX::setCoefficients(const short *coeffs, uint newLength, uint uResultDivFactor){ uint i; FIRFilter::setCoefficients(coeffs, newLength, uResultDivFactor); // Ensure that filter coeffs array is aligned to 16-byte boundary delete[] filterCoeffsUnalign; filterCoeffsUnalign = new short[2 * newLength + 8]; filterCoeffsAlign = (short *)(((uint)filterCoeffsUnalign + 15) & -16); // rearrange the filter coefficients for mmx routines for (i = 0;i < length; i += 4) { filterCoeffsAlign[2 * i + 0] = coeffs[i + 0]; filterCoeffsAlign[2 * i + 1] = coeffs[i + 2]; filterCoeffsAlign[2 * i + 2] = coeffs[i + 0]; filterCoeffsAlign[2 * i + 3] = coeffs[i + 2]; filterCoeffsAlign[2 * i + 4] = coeffs[i + 1]; filterCoeffsAlign[2 * i + 5] = coeffs[i + 3]; filterCoeffsAlign[2 * i + 6] = coeffs[i + 1]; filterCoeffsAlign[2 * i + 7] = coeffs[i + 3]; }}// mmx-optimized version of the filter routine for stereo sounduint FIRFilterMMX::evaluateFilterStereo(short *dest, const short *src, const uint numSamples) const{ // Create stack copies of the needed member variables for asm routines : uint local_length = length; uint local_lengthDiv8 = lengthDiv8; uint local_resultDivider = resultDivFactor; short *local_filterCoeffs = (short*)filterCoeffsAlign; _asm { ; Load (num_samples-aa_filter_length)/2 to edi as a i ; Load a pointer to samples to esi ; Load a pointer to destination to edx mov edi, numSamples mov esi, dword ptr src sub edi, local_length mov edx, dword ptr dest sar edi, 1 ; Load filter length/8 to ecx ; Load pointer to samples from esi to ebx ; Load counter from edi to ecx ; Load [ebx] to mm3 ; Load pointer to filter coefficients to eaxloop1: mov ebx, esi pxor mm0, mm0 mov ecx, local_lengthDiv8 pxor mm7, mm7 movq mm1, [ebx] ; mm1 = l1 r1 l0 r0 mov eax, local_filterCoeffsloop2: movq mm2, [ebx+8] ; mm2 = l3 r3 l2 r2 movq mm4, mm1 ; mm4 = l1 r1 l0 r0 movq mm3, [ebx+16] ; mm3 = l5 r5 l4 r4 punpckhwd mm1, mm2 ; mm1 = l3 l1 r3 r1 movq mm6, mm2 ; mm6 = l3 r3 l2 r2 punpcklwd mm4, mm2 ; mm4 = l2 l0 r2 r0 movq mm2, qword ptr [eax] ; mm2 = f2 f0 f2 f0 movq mm5, mm1 ; mm5 = l3 l1 r3 r1 punpcklwd mm6, mm3 ; mm6 = l4 l2 r4 r2 pmaddwd mm4, mm2 ; mm4 = l2*f2+l0*f0 r2*f2+r0*f0 pmaddwd mm5, mm2 ; mm5 = l3*f2+l1*f0 r3*f2+l1*f0 movq mm2, qword ptr [eax+8] ; mm2 = f3 f1 f3 f1 paddd mm0, mm4 ; mm0 += s02*f02 movq mm4, mm3 ; mm4 = l1 r1 l0 r0 pmaddwd mm1, mm2 ; mm1 = l3*f3+l1*f1 r3*f3+l1*f1 paddd mm7, mm5 ; mm7 += s13*f02 pmaddwd mm6, mm2 ; mm6 = l4*f3+l2*f1 r4*f3+f4*f1 movq mm2, [ebx+24] ; mm2 = l3 r3 l2 r2 paddd mm0, mm1 ; mm0 += s31*f31 movq mm1, [ebx+32] ; mm1 = l5 r5 l4 r4 paddd mm7, mm6 ; mm7 += s42*f31 punpckhwd mm3, mm2 ; mm3 = l3 l1 r3 r1 movq mm6, mm2 ; mm6 = l3 r3 l2 r2 punpcklwd mm4, mm2 ; mm4 = l2 l0 r2 r0 movq mm2, qword ptr [eax+16] ; mm2 = f2 f0 f2 f0 movq mm5, mm3 ; mm5 = l3 l1 r3 r1 punpcklwd mm6, mm1 ; mm6 = l4 l2 r4 r2 add eax, 32 pmaddwd mm4, mm2 ; mm4 = l2*f2+l0*f0 r2*f2+r0*f0 add ebx, 32 pmaddwd mm5, mm2 ; mm5 = l3*f2+l1*f0 r3*f2+l1*f0 movq mm2, qword ptr [eax-8] ; mm2 = f3 f1 f3 f1 paddd mm0, mm4 ; mm0 += s02*f02 pmaddwd mm3, mm2 ; mm3 = l3*f3+l1*f1 r3*f3+l1*f1 paddd mm7, mm5 ; mm7 += s13*f02 pmaddwd mm6, mm2 ; mm6 = l4*f3+l2*f1 r4*f3+f4*f1 paddd mm0, mm3 ; mm0 += s31*f31 paddd mm7, mm6 ; mm7 += s42*f31 dec ecx jnz loop2 ; Divide mm0 and mm7 by 8192 (= right-shift by 13), ; pack and store to [edx] movd mm4, local_resultDivider; psrad mm0, mm4 ; divider the result add edx, 8 psrad mm7, mm4 ; divider the result add esi, 8 packssdw mm0, mm7 movq qword ptr [edx-8], mm0 dec edi jnz loop1 emms } return (numSamples & 0xfffffffe) - local_length;}#endif // ALLOW_MMX⌨️ 快捷键说明
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