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dhewm3-sdk/idlib/math/Simd_SSE2.cpp
dhewg 055b80e859 Always compile all SIMD code 
Protect all SIMD implementations with the according defines and
let the compiler decide if it supports the intructions.

Linux will still use Simd_Generic because CPU feature runtime
detection is missing.
2018-08-20 01:46:26 +02:00

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/*
===========================================================================
Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/
#include "../precompiled.h"
#pragma hdrstop
#include "Simd_Generic.h"
#include "Simd_MMX.h"
#include "Simd_SSE.h"
#include "Simd_SSE2.h"
//===============================================================
//
// SSE2 implementation of idSIMDProcessor
//
//===============================================================
#if defined(__GNUC__) && defined(__SSE2__)
#include <emmintrin.h>
#define SHUFFLEPS( x, y, z, w ) (( (x) & 3 ) << 6 | ( (y) & 3 ) << 4 | ( (z) & 3 ) << 2 | ( (w) & 3 ))
#define R_SHUFFLEPS( x, y, z, w ) (( (w) & 3 ) << 6 | ( (z) & 3 ) << 4 | ( (y) & 3 ) << 2 | ( (x) & 3 ))
/*
============
idSIMD_SSE2::GetName
============
*/
const char * idSIMD_SSE2::GetName( void ) const {
return "MMX & SSE & SSE2";
}
/*
============
idSIMD_SSE::CmpLT
dst[i] |= ( src0[i] < constant ) << bitNum;
============
*/
void VPCALL idSIMD_SSE2::CmpLT( byte *dst, const byte bitNum, const float *src0, const float constant, const int count ) {
int i, cnt, pre, post;
float *aligned;
__m128 xmm0, xmm1;
__m128i xmm0i;
int cnt_l;
char *src0_p;
char *constant_p;
char *dst_p;
int mask_l;
int dst_l;
/* if the float array is not aligned on a 4 byte boundary */
if ( ptrdiff_t(src0) & 3 ) {
/* unaligned memory access */
pre = 0;
cnt = count >> 2;
post = count - (cnt<<2);
/*
__asm mov edx, cnt
__asm test edx, edx
__asm je doneCmp
*/
cnt_l = cnt;
if(cnt_l != 0) {
/*
__asm push ebx
__asm neg edx
__asm mov esi, src0
__asm prefetchnta [esi+64]
__asm movss xmm1, constant
__asm shufps xmm1, xmm1, R_SHUFFLEPS( 0, 0, 0, 0 )
__asm mov edi, dst
__asm mov cl, bitNum
*/
cnt_l = -cnt_l;
src0_p = (char *) src0;
_mm_prefetch(src0_p+64, _MM_HINT_NTA);
constant_p = (char *) &constant;
xmm1 = _mm_load_ss((float *)constant_p);
xmm1 = _mm_shuffle_ps(xmm1, xmm1, R_SHUFFLEPS( 0, 0, 0, 0 ));
dst_p = (char *)dst;
/*
__asm loopNA:
*/
do {
/*
__asm movups xmm0, [esi]
__asm prefetchnta [esi+128]
__asm cmpltps xmm0, xmm1
__asm movmskps eax, xmm0 \
__asm mov ah, al
__asm shr ah, 1
__asm mov bx, ax
__asm shl ebx, 14
__asm mov bx, ax
__asm and ebx, 0x01010101
__asm shl ebx, cl
__asm or ebx, dword ptr [edi]
__asm mov dword ptr [edi], ebx
__asm add esi, 16
__asm add edi, 4
__asm inc edx
__asm jl loopNA
__asm pop ebx
*/
xmm0 = _mm_loadu_ps((float *) src0_p);
_mm_prefetch(src0_p+128, _MM_HINT_NTA);
xmm0 = _mm_cmplt_ps(xmm0, xmm1);
// Simplify using SSE2
xmm0i = (__m128i) xmm0;
xmm0i = _mm_packs_epi32(xmm0i, xmm0i);
xmm0i = _mm_packs_epi16(xmm0i, xmm0i);
mask_l = _mm_cvtsi128_si32(xmm0i);
// End
mask_l = mask_l & 0x01010101;
mask_l = mask_l << bitNum;
dst_l = *((int *) dst_p);
mask_l = mask_l | dst_l;
*((int *) dst_p) = mask_l;
src0_p = src0_p + 16;
dst_p = dst_p + 4;
cnt_l = cnt_l + 1;
} while (cnt_l < 0);
}
}
else {
/* aligned memory access */
aligned = (float *) ((ptrdiff_t(src0) + 15) & ~15);
if ( ptrdiff_t(aligned) > ptrdiff_t(src0) + count ) {
pre = count;
post = 0;
}
else {
pre = aligned - src0;
cnt = (count - pre) >> 2;
post = count - pre - (cnt<<2);
/*
__asm mov edx, cnt
__asm test edx, edx
__asm je doneCmp
*/
cnt_l = cnt;
if(cnt_l != 0) {
/*
__asm push ebx
__asm neg edx
__asm mov esi, aligned
__asm prefetchnta [esi+64]
__asm movss xmm1, constant
__asm shufps xmm1, xmm1, R_SHUFFLEPS( 0, 0, 0, 0 )
__asm mov edi, dst
__asm add edi, pre
__asm mov cl, bitNum
*/
cnt_l = -cnt_l;
src0_p = (char *) src0;
_mm_prefetch(src0_p+64, _MM_HINT_NTA);
constant_p = (char *) &constant;
xmm1 = _mm_load_ss((float *)constant_p);
xmm1 = _mm_shuffle_ps(xmm1, xmm1, R_SHUFFLEPS( 0, 0, 0, 0 ));
dst_p = (char *)dst;
dst_p = dst_p + pre;
/*
__asm loopA:
*/
do {
/*
__asm movaps xmm0, [esi]
__asm prefetchnta [esi+128]
__asm cmpltps xmm0, xmm1
__asm movmskps eax, xmm0 \
__asm mov ah, al
__asm shr ah, 1
__asm mov bx, ax
__asm shl ebx, 14
__asm mov bx, ax
__asm and ebx, 0x01010101
__asm shl ebx, cl
__asm or ebx, dword ptr [edi]
__asm mov dword ptr [edi], ebx
__asm add esi, 16
__asm add edi, 4
__asm inc edx
__asm jl loopA
__asm pop ebx
*/
xmm0 = _mm_load_ps((float *) src0_p);
_mm_prefetch(src0_p+128, _MM_HINT_NTA);
xmm0 = _mm_cmplt_ps(xmm0, xmm1);
// Simplify using SSE2
xmm0i = (__m128i) xmm0;
xmm0i = _mm_packs_epi32(xmm0i, xmm0i);
xmm0i = _mm_packs_epi16(xmm0i, xmm0i);
mask_l = _mm_cvtsi128_si32(xmm0i);
// End
mask_l = mask_l & 0x01010101;
mask_l = mask_l << bitNum;
dst_l = *((int *) dst_p);
mask_l = mask_l | dst_l;
*((int *) dst_p) = mask_l;
src0_p = src0_p + 16;
dst_p = dst_p + 4;
cnt_l = cnt_l + 1;
} while (cnt_l < 0);
}
}
}
/*
doneCmp:
*/
float c = constant;
for ( i = 0; i < pre; i++ ) {
dst[i] |= ( src0[i] < c ) << bitNum;
}
for ( i = count - post; i < count; i++ ) {
dst[i] |= ( src0[i] < c ) << bitNum;
}
}
#elif defined(_WIN32)
#include <xmmintrin.h>
#define SHUFFLEPS( x, y, z, w ) (( (x) & 3 ) << 6 | ( (y) & 3 ) << 4 | ( (z) & 3 ) << 2 | ( (w) & 3 ))
#define R_SHUFFLEPS( x, y, z, w ) (( (w) & 3 ) << 6 | ( (z) & 3 ) << 4 | ( (y) & 3 ) << 2 | ( (x) & 3 ))
#define SHUFFLEPD( x, y ) (( (x) & 1 ) << 1 | ( (y) & 1 ))
#define R_SHUFFLEPD( x, y ) (( (y) & 1 ) << 1 | ( (x) & 1 ))
#define ALIGN4_INIT1( X, INIT ) ALIGN16( static X[4] ) = { INIT, INIT, INIT, INIT }
#define ALIGN4_INIT4( X, I0, I1, I2, I3 ) ALIGN16( static X[4] ) = { I0, I1, I2, I3 }
#define ALIGN8_INIT1( X, INIT ) ALIGN16( static X[8] ) = { INIT, INIT, INIT, INIT, INIT, INIT, INIT, INIT }
ALIGN8_INIT1( unsigned short SIMD_W_zero, 0 );
ALIGN8_INIT1( unsigned short SIMD_W_maxShort, 1<<15 );
ALIGN4_INIT4( unsigned int SIMD_SP_singleSignBitMask, (unsigned int) ( 1 << 31 ), 0, 0, 0 );
ALIGN4_INIT1( unsigned int SIMD_SP_signBitMask, (unsigned int) ( 1 << 31 ) );
ALIGN4_INIT1( unsigned int SIMD_SP_absMask, (unsigned int) ~( 1 << 31 ) );
ALIGN4_INIT1( unsigned int SIMD_SP_infinityMask, (unsigned int) ~( 1 << 23 ) );
ALIGN4_INIT1( float SIMD_SP_zero, 0.0f );
ALIGN4_INIT1( float SIMD_SP_one, 1.0f );
ALIGN4_INIT1( float SIMD_SP_two, 2.0f );
ALIGN4_INIT1( float SIMD_SP_three, 3.0f );
ALIGN4_INIT1( float SIMD_SP_four, 4.0f );
ALIGN4_INIT1( float SIMD_SP_maxShort, (1<<15) );
ALIGN4_INIT1( float SIMD_SP_tiny, 1e-10f );
ALIGN4_INIT1( float SIMD_SP_PI, idMath::PI );
ALIGN4_INIT1( float SIMD_SP_halfPI, idMath::HALF_PI );
ALIGN4_INIT1( float SIMD_SP_twoPI, idMath::TWO_PI );
ALIGN4_INIT1( float SIMD_SP_oneOverTwoPI, 1.0f / idMath::TWO_PI );
ALIGN4_INIT1( float SIMD_SP_infinity, idMath::INFINITY );
/*
============
idSIMD_SSE2::GetName
============
*/
const char * idSIMD_SSE2::GetName( void ) const {
return "MMX & SSE & SSE2";
}
#if 0 // the SSE2 code is ungodly slow
/*
============
idSIMD_SSE2::MatX_LowerTriangularSolve
solves x in Lx = b for the n * n sub-matrix of L
if skip > 0 the first skip elements of x are assumed to be valid already
L has to be a lower triangular matrix with (implicit) ones on the diagonal
x == b is allowed
============
*/
void VPCALL idSIMD_SSE2::MatX_LowerTriangularSolve( const idMatX &L, float *x, const float *b, const int n, int skip ) {
int nc;
const float *lptr;
if ( skip >= n ) {
return;
}
lptr = L[skip];
nc = L.GetNumColumns();
// unrolled cases for n < 8
if ( n < 8 ) {
#define NSKIP( n, s ) ((n<<3)|(s&7))
switch( NSKIP( n, skip ) ) {
case NSKIP( 1, 0 ): x[0] = b[0];
return;
case NSKIP( 2, 0 ): x[0] = b[0];
case NSKIP( 2, 1 ): x[1] = b[1] - lptr[1*nc+0] * x[0];
return;
case NSKIP( 3, 0 ): x[0] = b[0];
case NSKIP( 3, 1 ): x[1] = b[1] - lptr[1*nc+0] * x[0];
case NSKIP( 3, 2 ): x[2] = b[2] - lptr[2*nc+0] * x[0] - lptr[2*nc+1] * x[1];
return;
case NSKIP( 4, 0 ): x[0] = b[0];
case NSKIP( 4, 1 ): x[1] = b[1] - lptr[1*nc+0] * x[0];
case NSKIP( 4, 2 ): x[2] = b[2] - lptr[2*nc+0] * x[0] - lptr[2*nc+1] * x[1];
case NSKIP( 4, 3 ): x[3] = b[3] - lptr[3*nc+0] * x[0] - lptr[3*nc+1] * x[1] - lptr[3*nc+2] * x[2];
return;
case NSKIP( 5, 0 ): x[0] = b[0];
case NSKIP( 5, 1 ): x[1] = b[1] - lptr[1*nc+0] * x[0];
case NSKIP( 5, 2 ): x[2] = b[2] - lptr[2*nc+0] * x[0] - lptr[2*nc+1] * x[1];
case NSKIP( 5, 3 ): x[3] = b[3] - lptr[3*nc+0] * x[0] - lptr[3*nc+1] * x[1] - lptr[3*nc+2] * x[2];
case NSKIP( 5, 4 ): x[4] = b[4] - lptr[4*nc+0] * x[0] - lptr[4*nc+1] * x[1] - lptr[4*nc+2] * x[2] - lptr[4*nc+3] * x[3];
return;
case NSKIP( 6, 0 ): x[0] = b[0];
case NSKIP( 6, 1 ): x[1] = b[1] - lptr[1*nc+0] * x[0];
case NSKIP( 6, 2 ): x[2] = b[2] - lptr[2*nc+0] * x[0] - lptr[2*nc+1] * x[1];
case NSKIP( 6, 3 ): x[3] = b[3] - lptr[3*nc+0] * x[0] - lptr[3*nc+1] * x[1] - lptr[3*nc+2] * x[2];
case NSKIP( 6, 4 ): x[4] = b[4] - lptr[4*nc+0] * x[0] - lptr[4*nc+1] * x[1] - lptr[4*nc+2] * x[2] - lptr[4*nc+3] * x[3];
case NSKIP( 6, 5 ): x[5] = b[5] - lptr[5*nc+0] * x[0] - lptr[5*nc+1] * x[1] - lptr[5*nc+2] * x[2] - lptr[5*nc+3] * x[3] - lptr[5*nc+4] * x[4];
return;
case NSKIP( 7, 0 ): x[0] = b[0];
case NSKIP( 7, 1 ): x[1] = b[1] - lptr[1*nc+0] * x[0];
case NSKIP( 7, 2 ): x[2] = b[2] - lptr[2*nc+0] * x[0] - lptr[2*nc+1] * x[1];
case NSKIP( 7, 3 ): x[3] = b[3] - lptr[3*nc+0] * x[0] - lptr[3*nc+1] * x[1] - lptr[3*nc+2] * x[2];
case NSKIP( 7, 4 ): x[4] = b[4] - lptr[4*nc+0] * x[0] - lptr[4*nc+1] * x[1] - lptr[4*nc+2] * x[2] - lptr[4*nc+3] * x[3];
case NSKIP( 7, 5 ): x[5] = b[5] - lptr[5*nc+0] * x[0] - lptr[5*nc+1] * x[1] - lptr[5*nc+2] * x[2] - lptr[5*nc+3] * x[3] - lptr[5*nc+4] * x[4];
case NSKIP( 7, 6 ): x[6] = b[6] - lptr[6*nc+0] * x[0] - lptr[6*nc+1] * x[1] - lptr[6*nc+2] * x[2] - lptr[6*nc+3] * x[3] - lptr[6*nc+4] * x[4] - lptr[6*nc+5] * x[5];
return;
}
return;
}
// process first 4 rows
switch( skip ) {
case 0: x[0] = b[0];
case 1: x[1] = b[1] - lptr[1*nc+0] * x[0];
case 2: x[2] = b[2] - lptr[2*nc+0] * x[0] - lptr[2*nc+1] * x[1];
case 3: x[3] = b[3] - lptr[3*nc+0] * x[0] - lptr[3*nc+1] * x[1] - lptr[3*nc+2] * x[2];
skip = 4;
}
lptr = L[skip];
__asm {
push ebx
mov eax, skip // eax = i
shl eax, 2 // eax = i*4
mov edx, n // edx = n
shl edx, 2 // edx = n*4
mov esi, x // esi = x
mov edi, lptr // edi = lptr
add esi, eax
add edi, eax
mov ebx, b // ebx = b
// aligned
looprow:
mov ecx, eax
neg ecx
cvtps2pd xmm0, [esi+ecx]
cvtps2pd xmm2, [edi+ecx]
mulpd xmm0, xmm2
cvtps2pd xmm1, [esi+ecx+8]
cvtps2pd xmm3, [edi+ecx+8]
mulpd xmm1, xmm3
add ecx, 20*4
jg donedot16
dot16:
cvtps2pd xmm2, [esi+ecx-(16*4)]
cvtps2pd xmm3, [edi+ecx-(16*4)]
cvtps2pd xmm4, [esi+ecx-(14*4)]
mulpd xmm2, xmm3
cvtps2pd xmm5, [edi+ecx-(14*4)]
addpd xmm0, xmm2
cvtps2pd xmm2, [esi+ecx-(12*4)]
mulpd xmm4, xmm5
cvtps2pd xmm3, [edi+ecx-(12*4)]
addpd xmm1, xmm4
cvtps2pd xmm4, [esi+ecx-(10*4)]
mulpd xmm2, xmm3
cvtps2pd xmm5, [edi+ecx-(10*4)]
addpd xmm0, xmm2
cvtps2pd xmm2, [esi+ecx-(8*4)]
mulpd xmm4, xmm5
cvtps2pd xmm3, [edi+ecx-(8*4)]
addpd xmm1, xmm4
cvtps2pd xmm4, [esi+ecx-(6*4)]
mulpd xmm2, xmm3
cvtps2pd xmm5, [edi+ecx-(6*4)]
addpd xmm0, xmm2
cvtps2pd xmm2, [esi+ecx-(4*4)]
mulpd xmm4, xmm5
cvtps2pd xmm3, [edi+ecx-(4*4)]
addpd xmm1, xmm4
cvtps2pd xmm4, [esi+ecx-(2*4)]
mulpd xmm2, xmm3
cvtps2pd xmm5, [edi+ecx-(2*4)]
addpd xmm0, xmm2
add ecx, 16*4
mulpd xmm4, xmm5
addpd xmm1, xmm4
jle dot16
donedot16:
sub ecx, 8*4
jg donedot8
dot8:
cvtps2pd xmm2, [esi+ecx-(8*4)]
cvtps2pd xmm3, [edi+ecx-(8*4)]
cvtps2pd xmm7, [esi+ecx-(6*4)]
mulpd xmm2, xmm3
cvtps2pd xmm5, [edi+ecx-(6*4)]
addpd xmm0, xmm2
cvtps2pd xmm6, [esi+ecx-(4*4)]
mulpd xmm7, xmm5
cvtps2pd xmm3, [edi+ecx-(4*4)]
addpd xmm1, xmm7
cvtps2pd xmm4, [esi+ecx-(2*4)]
mulpd xmm6, xmm3
cvtps2pd xmm7, [edi+ecx-(2*4)]
addpd xmm0, xmm6
add ecx, 8*4
mulpd xmm4, xmm7
addpd xmm1, xmm4
donedot8:
sub ecx, 4*4
jg donedot4
dot4:
cvtps2pd xmm2, [esi+ecx-(4*4)]
cvtps2pd xmm3, [edi+ecx-(4*4)]
cvtps2pd xmm4, [esi+ecx-(2*4)]
mulpd xmm2, xmm3
cvtps2pd xmm5, [edi+ecx-(2*4)]
addpd xmm0, xmm2
add ecx, 4*4
mulpd xmm4, xmm5
addpd xmm1, xmm4
donedot4:
addpd xmm0, xmm1
movaps xmm1, xmm0
shufpd xmm1, xmm1, R_SHUFFLEPD( 1, 0 )
addsd xmm0, xmm1
sub ecx, 4*4
jz dot0
add ecx, 4
jz dot1
add ecx, 4
jz dot2
//dot3:
cvtss2sd xmm1, [esi-(3*4)]
cvtss2sd xmm2, [edi-(3*4)]
mulsd xmm1, xmm2
addsd xmm0, xmm1
dot2:
cvtss2sd xmm3, [esi-(2*4)]
cvtss2sd xmm4, [edi-(2*4)]
mulsd xmm3, xmm4
addsd xmm0, xmm3
dot1:
cvtss2sd xmm5, [esi-(1*4)]
cvtss2sd xmm6, [edi-(1*4)]
mulsd xmm5, xmm6
addsd xmm0, xmm5
dot0:
cvtss2sd xmm1, [ebx+eax]
subsd xmm1, xmm0
cvtsd2ss xmm0, xmm1
movss [esi], xmm0
add eax, 4
cmp eax, edx
jge done
add esi, 4
mov ecx, nc
shl ecx, 2
add edi, ecx
add edi, 4
jmp looprow
// done
done:
pop ebx
}
}
/*
============
idSIMD_SSE2::MatX_LowerTriangularSolveTranspose
solves x in L'x = b for the n * n sub-matrix of L
L has to be a lower triangular matrix with (implicit) ones on the diagonal
x == b is allowed
============
*/
void VPCALL idSIMD_SSE2::MatX_LowerTriangularSolveTranspose( const idMatX &L, float *x, const float *b, const int n ) {
int nc;
const float *lptr;
lptr = L.ToFloatPtr();
nc = L.GetNumColumns();
// unrolled cases for n < 8
if ( n < 8 ) {
switch( n ) {
case 0:
return;
case 1:
x[0] = b[0];
return;
case 2:
x[1] = b[1];
x[0] = b[0] - lptr[1*nc+0] * x[1];
return;
case 3:
x[2] = b[2];
x[1] = b[1] - lptr[2*nc+1] * x[2];
x[0] = b[0] - lptr[2*nc+0] * x[2] - lptr[1*nc+0] * x[1];
return;
case 4:
x[3] = b[3];
x[2] = b[2] - lptr[3*nc+2] * x[3];
x[1] = b[1] - lptr[3*nc+1] * x[3] - lptr[2*nc+1] * x[2];
x[0] = b[0] - lptr[3*nc+0] * x[3] - lptr[2*nc+0] * x[2] - lptr[1*nc+0] * x[1];
return;
case 5:
x[4] = b[4];
x[3] = b[3] - lptr[4*nc+3] * x[4];
x[2] = b[2] - lptr[4*nc+2] * x[4] - lptr[3*nc+2] * x[3];
x[1] = b[1] - lptr[4*nc+1] * x[4] - lptr[3*nc+1] * x[3] - lptr[2*nc+1] * x[2];
x[0] = b[0] - lptr[4*nc+0] * x[4] - lptr[3*nc+0] * x[3] - lptr[2*nc+0] * x[2] - lptr[1*nc+0] * x[1];
return;
case 6:
x[5] = b[5];
x[4] = b[4] - lptr[5*nc+4] * x[5];
x[3] = b[3] - lptr[5*nc+3] * x[5] - lptr[4*nc+3] * x[4];
x[2] = b[2] - lptr[5*nc+2] * x[5] - lptr[4*nc+2] * x[4] - lptr[3*nc+2] * x[3];
x[1] = b[1] - lptr[5*nc+1] * x[5] - lptr[4*nc+1] * x[4] - lptr[3*nc+1] * x[3] - lptr[2*nc+1] * x[2];
x[0] = b[0] - lptr[5*nc+0] * x[5] - lptr[4*nc+0] * x[4] - lptr[3*nc+0] * x[3] - lptr[2*nc+0] * x[2] - lptr[1*nc+0] * x[1];
return;
case 7:
x[6] = b[6];
x[5] = b[5] - lptr[6*nc+5] * x[6];
x[4] = b[4] - lptr[6*nc+4] * x[6] - lptr[5*nc+4] * x[5];
x[3] = b[3] - lptr[6*nc+3] * x[6] - lptr[5*nc+3] * x[5] - lptr[4*nc+3] * x[4];
x[2] = b[2] - lptr[6*nc+2] * x[6] - lptr[5*nc+2] * x[5] - lptr[4*nc+2] * x[4] - lptr[3*nc+2] * x[3];
x[1] = b[1] - lptr[6*nc+1] * x[6] - lptr[5*nc+1] * x[5] - lptr[4*nc+1] * x[4] - lptr[3*nc+1] * x[3] - lptr[2*nc+1] * x[2];
x[0] = b[0] - lptr[6*nc+0] * x[6] - lptr[5*nc+0] * x[5] - lptr[4*nc+0] * x[4] - lptr[3*nc+0] * x[3] - lptr[2*nc+0] * x[2] - lptr[1*nc+0] * x[1];
return;
}
return;
}
int i, j, m;
float *xptr;
double s0;
// if the number of columns is not a multiple of 2 we're screwed for alignment.
// however, if the number of columns is a multiple of 2 but the number of to be
// processed rows is not a multiple of 2 we can still run 8 byte aligned
m = n;
if ( m & 1 ) {
m--;
x[m] = b[m];
lptr = L[m] + m - 4;
xptr = x + m;
__asm {
push ebx
mov eax, m // eax = i
mov esi, xptr // esi = xptr
mov edi, lptr // edi = lptr
mov ebx, b // ebx = b
mov edx, nc // edx = nc*sizeof(float)
shl edx, 2
process4rows_1:
cvtps2pd xmm0, [ebx+eax*4-16] // load b[i-2], b[i-1]
cvtps2pd xmm2, [ebx+eax*4-8] // load b[i-4], b[i-3]
xor ecx, ecx
sub eax, m
neg eax
jz done4x4_1
process4x4_1: // process 4x4 blocks
cvtps2pd xmm3, [edi]
cvtps2pd xmm4, [edi+8]
add edi, edx
cvtss2sd xmm5, [esi+4*ecx+0]
shufpd xmm5, xmm5, R_SHUFFLEPD( 0, 0 )
mulpd xmm3, xmm5
cvtps2pd xmm1, [edi]
mulpd xmm4, xmm5
cvtps2pd xmm6, [edi+8]
subpd xmm0, xmm3
subpd xmm2, xmm4
add edi, edx
cvtss2sd xmm7, [esi+4*ecx+4]
shufpd xmm7, xmm7, R_SHUFFLEPD( 0, 0 )
mulpd xmm1, xmm7
cvtps2pd xmm3, [edi]
mulpd xmm6, xmm7
cvtps2pd xmm4, [edi+8]
subpd xmm0, xmm1
subpd xmm2, xmm6
add edi, edx
cvtss2sd xmm5, [esi+4*ecx+8]
shufpd xmm5, xmm5, R_SHUFFLEPD( 0, 0 )
mulpd xmm3, xmm5
cvtps2pd xmm1, [edi]
mulpd xmm4, xmm5
cvtps2pd xmm6, [edi+8]
subpd xmm0, xmm3
subpd xmm2, xmm4
add edi, edx
cvtss2sd xmm7, [esi+4*ecx+12]
shufpd xmm7, xmm7, R_SHUFFLEPD( 0, 0 )
mulpd xmm1, xmm7
add ecx, 4
mulpd xmm6, xmm7
cmp ecx, eax
subpd xmm0, xmm1
subpd xmm2, xmm6
jl process4x4_1
done4x4_1: // process left over of the 4 rows
cvtps2pd xmm3, [edi]
cvtps2pd xmm4, [edi+8]
cvtss2sd xmm5, [esi+4*ecx]
shufpd xmm5, xmm5, R_SHUFFLEPD( 0, 0 )
mulpd xmm3, xmm5
mulpd xmm4, xmm5
subpd xmm0, xmm3
subpd xmm2, xmm4
imul ecx, edx
sub edi, ecx
neg eax
add eax, m
sub eax, 4
movapd xmm1, xmm0
shufpd xmm1, xmm1, R_SHUFFLEPD( 1, 1 )
movapd xmm3, xmm2
shufpd xmm3, xmm3, R_SHUFFLEPD( 1, 1 )
sub edi, edx
cvtsd2ss xmm7, xmm3
movss [esi-4], xmm7 // xptr[-1] = s3
movsd xmm4, xmm3
movsd xmm5, xmm3
cvtss2sd xmm7, [edi+8]
mulsd xmm3, xmm7 // lptr[-1*nc+2] * s3
cvtss2sd xmm7, [edi+4]
mulsd xmm4, xmm7 // lptr[-1*nc+1] * s3
cvtss2sd xmm7, [edi]
mulsd xmm5, xmm7 // lptr[-1*nc+0] * s3
subsd xmm2, xmm3
cvtsd2ss xmm7, xmm2
movss [esi-8], xmm7 // xptr[-2] = s2
movsd xmm6, xmm2
sub edi, edx
subsd xmm0, xmm5
subsd xmm1, xmm4
cvtss2sd xmm7, [edi+4]
mulsd xmm2, xmm7 // lptr[-2*nc+1] * s2
cvtss2sd xmm7, [edi]
mulsd xmm6, xmm7 // lptr[-2*nc+0] * s2
subsd xmm1, xmm2
cvtsd2ss xmm7, xmm1
movss [esi-12], xmm7 // xptr[-3] = s1
subsd xmm0, xmm6
sub edi, edx
cmp eax, 4
cvtss2sd xmm7, [edi]
mulsd xmm1, xmm7 // lptr[-3*nc+0] * s1
subsd xmm0, xmm1
cvtsd2ss xmm7, xmm0
movss [esi-16], xmm7 // xptr[-4] = s0
jl done4rows_1
sub edi, edx
sub edi, 16
sub esi, 16
jmp process4rows_1
done4rows_1:
pop ebx
}
}
else {
lptr = L.ToFloatPtr() + m * L.GetNumColumns() + m - 4;
xptr = x + m;
__asm {
push ebx
mov eax, m // eax = i
mov esi, xptr // esi = xptr
mov edi, lptr // edi = lptr
mov ebx, b // ebx = b
mov edx, nc // edx = nc*sizeof(float)
shl edx, 2
process4rows:
cvtps2pd xmm0, [ebx+eax*4-16] // load b[i-2], b[i-1]
cvtps2pd xmm2, [ebx+eax*4-8] // load b[i-4], b[i-3]
sub eax, m
jz done4x4
neg eax
xor ecx, ecx
process4x4: // process 4x4 blocks
cvtps2pd xmm3, [edi]
cvtps2pd xmm4, [edi+8]
add edi, edx
cvtss2sd xmm5, [esi+4*ecx+0]
shufpd xmm5, xmm5, R_SHUFFLEPD( 0, 0 )
mulpd xmm3, xmm5
cvtps2pd xmm1, [edi]
mulpd xmm4, xmm5
cvtps2pd xmm6, [edi+8]
subpd xmm0, xmm3
subpd xmm2, xmm4
add edi, edx
cvtss2sd xmm7, [esi+4*ecx+4]
shufpd xmm7, xmm7, R_SHUFFLEPD( 0, 0 )
mulpd xmm1, xmm7
cvtps2pd xmm3, [edi]
mulpd xmm6, xmm7
cvtps2pd xmm4, [edi+8]
subpd xmm0, xmm1
subpd xmm2, xmm6
add edi, edx
cvtss2sd xmm5, [esi+4*ecx+8]
shufpd xmm5, xmm5, R_SHUFFLEPD( 0, 0 )
mulpd xmm3, xmm5
cvtps2pd xmm1, [edi]
mulpd xmm4, xmm5
cvtps2pd xmm6, [edi+8]
subpd xmm0, xmm3
subpd xmm2, xmm4
add edi, edx
cvtss2sd xmm7, [esi+4*ecx+12]
shufpd xmm7, xmm7, R_SHUFFLEPD( 0, 0 )
mulpd xmm1, xmm7
add ecx, 4
mulpd xmm6, xmm7
cmp ecx, eax
subpd xmm0, xmm1
subpd xmm2, xmm6
jl process4x4
imul ecx, edx
sub edi, ecx
neg eax
done4x4: // process left over of the 4 rows
add eax, m
sub eax, 4
movapd xmm1, xmm0
shufpd xmm1, xmm1, R_SHUFFLEPD( 1, 1 )
movapd xmm3, xmm2
shufpd xmm3, xmm3, R_SHUFFLEPD( 1, 1 )
sub edi, edx
cvtsd2ss xmm7, xmm3
movss [esi-4], xmm7 // xptr[-1] = s3
movsd xmm4, xmm3
movsd xmm5, xmm3
cvtss2sd xmm7, [edi+8]
mulsd xmm3, xmm7 // lptr[-1*nc+2] * s3
cvtss2sd xmm7, [edi+4]
mulsd xmm4, xmm7 // lptr[-1*nc+1] * s3
cvtss2sd xmm7, [edi]
mulsd xmm5, xmm7 // lptr[-1*nc+0] * s3
subsd xmm2, xmm3
cvtsd2ss xmm7, xmm2
movss [esi-8], xmm7 // xptr[-2] = s2
movsd xmm6, xmm2
sub edi, edx
subsd xmm0, xmm5
subsd xmm1, xmm4
cvtss2sd xmm7, [edi+4]
mulsd xmm2, xmm7 // lptr[-2*nc+1] * s2
cvtss2sd xmm7, [edi]
mulsd xmm6, xmm7 // lptr[-2*nc+0] * s2
subsd xmm1, xmm2
cvtsd2ss xmm7, xmm1
movss [esi-12], xmm7 // xptr[-3] = s1
subsd xmm0, xmm6
sub edi, edx
cmp eax, 4
cvtss2sd xmm7, [edi]
mulsd xmm1, xmm7 // lptr[-3*nc+0] * s1
subsd xmm0, xmm1
cvtsd2ss xmm7, xmm0
movss [esi-16], xmm7 // xptr[-4] = s0
jl done4rows
sub edi, edx
sub edi, 16
sub esi, 16
jmp process4rows
done4rows:
pop ebx
}
}
// process left over rows
for ( i = (m&3)-1; i >= 0; i-- ) {
s0 = b[i];
lptr = L[i+1] + i;
for ( j = i + 1; j < m; j++ ) {
s0 -= lptr[0] * x[j];
lptr += nc;
}
x[i] = s0;
}
}
#endif
/*
============
idSIMD_SSE2::MixedSoundToSamples
============
*/
void VPCALL idSIMD_SSE2::MixedSoundToSamples( short *samples, const float *mixBuffer, const int numSamples ) {
assert( ( numSamples % MIXBUFFER_SAMPLES ) == 0 );
__asm {
mov eax, numSamples
mov edi, mixBuffer
mov esi, samples
shl eax, 2
add edi, eax
neg eax
loop16:
movaps xmm0, [edi+eax+0*16]
movaps xmm1, [edi+eax+1*16]
movaps xmm2, [edi+eax+2*16]
movaps xmm3, [edi+eax+3*16]
add esi, 4*4*2
cvtps2dq xmm4, xmm0
cvtps2dq xmm5, xmm1
cvtps2dq xmm6, xmm2
cvtps2dq xmm7, xmm3
prefetchnta [edi+eax+128]
packssdw xmm4, xmm5
packssdw xmm6, xmm7
add eax, 4*16
movlps [esi-4*4*2], xmm4 // FIXME: should not use movlps/movhps to move integer data
movhps [esi-3*4*2], xmm4
movlps [esi-2*4*2], xmm6
movhps [esi-1*4*2], xmm6
jl loop16
}
}
#endif /* _WIN32 */
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