/*
dct64_i386.c: DCT64, a C variant for i386
copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
see COPYING and AUTHORS files in distribution or http://mpg123.org
initially written by Michael Hipp
*/
/*
* Discrete Cosine Tansform (DCT) for subband synthesis
* optimized for machines with no auto-increment.
* The performance is highly compiler dependend. Maybe
* the dct64.c version for 'normal' processor may be faster
* even for Intel processors.
*/
#include "mpg123lib_intern.h"
static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples)
{
{
register real *costab = pnts[0];
b1[0x00] = samples[0x00] + samples[0x1F];
b1[0x01] = samples[0x01] + samples[0x1E];
b1[0x1F] = REAL_MUL(samples[0x00] - samples[0x1F], costab[0x0]);
b1[0x1E] = REAL_MUL(samples[0x01] - samples[0x1E], costab[0x1]);
b1[0x02] = samples[0x02] + samples[0x1D];
b1[0x03] = samples[0x03] + samples[0x1C];
b1[0x1D] = REAL_MUL(samples[0x02] - samples[0x1D], costab[0x2]);
b1[0x1C] = REAL_MUL(samples[0x03] - samples[0x1C], costab[0x3]);
b1[0x04] = samples[0x04] + samples[0x1B];
b1[0x05] = samples[0x05] + samples[0x1A];
b1[0x1B] = REAL_MUL(samples[0x04] - samples[0x1B], costab[0x4]);
b1[0x1A] = REAL_MUL(samples[0x05] - samples[0x1A], costab[0x5]);
b1[0x06] = samples[0x06] + samples[0x19];
b1[0x07] = samples[0x07] + samples[0x18];
b1[0x19] = REAL_MUL(samples[0x06] - samples[0x19], costab[0x6]);
b1[0x18] = REAL_MUL(samples[0x07] - samples[0x18], costab[0x7]);
b1[0x08] = samples[0x08] + samples[0x17];
b1[0x09] = samples[0x09] + samples[0x16];
b1[0x17] = REAL_MUL(samples[0x08] - samples[0x17], costab[0x8]);
b1[0x16] = REAL_MUL(samples[0x09] - samples[0x16], costab[0x9]);
b1[0x0A] = samples[0x0A] + samples[0x15];
b1[0x0B] = samples[0x0B] + samples[0x14];
b1[0x15] = REAL_MUL(samples[0x0A] - samples[0x15], costab[0xA]);
b1[0x14] = REAL_MUL(samples[0x0B] - samples[0x14], costab[0xB]);
b1[0x0C] = samples[0x0C] + samples[0x13];
b1[0x0D] = samples[0x0D] + samples[0x12];
b1[0x13] = REAL_MUL(samples[0x0C] - samples[0x13], costab[0xC]);
b1[0x12] = REAL_MUL(samples[0x0D] - samples[0x12], costab[0xD]);
b1[0x0E] = samples[0x0E] + samples[0x11];
b1[0x0F] = samples[0x0F] + samples[0x10];
b1[0x11] = REAL_MUL(samples[0x0E] - samples[0x11], costab[0xE]);
b1[0x10] = REAL_MUL(samples[0x0F] - samples[0x10], costab[0xF]);
}
{
register real *costab = pnts[1];
b2[0x00] = b1[0x00] + b1[0x0F];
b2[0x01] = b1[0x01] + b1[0x0E];
b2[0x0F] = REAL_MUL(b1[0x00] - b1[0x0F], costab[0]);
b2[0x0E] = REAL_MUL(b1[0x01] - b1[0x0E], costab[1]);
b2[0x02] = b1[0x02] + b1[0x0D];
b2[0x03] = b1[0x03] + b1[0x0C];
b2[0x0D] = REAL_MUL(b1[0x02] - b1[0x0D], costab[2]);
b2[0x0C] = REAL_MUL(b1[0x03] - b1[0x0C], costab[3]);
b2[0x04] = b1[0x04] + b1[0x0B];
b2[0x05] = b1[0x05] + b1[0x0A];
b2[0x0B] = REAL_MUL(b1[0x04] - b1[0x0B], costab[4]);
b2[0x0A] = REAL_MUL(b1[0x05] - b1[0x0A], costab[5]);
b2[0x06] = b1[0x06] + b1[0x09];
b2[0x07] = b1[0x07] + b1[0x08];
b2[0x09] = REAL_MUL(b1[0x06] - b1[0x09], costab[6]);
b2[0x08] = REAL_MUL(b1[0x07] - b1[0x08], costab[7]);
/* */
b2[0x10] = b1[0x10] + b1[0x1F];
b2[0x11] = b1[0x11] + b1[0x1E];
b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x10], costab[0]);
b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x11], costab[1]);
b2[0x12] = b1[0x12] + b1[0x1D];
b2[0x13] = b1[0x13] + b1[0x1C];
b2[0x1D] = REAL_MUL(b1[0x1D] - b1[0x12], costab[2]);
b2[0x1C] = REAL_MUL(b1[0x1C] - b1[0x13], costab[3]);
b2[0x14] = b1[0x14] + b1[0x1B];
b2[0x15] = b1[0x15] + b1[0x1A];
b2[0x1B] = REAL_MUL(b1[0x1B] - b1[0x14], costab[4]);
b2[0x1A] = REAL_MUL(b1[0x1A] - b1[0x15], costab[5]);
b2[0x16] = b1[0x16] + b1[0x19];
b2[0x17] = b1[0x17] + b1[0x18];
b2[0x19] = REAL_MUL(b1[0x19] - b1[0x16], costab[6]);
b2[0x18] = REAL_MUL(b1[0x18] - b1[0x17], costab[7]);
}
{
register real *costab = pnts[2];
b1[0x00] = b2[0x00] + b2[0x07];
b1[0x07] = REAL_MUL(b2[0x00] - b2[0x07], costab[0]);
b1[0x01] = b2[0x01] + b2[0x06];
b1[0x06] = REAL_MUL(b2[0x01] - b2[0x06], costab[1]);
b1[0x02] = b2[0x02] + b2[0x05];
b1[0x05] = REAL_MUL(b2[0x02] - b2[0x05], costab[2]);
b1[0x03] = b2[0x03] + b2[0x04];
b1[0x04] = REAL_MUL(b2[0x03] - b2[0x04], costab[3]);
b1[0x08] = b2[0x08] + b2[0x0F];
b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x08], costab[0]);
b1[0x09] = b2[0x09] + b2[0x0E];
b1[0x0E] = REAL_MUL(b2[0x0E] - b2[0x09], costab[1]);
b1[0x0A] = b2[0x0A] + b2[0x0D];
b1[0x0D] = REAL_MUL(b2[0x0D] - b2[0x0A], costab[2]);
b1[0x0B] = b2[0x0B] + b2[0x0C];
b1[0x0C] = REAL_MUL(b2[0x0C] - b2[0x0B], costab[3]);
b1[0x10] = b2[0x10] + b2[0x17];
b1[0x17] = REAL_MUL(b2[0x10] - b2[0x17], costab[0]);
b1[0x11] = b2[0x11] + b2[0x16];
b1[0x16] = REAL_MUL(b2[0x11] - b2[0x16], costab[1]);
b1[0x12] = b2[0x12] + b2[0x15];
b1[0x15] = REAL_MUL(b2[0x12] - b2[0x15], costab[2]);
b1[0x13] = b2[0x13] + b2[0x14];
b1[0x14] = REAL_MUL(b2[0x13] - b2[0x14], costab[3]);
b1[0x18] = b2[0x18] + b2[0x1F];
b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x18], costab[0]);
b1[0x19] = b2[0x19] + b2[0x1E];
b1[0x1E] = REAL_MUL(b2[0x1E] - b2[0x19], costab[1]);
b1[0x1A] = b2[0x1A] + b2[0x1D];
b1[0x1D] = REAL_MUL(b2[0x1D] - b2[0x1A], costab[2]);
b1[0x1B] = b2[0x1B] + b2[0x1C];
b1[0x1C] = REAL_MUL(b2[0x1C] - b2[0x1B], costab[3]);
}
{
register real const cos0 = pnts[3][0];
register real const cos1 = pnts[3][1];
b2[0x00] = b1[0x00] + b1[0x03];
b2[0x03] = REAL_MUL(b1[0x00] - b1[0x03], cos0);
b2[0x01] = b1[0x01] + b1[0x02];
b2[0x02] = REAL_MUL(b1[0x01] - b1[0x02], cos1);
b2[0x04] = b1[0x04] + b1[0x07];
b2[0x07] = REAL_MUL(b1[0x07] - b1[0x04], cos0);
b2[0x05] = b1[0x05] + b1[0x06];
b2[0x06] = REAL_MUL(b1[0x06] - b1[0x05], cos1);
b2[0x08] = b1[0x08] + b1[0x0B];
b2[0x0B] = REAL_MUL(b1[0x08] - b1[0x0B], cos0);
b2[0x09] = b1[0x09] + b1[0x0A];
b2[0x0A] = REAL_MUL(b1[0x09] - b1[0x0A], cos1);
b2[0x0C] = b1[0x0C] + b1[0x0F];
b2[0x0F] = REAL_MUL(b1[0x0F] - b1[0x0C], cos0);
b2[0x0D] = b1[0x0D] + b1[0x0E];
b2[0x0E] = REAL_MUL(b1[0x0E] - b1[0x0D], cos1);
b2[0x10] = b1[0x10] + b1[0x13];
b2[0x13] = REAL_MUL(b1[0x10] - b1[0x13], cos0);
b2[0x11] = b1[0x11] + b1[0x12];
b2[0x12] = REAL_MUL(b1[0x11] - b1[0x12], cos1);
b2[0x14] = b1[0x14] + b1[0x17];
b2[0x17] = REAL_MUL(b1[0x17] - b1[0x14], cos0);
b2[0x15] = b1[0x15] + b1[0x16];
b2[0x16] = REAL_MUL(b1[0x16] - b1[0x15], cos1);
b2[0x18] = b1[0x18] + b1[0x1B];
b2[0x1B] = REAL_MUL(b1[0x18] - b1[0x1B], cos0);
b2[0x19] = b1[0x19] + b1[0x1A];
b2[0x1A] = REAL_MUL(b1[0x19] - b1[0x1A], cos1);
b2[0x1C] = b1[0x1C] + b1[0x1F];
b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x1C], cos0);
b2[0x1D] = b1[0x1D] + b1[0x1E];
b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x1D], cos1);
}
{
register real const cos0 = pnts[4][0];
b1[0x00] = b2[0x00] + b2[0x01];
b1[0x01] = REAL_MUL(b2[0x00] - b2[0x01], cos0);
b1[0x02] = b2[0x02] + b2[0x03];
b1[0x03] = REAL_MUL(b2[0x03] - b2[0x02], cos0);
b1[0x02] += b1[0x03];
b1[0x04] = b2[0x04] + b2[0x05];
b1[0x05] = REAL_MUL(b2[0x04] - b2[0x05], cos0);
b1[0x06] = b2[0x06] + b2[0x07];
b1[0x07] = REAL_MUL(b2[0x07] - b2[0x06], cos0);
b1[0x06] += b1[0x07];
b1[0x04] += b1[0x06];
b1[0x06] += b1[0x05];
b1[0x05] += b1[0x07];
b1[0x08] = b2[0x08] + b2[0x09];
b1[0x09] = REAL_MUL(b2[0x08] - b2[0x09], cos0);
b1[0x0A] = b2[0x0A] + b2[0x0B];
b1[0x0B] = REAL_MUL(b2[0x0B] - b2[0x0A], cos0);
b1[0x0A] += b1[0x0B];
b1[0x0C] = b2[0x0C] + b2[0x0D];
b1[0x0D] = REAL_MUL(b2[0x0C] - b2[0x0D], cos0);
b1[0x0E] = b2[0x0E] + b2[0x0F];
b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x0E], cos0);
b1[0x0E] += b1[0x0F];
b1[0x0C] += b1[0x0E];
b1[0x0E] += b1[0x0D];
b1[0x0D] += b1[0x0F];
b1[0x10] = b2[0x10] + b2[0x11];
b1[0x11] = REAL_MUL(b2[0x10] - b2[0x11], cos0);
b1[0x12] = b2[0x12] + b2[0x13];
b1[0x13] = REAL_MUL(b2[0x13] - b2[0x12], cos0);
b1[0x12] += b1[0x13];
b1[0x14] = b2[0x14] + b2[0x15];
b1[0x15] = REAL_MUL(b2[0x14] - b2[0x15], cos0);
b1[0x16] = b2[0x16] + b2[0x17];
b1[0x17] = REAL_MUL(b2[0x17] - b2[0x16], cos0);
b1[0x16] += b1[0x17];
b1[0x14] += b1[0x16];
b1[0x16] += b1[0x15];
b1[0x15] += b1[0x17];
b1[0x18] = b2[0x18] + b2[0x19];
b1[0x19] = REAL_MUL(b2[0x18] - b2[0x19], cos0);
b1[0x1A] = b2[0x1A] + b2[0x1B];
b1[0x1B] = REAL_MUL(b2[0x1B] - b2[0x1A], cos0);
b1[0x1A] += b1[0x1B];
b1[0x1C] = b2[0x1C] + b2[0x1D];
b1[0x1D] = REAL_MUL(b2[0x1C] - b2[0x1D], cos0);
b1[0x1E] = b2[0x1E] + b2[0x1F];
b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x1E], cos0);
b1[0x1E] += b1[0x1F];
b1[0x1C] += b1[0x1E];
b1[0x1E] += b1[0x1D];
b1[0x1D] += b1[0x1F];
}
out0[0x10*16] = REAL_SCALE_DCT64(b1[0x00]);
out0[0x10*12] = REAL_SCALE_DCT64(b1[0x04]);
out0[0x10* 8] = REAL_SCALE_DCT64(b1[0x02]);
out0[0x10* 4] = REAL_SCALE_DCT64(b1[0x06]);
out0[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]);
out1[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]);
out1[0x10* 4] = REAL_SCALE_DCT64(b1[0x05]);
out1[0x10* 8] = REAL_SCALE_DCT64(b1[0x03]);
out1[0x10*12] = REAL_SCALE_DCT64(b1[0x07]);
#if 1
out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08] + b1[0x0C]);
out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C] + b1[0x0a]);
out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A] + b1[0x0E]);
out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E] + b1[0x09]);
out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09] + b1[0x0D]);
out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D] + b1[0x0B]);
out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B] + b1[0x0F]);
out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]);
#else
b1[0x08] += b1[0x0C];
out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08]);
b1[0x0C] += b1[0x0a];
out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C]);
b1[0x0A] += b1[0x0E];
out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A]);
b1[0x0E] += b1[0x09];
out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E]);
b1[0x09] += b1[0x0D];
out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09]);
b1[0x0D] += b1[0x0B];
out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D]);
b1[0x0B] += b1[0x0F];
out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B]);
out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]);
#endif
{
real tmp;
tmp = b1[0x18] + b1[0x1C];
out0[0x10*15] = REAL_SCALE_DCT64(tmp + b1[0x10]);
out0[0x10*13] = REAL_SCALE_DCT64(tmp + b1[0x14]);
tmp = b1[0x1C] + b1[0x1A];
out0[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x14]);
out0[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x12]);
tmp = b1[0x1A] + b1[0x1E];
out0[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x12]);
out0[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x16]);
tmp = b1[0x1E] + b1[0x19];
out0[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x16]);
out0[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]);
tmp = b1[0x19] + b1[0x1D];
out1[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]);
out1[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x15]);
tmp = b1[0x1D] + b1[0x1B];
out1[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x15]);
out1[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x13]);
tmp = b1[0x1B] + b1[0x1F];
out1[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x13]);
out1[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x17]);
out1[0x10*13] = REAL_SCALE_DCT64(b1[0x17] + b1[0x1F]);
out1[0x10*15] = REAL_SCALE_DCT64(b1[0x1F]);
}
}
/*
* the call via dct64 is a trick to force GCC to use
* (new) registers for the b1,b2 pointer to the bufs[xx] field
*/
void dct64_i386(real *a,real *b,real *c)
{
real bufs[0x40];
dct64_1(a,b,bufs,bufs+0x20,c);
}