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/*
* mpg123_synth_1to1 works the same way as the c version of this
* file. only two types of changes have been made:
* - reordered floating point instructions to
* prevent pipline stalls
* - made WRITE_SAMPLE use integer instead of
* (slower) floating point
* all kinds of x86 processors should benefit from these
* modifications.
*
* useful sources of information on optimizing x86 code include:
*
* Intel Architecture Optimization Manual
* http://www.intel.com/design/pentium/manuals/242816.htm
*
* Cyrix 6x86 Instruction Set Summary
* ftp://ftp.cyrix.com/6x86/6x-dbch6.pdf
*
* AMD-K5 Processor Software Development
* http://www.amd.com/products/cpg/techdocs/appnotes/20007e.pdf
*
* Stefan Bieschewski <stb@acm.org>
*
* $Id$
*/
#include "../config.h"
#include "../mangle.h"
#define real float /* ugly - but only way */
static long attribute_used buffs[1088]={0};
static long attribute_used bo=1;
static long attribute_used saved_ebp=0;
int synth_1to1_pent(real *bandPtr, int channel, short *samples)
{
real tmp[3];
register int retval;
__asm __volatile(
" movl %%ebp,"MANGLE(saved_ebp)"\n\t"
" movl %1,%%eax\n\t"/*bandPtr*/
" movl %3,%%esi\n\t"
" xorl %%edi,%%edi\n\t"
" movl "MANGLE(bo)",%%ebp\n\t"
" cmpl %%edi,%2\n\t"
" jne .L48\n\t"
" decl %%ebp\n\t"
" andl $15,%%ebp\n\t"
" movl %%ebp,"MANGLE(bo)"\n\t"
" movl $"MANGLE(buffs)",%%ecx\n\t"
" jmp .L49\n\t"
".L48:\n\t"
" addl $2,%%esi\n\t"
" movl $"MANGLE(buffs)"+2176,%%ecx\n\t"
".L49:\n\t"
" testl $1,%%ebp\n\t"
" je .L50\n\t"
" movl %%ecx,%%ebx\n\t"
" movl %%ebp,%4\n\t"
" pushl %%eax\n\t"
" movl 4+%4,%%edx\n\t"
" leal (%%ebx,%%edx,4),%%eax\n\t"
" pushl %%eax\n\t"
" movl 8+%4,%%eax\n\t"
" incl %%eax\n\t"
" andl $15,%%eax\n\t"
" leal 1088(,%%eax,4),%%eax\n\t"
" addl %%ebx,%%eax\n\t"
" jmp .L74\n\t"
".L50:\n\t"
" leal 1088(%%ecx),%%ebx\n\t"
" leal 1(%%ebp),%%edx\n\t"
" movl %%edx,%4\n\t"
" pushl %%eax\n\t"
" leal 1092(%%ecx,%%ebp,4),%%eax\n\t"
" pushl %%eax\n\t"
" leal (%%ecx,%%ebp,4),%%eax\n\t"
".L74:\n\t"
" pushl %%eax\n\t"
" call "MANGLE(dct64)"\n\t"
" addl $12,%%esp\n\t"
" movl %4,%%edx\n\t"
" leal 0(,%%edx,4),%%edx\n\t"
" movl $"MANGLE(mp3lib_decwin)"+64,%%eax\n\t"
" movl %%eax,%%ecx\n\t"
" subl %%edx,%%ecx\n\t"
" movl $16,%%ebp\n\t"
".L55:\n\t"
" flds (%%ecx)\n\t"
" fmuls (%%ebx)\n\t"
" flds 4(%%ecx)\n\t"
" fmuls 4(%%ebx)\n\t"
" fxch %%st(1)\n\t"
" flds 8(%%ecx)\n\t"
" fmuls 8(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 12(%%ecx)\n\t"
" fmuls 12(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 16(%%ecx)\n\t"
" fmuls 16(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 20(%%ecx)\n\t"
" fmuls 20(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 24(%%ecx)\n\t"
" fmuls 24(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 28(%%ecx)\n\t"
" fmuls 28(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 32(%%ecx)\n\t"
" fmuls 32(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 36(%%ecx)\n\t"
" fmuls 36(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 40(%%ecx)\n\t"
" fmuls 40(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 44(%%ecx)\n\t"
" fmuls 44(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 48(%%ecx)\n\t"
" fmuls 48(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 52(%%ecx)\n\t"
" fmuls 52(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 56(%%ecx)\n\t"
" fmuls 56(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds 60(%%ecx)\n\t"
" fmuls 60(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" subl $4,%%esp\n\t"
" faddp %%st,%%st(1)\n\t"
" fxch %%st(1)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" fistpl (%%esp)\n\t"
" popl %%eax\n\t"
" cmpl $32767,%%eax\n\t"
" jg 1f\n\t"
" cmpl $-32768,%%eax\n\t"
" jl 2f\n\t"
" movw %%ax,(%%esi)\n\t"
" jmp 4f\n\t"
"1: movw $32767,(%%esi)\n\t"
" jmp 3f\n\t"
"2: movw $-32768,(%%esi)\n\t"
"3: incl %%edi\n\t"
"4:\n\t"
".L54:\n\t"
" addl $64,%%ebx\n\t"
" subl $-128,%%ecx\n\t"
" addl $4,%%esi\n\t"
" decl %%ebp\n\t"
" jnz .L55\n\t"
" flds (%%ecx)\n\t"
" fmuls (%%ebx)\n\t"
" flds 8(%%ecx)\n\t"
" fmuls 8(%%ebx)\n\t"
" flds 16(%%ecx)\n\t"
" fmuls 16(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 24(%%ecx)\n\t"
" fmuls 24(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 32(%%ecx)\n\t"
" fmuls 32(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 40(%%ecx)\n\t"
" fmuls 40(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 48(%%ecx)\n\t"
" fmuls 48(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" faddp %%st,%%st(1)\n\t"
" flds 56(%%ecx)\n\t"
" fmuls 56(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" subl $4,%%esp\n\t"
" faddp %%st,%%st(1)\n\t"
" fxch %%st(1)\n\t"
" faddp %%st,%%st(1)\n\t"
" fistpl (%%esp)\n\t"
" popl %%eax\n\t"
" cmpl $32767,%%eax\n\t"
" jg 1f\n\t"
" cmpl $-32768,%%eax\n\t"
" jl 2f\n\t"
" movw %%ax,(%%esi)\n\t"
" jmp 4f\n\t"
"1: movw $32767,(%%esi)\n\t"
" jmp 3f\n\t"
"2: movw $-32768,(%%esi)\n\t"
"3: incl %%edi\n\t"
"4:\n\t"
".L62:\n\t"
" addl $-64,%%ebx\n\t"
" addl $4,%%esi\n\t"
" movl %4,%%edx\n\t"
" leal -128(%%ecx,%%edx,8),%%ecx\n\t"
" movl $15,%%ebp\n\t"
".L68:\n\t"
" flds -4(%%ecx)\n\t"
" fchs\n\t"
" fmuls (%%ebx)\n\t"
" flds -8(%%ecx)\n\t"
" fmuls 4(%%ebx)\n\t"
" fxch %%st(1)\n\t"
" flds -12(%%ecx)\n\t"
" fmuls 8(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -16(%%ecx)\n\t"
" fmuls 12(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -20(%%ecx)\n\t"
" fmuls 16(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -24(%%ecx)\n\t"
" fmuls 20(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -28(%%ecx)\n\t"
" fmuls 24(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -32(%%ecx)\n\t"
" fmuls 28(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -36(%%ecx)\n\t"
" fmuls 32(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -40(%%ecx)\n\t"
" fmuls 36(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -44(%%ecx)\n\t"
" fmuls 40(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -48(%%ecx)\n\t"
" fmuls 44(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -52(%%ecx)\n\t"
" fmuls 48(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -56(%%ecx)\n\t"
" fmuls 52(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds -60(%%ecx)\n\t"
" fmuls 56(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" flds (%%ecx)\n\t"
" fmuls 60(%%ebx)\n\t"
" fxch %%st(2)\n\t"
" subl $4,%%esp\n\t"
" fsubrp %%st,%%st(1)\n\t"
" fxch %%st(1)\n\t"
" fsubrp %%st,%%st(1)\n\t"
" fistpl (%%esp)\n\t"
" popl %%eax\n\t"
" cmpl $32767,%%eax\n\t"
" jg 1f\n\t"
" cmpl $-32768,%%eax\n\t"
" jl 2f\n\t"
" movw %%ax,(%%esi)\n\t"
" jmp 4f\n\t"
"1: movw $32767,(%%esi)\n\t"
" jmp 3f\n\t"
"2: movw $-32768,(%%esi)\n\t"
"3: incl %%edi\n\t"
"4:\n\t"
".L67:\n\t"
" addl $-64,%%ebx\n\t"
" addl $-128,%%ecx\n\t"
" addl $4,%%esi\n\t"
" decl %%ebp\n\t"
" jnz .L68\n\t"
" movl %%edi,%%eax\n\t"
" movl "MANGLE(saved_ebp)",%%ebp\n\t"
:"=a"(retval)
:"m"(bandPtr),"m"(channel),"m"(samples),"m"(tmp[0])
:"memory","%edi","%esi","%ebx");
return retval;
}
|
