forked from KolibriOS/kolibrios
337 lines
5.9 KiB
ArmAsm
337 lines
5.9 KiB
ArmAsm
|
/*
|
||
|
|
decode_i586: asm synth
|
||
|
|
|
||
|
|
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 Stefan Bieschewski
|
||
|
|
|
||
|
|
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: decode_i586.s 1 2004-09-18 13:30:08Z thomas $
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mangle.h"
|
||
|
|
|
||
|
|
.data
|
||
|
|
#ifndef __APPLE__
|
||
|
|
.section .rodata
|
||
|
|
#endif
|
||
|
|
ALIGN8
|
||
|
|
.LC0:
|
||
|
|
.long 0x0,0x40dfffc0
|
||
|
|
ALIGN8
|
||
|
|
.LC1:
|
||
|
|
.long 0x0,0xc0e00000
|
||
|
|
ALIGN8
|
||
|
|
.text
|
||
|
|
/* int synth_1to1_i586_asm(real *bandPtr, int channel, unsigned char *out, unsigned char *buffs, int *bo, real *decwin); */
|
||
|
|
.globl ASM_NAME(synth_1to1_i586_asm)
|
||
|
|
ASM_NAME(synth_1to1_i586_asm):
|
||
|
|
subl $12,%esp
|
||
|
|
pushl %ebp
|
||
|
|
pushl %edi
|
||
|
|
pushl %esi
|
||
|
|
pushl %ebx
|
||
|
|
/* stack: 0=ebx, 4=esi, 8=edi, 12=ebp, 16,20,24=local, 28=back, 32=bandPtr, 36=channel, 40=out, 44=buffs, 48=bo, 52=decwin */
|
||
|
|
movl 32(%esp),%eax /* *bandPtr */
|
||
|
|
movl 40(%esp),%esi /* *out */
|
||
|
|
movl 48(%esp),%edi /* *bo */
|
||
|
|
movl (%edi),%ebp /* store bo value in ebp */
|
||
|
|
xorl %edi,%edi
|
||
|
|
cmpl %edi,36(%esp)
|
||
|
|
jne .L48 /* if(!channel) */
|
||
|
|
decl %ebp /* bo-- */
|
||
|
|
andl $15,%ebp /* bo &= 0xf */
|
||
|
|
movl 48(%esp), %edi /* *bo */
|
||
|
|
movl %ebp,(%edi) /* write back bo */
|
||
|
|
xorl %edi,%edi /* restore %edi to 0; it's used later */
|
||
|
|
movl 44(%esp),%ecx /* use buffs */
|
||
|
|
jmp .L49
|
||
|
|
.L48: /* if(channel) use buffs+2176 */
|
||
|
|
addl $2,%esi
|
||
|
|
movl 44(%esp),%ecx /* *buffs */
|
||
|
|
addl $2176,%ecx
|
||
|
|
.L49:
|
||
|
|
testl $1,%ebp
|
||
|
|
je .L50
|
||
|
|
movl %ecx,%ebx
|
||
|
|
movl %ebp,16(%esp)
|
||
|
|
pushl %eax
|
||
|
|
movl 20(%esp),%edx
|
||
|
|
leal (%ebx,%edx,4),%eax
|
||
|
|
pushl %eax
|
||
|
|
movl 24(%esp),%eax
|
||
|
|
incl %eax
|
||
|
|
andl $15,%eax
|
||
|
|
leal 1088(,%eax,4),%eax
|
||
|
|
addl %ebx,%eax
|
||
|
|
jmp .L74
|
||
|
|
.L50:
|
||
|
|
leal 1088(%ecx),%ebx
|
||
|
|
leal 1(%ebp),%edx
|
||
|
|
movl %edx,16(%esp)
|
||
|
|
pushl %eax
|
||
|
|
leal 1092(%ecx,%ebp,4),%eax
|
||
|
|
pushl %eax
|
||
|
|
leal (%ecx,%ebp,4),%eax
|
||
|
|
.L74:
|
||
|
|
pushl %eax
|
||
|
|
call ASM_NAME(dct64_i386)
|
||
|
|
addl $12,%esp
|
||
|
|
/* stack now back on track */
|
||
|
|
movl 16(%esp),%edx
|
||
|
|
leal 0(,%edx,4),%edx
|
||
|
|
movl 52(%esp),%eax /* decwin */
|
||
|
|
addl $64,%eax
|
||
|
|
movl %eax,%ecx
|
||
|
|
subl %edx,%ecx
|
||
|
|
movl $16,%ebp
|
||
|
|
.L55:
|
||
|
|
flds (%ecx)
|
||
|
|
fmuls (%ebx)
|
||
|
|
flds 4(%ecx)
|
||
|
|
fmuls 4(%ebx)
|
||
|
|
fxch %st(1)
|
||
|
|
flds 8(%ecx)
|
||
|
|
fmuls 8(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 12(%ecx)
|
||
|
|
fmuls 12(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 16(%ecx)
|
||
|
|
fmuls 16(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 20(%ecx)
|
||
|
|
fmuls 20(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 24(%ecx)
|
||
|
|
fmuls 24(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 28(%ecx)
|
||
|
|
fmuls 28(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 32(%ecx)
|
||
|
|
fmuls 32(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 36(%ecx)
|
||
|
|
fmuls 36(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 40(%ecx)
|
||
|
|
fmuls 40(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 44(%ecx)
|
||
|
|
fmuls 44(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 48(%ecx)
|
||
|
|
fmuls 48(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 52(%ecx)
|
||
|
|
fmuls 52(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 56(%ecx)
|
||
|
|
fmuls 56(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds 60(%ecx)
|
||
|
|
fmuls 60(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
subl $4,%esp
|
||
|
|
faddp %st,%st(1)
|
||
|
|
fxch %st(1)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
fistpl (%esp)
|
||
|
|
popl %eax
|
||
|
|
cmpl $32767,%eax
|
||
|
|
jg 1f
|
||
|
|
cmpl $-32768,%eax
|
||
|
|
jl 2f
|
||
|
|
movw %ax,(%esi)
|
||
|
|
jmp 4f
|
||
|
|
1: movw $32767,(%esi)
|
||
|
|
jmp 3f
|
||
|
|
2: movw $-32768,(%esi)
|
||
|
|
3: incl %edi
|
||
|
|
4:
|
||
|
|
.L54:
|
||
|
|
addl $64,%ebx
|
||
|
|
subl $-128,%ecx
|
||
|
|
addl $4,%esi
|
||
|
|
decl %ebp
|
||
|
|
jnz .L55
|
||
|
|
flds (%ecx)
|
||
|
|
fmuls (%ebx)
|
||
|
|
flds 8(%ecx)
|
||
|
|
fmuls 8(%ebx)
|
||
|
|
flds 16(%ecx)
|
||
|
|
fmuls 16(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 24(%ecx)
|
||
|
|
fmuls 24(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 32(%ecx)
|
||
|
|
fmuls 32(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 40(%ecx)
|
||
|
|
fmuls 40(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 48(%ecx)
|
||
|
|
fmuls 48(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
flds 56(%ecx)
|
||
|
|
fmuls 56(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
subl $4,%esp
|
||
|
|
faddp %st,%st(1)
|
||
|
|
fxch %st(1)
|
||
|
|
faddp %st,%st(1)
|
||
|
|
fistpl (%esp)
|
||
|
|
popl %eax
|
||
|
|
cmpl $32767,%eax
|
||
|
|
jg 1f
|
||
|
|
cmpl $-32768,%eax
|
||
|
|
jl 2f
|
||
|
|
movw %ax,(%esi)
|
||
|
|
jmp 4f
|
||
|
|
1: movw $32767,(%esi)
|
||
|
|
jmp 3f
|
||
|
|
2: movw $-32768,(%esi)
|
||
|
|
3: incl %edi
|
||
|
|
4:
|
||
|
|
.L62:
|
||
|
|
addl $-64,%ebx
|
||
|
|
addl $4,%esi
|
||
|
|
movl 16(%esp),%edx
|
||
|
|
leal -128(%ecx,%edx,8),%ecx
|
||
|
|
movl $15,%ebp
|
||
|
|
.L68:
|
||
|
|
flds -4(%ecx)
|
||
|
|
fchs
|
||
|
|
fmuls (%ebx)
|
||
|
|
flds -8(%ecx)
|
||
|
|
fmuls 4(%ebx)
|
||
|
|
fxch %st(1)
|
||
|
|
flds -12(%ecx)
|
||
|
|
fmuls 8(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -16(%ecx)
|
||
|
|
fmuls 12(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -20(%ecx)
|
||
|
|
fmuls 16(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -24(%ecx)
|
||
|
|
fmuls 20(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -28(%ecx)
|
||
|
|
fmuls 24(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -32(%ecx)
|
||
|
|
fmuls 28(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -36(%ecx)
|
||
|
|
fmuls 32(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -40(%ecx)
|
||
|
|
fmuls 36(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -44(%ecx)
|
||
|
|
fmuls 40(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -48(%ecx)
|
||
|
|
fmuls 44(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -52(%ecx)
|
||
|
|
fmuls 48(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -56(%ecx)
|
||
|
|
fmuls 52(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds -60(%ecx)
|
||
|
|
fmuls 56(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
flds (%ecx)
|
||
|
|
fmuls 60(%ebx)
|
||
|
|
fxch %st(2)
|
||
|
|
subl $4,%esp
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
fxch %st(1)
|
||
|
|
fsubrp %st,%st(1)
|
||
|
|
fistpl (%esp)
|
||
|
|
popl %eax
|
||
|
|
cmpl $32767,%eax
|
||
|
|
jg 1f
|
||
|
|
cmpl $-32768,%eax
|
||
|
|
jl 2f
|
||
|
|
movw %ax,(%esi)
|
||
|
|
jmp 4f
|
||
|
|
1: movw $32767,(%esi)
|
||
|
|
jmp 3f
|
||
|
|
2: movw $-32768,(%esi)
|
||
|
|
3: incl %edi
|
||
|
|
4:
|
||
|
|
.L67:
|
||
|
|
addl $-64,%ebx
|
||
|
|
addl $-128,%ecx
|
||
|
|
addl $4,%esi
|
||
|
|
decl %ebp
|
||
|
|
jnz .L68
|
||
|
|
movl %edi,%eax
|
||
|
|
popl %ebx
|
||
|
|
popl %esi
|
||
|
|
popl %edi
|
||
|
|
popl %ebp
|
||
|
|
addl $12,%esp
|
||
|
|
ret
|
||
|
|
|
||
|
|
NONEXEC_STACK
|