130 lines
3.3 KiB
ArmAsm
130 lines
3.3 KiB
ArmAsm
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/*
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decode_MMX.s: MMX optimized synth
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copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by the mysterious higway (apparently)
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Thomas' words about a note:
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Initially, I found the note "this code comes under GPL" in this file.
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After asking Michael about legal status of the MMX files, he said that he got them without any comment and thus I believe that the GPL comment was made by Michael, since he made mpg123 GPL at some time - and marked some files that way, but not all.
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Based on that thought, I now consider this file along with the other parts of higway's MMX optimization to be licensed under LGPL 2.1 by Michael's decision.
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*/
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#include "mangle.h"
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.text
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.globl ASM_NAME(synth_1to1_MMX)
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/* int synth_1to1_MMX(real *bandPtr, int channel, short *out, short *buffs, int *bo, float *decwins); */
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ASM_NAME(synth_1to1_MMX):
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pushl %ebp
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pushl %edi
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pushl %esi
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pushl %ebx
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/* stack: 0=ebx, 4=esi, 8=edi, 12=ebp, 16=back, 20=bandPtr, 24=channel, 28=out, 32=buffs, 36=bo, 40=decwins */
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movl 24(%esp),%ecx
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movl 28(%esp),%edi
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movl $15,%ebx
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movl 36(%esp),%edx
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leal (%edi,%ecx,2),%edi
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decl %ecx
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movl 32(%esp),%esi
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movl (%edx),%eax
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jecxz .L1
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decl %eax
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andl %ebx,%eax
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leal 1088(%esi),%esi
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movl %eax,(%edx)
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.L1:
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leal (%esi,%eax,2),%edx
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movl %eax,%ebp
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incl %eax
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pushl 20(%esp)
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andl %ebx,%eax
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leal 544(%esi,%eax,2),%ecx
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incl %ebx
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testl $1, %eax
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jnz .L2
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xchgl %edx,%ecx
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incl %ebp
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leal 544(%esi),%esi
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.L2:
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pushl %edx
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pushl %ecx
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call ASM_NAME(dct64_MMX)
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addl $12,%esp
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/* stack like before, pushed 3, incremented again */
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leal 1(%ebx), %ecx
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subl %ebp,%ebx
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pushl %eax
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movl 44(%esp),%eax /* decwins */
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leal (%eax,%ebx,2), %edx
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popl %eax
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.L3:
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movq (%edx),%mm0
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pmaddwd (%esi),%mm0
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movq 8(%edx),%mm1
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pmaddwd 8(%esi),%mm1
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movq 16(%edx),%mm2
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pmaddwd 16(%esi),%mm2
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movq 24(%edx),%mm3
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pmaddwd 24(%esi),%mm3
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paddd %mm1,%mm0
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paddd %mm2,%mm0
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paddd %mm3,%mm0
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movq %mm0,%mm1
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psrlq $32,%mm1
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paddd %mm1,%mm0
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psrad $13,%mm0
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packssdw %mm0,%mm0
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movd %mm0,%eax
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movw %ax, (%edi)
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leal 32(%esi),%esi
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leal 64(%edx),%edx
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leal 4(%edi),%edi
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loop .L3
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subl $64,%esi
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movl $15,%ecx
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.L4:
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movq (%edx),%mm0
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pmaddwd (%esi),%mm0
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movq 8(%edx),%mm1
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pmaddwd 8(%esi),%mm1
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movq 16(%edx),%mm2
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pmaddwd 16(%esi),%mm2
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movq 24(%edx),%mm3
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pmaddwd 24(%esi),%mm3
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paddd %mm1,%mm0
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paddd %mm2,%mm0
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paddd %mm3,%mm0
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movq %mm0,%mm1
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psrlq $32,%mm1
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paddd %mm0,%mm1
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psrad $13,%mm1
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packssdw %mm1,%mm1
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psubd %mm0,%mm0
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psubsw %mm1,%mm0
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movd %mm0,%eax
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movw %ax,(%edi)
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subl $32,%esi
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addl $64,%edx
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leal 4(%edi),%edi
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loop .L4
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emms
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popl %ebx
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popl %esi
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popl %edi
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popl %ebp
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ret
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/* Mark non-executable stack. */
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#if defined(__linux__) && defined(__ELF__)
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.section .note.GNU-stack,"",%progbits
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#endif
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