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comparison decoders/libmpg123/decode_mmx.S @ 562:7e08477b0fc1

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MP3 decoder upgrade work. Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123. libmpg123 is a much better version of mpglib, so it should solve all the problems about MP3's not seeking, or most modern MP3's not playing at all, etc. Since you no longer have to make a tradeoff with SMPEG for features, and SMPEG is basically rotting, I removed it from the project. There is still work to be done with libmpg123...there are MMX, 3DNow, SSE, Altivec, etc decoders which we don't have enabled at the moment, and the build system could use some work to make this compile more cleanly, etc. Still: huge win.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 30 Jan 2009 02:44:47 -0500
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561:f2985e08589c 562:7e08477b0fc1
1 /*
2 decode_MMX.s: MMX optimized synth
3
4 copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
5 see COPYING and AUTHORS files in distribution or http://mpg123.org
6 initially written by the mysterious higway (apparently)
7
8 Thomas' words about a note:
9 Initially, I found the note "this code comes under GPL" in this file.
10 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.
11 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.
12 */
13
14 #include "mangle.h"
15
16 .text
17
18 .globl ASM_NAME(synth_1to1_MMX)
19 /* int synth_1to1_MMX(real *bandPtr, int channel, short *out, short *buffs, int *bo, float *decwins); */
20 ASM_NAME(synth_1to1_MMX):
21 pushl %ebp
22 pushl %edi
23 pushl %esi
24 pushl %ebx
25 /* stack: 0=ebx, 4=esi, 8=edi, 12=ebp, 16=back, 20=bandPtr, 24=channel, 28=out, 32=buffs, 36=bo, 40=decwins */
26 movl 24(%esp),%ecx
27 movl 28(%esp),%edi
28 movl $15,%ebx
29 movl 36(%esp),%edx
30 leal (%edi,%ecx,2),%edi
31 decl %ecx
32 movl 32(%esp),%esi
33 movl (%edx),%eax
34 jecxz .L1
35 decl %eax
36 andl %ebx,%eax
37 leal 1088(%esi),%esi
38 movl %eax,(%edx)
39 .L1:
40 leal (%esi,%eax,2),%edx
41 movl %eax,%ebp
42 incl %eax
43 pushl 20(%esp)
44 andl %ebx,%eax
45 leal 544(%esi,%eax,2),%ecx
46 incl %ebx
47 testl $1, %eax
48 jnz .L2
49 xchgl %edx,%ecx
50 incl %ebp
51 leal 544(%esi),%esi
52 .L2:
53 pushl %edx
54 pushl %ecx
55 call ASM_NAME(dct64_MMX)
56 addl $12,%esp
57 /* stack like before, pushed 3, incremented again */
58 leal 1(%ebx), %ecx
59 subl %ebp,%ebx
60 pushl %eax
61 movl 44(%esp),%eax /* decwins */
62 leal (%eax,%ebx,2), %edx
63 popl %eax
64 .L3:
65 movq (%edx),%mm0
66 pmaddwd (%esi),%mm0
67 movq 8(%edx),%mm1
68 pmaddwd 8(%esi),%mm1
69 movq 16(%edx),%mm2
70 pmaddwd 16(%esi),%mm2
71 movq 24(%edx),%mm3
72 pmaddwd 24(%esi),%mm3
73 paddd %mm1,%mm0
74 paddd %mm2,%mm0
75 paddd %mm3,%mm0
76 movq %mm0,%mm1
77 psrlq $32,%mm1
78 paddd %mm1,%mm0
79 psrad $13,%mm0
80 packssdw %mm0,%mm0
81 movd %mm0,%eax
82 movw %ax, (%edi)
83
84 leal 32(%esi),%esi
85 leal 64(%edx),%edx
86 leal 4(%edi),%edi
87 loop .L3
88
89
90 subl $64,%esi
91 movl $15,%ecx
92 .L4:
93 movq (%edx),%mm0
94 pmaddwd (%esi),%mm0
95 movq 8(%edx),%mm1
96 pmaddwd 8(%esi),%mm1
97 movq 16(%edx),%mm2
98 pmaddwd 16(%esi),%mm2
99 movq 24(%edx),%mm3
100 pmaddwd 24(%esi),%mm3
101 paddd %mm1,%mm0
102 paddd %mm2,%mm0
103 paddd %mm3,%mm0
104 movq %mm0,%mm1
105 psrlq $32,%mm1
106 paddd %mm0,%mm1
107 psrad $13,%mm1
108 packssdw %mm1,%mm1
109 psubd %mm0,%mm0
110 psubsw %mm1,%mm0
111 movd %mm0,%eax
112 movw %ax,(%edi)
113
114 subl $32,%esi
115 addl $64,%edx
116 leal 4(%edi),%edi
117 loop .L4
118 emms
119 popl %ebx
120 popl %esi
121 popl %edi
122 popl %ebp
123 ret
124
125 /* Mark non-executable stack. */
126 #if defined(__linux__) && defined(__ELF__)
127 .section .note.GNU-stack,"",%progbits
128 #endif
129