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562
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1 /*
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2 decode_MMX.s: MMX optimized synth
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3
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4 copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
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5 see COPYING and AUTHORS files in distribution or http://mpg123.org
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6 initially written by the mysterious higway (apparently)
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7
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8 Thomas' words about a note:
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9 Initially, I found the note "this code comes under GPL" in this file.
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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.
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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.
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12 */
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13
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14 #include "mangle.h"
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15
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16 .text
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17
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18 .globl ASM_NAME(synth_1to1_MMX)
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19 /* int synth_1to1_MMX(real *bandPtr, int channel, short *out, short *buffs, int *bo, float *decwins); */
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20 ASM_NAME(synth_1to1_MMX):
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21 pushl %ebp
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22 pushl %edi
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23 pushl %esi
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24 pushl %ebx
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25 /* 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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26 movl 24(%esp),%ecx
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27 movl 28(%esp),%edi
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28 movl $15,%ebx
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29 movl 36(%esp),%edx
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30 leal (%edi,%ecx,2),%edi
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31 decl %ecx
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32 movl 32(%esp),%esi
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33 movl (%edx),%eax
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34 jecxz .L1
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35 decl %eax
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36 andl %ebx,%eax
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37 leal 1088(%esi),%esi
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38 movl %eax,(%edx)
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39 .L1:
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40 leal (%esi,%eax,2),%edx
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41 movl %eax,%ebp
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42 incl %eax
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43 pushl 20(%esp)
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44 andl %ebx,%eax
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45 leal 544(%esi,%eax,2),%ecx
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46 incl %ebx
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47 testl $1, %eax
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48 jnz .L2
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49 xchgl %edx,%ecx
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50 incl %ebp
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51 leal 544(%esi),%esi
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52 .L2:
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53 pushl %edx
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54 pushl %ecx
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55 call ASM_NAME(dct64_MMX)
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56 addl $12,%esp
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57 /* stack like before, pushed 3, incremented again */
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58 leal 1(%ebx), %ecx
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59 subl %ebp,%ebx
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60 pushl %eax
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61 movl 44(%esp),%eax /* decwins */
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62 leal (%eax,%ebx,2), %edx
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63 popl %eax
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64 .L3:
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65 movq (%edx),%mm0
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66 pmaddwd (%esi),%mm0
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67 movq 8(%edx),%mm1
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68 pmaddwd 8(%esi),%mm1
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69 movq 16(%edx),%mm2
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70 pmaddwd 16(%esi),%mm2
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71 movq 24(%edx),%mm3
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72 pmaddwd 24(%esi),%mm3
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73 paddd %mm1,%mm0
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74 paddd %mm2,%mm0
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75 paddd %mm3,%mm0
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76 movq %mm0,%mm1
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77 psrlq $32,%mm1
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78 paddd %mm1,%mm0
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79 psrad $13,%mm0
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80 packssdw %mm0,%mm0
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81 movd %mm0,%eax
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82 movw %ax, (%edi)
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83
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84 leal 32(%esi),%esi
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85 leal 64(%edx),%edx
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86 leal 4(%edi),%edi
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87 loop .L3
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88
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89
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90 subl $64,%esi
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91 movl $15,%ecx
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92 .L4:
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93 movq (%edx),%mm0
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94 pmaddwd (%esi),%mm0
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95 movq 8(%edx),%mm1
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96 pmaddwd 8(%esi),%mm1
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97 movq 16(%edx),%mm2
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98 pmaddwd 16(%esi),%mm2
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99 movq 24(%edx),%mm3
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100 pmaddwd 24(%esi),%mm3
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101 paddd %mm1,%mm0
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102 paddd %mm2,%mm0
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103 paddd %mm3,%mm0
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104 movq %mm0,%mm1
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105 psrlq $32,%mm1
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106 paddd %mm0,%mm1
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107 psrad $13,%mm1
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108 packssdw %mm1,%mm1
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109 psubd %mm0,%mm0
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110 psubsw %mm1,%mm0
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111 movd %mm0,%eax
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112 movw %ax,(%edi)
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113
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114 subl $32,%esi
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115 addl $64,%edx
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116 leal 4(%edi),%edi
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117 loop .L4
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118 emms
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119 popl %ebx
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120 popl %esi
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121 popl %edi
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122 popl %ebp
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123 ret
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124
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125 /* Mark non-executable stack. */
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126 #if defined(__linux__) && defined(__ELF__)
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127 .section .note.GNU-stack,"",%progbits
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128 #endif
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129
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