annotate src/hermes/x86_main.asm @ 1873:eb4d9d99849b

Renamed, per Mike's comment on bug #157
author Sam Lantinga <slouken@libsdl.org>
date Wed, 21 Jun 2006 08:26:05 +0000
parents 9ff9a58fa1e3
children 180fa05e98e2
rev   line source
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1 ;
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2 ; x86 format converters for HERMES
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3 ; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at)
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4 ; This source code is licensed under the GNU LGPL
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5 ;
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6 ; Please refer to the file COPYING.LIB contained in the distribution for
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7 ; licensing conditions
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8 ;
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9 ; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission
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10 ;
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11
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12 BITS 32
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13
1873
eb4d9d99849b Renamed, per Mike's comment on bug #157
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14 %include "common.inc"
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15
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16 SDL_FUNC _ConvertX86
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17 SDL_FUNC _x86return
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18
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19 SDL_FUNC _Hermes_X86_CPU
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20
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21 SECTION .text
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22
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23 ;; _ConvertX86:
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24 ;; [ESP+8] ConverterInfo*
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25 ;; --------------------------------------------------------------------------
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26 ;; ConverterInfo (ebp+..)
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27 ;; 0: void *s_pixels
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28 ;; 4: int s_width
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29 ;; 8: int s_height
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30 ;; 12: int s_add
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31 ;; 16: void *d_pixels
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32 ;; 20: int d_width
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33 ;; 24: int d_height
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34 ;; 28: int d_add
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35 ;; 32: void (*converter_function)()
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36 ;; 36: int32 *lookup
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37
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38 _ConvertX86:
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39 push ebp
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40 mov ebp,esp
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41
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42 ; Save the registers used by the blitters, necessary for optimized code
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43 pusha
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44
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45 mov eax,[ebp+8]
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46
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47 cmp dword [eax+4],BYTE 0
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48 je endconvert
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49
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50 mov ebp,eax
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51
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52 mov esi,[ebp+0]
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53 mov edi,[ebp+16]
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54
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55 y_loop:
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56 mov ecx,[ebp+4]
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57
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58 jmp [ebp+32]
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59
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60 _x86return:
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61 add esi,[ebp+12]
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62 add edi,[ebp+28]
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63
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64 dec dword [ebp+8]
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65 jnz y_loop
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66
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67 ; Restore the registers used by the blitters, necessary for optimized code
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68 popa
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69
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70 pop ebp
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71
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72 endconvert:
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73 ret
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74
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75
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76
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77 ;; Hermes_X86_CPU returns the CPUID flags in eax
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78
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79 _Hermes_X86_CPU:
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80 pushfd
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81 pop eax
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82
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83 mov ecx,eax
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84
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85 xor eax,040000h
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86 push eax
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87
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88 popfd
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89 pushfd
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90
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91 pop eax
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92 xor eax,ecx
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93 jz .L1 ; Processor is 386
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94
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95 push ecx
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96 popfd
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97
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98 mov eax,ecx
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99 xor eax,200000h
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100
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101 push eax
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102 popfd
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103 pushfd
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104
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105 pop eax
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106 xor eax,ecx
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107 je .L1
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108
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109 push ebx
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110
0
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111 mov eax,1
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112 cpuid
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113 mov eax,edx
0
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114
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115 pop ebx
0
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116
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117 .L1:
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118 ret
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119
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120 %ifidn __OUTPUT_FORMAT__,elf
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121 section .note.GNU-stack noalloc noexec nowrite progbits
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122 %endif