annotate src/hermes/x86_main.asm @ 1856:21f13c787b46

Date: Mon, 22 May 2006 01:16:47 -0400 From: Mike Frysinger Subject: [SDL] [patch] fix sed expression in sdl-config just noticed that sdl-config uses '[a-z]' with sed in sdl-config without forcing the locale to C ... this could cause problems with locales where the letter 'z' is not the last letter in the alphabet
author Sam Lantinga <slouken@libsdl.org>
date Tue, 23 May 2006 15:07:56 +0000
parents 3202d727bb4b
children 393092a3ebf6
rev   line source
0
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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
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14 GLOBAL _ConvertX86
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15 GLOBAL _x86return
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16
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17 GLOBAL _Hermes_X86_CPU
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18
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19 SECTION .text
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20
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21 ;; _ConvertX86:
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22 ;; [ESP+8] ConverterInfo*
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23 ;; --------------------------------------------------------------------------
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24 ;; ConverterInfo (ebp+..)
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25 ;; 0: void *s_pixels
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26 ;; 4: int s_width
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27 ;; 8: int s_height
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28 ;; 12: int s_add
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29 ;; 16: void *d_pixels
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30 ;; 20: int d_width
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31 ;; 24: int d_height
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32 ;; 28: int d_add
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33 ;; 32: void (*converter_function)()
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34 ;; 36: int32 *lookup
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35
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36 _ConvertX86:
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37 push ebp
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38 mov ebp,esp
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39
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40 ; Save the registers used by the blitters, necessary for optimized code
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41 pusha
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42
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43 mov eax,[ebp+8]
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44
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45 cmp dword [eax+4],BYTE 0
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46 je endconvert
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47
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48 mov ebp,eax
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49
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50 mov esi,[ebp+0]
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51 mov edi,[ebp+16]
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52
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53 y_loop:
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54 mov ecx,[ebp+4]
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55
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56 jmp [ebp+32]
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57
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58 _x86return:
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59 add esi,[ebp+12]
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60 add edi,[ebp+28]
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61
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62 dec dword [ebp+8]
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63 jnz y_loop
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64
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65 ; Restore the registers used by the blitters, necessary for optimized code
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66 popa
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67
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68 pop ebp
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69
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70 endconvert:
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71 ret
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72
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73
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74
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75 ;; Hermes_X86_CPU returns the CPUID flags in eax
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76
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77 _Hermes_X86_CPU:
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78 pushfd
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79 pop eax
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80
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81 mov ecx,eax
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82
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83 xor eax,040000h
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84 push eax
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85
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86 popfd
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87 pushfd
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88
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89 pop eax
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90 xor eax,ecx
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91 jz .L1 ; Processor is 386
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92
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93 push ecx
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94 popfd
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95
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96 mov eax,ecx
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97 xor eax,200000h
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98
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99 push eax
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100 popfd
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101 pushfd
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102
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103 pop eax
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104 xor eax,ecx
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105 je .L1
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106
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107 push ebx
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108
0
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109 mov eax,1
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110 cpuid
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111 mov eax,edx
0
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112
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113 pop ebx
0
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114
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115 .L1:
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116 ret
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117
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118 %ifidn __OUTPUT_FORMAT__,elf
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119 section .note.GNU-stack noalloc noexec nowrite progbits
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120 %endif