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5131 | clevermous | 1 | ; |
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 | |||
12 | BITS 32 |
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6380 | ashmew2 | 13 | |
14 | SECTION .text ALIGN=16 |
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15 | |||
5131 | clevermous | 16 | GLOBAL _ConvertX86 |
17 | GLOBAL _x86return |
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18 | GLOBAL _Hermes_X86_CPU |
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19 | |||
20 | ;; _ConvertX86: |
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21 | ;; [ESP+8] ConverterInfo* |
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22 | ;; -------------------------------------------------------------------------- |
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23 | ;; ConverterInfo (ebp+..) |
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24 | ;; 0: void *s_pixels |
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25 | ;; 4: int s_width |
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26 | ;; 8: int s_height |
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27 | ;; 12: int s_add |
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28 | ;; 16: void *d_pixels |
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29 | ;; 20: int d_width |
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30 | ;; 24: int d_height |
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31 | ;; 28: int d_add |
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32 | ;; 32: void (*converter_function)() |
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33 | ;; 36: int32 *lookup |
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34 | |||
35 | _ConvertX86: |
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36 | push ebp |
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37 | mov ebp,esp |
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38 | |||
39 | ; Save the registers used by the blitters, necessary for optimized code |
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40 | pusha |
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41 | |||
42 | mov eax,[ebp+8] |
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43 | |||
44 | cmp dword [eax+4],BYTE 0 |
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45 | je endconvert |
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46 | |||
47 | mov ebp,eax |
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48 | |||
49 | mov esi,[ebp+0] |
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50 | mov edi,[ebp+16] |
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51 | |||
52 | y_loop: |
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53 | mov ecx,[ebp+4] |
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54 | |||
55 | jmp [ebp+32] |
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56 | |||
6380 | ashmew2 | 57 | _x86return: |
5131 | clevermous | 58 | add esi,[ebp+12] |
59 | add edi,[ebp+28] |
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60 | |||
61 | dec dword [ebp+8] |
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62 | jnz y_loop |
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63 | |||
64 | ; Restore the registers used by the blitters, necessary for optimized code |
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65 | popa |
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66 | |||
67 | pop ebp |
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68 | |||
69 | endconvert: |
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70 | ret |
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71 | |||
72 | |||
73 | |||
74 | ;; Hermes_X86_CPU returns the CPUID flags in eax |
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75 | |||
76 | _Hermes_X86_CPU: |
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77 | pushfd |
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78 | pop eax |
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79 | |||
80 | mov ecx,eax |
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81 | |||
82 | xor eax,040000h |
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83 | push eax |
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84 | |||
85 | popfd |
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86 | pushfd |
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87 | |||
88 | pop eax |
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89 | xor eax,ecx |
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90 | jz .L1 ; Processor is 386 |
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91 | |||
92 | push ecx |
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93 | popfd |
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94 | |||
95 | mov eax,ecx |
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96 | xor eax,200000h |
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97 | |||
98 | push eax |
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99 | popfd |
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100 | pushfd |
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101 | |||
102 | pop eax |
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103 | xor eax,ecx |
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104 | je .L1 |
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105 | |||
106 | pusha |
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107 | |||
108 | mov eax,1 |
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109 | cpuid |
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110 | |||
111 | mov [cpu_flags],edx |
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112 | |||
113 | popa |
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114 | |||
115 | mov eax,[cpu_flags] |
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116 | |||
117 | .L1: |
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118 | xor eax,eax |
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119 | ret |
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6380 | ashmew2 | 120 | |
121 | section '.DATA' ALIGN=16 |
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122 | |||
123 | cpu_flags dd 0 |
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124 |