Mercurial > sdl-ios-xcode
annotate src/hermes/x86_main.asm @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 10 Jul 2006 21:04:37 +0000 |
| parents | eb4d9d99849b |
| children | 180fa05e98e2 |
| rev | line source |
|---|---|
| 0 | 1 ; |
| 2 ; x86 format converters for HERMES | |
| 3 ; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at) | |
| 4 ; This source code is licensed under the GNU LGPL | |
| 5 ; | |
| 6 ; Please refer to the file COPYING.LIB contained in the distribution for | |
| 7 ; licensing conditions | |
| 8 ; | |
| 9 ; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission | |
| 10 ; | |
| 11 | |
| 12 BITS 32 | |
| 13 | |
|
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Sam Lantinga <slouken@libsdl.org>
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14 %include "common.inc" |
| 1871 | 15 |
| 16 SDL_FUNC _ConvertX86 | |
| 17 SDL_FUNC _x86return | |
| 0 | 18 |
| 1871 | 19 SDL_FUNC _Hermes_X86_CPU |
| 0 | 20 |
| 21 SECTION .text | |
| 22 | |
| 23 ;; _ConvertX86: | |
| 24 ;; [ESP+8] ConverterInfo* | |
| 25 ;; -------------------------------------------------------------------------- | |
| 26 ;; ConverterInfo (ebp+..) | |
| 27 ;; 0: void *s_pixels | |
| 28 ;; 4: int s_width | |
| 29 ;; 8: int s_height | |
| 30 ;; 12: int s_add | |
| 31 ;; 16: void *d_pixels | |
| 32 ;; 20: int d_width | |
| 33 ;; 24: int d_height | |
| 34 ;; 28: int d_add | |
| 35 ;; 32: void (*converter_function)() | |
| 36 ;; 36: int32 *lookup | |
| 37 | |
| 38 _ConvertX86: | |
| 39 push ebp | |
| 40 mov ebp,esp | |
| 41 | |
| 42 ; Save the registers used by the blitters, necessary for optimized code | |
| 43 pusha | |
| 44 | |
| 45 mov eax,[ebp+8] | |
| 46 | |
| 47 cmp dword [eax+4],BYTE 0 | |
| 48 je endconvert | |
| 49 | |
| 50 mov ebp,eax | |
| 51 | |
| 52 mov esi,[ebp+0] | |
| 53 mov edi,[ebp+16] | |
| 54 | |
| 55 y_loop: | |
| 56 mov ecx,[ebp+4] | |
| 57 | |
| 58 jmp [ebp+32] | |
| 59 | |
| 60 _x86return: | |
| 61 add esi,[ebp+12] | |
| 62 add edi,[ebp+28] | |
| 63 | |
| 64 dec dword [ebp+8] | |
| 65 jnz y_loop | |
| 66 | |
| 67 ; Restore the registers used by the blitters, necessary for optimized code | |
| 68 popa | |
| 69 | |
| 70 pop ebp | |
| 71 | |
| 72 endconvert: | |
| 73 ret | |
| 74 | |
| 75 | |
| 76 | |
| 77 ;; Hermes_X86_CPU returns the CPUID flags in eax | |
| 78 | |
| 79 _Hermes_X86_CPU: | |
| 80 pushfd | |
| 81 pop eax | |
| 82 | |
| 83 mov ecx,eax | |
| 84 | |
| 85 xor eax,040000h | |
| 86 push eax | |
| 87 | |
| 88 popfd | |
| 89 pushfd | |
| 90 | |
| 91 pop eax | |
| 92 xor eax,ecx | |
| 93 jz .L1 ; Processor is 386 | |
| 94 | |
| 95 push ecx | |
| 96 popfd | |
| 97 | |
| 98 mov eax,ecx | |
| 99 xor eax,200000h | |
| 100 | |
| 101 push eax | |
| 102 popfd | |
| 103 pushfd | |
| 104 | |
| 105 pop eax | |
| 106 xor eax,ecx | |
| 107 je .L1 | |
| 108 | |
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Ryan C. Gordon <icculus@icculus.org>
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109 push ebx |
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110 |
| 0 | 111 mov eax,1 |
| 112 cpuid | |
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113 mov eax,edx |
| 0 | 114 |
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parents:
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115 pop ebx |
| 0 | 116 |
| 117 .L1: | |
| 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 |