Mercurial > sdl-ios-xcode
annotate src/hermes/x86_main.asm @ 1215:d082d2d66ec8
Added support for parsing /etc/fb.modes, based on Stephane Marchesin's patch
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 02 Jan 2006 09:08:05 +0000 |
| parents | 2d6dc7de1145 |
| children | 3202d727bb4b |
| 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 | |
| 14 GLOBAL _ConvertX86 | |
| 15 GLOBAL _x86return | |
| 16 | |
| 17 GLOBAL _Hermes_X86_CPU | |
| 18 | |
| 19 SECTION .data | |
| 20 | |
| 21 cpu_flags dd 0 | |
| 22 | |
| 23 | |
| 24 SECTION .text | |
| 25 | |
| 26 ;; _ConvertX86: | |
| 27 ;; [ESP+8] ConverterInfo* | |
| 28 ;; -------------------------------------------------------------------------- | |
| 29 ;; ConverterInfo (ebp+..) | |
| 30 ;; 0: void *s_pixels | |
| 31 ;; 4: int s_width | |
| 32 ;; 8: int s_height | |
| 33 ;; 12: int s_add | |
| 34 ;; 16: void *d_pixels | |
| 35 ;; 20: int d_width | |
| 36 ;; 24: int d_height | |
| 37 ;; 28: int d_add | |
| 38 ;; 32: void (*converter_function)() | |
| 39 ;; 36: int32 *lookup | |
| 40 | |
| 41 _ConvertX86: | |
| 42 push ebp | |
| 43 mov ebp,esp | |
| 44 | |
| 45 ; Save the registers used by the blitters, necessary for optimized code | |
| 46 pusha | |
| 47 | |
| 48 mov eax,[ebp+8] | |
| 49 | |
| 50 cmp dword [eax+4],BYTE 0 | |
| 51 je endconvert | |
| 52 | |
| 53 mov ebp,eax | |
| 54 | |
| 55 mov esi,[ebp+0] | |
| 56 mov edi,[ebp+16] | |
| 57 | |
| 58 y_loop: | |
| 59 mov ecx,[ebp+4] | |
| 60 | |
| 61 jmp [ebp+32] | |
| 62 | |
| 63 _x86return: | |
| 64 add esi,[ebp+12] | |
| 65 add edi,[ebp+28] | |
| 66 | |
| 67 dec dword [ebp+8] | |
| 68 jnz y_loop | |
| 69 | |
| 70 ; Restore the registers used by the blitters, necessary for optimized code | |
| 71 popa | |
| 72 | |
| 73 pop ebp | |
| 74 | |
| 75 endconvert: | |
| 76 ret | |
| 77 | |
| 78 | |
| 79 | |
| 80 ;; Hermes_X86_CPU returns the CPUID flags in eax | |
| 81 | |
| 82 _Hermes_X86_CPU: | |
| 83 pushfd | |
| 84 pop eax | |
| 85 | |
| 86 mov ecx,eax | |
| 87 | |
| 88 xor eax,040000h | |
| 89 push eax | |
| 90 | |
| 91 popfd | |
| 92 pushfd | |
| 93 | |
| 94 pop eax | |
| 95 xor eax,ecx | |
| 96 jz .L1 ; Processor is 386 | |
| 97 | |
| 98 push ecx | |
| 99 popfd | |
| 100 | |
| 101 mov eax,ecx | |
| 102 xor eax,200000h | |
| 103 | |
| 104 push eax | |
| 105 popfd | |
| 106 pushfd | |
| 107 | |
| 108 pop eax | |
| 109 xor eax,ecx | |
| 110 je .L1 | |
| 111 | |
| 112 pusha | |
| 113 | |
| 114 mov eax,1 | |
| 115 cpuid | |
| 116 | |
| 117 mov [cpu_flags],edx | |
| 118 | |
| 119 popa | |
| 120 | |
| 121 mov eax,[cpu_flags] | |
| 122 | |
| 123 .L1: | |
| 124 ret | |
|
1199
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
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125 |
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2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
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126 %ifidn __OUTPUT_FORMAT__,elf |
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2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
127 section .note.GNU-stack noalloc noexec nowrite progbits |
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2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
128 %endif |