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annotate src/hermes/x86_main.asm @ 2218:6cc82cad8b77

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1.3 video API design chat
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Aug 2007 07:08:25 +0000
parents 180fa05e98e2
children
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
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eb4d9d99849b Renamed, per Mike's comment on bug #157
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14 %include "common.inc"
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9ff9a58fa1e3 Fixed bug #157
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15
9ff9a58fa1e3 Fixed bug #157
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16 SDL_FUNC _ConvertX86
0
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17
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18 SECTION .text
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19
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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
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35 _ConvertX86:
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36 push ebp
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37 mov ebp,esp
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38
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39 ; Save the registers used by the blitters, necessary for optimized code
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40 pusha
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41
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42 mov eax,[ebp+8]
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43
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44 cmp dword [eax+4],BYTE 0
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45 je endconvert
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46
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47 mov ebp,eax
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48
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49 mov esi,[ebp+0]
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50 mov edi,[ebp+16]
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51
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52 y_loop:
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53 mov ecx,[ebp+4]
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54
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180fa05e98e2 Merged r3106:3107 from branches/SDL-1.2: Hermes PIC fixes.
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55 call [ebp+32]
0
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56
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57 add esi,[ebp+12]
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58 add edi,[ebp+28]
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59
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60 dec dword [ebp+8]
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61 jnz y_loop
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62
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63 ; Restore the registers used by the blitters, necessary for optimized code
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64 popa
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65
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66 pop ebp
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67
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68 endconvert:
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69 ret
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70
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71
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72
1199
2d6dc7de1145 From: Mike Frysinger <vapier@gentoo.org>
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73 %ifidn __OUTPUT_FORMAT__,elf
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74 section .note.GNU-stack noalloc noexec nowrite progbits
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75 %endif