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annotate src/hermes/mmx_main.asm @ 3796:b19680c84cdf SDL-ryan-multiple-audio-device

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Bunch of 1.3 audio cleanups to remove FIXMEs, get driver specific crap out of the core and into the drivers where it belongs, and push generic responsibilities out of the drivers and into the core where they belong.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 04 Oct 2006 19:54:23 +0000
parents eb4d9d99849b
children 180fa05e98e2
rev   line source
0
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1 ;
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2 ; mmx format converter main loops for HERMES
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3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk)
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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
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10 BITS 32
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11
1873
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12 %include "common.inc"
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13
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14 SDL_FUNC _ConvertMMX
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15 SDL_FUNC _mmxreturn
0
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16
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17 SECTION .text
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18
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19 ;; _ConvertMMX:
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20 ;; [ESP+8] ConverterInfo*
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21 ;; --------------------------------------------------------------------------
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22 ;; ConverterInfo (ebp+..)
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23 ;; 0: void *s_pixels
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24 ;; 4: int s_width
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25 ;; 8: int s_height
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26 ;; 12: int s_add
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27 ;; 16: void *d_pixels
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28 ;; 20: int d_width
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29 ;; 24: int d_height
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30 ;; 28: int d_add
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31 ;; 32: void (*converter_function)()
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32 ;; 36: int32 *lookup
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33
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34 _ConvertMMX:
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35 push ebp
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36 mov ebp,esp
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37
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38 ; Save the registers used by the blitters, necessary for optimized code
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39 pusha
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40
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41 mov eax,[ebp+8]
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42
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43 cmp dword [eax+4],BYTE 0
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44 je endconvert
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45
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46 mov ebp,eax
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47
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48 mov esi,[ebp+0]
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49 mov edi,[ebp+16]
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50
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51 y_loop:
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52 mov ecx,[ebp+4]
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53
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54 jmp [ebp+32]
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55
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56 _mmxreturn:
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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
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64 ; Restore the registers used by the blitters, necessary for optimized code
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65 popa
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66
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67 pop ebp
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68
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69 endconvert:
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70 emms
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71
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72 ret
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73
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74 %ifidn __OUTPUT_FORMAT__,elf
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75 section .note.GNU-stack noalloc noexec nowrite progbits
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76 %endif