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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
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12 GLOBAL _ConvertMMX
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13 GLOBAL _mmxreturn
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14
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15
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16 SECTION .text
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17
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18 ;; _ConvertMMX:
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19 ;; [ESP+8] ConverterInfo*
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20 ;; --------------------------------------------------------------------------
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21 ;; ConverterInfo (ebp+..)
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22 ;; 0: void *s_pixels
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23 ;; 4: int s_width
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24 ;; 8: int s_height
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25 ;; 12: int s_add
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26 ;; 16: void *d_pixels
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27 ;; 20: int d_width
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28 ;; 24: int d_height
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29 ;; 28: int d_add
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30 ;; 32: void (*converter_function)()
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31 ;; 36: int32 *lookup
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32
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33 _ConvertMMX:
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34 push ebp
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35 mov ebp,esp
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36
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37 ; Save the registers used by the blitters, necessary for optimized code
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38 pusha
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39
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40 mov eax,[ebp+8]
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41
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42 cmp dword [eax+4],BYTE 0
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43 je endconvert
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44
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45 mov ebp,eax
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46
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47 mov esi,[ebp+0]
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48 mov edi,[ebp+16]
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49
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50 y_loop:
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51 mov ecx,[ebp+4]
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52
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53 jmp [ebp+32]
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54
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55 _mmxreturn:
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56 add esi,[ebp+12]
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57 add edi,[ebp+28]
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58
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59 dec dword [ebp+8]
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60 jnz y_loop
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61
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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 emms
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70
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71 ret
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72
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73
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74
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