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annotate src/hermes/mmx_main.asm @ 1795:398ac0f88e4d

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Fixed bug #220 The AltiVec blitters don't compile, since they require __VEC__ to be enabled in order for the compiler to understand "vector" and friends (i.e. do AltiVec) But you don't want to turn AltiVec on globally, since then the code would only run on a G4 (there are already runtime tests, before using the AltiVec variants) The solution here is to enable AltiVec locally, for the actual AltiVec code.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 09 May 2006 15:09:47 +0000
parents 2d6dc7de1145
children 393092a3ebf6
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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 SECTION .text
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16
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17 ;; _ConvertMMX:
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18 ;; [ESP+8] ConverterInfo*
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19 ;; --------------------------------------------------------------------------
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20 ;; ConverterInfo (ebp+..)
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21 ;; 0: void *s_pixels
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22 ;; 4: int s_width
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23 ;; 8: int s_height
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24 ;; 12: int s_add
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25 ;; 16: void *d_pixels
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26 ;; 20: int d_width
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27 ;; 24: int d_height
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28 ;; 28: int d_add
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29 ;; 32: void (*converter_function)()
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30 ;; 36: int32 *lookup
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31
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32 _ConvertMMX:
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33 push ebp
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34 mov ebp,esp
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35
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36 ; Save the registers used by the blitters, necessary for optimized code
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37 pusha
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38
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39 mov eax,[ebp+8]
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40
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41 cmp dword [eax+4],BYTE 0
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42 je endconvert
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43
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44 mov ebp,eax
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45
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46 mov esi,[ebp+0]
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47 mov edi,[ebp+16]
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48
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49 y_loop:
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50 mov ecx,[ebp+4]
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51
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52 jmp [ebp+32]
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53
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54 _mmxreturn:
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55 add esi,[ebp+12]
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56 add edi,[ebp+28]
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57
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58 dec dword [ebp+8]
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59 jnz y_loop
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60
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61
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62 ; Restore the registers used by the blitters, necessary for optimized code
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63 popa
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64
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65 pop ebp
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66
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67 endconvert:
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68 emms
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69
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70 ret
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71
1199
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72 %ifidn __OUTPUT_FORMAT__,elf
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73 section .note.GNU-stack noalloc noexec nowrite progbits
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74 %endif