1 ; 2 ; mmx format converter main loops for HERMES 3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich (a] cs.ucl.ac.uk) 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 10 BITS 32 11 12 %include "common.inc" 13 14 SDL_FUNC _ConvertMMX 15 16 SECTION .text 17 18 ;; _ConvertMMX: 19 ;; [ESP+8] ConverterInfo* 20 ;; -------------------------------------------------------------------------- 21 ;; ConverterInfo (ebp+..) 22 ;; 0: void *s_pixels 23 ;; 4: int s_width 24 ;; 8: int s_height 25 ;; 12: int s_add 26 ;; 16: void *d_pixels 27 ;; 20: int d_width 28 ;; 24: int d_height 29 ;; 28: int d_add 30 ;; 32: void (*converter_function)() 31 ;; 36: int32 *lookup 32 33 _ConvertMMX: 34 push ebp 35 mov ebp,esp 36 37 ; Save the registers used by the blitters, necessary for optimized code 38 pusha 39 40 mov eax,[ebp+8] 41 42 cmp dword [eax+4],BYTE 0 43 je endconvert 44 45 mov ebp,eax 46 47 mov esi,[ebp+0] 48 mov edi,[ebp+16] 49 50 y_loop: 51 mov ecx,[ebp+4] 52 53 call [ebp+32] 54 55 add esi,[ebp+12] 56 add edi,[ebp+28] 57 58 dec dword [ebp+8] 59 jnz y_loop 60 61 62 ; Restore the registers used by the blitters, necessary for optimized code 63 popa 64 65 pop ebp 66 67 endconvert: 68 emms 69 70 ret 71 72 %ifidn __OUTPUT_FORMAT__,elf 73 section .note.GNU-stack noalloc noexec nowrite progbits 74 %endif 75
