Mercurial > sdl-ios-xcode
annotate src/hermes/mmx_main.asm @ 1230:88c2d6aed428
From Mike Frysinger and/or Gentoo:
- libsdl-PIC-load-mmx-masks-from-stack.patch
this one may be a little controversial ... the fix here is again that you cant
reference the memory addresses like this to load into a mmx register, so the
way to do it is to push two 32bit words onto the stack, load the 64bit value
off of the stack into the mmx register, and then adjust the stack so that
it's back to normal.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 05 Jan 2006 15:25:19 +0000 |
| parents | 2d6dc7de1145 |
| children | 393092a3ebf6 |
| rev | line source |
|---|---|
| 0 | 1 ; |
| 2 ; mmx format converter main loops for HERMES | |
| 3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@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 GLOBAL _ConvertMMX | |
| 13 GLOBAL _mmxreturn | |
| 14 | |
| 15 SECTION .text | |
| 16 | |
| 17 ;; _ConvertMMX: | |
| 18 ;; [ESP+8] ConverterInfo* | |
| 19 ;; -------------------------------------------------------------------------- | |
| 20 ;; ConverterInfo (ebp+..) | |
| 21 ;; 0: void *s_pixels | |
| 22 ;; 4: int s_width | |
| 23 ;; 8: int s_height | |
| 24 ;; 12: int s_add | |
| 25 ;; 16: void *d_pixels | |
| 26 ;; 20: int d_width | |
| 27 ;; 24: int d_height | |
| 28 ;; 28: int d_add | |
| 29 ;; 32: void (*converter_function)() | |
| 30 ;; 36: int32 *lookup | |
| 31 | |
| 32 _ConvertMMX: | |
| 33 push ebp | |
| 34 mov ebp,esp | |
| 35 | |
| 36 ; Save the registers used by the blitters, necessary for optimized code | |
| 37 pusha | |
| 38 | |
| 39 mov eax,[ebp+8] | |
| 40 | |
| 41 cmp dword [eax+4],BYTE 0 | |
| 42 je endconvert | |
| 43 | |
| 44 mov ebp,eax | |
| 45 | |
| 46 mov esi,[ebp+0] | |
| 47 mov edi,[ebp+16] | |
| 48 | |
| 49 y_loop: | |
| 50 mov ecx,[ebp+4] | |
| 51 | |
| 52 jmp [ebp+32] | |
| 53 | |
| 54 _mmxreturn: | |
| 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 | |
|
1199
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
72 %ifidn __OUTPUT_FORMAT__,elf |
|
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
73 section .note.GNU-stack noalloc noexec nowrite progbits |
|
2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
Ryan C. Gordon <icculus@icculus.org>
parents:
1166
diff
changeset
|
74 %endif |