libogc/video_asm.S

   1 /*-------------------------------------------------------------
   2
   3 video_asm.S -- VIDEO subsystem assembler support
   4
   5 Copyright (C) 2004
   6 Michael Wiedenbauer (shagkur)
   7 Dave Murphy (WinterMute)
   8
   9 This software is provided 'as-is', without any express or implied
  10 warranty.  In no event will the authors be held liable for any
  11 damages arising from the use of this software.
  12
  13 Permission is granted to anyone to use this software for any
  14 purpose, including commercial applications, and to alter it and
  15 redistribute it freely, subject to the following restrictions:
  16
  17 1.      The origin of this software must not be misrepresented; you
  18 must not claim that you wrote the original software. If you use
  19 this software in a product, an acknowledgment in the product
  20 documentation would be appreciated but is not required.
  21
  22 2.      Altered source versions must be plainly marked as such, and
  23 must not be misrepresented as being the original software.
  24
  25 3.      This notice may not be removed or altered from any source
  26 distribution.
  27
  28 -------------------------------------------------------------*/
  29
  30
  31 #include <asm.h>
  32
  33         .globl __VIClearFramebuffer
  34         //r3 = dst, r4 = length(bytes),r5 = color
  35 __VIClearFramebuffer:
  36         srwi.   r0,r4,8
  37         beq             2f
  38         mtctr   r0
  39         subi    r3,r3,4
  40 1:      stwu    r5,4(r3)
  41         stwu    r5,4(r3)
  42         stwu    r5,4(r3)
  43         stwu    r5,4(r3)
  44         stwu    r5,4(r3)
  45         stwu    r5,4(r3)
  46         stwu    r5,4(r3)
  47         stwu    r5,4(r3)
  48         stwu    r5,4(r3)
  49         stwu    r5,4(r3)
  50         stwu    r5,4(r3)
  51         stwu    r5,4(r3)
  52         stwu    r5,4(r3)
  53         stwu    r5,4(r3)
  54         stwu    r5,4(r3)
  55         stwu    r5,4(r3)
  56         stwu    r5,4(r3)
  57         stwu    r5,4(r3)
  58         stwu    r5,4(r3)
  59         stwu    r5,4(r3)
  60         stwu    r5,4(r3)
  61         stwu    r5,4(r3)
  62         stwu    r5,4(r3)
  63         stwu    r5,4(r3)
  64         stwu    r5,4(r3)
  65         stwu    r5,4(r3)
  66         stwu    r5,4(r3)
  67         stwu    r5,4(r3)
  68         stwu    r5,4(r3)
  69         stwu    r5,4(r3)
  70         stwu    r5,4(r3)
  71         stwu    r5,4(r3)
  72
  73         stwu    r5,4(r3)
  74         stwu    r5,4(r3)
  75         stwu    r5,4(r3)
  76         stwu    r5,4(r3)
  77         stwu    r5,4(r3)
  78         stwu    r5,4(r3)
  79         stwu    r5,4(r3)
  80         stwu    r5,4(r3)
  81         stwu    r5,4(r3)
  82         stwu    r5,4(r3)
  83         stwu    r5,4(r3)
  84         stwu    r5,4(r3)
  85         stwu    r5,4(r3)
  86         stwu    r5,4(r3)
  87         stwu    r5,4(r3)
  88         stwu    r5,4(r3)
  89         stwu    r5,4(r3)
  90         stwu    r5,4(r3)
  91         stwu    r5,4(r3)
  92         stwu    r5,4(r3)
  93         stwu    r5,4(r3)
  94         stwu    r5,4(r3)
  95         stwu    r5,4(r3)
  96         stwu    r5,4(r3)
  97         stwu    r5,4(r3)
  98         stwu    r5,4(r3)
  99         stwu    r5,4(r3)
 100         stwu    r5,4(r3)
 101         stwu    r5,4(r3)
 102         stwu    r5,4(r3)
 103         stwu    r5,4(r3)
 104         stwu    r5,4(r3)
 105         bdnz    1b
 106 2:      blr