vba-commit

[Pokemonhacker <pok...@us...>]

Update of /cvsroot/vba/VisualBoyAdvance/src
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv19071

Modified Files:
	bios.cpp 
Log Message:
- fix BIOS ArcTan and ArcTan2 emulation (several bugs) 

Index: bios.cpp
===================================================================
RCS file: /cvsroot/vba/VisualBoyAdvance/src/bios.cpp,v
retrieving revision 1.14
retrieving revision 1.15
diff -C2 -d -r1.14 -r1.15
*** bios.cpp	9 Nov 2004 16:07:51 -0000	1.14
--- bios.cpp	18 Nov 2004 01:18:36 -0000	1.15
***************
*** 71,75 ****
  #endif
  
!   s32 a = -((s32)(reg[0].I * reg[0].I)) >> 14; 
    s32 b = ((0xA9 * a) >> 14) + 0x390;
    b = ((b * a) >> 14) + 0x91C;
--- 71,75 ----
  #endif
  
!   s32 a =  -(((s32)(reg[0].I*reg[0].I)) >> 14);
    s32 b = ((0xA9 * a) >> 14) + 0x390;
    b = ((b * a) >> 14) + 0x91C;
***************
*** 79,83 ****
    b = ((b * a) >> 14) + 0x3651;
    b = ((b * a) >> 14) + 0xA2F9;
!   reg[0].I = (reg[0].I * b) >> 16;
  
  #ifdef DEV_VERSION
--- 79,84 ----
    b = ((b * a) >> 14) + 0x3651;
    b = ((b * a) >> 14) + 0xA2F9;
!   a = ((s32)reg[0].I * b) >> 16;
!   reg[0].I = a;
  
  #ifdef DEV_VERSION
***************
*** 102,113 ****
    s16 x = reg[0].I;
    s16 y = reg[1].I;
!   
    if (y == 0) {
!     reg[0].I = 0x8000 & x;
!     reg[3].I = 0x170;
    } else {
      if (x == 0) {
!       reg[0].I = (0x8000 & y) + 0x4000;
!       reg[3].I = 0x170;
      } else {
        if (abs(x) > abs(y)) {
--- 103,112 ----
    s16 x = reg[0].I;
    s16 y = reg[1].I;
!   s16 res = 0;
    if (y == 0) {
!     res = 0x8000 & x;
    } else {
      if (x == 0) {
!       res = (0x8000 & y) + 0x4000;
      } else {
        if (abs(x) > abs(y)) {
***************
*** 117,133 ****
          BIOS_ArcTan();
          if (x < 0)
!           reg[0].I = 0x8000 + reg[0].I;
          else
!           reg[0].I = ((y & 0x8000) << 1 ) + reg[0].I;
!         reg[3].I = 0x170;
        } else {
          reg[0].I = x << 14;
          BIOS_Div();
          BIOS_ArcTan();
!         reg[0].I = (0x4000 + (y & 0x8000)) - reg[0].I;
!         reg[3].I = 0x170;
        }
      }
    }
    
  #ifdef DEV_VERSION
--- 116,131 ----
          BIOS_ArcTan();
          if (x < 0)
!           res = 0x8000 + reg[0].I;
          else
!           res = ((y & 0x8000) << 1 ) + reg[0].I;
        } else {
          reg[0].I = x << 14;
          BIOS_Div();
          BIOS_ArcTan();
!         res = (0x4000 + (y & 0x8000)) - reg[0].I;
        }
      }
    }
+   reg[0].I = ((u32)res) & 0xffff;
    
  #ifdef DEV_VERSION