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NOT setting upper bits on PUSH PC, minor adjustments

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@189 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-07-13 13:39:09 +00:00
parent c6a4c89286
commit 547045e3c6
4 changed files with 15 additions and 16 deletions
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4
cpu/Cyclone/Cyclone.h
View file

@ -40,8 +40,8 @@ struct Cyclone
unsigned short (*fetch16)(unsigned int a); // [r7,#0x84]
unsigned int (*fetch32)(unsigned int a); // [r7,#0x88]
void (*IrqCallback)(int int_level); // [r7,#0x8c] - optional irq callback function, see config.h
void (*ResetCallback)(); // [r7,#0x90] - if enabled in config.h, calls this whenever RESET opcode is encountered.
int (*UnrecognizedCallback)(); // [r7,#0x94] - if enabled in config.h, calls this whenever unrecognized opcode is encountered.
void (*ResetCallback)(void); // [r7,#0x90] - if enabled in config.h, calls this whenever RESET opcode is encountered.
int (*UnrecognizedCallback)(void); // [r7,#0x94] - if enabled in config.h, calls this whenever unrecognized opcode is encountered.
};
// used only if Cyclone was compiled with compressed jumptable, see config.h

12
cpu/Cyclone/Main.cpp
View file

@ -102,9 +102,10 @@ static void PrintException(int ints)
ot("no_sp_swap%i%s\n",ints,ms?"":":");
ot(" ldr r10,[r7,#0x60] ;@ Get Memory base\n");
ot(" mov r1,r4,lsl #8\n");
ot(" sub r1,r1,r10,lsl #8 ;@ r1 = Old PC\n");
ot(" mov r1,r1,asr #8 ;@ push sign extended\n");
// ot(" mov r1,r4,lsl #8\n");
// ot(" sub r1,r1,r10,lsl #8 ;@ r1 = Old PC\n");
// ot(" mov r1,r1,asr #8 ;@ push sign extended\n");
ot(" sub r1,r4,r10 ;@ r1 = Old PC\n");
OpPush32();
OpPushSr(1);
ot(" mov r0,r11\n");
@ -634,12 +635,11 @@ static void PrintJumpTable()
}
if(ip&1) ott("0x%.4x", 0, "\n",0,ip++,1);
if(ip&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma
ot("\n");
if(ip&7) {
for(i = 8-(ip&7); i > 0; i--)
ot(",0x0000");
ot("\n");
}
ot("\n");
if(ms) {
for(i = (0x2000-ip/2)/8+1; i > 0; i--)
ot(" dcd 0,0,0,0,0,0,0,0\n");
@ -687,7 +687,7 @@ static int CycloneMake()
ot("\n;@ Dave's Cyclone 68000 Emulator v%x.%.3x - Assembler Output\n\n",CycloneVer>>12,CycloneVer&0xfff);
ot(";@ (c) Copyright 2003 Dave, All rights reserved.\n");
ot(";@ some code (c) Copyright 2005-2006 notaz, All rights reserved.\n");
ot(";@ some code (c) Copyright 2005-2007 notaz, All rights reserved.\n");
ot(";@ Cyclone 68000 is free for non-commercial use.\n\n");
ot(";@ For commercial use, separate licencing terms must be obtained.\n\n");

3
cpu/Cyclone/OpArith.cpp
View file

@ -553,8 +553,7 @@ int OpAritha(int op)
// EA calculation order defines how situations like suba.w (A0)+, A0 get handled.
// different emus act differently in this situation, I couldn't fugure which is right behaviour.
// This is Musashi's behaviour.
if (type == 1)
if (/*type == */1)
{
EaCalcReadNoSE(-1,0,sea,size,0x003f);
EaCalcReadNoSE(type!=1?10:-1,11,dea,2,0x0e00);

12
cpu/Cyclone/OpBranch.cpp
View file

@ -243,10 +243,10 @@ int OpJsr(int op)
else
{
ot(";@ Jsr - Push old PC first\n");
ot(" sub r1,r4,r10 ;@ r1 = Old PC\n");
ot(" mov r1,r1,lsl #8\n");
ot(" ldr r0,[r7,#0x3c]\n");
ot(" mov r1,r1,asr #8\n");
ot(" sub r1,r4,r10 ;@ r1 = Old PC\n");
// ot(" mov r1,r1,lsl #8\n");
// ot(" mov r1,r1,asr #8\n");
ot(";@ Push r1 onto stack\n");
ot(" sub r0,r0,#4 ;@ Predecrement A7\n");
ot(" str r0,[r7,#0x3c] ;@ Save A7\n");
@ -438,11 +438,11 @@ int OpBranch(int op)
if (cc==1)
{
ot(";@ Bsr - remember old PC\n");
ot(" ldr r2,[r7,#0x3c]\n");
ot(" sub r1,r4,r10 ;@ r1 = Old PC\n");
if (size) ot(" add r1,r1,#%d\n",1<<size);
ot(" mov r1,r1, lsl #8\n");
ot(" ldr r2,[r7,#0x3c]\n");
ot(" mov r1,r1, asr #8\n");
// ot(" mov r1,r1, lsl #8\n");
// ot(" mov r1,r1, asr #8\n");
ot("\n");
ot(";@ Push r1 onto stack\n");
ot(" sub r0,r2,#4 ;@ Predecrement A7\n");