RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

code review and optimizations

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@180 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-07-03 19:23:12 +00:00
parent 3a5e6cf847
commit 85a36a57a8
10 changed files with 540 additions and 364 deletions
Download patch file Download diff file Expand all files Collapse all files

18
cpu/Cyclone/Main.cpp
View file

@ -277,6 +277,7 @@ static void PrintFramework()
ot(" bx lr\n");
ot("\n");
#endif
// 68k: XNZVC, ARM: NZCV
if (ms) ot("CycloneSetSr\n");
else ot("CycloneSetSr:\n");
ot(" mov r2,r1,lsr #8\n");
@ -291,8 +292,8 @@ static void PrintFramework()
ot(" str r3,[r0,#0x3C]\n");
ot(" str r2,[r0,#0x48]\n");
ot("setsr_noswap%s\n",ms?"":":");
ot(" mov r2,r1,lsr #3\n");
ot(" strb r2,[r0,#0x45] ;@ the X flag\n");
ot(" mov r2,r1,lsl #25\n");
ot(" str r2,[r0,#0x4c] ;@ the X flag\n");
ot(" bic r2,r1,#0xf3\n");
ot(" tst r1,#1\n");
ot(" orrne r2,r2,#2\n");
@ -310,8 +311,8 @@ static void PrintFramework()
ot(" orrne r2,r2,#2\n");
ot(" tst r1,#2\n");
ot(" orrne r2,r2,#1\n");
ot(" ldrb r1,[r0,#0x45] ;@ the X flag\n");
ot(" tst r1,#2\n");
ot(" ldr r1,[r0,#0x4c] ;@ the X flag\n");
ot(" tst r1,#0x20000000\n");
ot(" orrne r2,r2,#0x10\n");
ot(" ldrb r1,[r0,#0x44] ;@ the SR high\n");
ot(" orr r0,r2,r1,lsl #8\n");
@ -418,8 +419,12 @@ int MemHandler(int type,int size,int addrreg)
addrreg=0;
#endif
if (addrreg != 0)
{
ot(" add lr,pc,#4\n"); // helps to prevent interlocks
ot(" mov r0,r%i\n", addrreg);
ot(" mov lr,pc\n");
}
else
ot(" mov lr,pc\n");
ot(" ldr pc,[r7,#0x%x] ;@ Call ",func);
// Document what we are calling:
@ -473,6 +478,7 @@ static void PrintOpcodes()
ot(" mov r0,#0x10\n");
ot(" bl Exception\n");
#endif
ot("\n");
Cycles=34;
OpEnd();
@ -499,6 +505,7 @@ static void PrintOpcodes()
ot(" mov r0,#0x28\n");
ot(" bl Exception\n");
#endif
ot("\n");
Cycles=4;
OpEnd();
@ -524,6 +531,7 @@ static void PrintOpcodes()
ot(" mov r0,#0x2c\n");
ot(" bl Exception\n");
#endif
ot("\n");
Cycles=4;
OpEnd();