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Implement x86 instruction Bsr

This commit is contained in:
LegendOfDragoon 2015-09-25 03:50:47 -07:00
parent 97cdd04ac0
commit dc52573644
2 changed files with 31 additions and 0 deletions
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30
Source/RSP/X86.c
View File

@ -427,6 +427,36 @@ void X86BreakPoint (LPCSTR FileName, int LineNumber) {
PUTDST8(RecompPos,0xCC);
}
void BsrX86RegToX86Reg(int Destination, int Source) {
BYTE x86Command = 0;
CPU_Message(" bsr %s, %s", x86_Name(Destination), x86_Name(Source));
PUTDST16(RecompPos, 0xBD0F);
switch (Source) {
case x86_EAX: x86Command = 0x00; break;
case x86_EBX: x86Command = 0x03; break;
case x86_ECX: x86Command = 0x01; break;
case x86_EDX: x86Command = 0x02; break;
case x86_ESI: x86Command = 0x06; break;
case x86_EDI: x86Command = 0x07; break;
case x86_ESP: x86Command = 0x04; break;
case x86_EBP: x86Command = 0x05; break;
}
switch (Destination) {
case x86_EAX: x86Command += 0xC0; break;
case x86_EBX: x86Command += 0xD8; break;
case x86_ECX: x86Command += 0xC8; break;
case x86_EDX: x86Command += 0xD0; break;
case x86_ESI: x86Command += 0xF0; break;
case x86_EDI: x86Command += 0xF8; break;
case x86_ESP: x86Command += 0xE0; break;
case x86_EBP: x86Command += 0xE8; break;
}
PUTDST8(RecompPos, x86Command);
}
void Call_Direct(void * FunctAddress, char * FunctName) {
CPU_Message(" call offset %s",FunctName);
PUTDST8(RecompPos,0xE8);

1
Source/RSP/X86.h
View File

@ -59,6 +59,7 @@ void AndX86RegToVariable ( void * Variable, char * VariableName, int x86Reg );
void AndX86RegToX86Reg ( int Destination, int Source );
void AndX86RegHalfToX86RegHalf ( int Destination, int Source );
void X86BreakPoint ( LPCSTR FileName, int LineNumber );
void BsrX86RegToX86Reg ( int Destination, int Source );
void Call_Direct ( void * FunctAddress, char * FunctName );
void Call_Indirect ( void * FunctAddress, char * FunctName );
void CondMoveEqual ( int Destination, int Source );