piwalker/melonDS
1
0
Fork 0
mirror of https://github.com/melonDS-emu/melonDS.git synced 2025-07-23 22:29:47 -06:00
Code Issues Packages Projects Releases Wiki Activity

moar instructions and shit implemented

Browse Source
This commit is contained in:
StapleButter
2016-12-03 17:58:24 +01:00
parent f2858e1c47
commit 1e4086e1b6
10 changed files with 648 additions and 280 deletions
Download Patch File Download Diff File Expand all files Collapse all files

134
ARMInterpreter_ALU.cpp
View File

@ -749,7 +749,57 @@ s32 T_ASR_IMM(ARM* cpu)
return C_S(1);
}
//
s32 T_ADD_REG_(ARM* cpu)
{
u32 a = cpu->R[(cpu->CurInstr >> 3) & 0x7];
u32 b = cpu->R[(cpu->CurInstr >> 6) & 0x7];
u32 res = a + b;
cpu->R[cpu->CurInstr & 0x7] = res;
cpu->SetNZCV(res & 0x80000000,
!res,
CARRY_ADD(a, b),
OVERFLOW_ADD(a, b, res));
return C_S(1);
}
s32 T_SUB_REG_(ARM* cpu)
{
u32 a = cpu->R[(cpu->CurInstr >> 3) & 0x7];
u32 b = cpu->R[(cpu->CurInstr >> 6) & 0x7];
u32 res = a - b;
cpu->R[cpu->CurInstr & 0x7] = res;
cpu->SetNZCV(res & 0x80000000,
!res,
CARRY_SUB(a, b),
OVERFLOW_SUB(a, b, res));
return C_S(1);
}
s32 T_ADD_IMM_(ARM* cpu)
{
u32 a = cpu->R[(cpu->CurInstr >> 3) & 0x7];
u32 b = (cpu->CurInstr >> 6) & 0x7;
u32 res = a + b;
cpu->R[cpu->CurInstr & 0x7] = res;
cpu->SetNZCV(res & 0x80000000,
!res,
CARRY_ADD(a, b),
OVERFLOW_ADD(a, b, res));
return C_S(1);
}
s32 T_SUB_IMM_(ARM* cpu)
{
u32 a = cpu->R[(cpu->CurInstr >> 3) & 0x7];
u32 b = (cpu->CurInstr >> 6) & 0x7;
u32 res = a - b;
cpu->R[cpu->CurInstr & 0x7] = res;
cpu->SetNZCV(res & 0x80000000,
!res,
CARRY_SUB(a, b),
OVERFLOW_SUB(a, b, res));
return C_S(1);
}
s32 T_MOV_IMM(ARM* cpu)
{
@ -997,4 +1047,86 @@ s32 T_MVN_REG(ARM* cpu)
}
s32 T_ADD_HIREG(ARM* cpu)
{
u32 rd = (cpu->CurInstr & 0x7) | ((cpu->CurInstr >> 4) & 0x8);
u32 rs = (cpu->CurInstr >> 3) & 0xF;
u32 a = cpu->R[rd];
u32 b = cpu->R[rs];
if (rd == 15)
{
cpu->JumpTo(a + b);
return C_S(2) + C_N(1);
}
else
{
cpu->R[rd] = a + b;
return C_S(1);
}
}
s32 T_CMP_HIREG(ARM* cpu)
{
u32 rd = (cpu->CurInstr & 0x7) | ((cpu->CurInstr >> 4) & 0x8);
u32 rs = (cpu->CurInstr >> 3) & 0xF;
u32 a = cpu->R[rd];
u32 b = cpu->R[rs];
u32 res = a - b;
cpu->SetNZCV(res & 0x80000000,
!res,
CARRY_SUB(a, b),
OVERFLOW_SUB(a, b, res));
return C_S(1);
}
s32 T_MOV_HIREG(ARM* cpu)
{
u32 rd = (cpu->CurInstr & 0x7) | ((cpu->CurInstr >> 4) & 0x8);
u32 rs = (cpu->CurInstr >> 3) & 0xF;
if (rd == 15)
{
cpu->JumpTo(cpu->R[rs]);
return C_S(2) + C_N(1);
}
else
{
cpu->R[rd] = cpu->R[rs];
return C_S(1);
}
}
s32 T_ADD_PCREL(ARM* cpu)
{
u32 val = cpu->R[15] = ~2;
val += ((cpu->CurInstr & 0xFF) << 2);
cpu->R[(cpu->CurInstr >> 8) & 0x7] = val;
return C_S(1);
}
s32 T_ADD_SPREL(ARM* cpu)
{
u32 val = cpu->R[13];
val += ((cpu->CurInstr & 0xFF) << 2);
cpu->R[(cpu->CurInstr >> 8) & 0x7] = val;
return C_S(1);
}
s32 T_ADD_SP(ARM* cpu)
{
u32 val = cpu->R[13];
if (cpu->CurInstr & (1<<7))
val -= ((cpu->CurInstr & 0x7F) << 2);
else
val += ((cpu->CurInstr & 0x7F) << 2);
cpu->R[13] = val;
return C_S(1);
}
}