sanchayanmaity/gem5
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

ARM: Decode the swp and swpb instructions.

Browse source
This commit is contained in:
Gabe Black 2010-06-02 12:58:05 -05:00
parent e157b1f52a
commit 1344fc2668
2 changed files with 23 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/arch/arm/isa/decoder/arm.isa
View file

@ -58,12 +58,7 @@ format DataOp {
1: decode MISC_OPCODE {
0x9: decode PREPOST {
0: ArmMultAndMultAcc::armMultAndMultAcc();
1: decode PUBWL {
0x10: WarnUnimpl::swp();
0x14: WarnUnimpl::swpb();
0x18: WarnUnimpl::strex();
0x19: WarnUnimpl::ldrex();
}
1: ArmSyncMem::armSyncMem();
}
0xb, 0xd, 0xf: AddrMode3::addrMode3();
}

22
src/arch/arm/isa/formats/mem.isa
View file

@ -213,6 +213,28 @@ def format AddrMode3() {{
decode_block = decode % subs
}};
def format ArmSyncMem() {{
decode_block = '''
{
const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 19, 16);
const IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 15, 12);
const IntRegIndex rt2 = (IntRegIndex)(uint32_t)bits(machInst, 3, 0);
switch (PUBWL) {
case 0x10:
return new Swp(machInst, rt, rt2, rn);
case 0x14:
return new Swpb(machInst, rt, rt2, rn);
case 0x18:
return new WarnUnimplemented("strex", machInst);
case 0x19:
return new WarnUnimplemented("ldrex", machInst);
default:
return new Unknown(machInst);
}
}
'''
}};
def format Thumb32LoadWord() {{
decode = '''
{