akkartik
/
mu
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

4047

This commit is contained in:
Kartik K. Agaram 2017-10-12 22:57:55 -07:00
parent 6c112cbc14
commit d98c813870
1 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
subx/011add.cc
View File

@ -168,3 +168,25 @@ case 5: {
+run: effective address is mem at address 0x60 (reg 3)
+run: subop subtract
+run: storing 0x00000009
//:
:(scenario sub_r32_from_mem_at_r32)
% Reg[0].i = 0x60;
% Mem.at(0x60) = 10;
% Reg[3].i = 1;
# op ModRM SIB displacement immediate
29 18 # subtract EBX (reg 3) from *EAX (reg 0)
+run: subtract reg 3 from effective address
+run: effective address is mem at address 0x60 (reg 0)
+run: storing 0x00000009
:(before "End Single-Byte Opcodes")
case 0x29: { // subtract r32 from r/m32
uint8_t modrm = next();
uint8_t arg2 = (modrm>>3)&0x7;
trace(2, "run") << "subtract reg " << NUM(arg2) << " from effective address" << end();
int32_t* arg1 = effective_address(modrm);
BINARY_ARITHMETIC_OP(-, *arg1, Reg[arg2].i);
break;
}