Handle the special implicit operands for ROL instruction group

flysand7 · Oct 11, 2024 · 5d03dc0 · 5d03dc0
1 parent 08b0f4e
commit 5d03dc0
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diff --git a/src/disasm/disasm.odin b/src/disasm/disasm.odin
@@ -162,6 +162,12 @@ disasm_one :: proc(bytes: []u8) -> (res: Instruction, ok: bool) {
         if opcode == 0xcb || opcode == 0xca {
             flags += {.Far}
         }
+        if opcode == 0xd0 {
+            eop = eop_imm(1, 1)
+        }
+        if opcode == 0xd2 {
+            rx = rx_op(.GPReg, 1, REG_CX)
+        }
     }
     res = Instruction {
         mnemonic = mnemonic,

diff --git a/test/asm/exceptions.asm b/test/asm/exceptions.asm
@@ -10,3 +10,11 @@ jmp 0x1100
 jmp word [0x1101]
 jmp far word [0x1103]
 ; retf ; (printed differently)
+
+; ROL group
+rcl byte [bp], 0x01
+rcl byte [bp], cl
+rcl byte [bp], 0xa0
+rcr byte [bp], 0x01
+rcr byte [bp], cl
+rcr byte [bp], 0xa0