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Jonathan Campbell
2020-06-07 03:41:12 -07:00
parent 47be07f0f9
commit f94713352e
1 changed files with 20 additions and 0 deletions
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20
doc-collection/opcodes/x86/8086.dop
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@@ -378,4 +378,24 @@ opcode sequence([0x91,0x97]) name "XCHG" {
reg index = opbyte(0) & 7;
common opcode "XCHG" param(regw,accum);
}
opcode sequence(0x98) name "CBW" if datasize == 16 {
/* AX = sign extended AL */
input AL;
output AX;
}
opcode sequence(0x98) name "CWDE" if datasize == 32 {
/* EAX = sign extended AX */
input AX;
output EAX;
}
opcode sequence(0x99) name "CWD" if datasize == 16 {
/* DX:AX = sign extended AX */
input AX;
output DX,AX;
}
opcode sequence(0x99) name "CDQ" if datasize == 32 {
/* EDX:EAX = sign extended EAX */
input EAX;
output EDX,EAX;
}