tags:

views:

31

answers:

1
Q: 

MUL operator Vs IMUL operator in NASM

Is there any reason why MUL operator is only in single operand form?
IMUL operator can be in three different forms (with one, two or three operands) and this is much more convenient. From the technical point of view I don't see any reason why MUL operator can't be in two/three operands form.

+1  A: 

It's not that NASM doesn't support it - on the CPU, the signed version of the instruction simply supports more variants than the unsigned version.

500 - Internal Server Error  2010-10-18 21:23:58

related questions

Asm IDE recommendations
Windows/DOS Assembly - Simple Math
Executing a flat binary file under Linux
gas vs. nasm: which assembler produces the best code?
NASM Printing Out Time - Beginner Help
Enable L1 cache as Ring 0
Disable L2/L1 caches
Windows API calls from assembly while minimizing program size
Why does the mov instruction have to be used this way?
how to access sound card in linux using nasm
How to load kernel into memory from CD-ROM using Assembly (NASM)
Basic yet thorough assembly tutorial (linux)?
How do we shift from protected mode to real mode in Linux 2.6?
Calling assembly routine in objective C
What are some good x86 assembly language resources?
How to translate NASM "push byte" to GAS syntax?
How do I compile DOS programs on Debian?
Which x86 assembler do you use?
A Simple Assembly Input Question
dollar-terminated strings
What is the best resource for learning (N)ASM?
Learning x64 on a linux system
Why does this NASM code print my environment variables?
Unable to run assembly program
Mixing 32 bit and 16 bit code with nasm