[request] add opt form x instructions that operate in memory

Index > Compiler Internals > [request] add opt form x instructions that operate in memory

Author

Thread

MAD_DËMON

Joined: 03 Mar 2006
Posts: 23

MAD_DËMON

my request is that must be added an optional form of instructions that load operands from memory
the first character of the prefix size name (qword, dword, word, byte) must be attached just after the instruction name, since it has been seen the syntax of RISC systems (PPC, ARM)

the only assembler that uses this kind of sintax is gas Neutral

movb [mem],imm8 - mov byte [mem],imm8
movw [mem],imm16 - mov word [mem],imm16
movd [mem],imm32 - mov dword [mem],imm32
movq [mem],imm64 - mov qword [mem],imm64

MOVZX

movzb reg16,[mem]
movzw reg32,[mem]
movzd reg64,[mem]

call word [mem]
callw [mem]

call dword [mem]
calld [mem]

pshb imm8 ; pushx or pshx (such as has been seen in arm)
pshw imm16
pshd imm32
pshq imm64

mulb [mem]
mulw [mem]
muld [mem]
mulq [mem]

divb [mem]
divw [mem]
divd [mem]
divq [mem]

outb imm8/dx
outw imm8/dx
outd imm8/dx

_________________
Tah rah rah boom de ay, I blew some guy away, his brains turned into spray, I was paid well that day

12 Apr 2006, 22:00

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 18738
Location: In your JS exploiting you and your system

revolution

You can make this syntax for yourself with equates.

Code:

mulb equ mul byte
mulw equ mul word
...

for the others that cannot be done with equates, then use a macro.

13 Apr 2006, 01:52

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost

because 'movb' is not an instruction but 'mov' is and 'byte' specifies the byte encoding i don't think this is a good feature of an assembler, preprocessor can solve your needs

_________________
redghost.ca

13 Apr 2006, 07:50

MAD_DËMON

Joined: 03 Mar 2006
Posts: 23

MAD_DËMON

RedGhost wrote:

because 'movb' is not an instruction but 'mov' is and 'byte' specifies the byte encoding i don't think this is a good feature of an assembler, preprocessor can solve your needs

"byte" doesn't specifies the byte imm encoding, instead it specifies the Instruction Opcode (C6), and dword & word specifies the same thing, Opcode Prefix operand size (66) and Instr Opcode (C7)

_________________
Tah rah rah boom de ay, I blew some guy away, his brains turned into spray, I was paid well that day

20 Apr 2006, 21:28

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum