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

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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

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Post 12 Apr 2006, 22:00
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17279
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.
Post 13 Apr 2006, 01:52
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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

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Post 13 Apr 2006, 07:50
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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)

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Post 20 Apr 2006, 21:28
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