I generaly use fasmg for write high performance functions. So sometimes I have to use "seldom used instructions". I've noticed that instruction "prefetchw" have no macro in "fasmg package". I wrote my own based on macros for "prefetcht* instructions:
macro prefetchw? src*
x86.parse_operand @src,src
if @src.type = 'mem'
if @src.size and not 1
err 'invalid operand size'
end if
x86.store_instruction <0Fh,0Dh>,@src,1
else
err 'invalid operand'
end if
end macro
Also I found that "movnti" macro works only with 32 bits registers. I try to improve this macro to use also 64 bits registers:
macro movnti? dest*,src*
x86.parse_operand @dest,dest
x86.parse_operand @src,src
local size
if @dest.size = 0 & @src.size = 0
err 'operand size not specified'
else if @dest.size <> 0 & @src.size <> 0 & @dest.size <> @src.size
err 'operand sizes do not match'
else
size = @dest.size or @src.size
end if
if @dest.type = 'mem' & @src.type = 'reg'
if size <> 4 & size <> 8
err 'invalid operand size'
end if
x86.select_operand_prefix @dest,size
x86.store_instruction <0Fh,0C3h>,@dest,@src.rm
else
err 'invalid combination of operands'
end if
end macro
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> Macroinstructions > [fasmg][x86] Missing/incomplete instructions macros
01 Jul 2019, 18:54