On 7/25/2012 12:52 PM, Dmitry Olshansky wrote:
On 25-Jul-12 21:47, Walter Bright wrote:
On 7/25/2012 10:29 AM, Dmitry Olshansky wrote:
Is it possible you could code it up and test it using inline asm?
...
Any tips on which spare registers to use (I guess ecx is no go, as
there is
'this' pointer present) ?
I wouldn't worry about it. EAX is good.
OK. I'm almost there, here is what I have:
//my byte code sets 8-bit to discern code/data
uint c = re.ir[t.pc].code - 128;
//no idea how to code the above in asm
//.code is { return x & mask; } property
asm{
mov EAX, c;
lea EAX, L_jumptable[EAX][EAX*4];
jmp EAX;
}
L_jumptable:
mixin(`asm{`
~ genJumpTable()
~ `} `);
So I have proper table generated and it all goes fine untill I get:
std\regex.d(5118): Error: undefined identifier 'L_jumptable'
I was afraid of that. You may have to approximate it by loading the address of
L_jumptable into a register and adding it in instead of using the addressing
mode. Then, add those extra instructions as dummies into the other path.
