On 26/03/13 10:06, Hurugalawadi, Naveen wrote:
>>the second "set" in each pattern should have the "=r,rk" constraint
>>rather than just "=r,r".
If the destination operand is stack register, assembler generates error
as follows:-
Error: operand 1 should be an integer register -- `ands sp,x0,x1'
The ands instruction does not support sp in any of the operand as per
the assembler.
adds and subs instruction can use SP as the first operand.
adds x2, sp, 1 -> No Assembler error
subs x3, sp, #1 -> No Assembler error
adds x2, sp, x1 -> No Assembler error
subs x3, sp, x1 -> No Assembler error
adds x3, sp, x1, lsl 3 -> No Assembler error
subs x3, sp, x1, lsl 3 -> No Assembler error
Hence, their implementations are modified to support stack pointer as
the first operand.
Umm, I think Ian meant 'K' rather than 'k', these patterns should be
able to deal with constants in the 2nd operand. The SP is irrelevant here.
/M
