Hi Everyone,
I'm working from an ARM guide. The doc provides this code:
$ cat move.c
int main(int argc, char* argv[])
{
int a;
asm volatile("movw %0,%L1 \n"
"movt %0,%H1 \n"
: "=r"(a) : "i"(0x12345678));
return a;
}
It results in:
$ gcc -march=armv7 move.c
move.c: In function ‘main’:
move.c:4:5: error: invalid 'asm': invalid operand for code 'H'
asm volatile("movw %0,%L1 \n"
^
The guide says this about the modifiers:
L - The lowest-numbered register of a register pair, or the low 16
bits of an immediate constant.
H - The highest-numbered register of a register pair, or the high 16
bits of an immediate constant
....
Is this an ARM extension not present in GCC? Or am I doing something wrong?
Jeff
