Extended Description

The armv7 architecture should be able to deal with the armv6t2 instruction set for moving 16 bit values.

// current clang inline assembler bug for: /usr/local/bin/clang -march=armv7 -ccc-host-triple arm-apple-darwin11 -c test.c
#ifdef arm
int test(void) {
int val;
asm (
//"mov %[r0], #​0xff \n\t" // old ARM way for 1023 constant (works)
//"orr %[r0], %[r0], #​0x300 \n\t"
"movw %[r0], #​1023 \n\t" // new ARMv6T2 way for 16 bit wide constants
"movt %[r0], #​0 \n\t"
: [r0] "=r" (val)
);
return val;
}
#endif

Currently this results in an error:
test.c:8:7: error: instruction requires: armv6t2
"movw %[r0], #​1023 \n\t" // new ARMv6T2 way for 16 bit wide constants
^
:1:2: note: instantiated into assembly here
movw r0, #​1023