12.39 __uadd16 intrinsic
This intrinsic inserts a
UADD16 instruction into the instruction stream generated by the compiler.
you to perform two 16-bit unsigned integer additions.
The GE bits in the APSR are set according to the results.
unsigned int __uadd16(unsigned int
, unsigned int
holds the first two halfword summands for each addition
holds the second two halfword summands for each
__uadd16 intrinsic returns:
The addition of the low halfwords in each operand,
in the low halfword of the return value.
The addition of the high halfwords in each operand,
in the high halfword of the return value.
Each bit in APSR.GE is set or cleared for each byte in the
return value, depending on the results of the operation. If
the return value, then:
unsigned int add_halfwords(unsigned int val1, unsigned int val2)
unsigned int res;
res = __uadd16(val1,val2); /* res[15:0] = val1[15:0] + val2[15:0]
res[31:16] = val1[31:16] + val2[31:16]