12.44 __uhasx intrinsic
This intrinsic inserts a
UHASX instruction into the instruction stream generated by the compiler.
you to exchange the halfwords of the second operand, add the high
halfwords and subtract the low halfwords, halving the results.
unsigned int __uhasx(unsigned int
, unsigned int
holds the first operand for the subtraction in the
low halfword, and the first operand for the addition in the high
holds the second operand for the subtraction in
the high halfword, and the second operand for the addition in the
__uhasx intrinsic returns:
The halved subtraction of the high halfword in the
second operand from the low halfword in the first operand.
The halved addition of the high halfword in the
first operand and the low halfword in the second operand.
unsigned int exchange_add_subtract(unsigned int val1, unsigned int val2)
unsigned int res;
res = __uhasx(val1,val2); /* res[15:0] = (val1[15:0] - val2[31:16]) >> 1
res[31:16] = (val1[31:16] + val2[15:0]) >> 1