29.2.60 __builtin_muluu

Description

Computes the product p0 x p1. Function arguments are unsigned integers, and the function result is an unsigned long integer. The command-line option -Wconversions can be used to detect unexpected sign conversions. This function supports the full range of addressing modes of the instruction, including immediate mode for operand p1.

For example:

 volatile register int16_t a asm("A");
 uint32_t result;
 const uint16_t p0, p1;

 result = __builtin_muluu(p0,p1);
 a = __builtin_muluu(p0,p1);

Prototype

uint32_t __builtin_muluu(const uint16_t p0, const uint16_t p1);

Arguments

p0 – multiplicand

p1 – multiplier

Return Value

Returns the signed long integer value of the product p0 x p1. The value can either be returned into a variable of type unsigned long or directly into an accumulator register.

Machine Instruction

mul.uu