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 Post subject: how to use mulr64 instruction
PostPosted: Thu Jun 30, 2016 6:04 pm 
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Joined: Wed Aug 27, 2014 1:00 pm
Posts: 12
Andes mulr64 instruction: [ mulr64 rt, ra, rb ] that multiply the unsigned integer contents of two 32-bit registers and write the 64-bit result to an even/odd pair of 32-bit registers.

if you want to use this instruction, you can programming code as below:

#include <stdio.h>
#include <stdlib.h>
long long my_mulr64([long long a, long long b)
{
return a*b;
}

long long my_mul(int a, int b)
{
return a*b;
}

int main(void)
{
long long x, y;
long long z=0x5566;
x=0x24680;
y=0x12345;
z+=x*y;
z+=my_mulr64(x, y);
z+=my_mul(24680+10, 123456789+10);
}

that declare the related variable as long long type.
attached is the project.


Attachments:
hello-mulr64.zip [40.42 KiB]
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