id = 625
title = "qemu-hppa floating point POWER function is incorrect"
state = "opened"
created_at = "2021-09-17T08:04:01.442Z"
closed_at = "n/a"
labels = ["target: hppa"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/625"
host-os = "Gentoo Linux"
host-arch = "AMD64"
qemu-version = "6.0.0, also with git 6.1.50 version"
guest-os = "n/a"
guest-arch = "n/a"
description = """The floating point power function produces incorrect values, and possibly stack misshapes as well."""
reproduce = """1. $ hppa1.1-unknown-linux-gnu-gcc pow.c -o pow -lm -static
2. $ qemu-hppa pow
3. the expected result is 10.0 ^ 6.0 = 6000000.0, instead of 403.45"""
additional = """Example C source to reproduce, pow.c:
```
#include <stdio.h>
#include <math.h>
int main()
{
    double base, expo, res;
    base=10.0;
    expo=6.0;
    // res sould be 1e+6
    res = pow(base, expo);
    printf("%.1lf^%.1lf = %.2lf\\n", base, expo, res);
    return 0;
}
```"""