Incorrect global/static float array initialization

[fourcolor]

The following code run through rv32emu did not function as expected. I have also tested it with spike, confirming that the issue is specific to rv32emu. This error will lead to an error when running #28 embench-iot minver

• global static float array initialization

#include <stdio.h>
static float test[3] = {-3.0, 0.0, 2.0};
int main()
{
    printf("%f\n", test[0]);
    return 0;
}

compile

riscv32-unknown-elf-gcc test.c -march=rv32imafc -mabi=ilp32 -o test.elf

expect output

-3.000000
inferior exit code 0

actual output

0.000000
inferior exit code 0

Furthermore, I have observed that the same issue exists in the following code.

• global float array initialization

#include <stdio.h>
float test[3] = {-3.0, 0.0, 2.0};
int main()
{
    printf("%f\n", test[0]);
    return 0;
}

• local static float array initialization

#include <stdio.h>
int main()
{
    static float test[3] = {-3.0, 0.0, 2.0};
    printf("%f\n", test[0]);
    return 0;
}

I notice that it only occurred with the global float array initialization and static float array initialization

[fourcolor]

I finally found the reason. Sometimes, 'flw' will be compiled to 'cflw.' However, currently, rv32emu hasn't implemented 'cflw.' I think it's better to have an error message when encountering an unimplemented feature.

[visitorckw]

After the formal support of the F extension, I believe we can now proceed to implement instructions related to RV32FC.