Can't execute instruction "fdiv.d" which generated by double div operation

[GUIDINGLI]

Hi,

Recently I use eth ri5cy toolchain to support pulp instruction.

Here is my steps.

1. git clone https://github.com/pulp-platform/ri5cy_gnu_toolchain.git
2. Compile toolchain with: make RISCY_FPU=1
3. Compile C code with command:
   -march=RV32IMFDCXpulpv2 -mhard-float
   detail:
   ri5cy/bin/riscv32-unknown-elf-gcc -c -D__NuttX__ -fno-builtin -Wall -Wstrict-prototypes -Wshadow -Wundef -g -Os -msave-restore -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer -ffunction-sections -fdata-sections -march=RV32IMFDCXpulpv2 -mhard-float fileA.c -o fileA.o

In my code, there is double operation:

#define RND1_CONSTP 999563
static double_t frand1(void)
{
unsigned long randint = 30;
return ((double_t)randint) / ((double_t)RND1_CONSTP);
}

Very simple double operation.
And after compile this C code will generate "fdiv.d" operation.
But my core can't support "fdiv.d", after run this bin in ri5cy core, core will crash and report " Instruction Abort".

So, I remove the 'D', and it become:
-march=RV32IMFCXpulpv2 -mhard-float

But this can't compile pass, meet:
cc1: error: -march=RV32IMFCXpulpv2: single-precision-only is not yet supported

How to resolve this ?

Many thanks.

[haresh-seenivasagan]

Hi did you manage to address this issue ? i am facing the same issue