[fpc-pascal] Is RV32I instruction set for RISC-V (embedded) supported?

[Bernd Mueller]

Hello,

I would like to use fpc to program a FPGA softcore RISC-V cpu. The
softcore has the RV32I instruction set implemented.

I modified the Makefile in rtl/embedded, so that the known SUBARCH
rv32imac replaces the option -Cprv32imac with now -Cprv32i.  But this
leads to the following error message, when I try to compile the
crosscompiler/rtl:

/home/bernd/fpc/fpc331/48875/src/compiler/ppcrossrv32 -Ur -Cprv32i
-Tembedded -Priscv32 -XPriscv32-embedded- -Ur -Xs -O2 -n -Fi../inc
-Fi../riscv32 -FE.
-FU/home/bernd/fpc/fpc331/48875/src/rtl/units/riscv32-embedded
-Fl/home/bernd/riscv/riscv_2008/lib/gcc/riscv64-unknown-elf/10.1.0/rv64imafdc/lp64d
-driscv32 -dRELEASE -al  -Us -Sg system.pp @system.cfg
/home/bernd/fpc/fpc331/48875/src/rtl/units/riscv32-embedded/system.s:
Assembler messages:
/home/bernd/fpc/fpc331/48875/src/rtl/units/riscv32-embedded/system.s:39578:
Error: unrecognized opcode `mul x11,x11,x10'

Is this expected, since RV32I is not supported, or should this work?

Regards, Bernd.