[kragen]

i'm probably not a good person to give advice on this, but what i've been doing is installing the cross-compilation gcc environment under debian and qemu-user. this allows me to build statically linked executables and run them as if they were native executables, and also to disassemble the executables and object files with riscv64-linux-gnu-objdump (though it produces incorrect output for instructions like addi and slli, it's good enough to see what's going on)

specifically i installed gcc-riscv64-linux-gnu and qemu-user-binfmt

also i read the risc-v spec and assembly programming manual

i also got some risc-v single-board computers but haven't done anything with them yet

i haven't been doing anything with the v extension, which i think is the most widely supported simd-like extension; though it's not exactly simd, it offers the same kinds of benefits for the same kinds of applications

[brucehoult]

> riscv64-linux-gnu-objdump (though it produces incorrect output for instructions like addi and slli

The assembler accepts either syntax:

    user@starfive:~$ echo add a0,a0,13 \; addi a1,a1,420 | as
    user@starfive:~$ objdump -d a.out
    
    a.out:     file format elf64-littleriscv
    
    
    Disassembly of section .text:
    
    0000000000000000 <.text>:
       0:   00d50513                add     a0,a0,13
       4:   1a458593                add     a1,a1,420

Also, objdump will print them as `addi` if you give the `-Mno-aliases` option.

[kragen]

yeah, i know it accepts it, but that doesn't make it right ;)

thanks for the tip about no-aliases! i had no idea. i don't suppose there's an option to allow me to write arm-ual-style `add a1, a0` instead of `c.add a1, a0` or `add a1, a1, a0`, is there? because in the first case i can't assemble it without rvc, and the second case is annoying

i guess i should write my own assembler instead of whining