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riscv64imac-unknown-none-elf cross compiler got "error: instruction requires the following: 'M' (Integer Multiplication and Division)" #30

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elliott10 opened this issue Mar 24, 2022 · 1 comment
Open

riscv64imac-unknown-none-elf cross compiler got "error: instruction requires the following: 'M' (Integer Multiplication and Division)" #30

elliott10 opened this issue Mar 24, 2022 · 1 comment

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@elliott10
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When I cross-compile RISCV assembly instructions in file.asm with "rustc 1.60.0-nightly (5e57faa78 2022-01-19) riscv64imac-unknown-none-elf" toolchain.
I got the following error:

error: instruction requires the following: 'M' (Integer Multiplication and Division)
        mul t0, t0, a0
        ^

Please help， How should I avoid this error ?
@sslime336
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Try adding this to your asm file(hope this would work):

.attribute arch, "rv64gc"

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@elliott10 @sslime336