Messages in this thread | | | From | Philipp Tomsich <> | Date | Wed, 13 Apr 2022 11:09:07 +0200 | Subject | Re: [PATCH v9 06/12] riscv: prevent compressed instructions in alternatives |
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On Wed, 13 Apr 2022 at 05:03, Heiko Stuebner <heiko@sntech.de> wrote: > > Instructions are opportunistically compressed by the RISC-V assembler > when possible, but in alternatives-blocks both the old and new content > need to be the same size, so having the toolchain do somewhat random > optimizations will cause strange side-effects like > "attempt to move .org backwards" compile-time errors. > > Already a simple "and" used in alternatives assembly will cause these > mismatched code sizes. > > So prevent compressed instructions to be generated in alternatives- > code and use option-push and -pop to only limit this to the relevant > code blocks > > Signed-off-by: Heiko Stuebner <heiko@sntech.de> > Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
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