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riscv64: Fix masking on iabs (#5505)

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* cranelift: Add `iabs.i128` runtest

* riscv64: Fix incorrect extension in iabs

When lowering iabs, we were accidentally comparing the unextended value
this caused the instruction to misbehave with certain top bits.

This commit also adds a zbb lowering that does not use jumps.
This commit is contained in:
Afonso Bordado
2023-01-04 01:37:25 +00:00
committed by GitHub
parent 276bc6ad2e
commit 52ba72f341
8 changed files with 172 additions and 15 deletions
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cranelift/codegen/meta/src/isa/riscv64.rs
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@@ -14,6 +14,7 @@ fn define_settings(_shared: &SettingGroup) -> SettingGroup {
let _has_b = setting.add_bool("has_b", "has extension B?", "", false);
let _has_c = setting.add_bool("has_c", "has extension C?", "", false);
let _has_zbkb = setting.add_bool("has_zbkb", "has extension zbkb?", "", false);
let _has_zbb = setting.add_bool("has_zbb", "has extension zbb?", "", false);
let _has_zicsr = setting.add_bool("has_zicsr", "has extension zicsr?", "", false);
let _has_zifencei = setting.add_bool("has_zifencei", "has extension zifencei?", "", false);