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[codegen] add intcc conditions for reading carry flag

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Add conditions to IntCC for checking the carry flag (Carry, NotCarry).

Fixes: https://github.com/CraneStation/cranelift/issues/980
This commit is contained in:
Ujjwal Sharma
2019-09-07 00:10:54 +05:30
committed by Dan Gohman
parent 1431ab5201
commit 6e131e5347
7 changed files with 44 additions and 1 deletions
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6
cranelift/codegen/src/isa/mod.rs
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@@ -371,4 +371,10 @@ pub trait TargetIsa: fmt::Display + Sync {
/// Emit a whole function into memory.
fn emit_function_to_memory(&self, func: &ir::Function, sink: &mut binemit::MemoryCodeSink);
/// IntCC condition for Unsigned Addition Overflow (Carry).
fn unsigned_add_overflow_condition(&self) -> ir::condcodes::IntCC;
/// IntCC condition for Unsigned Subtraction Overflow (Borrow/Carry).
fn unsigned_sub_overflow_condition(&self) -> ir::condcodes::IntCC;
}