cranelift x64: use the POPCNT instruction for Popcount when it's available;

2021-01-28 12:16:46 +01:00
parent 6bf6612d96
commit 2275519cb1
4 changed files with 102 additions and 12 deletions
--- a/cranelift/codegen/src/isa/x64/inst/args.rs
+++ b/cranelift/codegen/src/isa/x64/inst/args.rs
@@ -406,6 +406,8 @@ pub enum UnaryRmROpcode {
    Lzcnt,
    /// Counts trailing zeroes (Trailing Zero CouNT).
    Tzcnt,
+    /// Counts the number of ones (POPulation CouNT).
+    Popcnt,
 }

 impl fmt::Debug for UnaryRmROpcode {
@@ -415,6 +417,7 @@ impl fmt::Debug for UnaryRmROpcode {
            UnaryRmROpcode::Bsf => write!(fmt, "bsf"),
            UnaryRmROpcode::Lzcnt => write!(fmt, "lzcnt"),
            UnaryRmROpcode::Tzcnt => write!(fmt, "tzcnt"),
+            UnaryRmROpcode::Popcnt => write!(fmt, "popcnt"),
        }
    }
 }