s390x: Implement bitrev (#4617)

Since we do not have an instruction for this, this is a simple open-coded implementation. Needed by the cg_clif frontend.
2022-08-05 01:24:55 +02:00
parent 42233e8eda
commit f552a53654
5 changed files with 193 additions and 33 deletions
--- a/cranelift/codegen/src/isa/s390x/lower.rs
+++ b/cranelift/codegen/src/isa/s390x/lower.rs
@@ -104,6 +104,7 @@ impl LowerBackend for S390xBackend {
            | Opcode::Bextend
            | Opcode::Bmask
            | Opcode::Bint
+            | Opcode::Bitrev
            | Opcode::Clz
            | Opcode::Cls
            | Opcode::Ctz
@@ -198,8 +199,7 @@ impl LowerBackend for S390xBackend {
                )
            }

-            Opcode::Bitrev
-            | Opcode::ConstAddr
+            Opcode::ConstAddr
            | Opcode::TlsValue
            | Opcode::GetPinnedReg
            | Opcode::SetPinnedReg