x64: Migrate brff and I128 branching instructions to ISLE (#4599)

https://github.com/bytecodealliance/wasmtime/pull/4599

cranelift/codegen/src/isa/x64/lower/isle.rs

@@ -14,7 +14,7 @@ use crate::ir::LibCall;
 use crate::isa::x64::lower::emit_vm_call;
 use crate::{
     ir::{
-        condcodes::{FloatCC, IntCC},
+        condcodes::{CondCode, FloatCC, IntCC},
         immediates::*,
         types::*,
         Inst, InstructionData, MemFlags, Opcode, TrapCode, Value, ValueList,
@@ -590,6 +590,20 @@ where
         cc.invert()
     }
 
+    #[inline]
+    fn cc_nz_or_z(&mut self, cc: &CC) -> Option<CC> {
+        match cc {
+            CC::Z => Some(*cc),
+            CC::NZ => Some(*cc),
+            _ => None,
+        }
+    }
+
+    #[inline]
+    fn floatcc_inverse(&mut self, cc: &FloatCC) -> FloatCC {
+        cc.inverse()
+    }
+
     #[inline]
     fn sum_extend_fits_in_32_bits(
         &mut self,