ISLE: port iabs to ISLE for x64

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

@@ -8,6 +8,7 @@ use super::{
     is_mergeable_load, lower_to_amode, AluRmiROpcode, Inst as MInst, OperandSize, Reg, RegMemImm,
 };
 use crate::isa::x64::inst::args::SyntheticAmode;
+use crate::isa::x64::inst::regs;
 use crate::isa::x64::settings as x64_settings;
 use crate::machinst::isle::*;
 use crate::{
@@ -145,6 +146,15 @@ where
         }
     }
 
+    #[inline]
+    fn avx512f_enabled(&mut self, _: Type) -> Option<()> {
+        if self.isa_flags.use_avx512f_simd() {
+            Some(())
+        } else {
+            None
+        }
+    }
+
     #[inline]
     fn imm8_from_value(&mut self, val: Value) -> Option<Imm8Reg> {
         let inst = self.lower_ctx.dfg().value_def(val).inst()?;
@@ -214,6 +224,11 @@ where
         // shifted into bits 5:6).
         0b00_00_00_00 | lane << 4
     }
+
+    #[inline]
+    fn xmm0(&mut self) -> WritableReg {
+        WritableReg::from_reg(regs::xmm0())
+    }
 }
 
 #[inline]

cranelift/codegen/src/isa/x64/lower/isle/generated_code.manifest

@@ -1,4 +1,4 @@
 src/clif.isle 9c0563583e5500de00ec5e226edc0547ac3ea789c8d76f1da0401c80ec619320fdc9a6f17fd76bbcac74a5894f85385c1f51c900c2b83bc9906d03d0f29bf5cb
 src/prelude.isle e4933f2bcb6cd9e00cb6dc0c47c43d096d0c4e37468af17a38fad8906b864d975e0a8b98d15c6a5e2bccf255ec2ced2466991c3405533e9cafefbf4d9ac46823
-src/isa/x64/inst.isle e4a0657406056a4cf116fe125e91d16377b602e0b41edd6628cbb7259b0fc2aa6b0482ffd33f00d63d68cf3546f188705877309d43eba5e75abd0f38a52a79b2
-src/isa/x64/lower.isle e51b7a67343dba342a43b3c9e4b9ed7df9b2c66a677018acf7054ba48c27e4e93a4421fd892b9bf7c0e5b790bcfafab7cb3e93ce2b8206c04d456918d2ad0b5a
+src/isa/x64/inst.isle 12dc8fa43cbba6e9c5cf46a2472e2754abfe33b7fd38f80e271afa3f6c002efad7a4202c8f00ff27d5e6176de8fec97e1887d382cbd4ef06eaac177a0b5992e3
+src/isa/x64/lower.isle 333e1be62f602bb835a3cebc3299290a3d386438e9190d2db219263d974e097bfc3f1afdaac9401853806d21d548cad70bab2ffbc3b1cf5c3bebdd971a961f70