Implement iabs in ISLE (AArch64) (#4399)

* Implement `iabs` in ISLE (AArch64) Converts the existing implementation of `iabs` for AArch64 into ISLE, and fixes support for `iabs` on scalar values. Copyright (c) 2022 Arm Limited. * Improve scalar `iabs` implementation. Also introduces `CSNeg` instruction. Copyright (c) 2022 Arm Limited
2022-07-18 19:12:34 +01:00
parent db7f9ccd2b
commit d792646677
8 changed files with 208 additions and 32 deletions
--- a/cranelift/codegen/src/isa/aarch64/inst/emit_tests.rs
+++ b/cranelift/codegen/src/isa/aarch64/inst/emit_tests.rs
@@ -2129,6 +2129,16 @@ fn test_aarch64_binemit() {
        "8A218E9A",
        "csel x10, x12, x14, hs",
    ));
+    insns.push((
+        Inst::CSNeg {
+            rd: writable_xreg(10),
+            rn: xreg(12),
+            rm: xreg(14),
+            cond: Cond::Hs,
+        },
+        "8A258EDA",
+        "csneg x10, x12, x14, hs",
+    ));
    insns.push((
        Inst::CSet {
            rd: writable_xreg(15),