SIMD not supported on AArch64 yet (#22440)

WalterBright · web-flow · commit eaaab15fc86f · 2026-01-23T09:27:08.000+08:00
diff --git a/compiler/src/dmd/target.d b/compiler/src/dmd/target.d
@@ -171,7 +171,7 @@ void addPredefinedGlobalIdentifiers(const ref Target tgt)
     import dmd.cond : VersionCondition;
 
     alias predef = VersionCondition.addPredefinedGlobalIdent;
-    if (tgt.cpu >= CPU.sse2)
+    if ((tgt.isX86_64 || tgt.isX86) && tgt.cpu >= CPU.sse2)
     {
         predef("D_SIMD");
         if (tgt.cpu >= CPU.avx)
@@ -1351,7 +1351,7 @@ extern (C++) struct Target
      */
     extern (D) bool isXmmSupported() @safe
     {
-        return (isX86_64 || isAArch64) || (isX86 && os == Target.OS.OSX);
+        return (isX86_64 /*|| isAArch64*/) || (isX86 && os == Target.OS.OSX);
     }
 
     /**

Original file line number	Diff line number	Diff line change
`@@ -171,7 +171,7 @@ void addPredefinedGlobalIdentifiers(const ref Target tgt)`
`171`	`171`	`import dmd.cond : VersionCondition;`
`172`	`172`
`173`	`173`	`alias predef = VersionCondition.addPredefinedGlobalIdent;`
`174`		`- if (tgt.cpu >= CPU.sse2)`
	`174`	`+ if ((tgt.isX86_64 \|\| tgt.isX86) && tgt.cpu >= CPU.sse2)`
`175`	`175`	`{`
`176`	`176`	`predef("D_SIMD");`
`177`	`177`	`if (tgt.cpu >= CPU.avx)`
`@@ -1351,7 +1351,7 @@ extern (C++) struct Target`
`1351`	`1351`	`*/`
`1352`	`1352`	`extern (D) bool isXmmSupported() @safe`
`1353`	`1353`	`{`
`1354`		`- return (isX86_64 \|\| isAArch64) \|\| (isX86 && os == Target.OS.OSX);`
	`1354`	`+ return (isX86_64 /\|\| isAArch64/) \|\| (isX86 && os == Target.OS.OSX);`
`1355`	`1355`	`}`
`1356`	`1356`
`1357`	`1357`	`/**`