use LONG iota indices for vector shuffle

adinn · adinn · commit 7cdae3fbe1ce · 2026-04-14T09:41:55.000+01:00
diff --git a/src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp
@@ -2415,7 +2415,7 @@ void C2_MacroAssembler::neon_rearrange_hsd(FloatRegister dst, FloatRegister src,
     case T_LONG:
     case T_DOUBLE:
       {
-        int idx = vector_iota_entry_index(bt);
+        int idx = vector_iota_entry_index(T_LONG);
         lea(rscratch1,
             ExternalAddress(StubRoutines::aarch64::vector_iota_indices(idx)));
         ldrq(tmp, rscratch1);

Original file line number	Diff line number	Diff line change
`@@ -2415,7 +2415,7 @@ void C2_MacroAssembler::neon_rearrange_hsd(FloatRegister dst, FloatRegister src,`
`2415`	`2415`	`case T_LONG:`
`2416`	`2416`	`case T_DOUBLE:`
`2417`	`2417`	`{`
`2418`		`- int idx = vector_iota_entry_index(bt);`
	`2418`	`+ int idx = vector_iota_entry_index(T_LONG);`
`2419`	`2419`	`lea(rscratch1,`
`2420`	`2420`	`ExternalAddress(StubRoutines::aarch64::vector_iota_indices(idx)));`
`2421`	`2421`	`ldrq(tmp, rscratch1);`