Load ephemeral bounds simultaneously with ldp.

diff --git a/src/vm/arm64/asmhelpers.asm b/src/vm/arm64/asmhelpers.asm
index 2fa7a46..6f71e52 100644 (file)
--- a/src/vm/arm64/asmhelpers.asm
+++ b/src/vm/arm64/asmhelpers.asm
@@ -485,13 +485,14 @@ ShadowUpdateDisabled
 CheckCardTable
         ; Branch to Exit if the reference is not in the Gen0 heap
         ;
-        ldr      x12,  wbs_ephemeral_low
+        adr      x12,  wbs_ephemeral_low
+        ldp      x12,  x16, [x12]
         cbz      x12,  SkipEphemeralCheck
+
         cmp      x15,  x12
         blo      Exit
 
-        ldr      x12,  wbs_ephemeral_high
-        cmp      x15,  x12
+        cmp      x15,  x16
         bhi      Exit
 
 SkipEphemeralCheck