Skip r1 on arm if first parameter is a long.

Change-Id: I16d927ee0a0b55031ade4c92c0095fd74e18ed5b

1 files changed, 7 insertions, 0 deletions

diff --git a/runtime/arch/arm/quick_entrypoints_cc_arm.cc b/runtime/arch/arm/quick_entrypoints_cc_arm.cc
index e21e6c1..a3acd7e 100644
--- a/runtime/arch/arm/quick_entrypoints_cc_arm.cc
+++ b/runtime/arch/arm/quick_entrypoints_cc_arm.cc
@@ -75,7 +75,14 @@ static void quick_invoke_reg_setup(mirror::ArtMethod* method, uint32_t* args, ui
         }
         break;
       case 'J':
+        if (gpr_index == 1 && !kArm32QuickCodeUseSoftFloat) {
+          // Don't use r1-r2 as a register pair, move to r2-r3 instead.
+          gpr_index++;
+        }
         if (gpr_index < arraysize(core_reg_args)) {
+          // Note that we don't need to do this if two registers are not available
+          // when !kArm32QuickCodeUseSoftFloat. We do it anyway to leave this
+          // code simple.
           core_reg_args[gpr_index++] = args[arg_index];
         }
         ++arg_index;