commit 18c990ebab4475335a5b94ac6077d3482b6875b9
author Ben Cheng <bccheng@android.com> Mon Jan 24 10:14:29 2011 -0800
committer Ben Cheng <bccheng@android.com> Mon Jan 24 10:14:29 2011 -0800
tree 4d3b43c801f3e106b39b12ea2fa017616e52a7ce
parent d0900d13fb7bb1706aff5205af7e2d6517335bee

Fix push/pop instruction selection and encoding.

1) Thumb 'push' can handle lr and 'pop' can handle pc, so make use of them.
2) Thumb2 push was incorrectly encoded as stmia, which should be stmdb
instead.

None of the above affect the code that we currently ship.

Change-Id: I89ab46b032a3d562355c2cc3bc05fe308ba40957

vm/compiler/codegen/arm/Assemble.c

diff --git a/vm/compiler/codegen/arm/Assemble.c b/vm/compiler/codegen/arm/Assemble.c
index aa61285..577f683 100644
--- a/vm/compiler/codegen/arm/Assemble.c
+++ b/vm/compiler/codegen/arm/Assemble.c
@@ -641,7 +641,7 @@
                  kFmtUnused, -1, -1,
                  IS_UNARY_OP | REG_DEF_SP | REG_USE_SP | REG_DEF_LIST0
                  | IS_LOAD, "pop", "<!0R>", 2),
-    ENCODING_MAP(kThumb2Push,          0xe8ad0000,
+    ENCODING_MAP(kThumb2Push,          0xe92d0000,
                  kFmtBitBlt, 15, 0, kFmtUnused, -1, -1, kFmtUnused, -1, -1,
                  kFmtUnused, -1, -1,
                  IS_UNARY_OP | REG_DEF_SP | REG_USE_SP | REG_USE_LIST0