Add support for int-to-char in the optimizing compiler.

- Add support for the int-to-char Dex instruction in the
  optimizing compiler.
- Implement the ARM and Thumb-2 UBFX instructions and add
  tests for them.
- Generate x86, x86-64 and ARM (but not ARM64) code for
  byte to char, short to char, int to char (and char to
  char!) HTypeConversion nodes.
- Add related tests to test/422-type-conversion.

Change-Id: I5cd4c6d86f0f6a966c059715b98db35cc8f9de76

1 files changed, 36 insertions, 0 deletions

diff --git a/compiler/utils/arm/assembler_thumb2_test.cc b/compiler/utils/arm/assembler_thumb2_test.cc
index 57ba0ca5ee..65d6d45296 100644
--- a/compiler/utils/arm/assembler_thumb2_test.cc
+++ b/compiler/utils/arm/assembler_thumb2_test.cc
@@ -120,4 +120,40 @@ TEST_F(AssemblerThumb2Test, Sbfx) {
   DriverStr(expected, "sbfx");
 }
 
+TEST_F(AssemblerThumb2Test, Ubfx) {
+  GetAssembler()->ubfx(arm::R0, arm::R1, 0, 1);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 0, 8);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 0, 16);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 0, 32);
+
+  GetAssembler()->ubfx(arm::R0, arm::R1, 8, 1);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 8, 8);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 8, 16);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 8, 24);
+
+  GetAssembler()->ubfx(arm::R0, arm::R1, 16, 1);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 16, 8);
+  GetAssembler()->ubfx(arm::R0, arm::R1, 16, 16);
+
+  GetAssembler()->ubfx(arm::R0, arm::R1, 31, 1);
+
+  const char* expected =
+      "ubfx r0, r1, #0, #1\n"
+      "ubfx r0, r1, #0, #8\n"
+      "ubfx r0, r1, #0, #16\n"
+      "ubfx r0, r1, #0, #32\n"
+
+      "ubfx r0, r1, #8, #1\n"
+      "ubfx r0, r1, #8, #8\n"
+      "ubfx r0, r1, #8, #16\n"
+      "ubfx r0, r1, #8, #24\n"
+
+      "ubfx r0, r1, #16, #1\n"
+      "ubfx r0, r1, #16, #8\n"
+      "ubfx r0, r1, #16, #16\n"
+
+      "ubfx r0, r1, #31, #1\n";
+  DriverStr(expected, "ubfx");
+}
+
 }  // namespace art