Port inlined in-object property stores to ARM.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
===================================================================
--- src/arm/assembler-arm.cc	(revision 5106)
+++ src/arm/assembler-arm.cc	(working copy)
@@ -445,6 +445,37 @@
 }
 
 
+bool Assembler::IsStrRegisterImmediate(Instr instr) {

[Rodolph Perfetta, 2010/07/21 14:51:15]

Should the name indicate this only returns true for word store? (not byte or
halfword)

[Mads Ager (chromium), 2010/07/22 07:29:54]

We could do that. I chose this name because it matches the assembler name for
the 'str' instruction. We have 'strb' and 'strh' for byte and halfword and could
add IsStrb and IsStrh methods as well if needed.

+  return (instr & (B27 | B26 | B25 | B22 | B20)) == B26;
+}
+
+
+Instr Assembler::SetStrRegisterImmediateOffset(Instr instr, int offset) {
+  ASSERT(IsStrRegisterImmediate(instr));
+  bool positive = offset >= 0;
+  if (!positive) offset = -offset;
+  ASSERT(is_uint12(offset));
+  // Set bit indicating whether the offset should be added.
+  instr = (instr & ~B23) | (positive ? B23 : 0);
+  // Set the actual offset.
+  return (instr & ~Off12Mask) | offset;
+}
+
+
+bool Assembler::IsAddRegisterImmediate(Instr instr) {
+  return (instr & (B27 | B26 | B25 | B24 | B23 | B22 | B21)) == (B25 | B23);
+}
+
+
+Instr Assembler::SetAddRegisterImmediateOffset(Instr instr, int offset) {
+  ASSERT(IsAddRegisterImmediate(instr));
+  ASSERT(offset >= 0);
+  ASSERT(is_uint12(offset));
+  // Set the offset.
+  return (instr & ~Off12Mask) | offset;
+}
+
+
 Register Assembler::GetRd(Instr instr) {
   Register reg;
   reg.code_ = ((instr & kRdMask) >> kRdShift);