From ec13743da80a80c1817cf6660c28917fc28846bc Mon Sep 17 00:00:00 2001
From: buzbee <buzbee@google.com>
Date: Tue, 13 Nov 2012 12:13:16 -0800
Subject: Revert "Revert "Refactor codegen resource masks""

This reverts commit 4b39c9f1b77ff32cf5760e6bf77c189678e2c9a6.

The problem with the original commit was failure to widen a
couple of local variables to hold the newly widenened to 64-bits
EncodingMap flag field - thus we lost some high-order resource
attributes and broke instruction scheduling for x86.

Change-Id: I04d7caf79e2cc802c39369ca04666629218ccaea
---
 src/compiler/codegen/x86/ArchUtility.cc | 42 +++++++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

(limited to 'src/compiler/codegen/x86/ArchUtility.cc')

diff --git a/src/compiler/codegen/x86/ArchUtility.cc b/src/compiler/codegen/x86/ArchUtility.cc
index 4c28b35e03..953ce4a899 100644
--- a/src/compiler/codegen/x86/ArchUtility.cc
+++ b/src/compiler/codegen/x86/ArchUtility.cc
@@ -22,12 +22,50 @@
 
 namespace art {
 
+/*
+ * Decode the register id.
+ */
+u8 getRegMaskCommon(CompilationUnit* cUnit, int reg)
+{
+  u8 seed;
+  int shift;
+  int regId;
+
+  regId = reg & 0xf;
+  /* Double registers in x86 are just a single FP register */
+  seed = 1;
+  /* FP register starts at bit position 16 */
+  shift = FPREG(reg) ? kX86FPReg0 : 0;
+  /* Expand the double register id into single offset */
+  shift += regId;
+  return (seed << shift);
+}
+
+uint64_t getPCUseDefEncoding()
+{
+  /*
+   * FIXME: might make sense to use a virtual resource encoding bit for pc.  Might be
+   * able to clean up some of the x86/Arm_Mips differences
+   */
+  LOG(FATAL) << "Unexpected call to getPCUseDefEncoding for x86";
+  return 0ULL;
+}
+
 void setupTargetResourceMasks(CompilationUnit* cUnit, LIR* lir)
 {
   DCHECK_EQ(cUnit->instructionSet, kX86);
 
   // X86-specific resource map setup here.
-  int flags = EncodingMap[lir->opcode].flags;
+  uint64_t flags = EncodingMap[lir->opcode].flags;
+
+  if (flags & REG_USE_SP) {
+    lir->useMask |= ENCODE_X86_REG_SP;
+  }
+
+  if (flags & REG_DEF_SP) {
+    lir->defMask |= ENCODE_X86_REG_SP;
+  }
+
   if (flags & REG_DEFA) {
     oatSetupRegMask(cUnit, &lir->defMask, rAX);
   }
@@ -147,7 +185,7 @@ void oatDumpResourceMask(LIR *lir, u8 mask, const char *prefix)
     char num[8];
     int i;
 
-    for (i = 0; i < kRegEnd; i++) {
+    for (i = 0; i < kX86RegEnd; i++) {
       if (mask & (1ULL << i)) {
         sprintf(num, "%d ", i);
         strcat(buf, num);
-- 
cgit v1.2.3-59-g8ed1b