x86_64: Enable fp-reg promotion

Patch introduces 4 register XMM12-15 available for promotion of
fp virtual registers.

Change-Id: I3f89ad07fc8ae98b70f550eada09be7b693ffb67
Signed-off-by: Serguei Katkov <serguei.i.katkov@intel.com>
Signed-off-by: Chao-ying Fu <chao-ying.fu@intel.com>

1 files changed, 13 insertions, 3 deletions

diff --git a/compiler/dex/quick/codegen_util.cc b/compiler/dex/quick/codegen_util.cc
index 5870d22208..048aca3735 100644
--- a/compiler/dex/quick/codegen_util.cc
+++ b/compiler/dex/quick/codegen_util.cc
@@ -1046,9 +1046,19 @@ CompiledMethod* Mir2Lir::GetCompiledMethod() {
     }
     // Push a marker to take place of lr.
     vmap_encoder.PushBackUnsigned(VmapTable::kAdjustedFpMarker);
-    // fp regs already sorted.
-    for (uint32_t i = 0; i < fp_vmap_table_.size(); i++) {
-      vmap_encoder.PushBackUnsigned(fp_vmap_table_[i] + VmapTable::kEntryAdjustment);
+    if (cu_->instruction_set == kThumb2) {
+      // fp regs already sorted.
+      for (uint32_t i = 0; i < fp_vmap_table_.size(); i++) {
+        vmap_encoder.PushBackUnsigned(fp_vmap_table_[i] + VmapTable::kEntryAdjustment);
+      }
+    } else {
+      // For other platforms regs may have been inserted out of order - sort first.
+      std::sort(fp_vmap_table_.begin(), fp_vmap_table_.end());
+      for (size_t i = 0 ; i < fp_vmap_table_.size(); ++i) {
+        // Copy, stripping out the phys register sort key.
+        vmap_encoder.PushBackUnsigned(
+            ~(-1 << VREG_NUM_WIDTH) & (fp_vmap_table_[i] + VmapTable::kEntryAdjustment));
+      }
     }
   } else {
     DCHECK_EQ(POPCOUNT(core_spill_mask_), 0);