Reduce register pressure on ARM, ARM64, and MIPS.

runtime/vm/simulator_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
@@ skipping 2124 matching lines @@
       result32 = rn_val32;
     }
   } else if ((instr->Bits(29, 2) == 0) && (instr->Bits(10, 2) == 1)) {
     // Format(instr, "csinc'sf'cond 'rd, 'rn, 'rm");
     result64 = rm_val64 + 1;
     result32 = rm_val32 + 1;
     if (ConditionallyExecute(instr)) {
       result64 = rn_val64;
       result32 = rn_val32;
     }
+  } else if ((instr->Bits(29, 2) == 2) && (instr->Bits(10, 2) == 0)) {
+    // Format(instr, "csinv'sf'cond 'rd, 'rn, 'rm");
+    result64 = ~rm_val64;
+    result32 = ~rm_val32;
+    if (ConditionallyExecute(instr)) {
+      result64 = rn_val64;
+      result32 = rn_val32;
+    }
   } else {
     UnimplementedInstruction(instr);
     return;
   }
 
   if (instr->SFField() == 1) {
     set_register(rd, result64, instr->RdMode());
   } else {
     set_wregister(rd, result32, instr->RdMode());
   }
@@ skipping 881 matching lines @@
   set_register(kExceptionObjectReg, bit_cast<int64_t>(raw_exception));
   set_register(kStackTraceObjectReg, bit_cast<int64_t>(raw_stacktrace));
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM64)
 
 #endif  // defined TARGET_ARCH_ARM64