MIPS: [turbofan] Add RoundUint32ToFloat32 operator to Turbofan.

src/mips64/macro-assembler-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
@@ skipping 1634 matching lines @@
   add_d(fd, fd, fd);  // In delay slot.
 
   bind(&msb_clear);
   // Rs < 2^63, we can do simple conversion.
   dmtc1(rs, fd);
   cvt_d_l(fd, fd);
 
   bind(&conversion_done);
 }
 
+void MacroAssembler::Cvt_s_uw(FPURegister fd, FPURegister fs) {
+  // Move the data from fs to t8.
+  mfc1(t8, fs);
+  Cvt_s_uw(fd, t8);
+}
+
+void MacroAssembler::Cvt_s_uw(FPURegister fd, Register rs) {
+  // Convert rs to a FP value in fd.

[Ilija.Pavlovic1, 2016/02/18 08:44:35]

Maybe more descriptive comment as: "Convert unsigned word from rs to a single FP
value in fd."

+  DCHECK(!rs.is(t9));
+  DCHECK(!rs.is(at));
+
+  // Zero extend int32 in rs.
+  Dext(t9, rs, 0, 32);
+  dmtc1(t9, fd);
+  cvt_s_l(fd, fd);
+}
 
 void MacroAssembler::Cvt_s_ul(FPURegister fd, FPURegister fs) {
   // Move the data from fs to t8.
   dmfc1(t8, fs);
   Cvt_s_ul(fd, t8);
 }
 
 
 void MacroAssembler::Cvt_s_ul(FPURegister fd, Register rs) {
   // Convert rs to a FP value in fd.
@@ skipping 4882 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64