[turbofan] Add the TruncateFloat32ToInt32 operator to turbofan.

src/arm/assembler-arm.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 2905 matching lines @@
 
 
 void Assembler::vcvt_f64_u32(const DwVfpRegister dst,
                              const SwVfpRegister src,
                              VFPConversionMode mode,
                              const Condition cond) {
   emit(EncodeVCVT(F64, dst.code(), U32, src.code(), mode, cond));
 }
 
 
+void Assembler::vcvt_s32_f32(const SwVfpRegister dst, const SwVfpRegister src,
+                             VFPConversionMode mode, const Condition cond) {
+  emit(EncodeVCVT(S32, dst.code(), F32, src.code(), mode, cond));
+}
+
+
 void Assembler::vcvt_s32_f64(const SwVfpRegister dst,
                              const DwVfpRegister src,
                              VFPConversionMode mode,
                              const Condition cond) {
   emit(EncodeVCVT(S32, dst.code(), F64, src.code(), mode, cond));
 }
 
 
 void Assembler::vcvt_u32_f64(const SwVfpRegister dst,
                              const DwVfpRegister src,
@@ skipping 1169 matching lines @@
     DCHECK(is_uint12(offset));
     instr_at_put(pc, SetLdrRegisterImmediateOffset(instr, offset));
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM