[wasm][asm.js] Fix and enable several asm.js tests with the new parser.

src/asmjs/asm-parser.cc

 // Copyright 2017 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 "src/asmjs/asm-parser.h"
 
 // Required to get M_E etc. for MSVC.
 // References from STDLIB_MATH_VALUE_LIST in asm-names.h
 #if defined(_WIN32)
 #define _USE_MATH_DEFINES
@@ skipping 837 matching lines @@
       // Store types.
       EXPECT_TOKEN('=');
       double dvalue = 0.0;
       uint64_t uvalue = 0;
       if (Check('-')) {
         if (CheckForDouble(&dvalue)) {
           info->kind = VarKind::kLocal;
           info->type = AsmType::Double();
           info->index = static_cast<uint32_t>(param_count + locals->size());
           locals->push_back(kWasmF64);
-          byte code[] = {WASM_F64(dvalue)};
+          byte code[] = {WASM_F64(-dvalue)};
           current_function_builder_->EmitCode(code, sizeof(code));
           current_function_builder_->EmitSetLocal(info->index);
         } else if (CheckForUnsigned(&uvalue)) {
           if (uvalue > 0x7fffffff) {
             FAIL("Numeric literal out of range");
           }
           info->kind = VarKind::kLocal;
           info->type = AsmType::Int();
           info->index = static_cast<uint32_t>(param_count + locals->size());
           locals->push_back(kWasmI32);
@@ skipping 1497 matching lines @@
       break;
     }
     scanner_.Next();
   }
   scanner_.Seek(start);
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8