[sim] Consistent support for C calls with up to 9 args

src/mips/simulator-mips.cc

 // Copyright 2011 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>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #if V8_TARGET_ARCH_MIPS
@@ skipping 2010 matching lines @@
   UNIMPLEMENTED_MIPS();
 }
 
 
 // Calls into the V8 runtime are based on this very simple interface.
 // Note: To be able to return two values from some calls the code in runtime.cc
 // uses the ObjectPair which is essentially two 32-bit values stuffed into a
 // 64-bit value. With the code below we assume that all runtime calls return
 // 64 bits of result. If they don't, the v1 result register contains a bogus
 // value, which is fine because it is caller-saved.
-typedef int64_t (*SimulatorRuntimeCall)(int32_t arg0,
-                                        int32_t arg1,
-                                        int32_t arg2,
-                                        int32_t arg3,
-                                        int32_t arg4,
-                                        int32_t arg5);
+typedef int64_t (*SimulatorRuntimeCall)(int32_t arg0, int32_t arg1,
+                                        int32_t arg2, int32_t arg3,
+                                        int32_t arg4, int32_t arg5,
+                                        int32_t arg6, int32_t arg7,
+                                        int32_t arg8);
 
 typedef ObjectTriple (*SimulatorRuntimeTripleCall)(int32_t arg0, int32_t arg1,
                                                    int32_t arg2, int32_t arg3,
                                                    int32_t arg4);
 
 // These prototypes handle the four types of FP calls.
 typedef int64_t (*SimulatorRuntimeCompareCall)(double darg0, double darg1);
 typedef double (*SimulatorRuntimeFPFPCall)(double darg0, double darg1);
 typedef double (*SimulatorRuntimeFPCall)(double darg0);
 typedef double (*SimulatorRuntimeFPIntCall)(double darg0, int32_t arg0);
@@ skipping 22 matching lines @@
     Redirection* redirection = Redirection::FromSwiInstruction(instr_.instr());
     int32_t arg0 = get_register(a0);
     int32_t arg1 = get_register(a1);
     int32_t arg2 = get_register(a2);
     int32_t arg3 = get_register(a3);
 
     int32_t* stack_pointer = reinterpret_cast<int32_t*>(get_register(sp));
     // Args 4 and 5 are on the stack after the reserved space for args 0..3.
     int32_t arg4 = stack_pointer[4];
     int32_t arg5 = stack_pointer[5];
+    int32_t arg6 = stack_pointer[6];
+    int32_t arg7 = stack_pointer[7];
+    int32_t arg8 = stack_pointer[8];
+    STATIC_ASSERT(kMaxCParameters == 9);
 
     bool fp_call =
          (redirection->type() == ExternalReference::BUILTIN_FP_FP_CALL) ||
          (redirection->type() == ExternalReference::BUILTIN_COMPARE_CALL) ||
          (redirection->type() == ExternalReference::BUILTIN_FP_CALL) ||
          (redirection->type() == ExternalReference::BUILTIN_FP_INT_CALL);
 
     if (!IsMipsSoftFloatABI) {
       // With the hard floating point calling convention, double
       // arguments are passed in FPU registers. Fetch the arguments
@@ skipping 186 matching lines @@
       *sim_result = result;
       set_register(v0, arg0);
     } else {
       DCHECK(redirection->type() == ExternalReference::BUILTIN_CALL ||
              redirection->type() == ExternalReference::BUILTIN_CALL_PAIR);
       SimulatorRuntimeCall target =
                   reinterpret_cast<SimulatorRuntimeCall>(external);
       if (::v8::internal::FLAG_trace_sim) {
         PrintF(
             "Call to host function at %p "
-            "args %08x, %08x, %08x, %08x, %08x, %08x\n",
+            "args %08x, %08x, %08x, %08x, %08x, %08x, %08x, %08x, %08x\n",
             static_cast<void*>(FUNCTION_ADDR(target)), arg0, arg1, arg2, arg3,
-            arg4, arg5);
+            arg4, arg5, arg6, arg7, arg8);
       }
-      int64_t result = target(arg0, arg1, arg2, arg3, arg4, arg5);
+      int64_t result =
+          target(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
       set_register(v0, static_cast<int32_t>(result));
       set_register(v1, static_cast<int32_t>(result >> 32));
     }
     if (::v8::internal::FLAG_trace_sim) {
       PrintF("Returned %08x : %08x\n", get_register(v1), get_register(v0));
     }
     set_register(ra, saved_ra);
     set_pc(get_register(ra));
 
   } else if (func == BREAK && code <= kMaxStopCode) {
@@ skipping 2543 matching lines @@
 
 
 #undef UNSUPPORTED
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_MIPS