Reland of Reland of "ARM64: Add NEON support"

test/cctest/test-utils-arm64.h

 // Copyright 2013 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 21 matching lines @@
 #include "test/cctest/cctest.h"
 
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/arm64/utils-arm64.h"
 #include "src/macro-assembler.h"
 
 
 namespace v8 {
 namespace internal {
 
+// Structure representing Q registers in a RegisterDump.
+struct vec128_t {
+  uint64_t l;
+  uint64_t h;
+};
 
 // RegisterDump: Object allowing integer, floating point and flags registers
 // to be saved to itself for future reference.
 class RegisterDump {
  public:
   RegisterDump() : completed_(false) {}
 
   // The Dump method generates code to store a snapshot of the register values.
   // It needs to be able to use the stack temporarily, and requires that the
   // current stack pointer is csp, and is properly aligned.
@@ skipping 13 matching lines @@
   }
 
   inline int64_t xreg(unsigned code) const {
     if (code == kSPRegInternalCode) {
       return spreg();
     }
     CHECK(RegAliasesMatch(code));
     return dump_.x_[code];
   }
 
-  // FPRegister accessors.
+  // VRegister accessors.
   inline uint32_t sreg_bits(unsigned code) const {
     CHECK(FPRegAliasesMatch(code));
     return dump_.s_[code];
   }
 
   inline float sreg(unsigned code) const {
-    return rawbits_to_float(sreg_bits(code));
+    return bit_cast<float>(sreg_bits(code));
   }
 
   inline uint64_t dreg_bits(unsigned code) const {
     CHECK(FPRegAliasesMatch(code));
     return dump_.d_[code];
   }
 
   inline double dreg(unsigned code) const {
-    return rawbits_to_double(dreg_bits(code));
+    return bit_cast<double>(dreg_bits(code));
   }
 
+  inline vec128_t qreg(unsigned code) const { return dump_.q_[code]; }
+
   // Stack pointer accessors.
   inline int64_t spreg() const {
     CHECK(SPRegAliasesMatch());
     return dump_.sp_;
   }
 
   inline int32_t wspreg() const {
     CHECK(SPRegAliasesMatch());
     return static_cast<int32_t>(dump_.wsp_);
   }
@@ skipping 24 matching lines @@
 
   // As RegAliasesMatch, but for the stack pointer.
   bool SPRegAliasesMatch() const {
     CHECK(IsComplete());
     return ((dump_.sp_ & kWRegMask) == dump_.wsp_);
   }
 
   // As RegAliasesMatch, but for floating-point registers.
   bool FPRegAliasesMatch(unsigned code) const {
     CHECK(IsComplete());
-    CHECK(code < kNumberOfFPRegisters);
+    CHECK(code < kNumberOfVRegisters);
     return (dump_.d_[code] & kSRegMask) == dump_.s_[code];
   }
 
   // Store all the dumped elements in a simple struct so the implementation can
   // use offsetof to quickly find the correct field.
   struct dump_t {
     // Core registers.
     uint64_t x_[kNumberOfRegisters];
     uint32_t w_[kNumberOfRegisters];
 
     // Floating-point registers, as raw bits.
-    uint64_t d_[kNumberOfFPRegisters];
-    uint32_t s_[kNumberOfFPRegisters];
+    uint64_t d_[kNumberOfVRegisters];
+    uint32_t s_[kNumberOfVRegisters];
+
+    // Vector registers.
+    vec128_t q_[kNumberOfVRegisters];
 
     // The stack pointer.
     uint64_t sp_;
     uint64_t wsp_;
 
     // NZCV flags, stored in bits 28 to 31.
     // bit[31] : Negative
     // bit[30] : Zero
     // bit[29] : Carry
     // bit[28] : oVerflow
     uint64_t flags_;
   } dump_;
 
   static dump_t for_sizeof();
-  STATIC_ASSERT(sizeof(for_sizeof().d_[0]) == kDRegSize);
-  STATIC_ASSERT(sizeof(for_sizeof().s_[0]) == kSRegSize);
-  STATIC_ASSERT(sizeof(for_sizeof().d_[0]) == kXRegSize);
-  STATIC_ASSERT(sizeof(for_sizeof().s_[0]) == kWRegSize);
-  STATIC_ASSERT(sizeof(for_sizeof().x_[0]) == kXRegSize);
-  STATIC_ASSERT(sizeof(for_sizeof().w_[0]) == kWRegSize);
+  static_assert(kXRegSize == kDRegSize, "X and D registers must be same size.");
+  static_assert(kWRegSize == kSRegSize, "W and S registers must be same size.");
+  static_assert(sizeof(for_sizeof().q_[0]) == kQRegSize,
+                "Array elements must be size of Q register.");
+  static_assert(sizeof(for_sizeof().d_[0]) == kDRegSize,
+                "Array elements must be size of D register.");
+  static_assert(sizeof(for_sizeof().s_[0]) == kSRegSize,
+                "Array elements must be size of S register.");
+  static_assert(sizeof(for_sizeof().x_[0]) == kXRegSize,
+                "Array elements must be size of X register.");
+  static_assert(sizeof(for_sizeof().w_[0]) == kWRegSize,
+                "Array elements must be size of W register.");
 };
 
 // Some of these methods don't use the RegisterDump argument, but they have to
 // accept them so that they can overload those that take register arguments.
 bool Equal32(uint32_t expected, const RegisterDump*, uint32_t result);
 bool Equal64(uint64_t expected, const RegisterDump*, uint64_t result);
 
 bool EqualFP32(float expected, const RegisterDump*, float result);
 bool EqualFP64(double expected, const RegisterDump*, double result);
 
 bool Equal32(uint32_t expected, const RegisterDump* core, const Register& reg);
 bool Equal64(uint64_t expected, const RegisterDump* core, const Register& reg);
 
 bool EqualFP32(float expected, const RegisterDump* core,
-               const FPRegister& fpreg);
+               const VRegister& fpreg);
 bool EqualFP64(double expected, const RegisterDump* core,
-               const FPRegister& fpreg);
+               const VRegister& fpreg);
 
 bool Equal64(const Register& reg0, const RegisterDump* core,
              const Register& reg1);
+bool Equal128(uint64_t expected_h, uint64_t expected_l,
+              const RegisterDump* core, const VRegister& reg);
 
 bool EqualNzcv(uint32_t expected, uint32_t result);
 
 bool EqualRegisters(const RegisterDump* a, const RegisterDump* b);
 
 // Populate the w, x and r arrays with registers from the 'allowed' mask. The
 // r array will be populated with <reg_size>-sized registers,
 //
 // This allows for tests which use large, parameterized blocks of registers
 // (such as the push and pop tests), but where certain registers must be
 // avoided as they are used for other purposes.
 //
 // Any of w, x, or r can be NULL if they are not required.
 //
 // The return value is a RegList indicating which registers were allocated.
 RegList PopulateRegisterArray(Register* w, Register* x, Register* r,
                               int reg_size, int reg_count, RegList allowed);
 
 // As PopulateRegisterArray, but for floating-point registers.
-RegList PopulateFPRegisterArray(FPRegister* s, FPRegister* d, FPRegister* v,
-                                int reg_size, int reg_count, RegList allowed);
+RegList PopulateVRegisterArray(VRegister* s, VRegister* d, VRegister* v,
+                               int reg_size, int reg_count, RegList allowed);
 
 // Ovewrite the contents of the specified registers. This enables tests to
 // check that register contents are written in cases where it's likely that the
 // correct outcome could already be stored in the register.
 //
 // This always overwrites X-sized registers. If tests are operating on W
 // registers, a subsequent write into an aliased W register should clear the
 // top word anyway, so clobbering the full X registers should make tests more
 // rigorous.
 void Clobber(MacroAssembler* masm, RegList reg_list,
              uint64_t const value = 0xfedcba9876543210UL);
 
 // As Clobber, but for FP registers.
 void ClobberFP(MacroAssembler* masm, RegList reg_list,
                double const value = kFP64SignallingNaN);
 
 // As Clobber, but for a CPURegList with either FP or integer registers. When
 // using this method, the clobber value is always the default for the basic
 // Clobber or ClobberFP functions.
 void Clobber(MacroAssembler* masm, CPURegList reg_list);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARM64_TEST_UTILS_ARM64_H_