Reset trunk to 3.24.35.4

test/cctest/test-utils-a64.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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_A64_TEST_UTILS_A64_H_
-#define V8_A64_TEST_UTILS_A64_H_
-
-#include "v8.h"
-
-#include "macro-assembler.h"
-#include "a64/macro-assembler-a64.h"
-#include "a64/utils-a64.h"
-#include "cctest.h"
-
-
-using namespace v8::internal;
-
-
-// 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.
-  //
-  // The dumping code is generated though the given MacroAssembler. No registers
-  // are corrupted in the process, but the stack is used briefly. The flags will
-  // be corrupted during this call.
-  void Dump(MacroAssembler* assm);
-
-  // Register accessors.
-  inline int32_t wreg(unsigned code) const {
-    if (code == kSPRegInternalCode) {
-      return wspreg();
-    }
-    ASSERT(RegAliasesMatch(code));
-    return dump_.w_[code];
-  }
-
-  inline int64_t xreg(unsigned code) const {
-    if (code == kSPRegInternalCode) {
-      return spreg();
-    }
-    ASSERT(RegAliasesMatch(code));
-    return dump_.x_[code];
-  }
-
-  // FPRegister accessors.
-  inline uint32_t sreg_bits(unsigned code) const {
-    ASSERT(FPRegAliasesMatch(code));
-    return dump_.s_[code];
-  }
-
-  inline float sreg(unsigned code) const {
-    return rawbits_to_float(sreg_bits(code));
-  }
-
-  inline uint64_t dreg_bits(unsigned code) const {
-    ASSERT(FPRegAliasesMatch(code));
-    return dump_.d_[code];
-  }
-
-  inline double dreg(unsigned code) const {
-    return rawbits_to_double(dreg_bits(code));
-  }
-
-  // Stack pointer accessors.
-  inline int64_t spreg() const {
-    ASSERT(SPRegAliasesMatch());
-    return dump_.sp_;
-  }
-
-  inline int64_t wspreg() const {
-    ASSERT(SPRegAliasesMatch());
-    return dump_.wsp_;
-  }
-
-  // Flags accessors.
-  inline uint64_t flags_nzcv() const {
-    ASSERT(IsComplete());
-    ASSERT((dump_.flags_ & ~Flags_mask) == 0);
-    return dump_.flags_ & Flags_mask;
-  }
-
-  inline bool IsComplete() const {
-    return completed_;
-  }
-
- private:
-  // Indicate whether the dump operation has been completed.
-  bool completed_;
-
-  // Check that the lower 32 bits of x<code> exactly match the 32 bits of
-  // w<code>. A failure of this test most likely represents a failure in the
-  // ::Dump method, or a failure in the simulator.
-  bool RegAliasesMatch(unsigned code) const {
-    ASSERT(IsComplete());
-    ASSERT(code < kNumberOfRegisters);
-    return ((dump_.x_[code] & kWRegMask) == dump_.w_[code]);
-  }
-
-  // As RegAliasesMatch, but for the stack pointer.
-  bool SPRegAliasesMatch() const {
-    ASSERT(IsComplete());
-    return ((dump_.sp_ & kWRegMask) == dump_.wsp_);
-  }
-
-  // As RegAliasesMatch, but for floating-point registers.
-  bool FPRegAliasesMatch(unsigned code) const {
-    ASSERT(IsComplete());
-    ASSERT(code < kNumberOfFPRegisters);
-    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];
-
-    // 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]) == kDRegSizeInBytes);
-  STATIC_ASSERT(sizeof(for_sizeof().s_[0]) == kSRegSizeInBytes);
-  STATIC_ASSERT(sizeof(for_sizeof().d_[0]) == kXRegSizeInBytes);
-  STATIC_ASSERT(sizeof(for_sizeof().s_[0]) == kWRegSizeInBytes);
-  STATIC_ASSERT(sizeof(for_sizeof().x_[0]) == kXRegSizeInBytes);
-  STATIC_ASSERT(sizeof(for_sizeof().w_[0]) == kWRegSizeInBytes);
-};
-
-// 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);
-bool EqualFP64(double expected, const RegisterDump* core,
-               const FPRegister& fpreg);
-
-bool Equal64(const Register& reg0, const RegisterDump* core,
-             const Register& reg1);
-
-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);
-
-// 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);
-
-#endif  // V8_A64_TEST_UTILS_A64_H_