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Side by Side Diff: runtime/vm/simulator_arm64.cc

Issue 609593002: - Remove Isolate::CurrentAddress(). (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 6 years, 2 months ago
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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include <setjmp.h> 5 #include <setjmp.h>
6 #include <stdlib.h> 6 #include <stdlib.h>
7 7
8 #include "vm/globals.h" 8 #include "vm/globals.h"
9 #if defined(TARGET_ARCH_ARM64) 9 #if defined(TARGET_ARCH_ARM64)
10 10
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2437 } 2437 }
2438 set_vregisterd(vd, idx, res); 2438 set_vregisterd(vd, idx, res);
2439 } 2439 }
2440 } 2440 }
2441 } 2441 }
2442 2442
2443 2443
2444 static float arm_reciprocal_sqrt_estimate(float a) { 2444 static float arm_reciprocal_sqrt_estimate(float a) {
2445 // From the ARM Architecture Reference Manual A2-87. 2445 // From the ARM Architecture Reference Manual A2-87.
2446 if (isinf(a) || (fabs(a) >= exp2f(126))) return 0.0; 2446 if (isinf(a) || (fabs(a) >= exp2f(126))) return 0.0;
2447 else if (a == 0.0) return INFINITY; 2447 else if (a == 0.0) return kPosInfinity;
2448 else if (isnan(a)) return a; 2448 else if (isnan(a)) return a;
2449 2449
2450 uint32_t a_bits = bit_cast<uint32_t, float>(a); 2450 uint32_t a_bits = bit_cast<uint32_t, float>(a);
2451 uint64_t scaled; 2451 uint64_t scaled;
2452 if (((a_bits >> 23) & 1) != 0) { 2452 if (((a_bits >> 23) & 1) != 0) {
2453 // scaled = '0 01111111101' : operand<22:0> : Zeros(29) 2453 // scaled = '0 01111111101' : operand<22:0> : Zeros(29)
2454 scaled = (static_cast<uint64_t>(0x3fd) << 52) | 2454 scaled = (static_cast<uint64_t>(0x3fd) << 52) |
2455 ((static_cast<uint64_t>(a_bits) & 0x7fffff) << 29); 2455 ((static_cast<uint64_t>(a_bits) & 0x7fffff) << 29);
2456 } else { 2456 } else {
2457 // scaled = '0 01111111110' : operand<22:0> : Zeros(29) 2457 // scaled = '0 01111111110' : operand<22:0> : Zeros(29)
(...skipping 30 matching lines...) Expand all
2488 // result = 0 : result_exp<7:0> : estimate<51:29> 2488 // result = 0 : result_exp<7:0> : estimate<51:29>
2489 int32_t result_bits = ((result_exp & 0xff) << 23) | 2489 int32_t result_bits = ((result_exp & 0xff) << 23) |
2490 ((bit_cast<uint64_t, double>(estimate) >> 29) & 0x7fffff); 2490 ((bit_cast<uint64_t, double>(estimate) >> 29) & 0x7fffff);
2491 return bit_cast<float, int32_t>(result_bits); 2491 return bit_cast<float, int32_t>(result_bits);
2492 } 2492 }
2493 2493
2494 2494
2495 static float arm_recip_estimate(float a) { 2495 static float arm_recip_estimate(float a) {
2496 // From the ARM Architecture Reference Manual A2-85. 2496 // From the ARM Architecture Reference Manual A2-85.
2497 if (isinf(a) || (fabs(a) >= exp2f(126))) return 0.0; 2497 if (isinf(a) || (fabs(a) >= exp2f(126))) return 0.0;
2498 else if (a == 0.0) return INFINITY; 2498 else if (a == 0.0) return kPosInfinity;
2499 else if (isnan(a)) return a; 2499 else if (isnan(a)) return a;
2500 2500
2501 uint32_t a_bits = bit_cast<uint32_t, float>(a); 2501 uint32_t a_bits = bit_cast<uint32_t, float>(a);
2502 // scaled = '0011 1111 1110' : a<22:0> : Zeros(29) 2502 // scaled = '0011 1111 1110' : a<22:0> : Zeros(29)
2503 uint64_t scaled = (static_cast<uint64_t>(0x3fe) << 52) | 2503 uint64_t scaled = (static_cast<uint64_t>(0x3fe) << 52) |
2504 ((static_cast<uint64_t>(a_bits) & 0x7fffff) << 29); 2504 ((static_cast<uint64_t>(a_bits) & 0x7fffff) << 29);
2505 // result_exp = 253 - UInt(a<30:23>) 2505 // result_exp = 253 - UInt(a<30:23>)
2506 int32_t result_exp = 253 - ((a_bits >> 23) & 0xff); 2506 int32_t result_exp = 253 - ((a_bits >> 23) & 0xff);
2507 ASSERT((result_exp >= 1) && (result_exp <= 252)); 2507 ASSERT((result_exp >= 1) && (result_exp <= 252));
2508 2508
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3057 set_register(NULL, kExceptionObjectReg, bit_cast<int64_t>(raw_exception)); 3057 set_register(NULL, kExceptionObjectReg, bit_cast<int64_t>(raw_exception));
3058 set_register(NULL, kStackTraceObjectReg, bit_cast<int64_t>(raw_stacktrace)); 3058 set_register(NULL, kStackTraceObjectReg, bit_cast<int64_t>(raw_stacktrace));
3059 buf->Longjmp(); 3059 buf->Longjmp();
3060 } 3060 }
3061 3061
3062 } // namespace dart 3062 } // namespace dart
3063 3063
3064 #endif // !defined(HOST_ARCH_ARM64) 3064 #endif // !defined(HOST_ARCH_ARM64)
3065 3065
3066 #endif // defined TARGET_ARCH_ARM64 3066 #endif // defined TARGET_ARCH_ARM64
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