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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | 27 |
| 28 #include <stdarg.h> | 28 #include <stdarg.h> |
| 29 #include <limits.h> | 29 #include <limits.h> |
| 30 #include <cmath> | 30 #include <cmath> |
| 31 | 31 |
| 32 #include "../include/v8stdint.h" | 32 #include "../include/v8stdint.h" |
| 33 #include "globals.h" | 33 #include "base/globals.h" |
| 34 #include "checks.h" | 34 #include "checks.h" |
| 35 #include "cached-powers.h" | 35 #include "cached-powers.h" |
| 36 | 36 |
| 37 namespace v8 { | 37 namespace v8 { |
| 38 namespace internal { | 38 namespace internal { |
| 39 | 39 |
| 40 struct CachedPower { | 40 struct CachedPower { |
| 41 uint64_t significand; | 41 uint64_t significand; |
| 42 int16_t binary_exponent; | 42 int16_t binary_exponent; |
| 43 int16_t decimal_exponent; | 43 int16_t decimal_exponent; |
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| 173 int index = | 173 int index = |
| 174 (requested_exponent + kCachedPowersOffset) / kDecimalExponentDistance; | 174 (requested_exponent + kCachedPowersOffset) / kDecimalExponentDistance; |
| 175 CachedPower cached_power = kCachedPowers[index]; | 175 CachedPower cached_power = kCachedPowers[index]; |
| 176 *power = DiyFp(cached_power.significand, cached_power.binary_exponent); | 176 *power = DiyFp(cached_power.significand, cached_power.binary_exponent); |
| 177 *found_exponent = cached_power.decimal_exponent; | 177 *found_exponent = cached_power.decimal_exponent; |
| 178 ASSERT(*found_exponent <= requested_exponent); | 178 ASSERT(*found_exponent <= requested_exponent); |
| 179 ASSERT(requested_exponent < *found_exponent + kDecimalExponentDistance); | 179 ASSERT(requested_exponent < *found_exponent + kDecimalExponentDistance); |
| 180 } | 180 } |
| 181 | 181 |
| 182 } } // namespace v8::internal | 182 } } // namespace v8::internal |
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