| Index: src/utils.h
|
| ===================================================================
|
| --- src/utils.h (revision 11420)
|
| +++ src/utils.h (working copy)
|
| @@ -85,32 +85,6 @@
|
| }
|
|
|
|
|
| -// Magic numbers for integer division.
|
| -// These are kind of 2's complement reciprocal of the divisors.
|
| -// Details and proofs can be found in:
|
| -// - Hacker's Delight, Henry S. Warren, Jr.
|
| -// - The PowerPC Compiler Writer’s Guide
|
| -// and probably many others.
|
| -// See details in the implementation of the algorithm in
|
| -// lithium-codegen-arm.cc : LCodeGen::TryEmitSignedIntegerDivisionByConstant().
|
| -struct DivMagicNumbers {
|
| - unsigned M;
|
| - unsigned s;
|
| -};
|
| -
|
| -const DivMagicNumbers InvalidDivMagicNumber= {0, 0};
|
| -const DivMagicNumbers DivMagicNumberFor3 = {0x55555556, 0};
|
| -const DivMagicNumbers DivMagicNumberFor5 = {0x66666667, 1};
|
| -const DivMagicNumbers DivMagicNumberFor7 = {0x92492493, 2};
|
| -const DivMagicNumbers DivMagicNumberFor9 = {0x38e38e39, 1};
|
| -const DivMagicNumbers DivMagicNumberFor11 = {0x2e8ba2e9, 1};
|
| -const DivMagicNumbers DivMagicNumberFor25 = {0x51eb851f, 3};
|
| -const DivMagicNumbers DivMagicNumberFor125 = {0x10624dd3, 3};
|
| -const DivMagicNumbers DivMagicNumberFor625 = {0x68db8bad, 8};
|
| -
|
| -const DivMagicNumbers DivMagicNumberFor(int32_t divisor);
|
| -
|
| -
|
| // The C++ standard leaves the semantics of '>>' undefined for
|
| // negative signed operands. Most implementations do the right thing,
|
| // though.
|
|
|