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Revert "params: core, core/vm, miner: 64bit gas instructions (#3514)"

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This reverts commit 8b57c49490.
This commit is contained in:
Jeffrey Wilcke
2017-02-08 13:39:26 +01:00
parent f8f428cc18
commit 57f4e90257
49 changed files with 1118 additions and 1370 deletions
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25
common/math/integer.go
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@ -1,25 +0,0 @@
package math
import gmath "math"
/*
* NOTE: The following methods need to be optimised using either bit checking or asm
*/
// SafeSub returns subtraction result and whether overflow occurred.
func SafeSub(x, y uint64) (uint64, bool) {
return x - y, x < y
}
// SafeAdd returns the result and whether overflow occurred.
func SafeAdd(x, y uint64) (uint64, bool) {
return x + y, y > gmath.MaxUint64-x
}
// SafeMul returns multiplication result and whether overflow occurred.
func SafeMul(x, y uint64) (uint64, bool) {
if x == 0 {
return 0, false
}
return x * y, x != 0 && y != 0 && y > gmath.MaxUint64/x
}