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vm: implement REVERSE* opcodes

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Use new opcodes in the compiler instead of XSWAP/ROLL.
This commit is contained in:
Evgenii Stratonikov 2020-05-06 12:12:29 +03:00
parent c8a1188ee1
commit d18199ce42
6 changed files with 161 additions and 81 deletions
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12
pkg/vm/vm.go
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@ -732,6 +732,18 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
panic(err.Error())
}
case opcode.REVERSE3, opcode.REVERSE4, opcode.REVERSEN:
n := 3
switch op {
case opcode.REVERSE4:
n = 4
case opcode.REVERSEN:
n = int(v.estack.Pop().BigInt().Int64())
}
if err := v.estack.ReverseTop(n); err != nil {
panic(err.Error())
}
// Bit operations.
case opcode.INVERT:
// inplace