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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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11
pkg/compiler/codegen.go
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@ -940,13 +940,12 @@ func (c *codegen) emitReverse(num int) {
case 2:
emit.Opcode(c.prog.BinWriter, opcode.SWAP)
case 3:
emit.Int(c.prog.BinWriter, 2)
emit.Opcode(c.prog.BinWriter, opcode.XSWAP)
emit.Opcode(c.prog.BinWriter, opcode.REVERSE3)
case 4:
emit.Opcode(c.prog.BinWriter, opcode.REVERSE4)
default:
for i := 1; i < num; i++ {
emit.Int(c.prog.BinWriter, int64(i))
emit.Opcode(c.prog.BinWriter, opcode.ROLL)
}
emit.Int(c.prog.BinWriter, int64(num))
emit.Opcode(c.prog.BinWriter, opcode.REVERSEN)
}
}