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fix code comment

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Jonny Rhea 2026-03-02 18:51:31 -06:00 committed by GitHub
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commit 095326d6e0
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1 changed files with 2 additions and 2 deletions
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4
core/vm/instructions.go
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@ -957,8 +957,8 @@ func decodeSingle(x byte) int {
// decodePair decodes the immediate operand of a backward-compatible EXCHANGE
// instruction (EIP-8024) into stack indices (n, m) where 1 <= n < m
// and n + m <= 30. There are 210 such valid pairs, encoded into a single byte
// that avoids the forbidden range [91, 127].
// and n + m <= 30. The forbidden byte range [82, 127] removes 46 values from
// the 256 possible immediates, leaving exactly 210 usable bytes.
func decodePair(x byte) (int, int) {
// XOR with 143 remaps the forbidden bytes [82, 127] to an unused corner
// of the 16x16 grid below.