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Emman 2022-02-24 17:42:05 +08:00
parent d389da6bcb
commit 746ac7eb55
1 changed files with 1 additions and 1 deletions
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sm2/p256_asm.go
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@ -427,7 +427,7 @@ func (p *p256Point) p256StorePoint(r *[16 * 4 * 3]uint64, index int) {
//
// Reference:
// https://github.com/openssl/openssl/blob/master/crypto/ec/ecp_nistputil.c
//
// https://github.com/google/boringssl/blob/master/crypto/fipsmodule/ec/util.c
func boothW5(in uint) (int, int) {
var s uint = ^((in >> 5) - 1) // sets all bits to MSB(in), 'in' seen as 6-bit value
var d uint = (1 << 6) - in - 1 // d = 63 - in, or d = ^in & 0x3f