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文件: /usr/share/go-1.23/src/crypto/ecdsa/ecdsa_s390x.s
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// Copyright 2020 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build !purego #include "textflag.h" // func kdsa(fc uint64, params *[4096]byte) (errn uint64) TEXT ·kdsa(SB), NOSPLIT|NOFRAME, $0-24 MOVD fc+0(FP), R0 // function code MOVD params+8(FP), R1 // address parameter block loop: KDSA R0, R4 // compute digital signature authentication BVS loop // branch back if interrupted BGT retry // signing unsuccessful, but retry with new CSPRN BLT error // condition code of 1 indicates a failure success: MOVD $0, errn+16(FP) // return 0 - sign/verify was successful RET error: MOVD $1, errn+16(FP) // return 1 - sign/verify failed RET retry: MOVD $2, errn+16(FP) // return 2 - sign/verify was unsuccessful -- if sign, retry with new RN RET
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