Plan 9 from Bell Labs’s /usr/web/sources/contrib/stallion/root/386/go/src/crypto/sha512/sha512block_s390x.s

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Distributed under the MIT License.
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// Copyright 2016 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.

#include "textflag.h"

// func block(dig *digest, p []byte)
TEXT ·block(SB), NOSPLIT|NOFRAME, $0-32
	MOVBZ  ·useAsm(SB), R4
	LMG    dig+0(FP), R1, R3            // R2 = &p[0], R3 = len(p)
	MOVBZ  $3, R0                       // SHA-512 function code
	CMPBEQ R4, $0, generic

loop:
	WORD $0xB93E0002 // KIMD R2
	BVS  loop        // continue if interrupted
	RET

generic:
	BR ·blockGeneric(SB)

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