// Inferno's libkern/vlop-386.s
// http://code.google.com/p/inferno-os/source/browse/libkern/vlop-386.s
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved.
// Portions Copyright 2009 The Go Authors. All rights reserved.
//
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// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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#include "../../cmd/ld/textflag.h"
/*
* C runtime for 64-bit divide.
*/
// _mul64x32(r *uint64, a uint64, b uint32)
// sets *r = low 64 bits of 96-bit product a*b; returns high 32 bits.
TEXT _mul64by32(SB), NOSPLIT, $0
MOVL r+0(FP), CX
MOVL a+4(FP), AX
MULL b+12(FP)
MOVL AX, 0(CX)
MOVL DX, BX
MOVL a+8(FP), AX
MULL b+12(FP)
ADDL AX, BX
ADCL $0, DX
MOVL BX, 4(CX)
MOVL DX, AX
RET
TEXT _div64by32(SB), NOSPLIT, $0
MOVL r+12(FP), CX
MOVL a+0(FP), AX
MOVL a+4(FP), DX
DIVL b+8(FP)
MOVL DX, 0(CX)
RET