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// Derived from Inferno's libkern/getfcr-amd64.s
// http://code.google.com/p/inferno-os/source/browse/libkern/getfcr-amd64.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.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// 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
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
TEXT ·SetFPControl(SB), 7, $8
// Set new
MOVL p+0(FP), DI
XORL $(0x3F<<7), DI
ANDL $0xFFC0, DI
WAIT
STMXCSR 0(SP)
MOVL 0(SP), AX
ANDL $~0x3F, AX
ORL DI, AX
MOVL AX, 0(SP)
LDMXCSR 0(SP)
RET
TEXT ·GetFPControl(SB), 7, $0
WAIT
STMXCSR 0(SP)
MOVWLZX 0(SP), AX
ANDL $0xFFC0, AX
XORL $(0x3F<<7), AX
MOVL AX, ret+0(FP)
RET
TEXT ·SetFPStatus(SB), $0
MOVL p+0(FP), DI
ANDL $0x3F, DI
WAIT
STMXCSR 0(SP)
MOVL 0(SP), AX
ANDL $~0x3F, AX
ORL DI, AX
MOVL AX, 0(SP)
LDMXCSR 0(SP)
RET
TEXT ·GetFPStatus(SB), $0
WAIT
STMXCSR 0(SP)
MOVL 0(SP), AX
ANDL $0x3F, AX
MOVL AX, ret+0(FP)
RET
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