mirror of https://github.com/acidanthera/audk.git
47 lines
1.5 KiB
NASM
47 lines
1.5 KiB
NASM
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;------------------------------------------------------------------------------
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; Return the current FPU rounding mode.
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;
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; MASM implementation of the flt_rounds function by:
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; J.T. Conklin, Apr 4, 1995
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; Public domain.
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;
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; Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; NetBSD: flt_rounds.S,v 1.6 1999/08/23 08:45:09 kleink Exp
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;------------------------------------------------------------------------------
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.686
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.model flat,C
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.code
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;_map BYTE 1 ; round to nearest
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; BYTE 3 ; round to negative infinity
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; BYTE 2 ; round to positive infinity
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; BYTE 0 ; round to zero
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;------------------------------------------------------------------------------
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; int
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; EFIAPI
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; fpu_rmode( void );
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;
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;------------------------------------------------------------------------------
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internal_FPU_rmode PROC
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sub esp, 4 ; Create a local variable for fnstcw
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fnstcw [esp]
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mov eax, [esp]
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shr eax, 10
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and eax, 3
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add esp, 4 ; Delete the local variable
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ret
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internal_FPU_rmode ENDP
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END
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