EmbeddedPkg: Extend NvVarStoreFormattedLib LIBRARY_CLASS

[mirror_edk2.git] / StdLib / LibC / Main / Ia32 / fpu_rmode.asm

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