diff options
Diffstat (limited to 'code/unix/sys_dosa.s')
| -rwxr-xr-x | code/unix/sys_dosa.s | 230 |
1 files changed, 115 insertions, 115 deletions
diff --git a/code/unix/sys_dosa.s b/code/unix/sys_dosa.s index 4b1aca5..150f666 100755 --- a/code/unix/sys_dosa.s +++ b/code/unix/sys_dosa.s @@ -1,115 +1,115 @@ -/*
-===========================================================================
-Copyright (C) 1999-2005 Id Software, Inc.
-
-This file is part of Quake III Arena source code.
-
-Quake III Arena source code is free software; you can redistribute it
-and/or modify it under the terms of the GNU General Public License as
-published by the Free Software Foundation; either version 2 of the License,
-or (at your option) any later version.
-
-Quake III Arena source code is distributed in the hope that it will be
-useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with Foobar; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-===========================================================================
-*/
-//
-// sys_dosa.s
-// x86 assembly-language DOS-dependent routines.
-
-#include "qasm.h"
-
-
- .data
-
- .align 4
-fpenv:
- .long 0, 0, 0, 0, 0, 0, 0, 0
-
- .text
-
-.globl C(MaskExceptions)
-C(MaskExceptions):
- fnstenv fpenv
- orl $0x3F,fpenv
- fldenv fpenv
-
- ret
-
-#if 0
-.globl C(unmaskexceptions)
-C(unmaskexceptions):
- fnstenv fpenv
- andl $0xFFFFFFE0,fpenv
- fldenv fpenv
-
- ret
-#endif
-
- .data
-
- .align 4
-.globl ceil_cw, single_cw, full_cw, cw, pushed_cw
-ceil_cw: .long 0
-single_cw: .long 0
-full_cw: .long 0
-cw: .long 0
-pushed_cw: .long 0
-
- .text
-
-.globl C(Sys_LowFPPrecision)
-C(Sys_LowFPPrecision):
- fldcw single_cw
-
- ret
-
-.globl C(Sys_HighFPPrecision)
-C(Sys_HighFPPrecision):
- fldcw full_cw
-
- ret
-
-.globl C(Sys_PushFPCW_SetHigh)
-C(Sys_PushFPCW_SetHigh):
- fnstcw pushed_cw
- fldcw full_cw
-
- ret
-
-.globl C(Sys_PopFPCW)
-C(Sys_PopFPCW):
- fldcw pushed_cw
-
- ret
-
-.globl C(Sys_SetFPCW)
-C(Sys_SetFPCW):
- fnstcw cw
- movl cw,%eax
-#if id386
- andb $0xF0,%ah
- orb $0x03,%ah // round mode, 64-bit precision
-#endif
- movl %eax,full_cw
-
-#if id386
- andb $0xF0,%ah
- orb $0x0C,%ah // chop mode, single precision
-#endif
- movl %eax,single_cw
-
-#if id386
- andb $0xF0,%ah
- orb $0x08,%ah // ceil mode, single precision
-#endif
- movl %eax,ceil_cw
-
- ret
-
+/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. + +This file is part of Quake III Arena source code. + +Quake III Arena source code is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 2 of the License, +or (at your option) any later version. + +Quake III Arena source code is distributed in the hope that it will be +useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with Foobar; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +=========================================================================== +*/ +// +// sys_dosa.s +// x86 assembly-language DOS-dependent routines. + +#include "qasm.h" + + + .data + + .align 4 +fpenv: + .long 0, 0, 0, 0, 0, 0, 0, 0 + + .text + +.globl C(MaskExceptions) +C(MaskExceptions): + fnstenv fpenv + orl $0x3F,fpenv + fldenv fpenv + + ret + +#if 0 +.globl C(unmaskexceptions) +C(unmaskexceptions): + fnstenv fpenv + andl $0xFFFFFFE0,fpenv + fldenv fpenv + + ret +#endif + + .data + + .align 4 +.globl ceil_cw, single_cw, full_cw, cw, pushed_cw +ceil_cw: .long 0 +single_cw: .long 0 +full_cw: .long 0 +cw: .long 0 +pushed_cw: .long 0 + + .text + +.globl C(Sys_LowFPPrecision) +C(Sys_LowFPPrecision): + fldcw single_cw + + ret + +.globl C(Sys_HighFPPrecision) +C(Sys_HighFPPrecision): + fldcw full_cw + + ret + +.globl C(Sys_PushFPCW_SetHigh) +C(Sys_PushFPCW_SetHigh): + fnstcw pushed_cw + fldcw full_cw + + ret + +.globl C(Sys_PopFPCW) +C(Sys_PopFPCW): + fldcw pushed_cw + + ret + +.globl C(Sys_SetFPCW) +C(Sys_SetFPCW): + fnstcw cw + movl cw,%eax +#if id386 + andb $0xF0,%ah + orb $0x03,%ah // round mode, 64-bit precision +#endif + movl %eax,full_cw + +#if id386 + andb $0xF0,%ah + orb $0x0C,%ah // chop mode, single precision +#endif + movl %eax,single_cw + +#if id386 + andb $0xF0,%ah + orb $0x08,%ah // ceil mode, single precision +#endif + movl %eax,ceil_cw + + ret + |