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| author | Travis Bradshaw <travis.bradshaw@idsoftware.com> | 2012-01-31 14:32:09 -0600 |
|---|---|---|
| committer | Travis Bradshaw <travis.bradshaw@idsoftware.com> | 2012-01-31 14:32:09 -0600 |
| commit | 0023db327bc1db00068284b70e1db45857aeee35 (patch) | |
| tree | 01dd8366d20bd674741cfe8ceb069d82a2e33973 /WinQuake/sys_wina.s | |
| download | quake-pum-0023db327bc1db00068284b70e1db45857aeee35.tar.gz | |
The Quake sources as originally release under the GPL license on December 21, 1999
Diffstat (limited to 'WinQuake/sys_wina.s')
| -rw-r--r-- | WinQuake/sys_wina.s | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/WinQuake/sys_wina.s b/WinQuake/sys_wina.s new file mode 100644 index 0000000..e9ba618 --- /dev/null +++ b/WinQuake/sys_wina.s @@ -0,0 +1,116 @@ +/* +Copyright (C) 1996-1997 Id Software, Inc. + +This program 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. + +This program 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 this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ +// +// sys_wina.s +// x86 assembly-language Win-dependent routines. + +#define GLQUAKE 1 // don't include unneeded defs +#include "asm_i386.h" +#include "quakeasm.h" + +// LATER should be id386-dependent, and have an equivalent C path + + .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 + |