mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-29 07:02:08 +00:00
c3f5581b0a
Unchained, Ultimate, Ultra, Up Yours, Underworld, Underground, Unified, Unity, etc. You know the drill. This takes care of the "standalone" problem with the wrong name, and the recent snafu with multiple developers working on the same files simultaneously...expect me (and probably others) to start locking dirs when updates are taking place. And yes, this update is really as large as it looks. Software only at the moment, but I will have the makefile updated to build the GL builds as well.
116 lines
2 KiB
ArmAsm
116 lines
2 KiB
ArmAsm
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//
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// sys_wina.s
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// x86 assembly-language Win-dependent routines.
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#define GLQUAKE 1 // don't include unneeded defs
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#include "asm_i386.h"
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#include "quakeasm.h"
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// LATER should be id386-dependent, and have an equivalent C path
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.data
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.align 4
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fpenv:
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.long 0, 0, 0, 0, 0, 0, 0, 0
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.text
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.globl C(MaskExceptions)
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C(MaskExceptions):
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fnstenv fpenv
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orl $0x3F,fpenv
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fldenv fpenv
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ret
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#if 0
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.globl C(unmaskexceptions)
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C(unmaskexceptions):
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fnstenv fpenv
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andl $0xFFFFFFE0,fpenv
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fldenv fpenv
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ret
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#endif
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.data
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.align 4
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.globl ceil_cw, single_cw, full_cw, cw, pushed_cw
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ceil_cw: .long 0
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single_cw: .long 0
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full_cw: .long 0
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cw: .long 0
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pushed_cw: .long 0
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.text
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.globl C(Sys_LowFPPrecision)
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C(Sys_LowFPPrecision):
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fldcw single_cw
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ret
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.globl C(Sys_HighFPPrecision)
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C(Sys_HighFPPrecision):
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fldcw full_cw
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ret
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.globl C(Sys_PushFPCW_SetHigh)
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C(Sys_PushFPCW_SetHigh):
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fnstcw pushed_cw
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fldcw full_cw
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ret
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.globl C(Sys_PopFPCW)
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C(Sys_PopFPCW):
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fldcw pushed_cw
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ret
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.globl C(Sys_SetFPCW)
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C(Sys_SetFPCW):
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fnstcw cw
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movl cw,%eax
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#if id386
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andb $0xF0,%ah
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orb $0x03,%ah // round mode, 64-bit precision
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#endif
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movl %eax,full_cw
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#if id386
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andb $0xF0,%ah
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orb $0x0C,%ah // chop mode, single precision
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#endif
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movl %eax,single_cw
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#if id386
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andb $0xF0,%ah
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orb $0x08,%ah // ceil mode, single precision
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#endif
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movl %eax,ceil_cw
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ret
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