| 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 |
| |