diff options
Diffstat (limited to 'code/unix/snapvector.nasm')
| -rwxr-xr-x | code/unix/snapvector.nasm | 188 |
1 files changed, 94 insertions, 94 deletions
diff --git a/code/unix/snapvector.nasm b/code/unix/snapvector.nasm index 3232fde..64a7eef 100755 --- a/code/unix/snapvector.nasm +++ b/code/unix/snapvector.nasm @@ -1,95 +1,95 @@ -;===========================================================================
-;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_SnapVector NASM code (Andrew Henderson)
-; See win32/win_shared.c for the Win32 equivalent
-; This code is provided to ensure that the
-; rounding behavior (and, if necessary, the
-; precision) of DLL and QVM code are identical
-; e.g. for network-visible operations.
-; See ftol.nasm for operations on a single float,
-; as used in compiled VM and DLL code that does
-; not use this system trap.
-;
-
-
-segment .data
-
-fpucw dd 0
-cw037F dd 0x037F ; Rounding to nearest (even).
-
-segment .text
-
-; void Sys_SnapVector( float *v )
-global Sys_SnapVector
-Sys_SnapVector:
- push eax
- push ebp
- mov ebp, esp
-
- fnstcw [fpucw]
- mov eax, dword [ebp + 12]
- fldcw [cw037F]
- fld dword [eax]
- fistp dword [eax]
- fild dword [eax]
- fstp dword [eax]
- fld dword [eax + 4]
- fistp dword [eax + 4]
- fild dword [eax + 4]
- fstp dword [eax + 4]
- fld dword [eax + 8]
- fistp dword [eax + 8]
- fild dword [eax + 8]
- fstp dword [eax + 8]
- fldcw [fpucw]
-
- pop ebp
- pop eax
- ret
-
-; void Sys_SnapVectorCW( float *v, unsigned short int cw )
-global Sys_SnapVectorCW
-Sys_SnapVector_cw:
- push eax
- push ebp
- mov ebp, esp
-
- fnstcw [fpucw]
- mov eax, dword [ebp + 12]
- fldcw [ebp + 16]
- fld dword [eax]
- fistp dword [eax]
- fild dword [eax]
- fstp dword [eax]
- fld dword [eax + 4]
- fistp dword [eax + 4]
- fild dword [eax + 4]
- fstp dword [eax + 4]
- fld dword [eax + 8]
- fistp dword [eax + 8]
- fild dword [eax + 8]
- fstp dword [eax + 8]
- fldcw [fpucw]
-
- pop ebp
- pop eax
+;=========================================================================== +;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_SnapVector NASM code (Andrew Henderson) +; See win32/win_shared.c for the Win32 equivalent +; This code is provided to ensure that the +; rounding behavior (and, if necessary, the +; precision) of DLL and QVM code are identical +; e.g. for network-visible operations. +; See ftol.nasm for operations on a single float, +; as used in compiled VM and DLL code that does +; not use this system trap. +; + + +segment .data + +fpucw dd 0 +cw037F dd 0x037F ; Rounding to nearest (even). + +segment .text + +; void Sys_SnapVector( float *v ) +global Sys_SnapVector +Sys_SnapVector: + push eax + push ebp + mov ebp, esp + + fnstcw [fpucw] + mov eax, dword [ebp + 12] + fldcw [cw037F] + fld dword [eax] + fistp dword [eax] + fild dword [eax] + fstp dword [eax] + fld dword [eax + 4] + fistp dword [eax + 4] + fild dword [eax + 4] + fstp dword [eax + 4] + fld dword [eax + 8] + fistp dword [eax + 8] + fild dword [eax + 8] + fstp dword [eax + 8] + fldcw [fpucw] + + pop ebp + pop eax + ret + +; void Sys_SnapVectorCW( float *v, unsigned short int cw ) +global Sys_SnapVectorCW +Sys_SnapVector_cw: + push eax + push ebp + mov ebp, esp + + fnstcw [fpucw] + mov eax, dword [ebp + 12] + fldcw [ebp + 16] + fld dword [eax] + fistp dword [eax] + fild dword [eax] + fstp dword [eax] + fld dword [eax + 4] + fistp dword [eax + 4] + fild dword [eax + 4] + fstp dword [eax + 4] + fld dword [eax + 8] + fistp dword [eax + 8] + fild dword [eax + 8] + fstp dword [eax + 8] + fldcw [fpucw] + + pop ebp + pop eax ret
\ No newline at end of file |