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|
; ===========================================================================
; Copyright (C) 2011 Thilo Schulz <thilo@tjps.eu>
;
; 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 Quake III Arena source code; if not, write to the Free Software
; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
; ===========================================================================
; MASM ftol conversion functions using SSE or FPU
; assume __cdecl calling convention is being used for x86, __fastcall for x64
.686p
.xmm
IFNDEF idx64
.model flat, c
ENDIF
.data
ifndef idx64
fpucw WORD 0F7Fh
endif
.code
IFDEF idx64
; qftol using SSE
qftolsse PROC
cvttss2si eax, xmm0
ret
qftolsse ENDP
qvmftolsse PROC
movss xmm0, dword ptr [rdi + rbx * 4]
cvttss2si eax, xmm0
ret
qvmftolsse ENDP
ELSE
; qftol using FPU
qftolx87m macro src
sub esp, 2
fnstcw word ptr [esp]
fldcw fpucw
fld dword ptr src
fistp dword ptr src
fldcw [esp]
mov eax, src
add esp, 2
ret
endm
qftolx87 PROC
qftolx87m [esp + 6]
qftolx87 ENDP
qvmftolx87 PROC
qftolx87m [edi + ebx * 4]
qvmftolx87 ENDP
; qftol using SSE
qftolsse PROC
movss xmm0, dword ptr [esp + 4]
cvttss2si eax, xmm0
ret
qftolsse ENDP
qvmftolsse PROC
movss xmm0, dword ptr [edi + ebx * 4]
cvttss2si eax, xmm0
ret
qvmftolsse ENDP
ENDIF
end
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