mirror of
https://github.com/ZDoom/qzdoom.git
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537 lines
12 KiB
Text
537 lines
12 KiB
Text
;*
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;* misc.nas
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;* Miscellaneous assembly functions
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;*
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;*---------------------------------------------------------------------------
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;* Copyright 1998-2006 Randy Heit
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;* All rights reserved.
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;*
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;* Redistribution and use in source and binary forms, with or without
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;* modification, are permitted provided that the following conditions
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;* are met:
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;*
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;* 1. Redistributions of source code must retain the above copyright
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;* notice, this list of conditions and the following disclaimer.
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;* 2. Redistributions in binary form must reproduce the above copyright
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;* notice, this list of conditions and the following disclaimer in the
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;* documentation and/or other materials provided with the distribution.
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;* 3. The name of the author may not be used to endorse or promote products
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;* derived from this software without specific prior written permission.
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;*
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;* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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;* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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;* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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;* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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;* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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;* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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;* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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;* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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;* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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;* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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;*---------------------------------------------------------------------------
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;*
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BITS 32
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%ifndef M_TARGET_LINUX
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%define CheckMMX _CheckMMX
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%define EndMMX _EndMMX
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%define DoBlending_MMX _DoBlending_MMX
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%define BestColor_MMX _BestColor_MMX
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%define DoubleHoriz_MMX _DoubleHoriz_MMX
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%define DoubleHorizVert_MMX _DoubleHorizVert_MMX
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%define DoubleVert_ASM _DoubleVert_ASM
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%endif
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%ifdef M_TARGET_WATCOM
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SEGMENT DATA PUBLIC ALIGN=16 CLASS=DATA USE32
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SEGMENT DATA
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%else
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SECTION .data
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%endif
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Blending256:
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dd 0x01000100,0x00000100
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%ifdef M_TARGET_WATCOM
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SEGMENT CODE PUBLIC ALIGN=16 CLASS=CODE USE32
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SEGMENT CODE
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%else
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SECTION .text
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%endif
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;-----------------------------------------------------------
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;
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; CheckMMX
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;
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; Checks for the presence of MMX instructions on the
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; current processor. This code is adapted from the samples
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; in AMD's document entitled "AMD-K6<4B> MMX Processor
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; Multimedia Extensions." Also fills in the vendor
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; information string.
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;
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;-----------------------------------------------------------
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GLOBAL CheckMMX
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; void CheckMMX (struct CPUInfo *)
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CheckMMX:
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xor eax,eax
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mov ecx,92/4
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push ebx
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push edi
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mov edi,[esp+12]
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rep stosd
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sub edi,92
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mov [edi+88],byte 32; Assume a 32-byte cache line
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pushfd ; save EFLAGS
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pop eax ; store EFLAGS in EAX
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mov ebx,eax ; save in EBX for later testing
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xor eax,0x00200000 ; toggle bit 21
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push eax ; put to stack
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popfd ; save changed EAX to EFLAGS
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pushfd ; push EFLAGS to TOS
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pop eax ; store EFLAGS in EAX
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cmp eax,ebx ; see if bit 21 has changed
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jz near .noid ; if no change, then no CPUID
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; Get vendor ID
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xor eax,eax
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CPUID
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mov [edi],ebx
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mov [edi+4],edx
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mov [edi+8],ecx
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cmp ebx,0x68747541 ; 'htuA'
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jne .notamd
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cmp edx,0x69746e65 ; 'itne'
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jne .notamd
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cmp ecx,0x444d4163 ; 'DMAc'
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jne .notamd
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inc byte [edi+87]
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.notamd
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; Get features flags and other info
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mov eax,1
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CPUID
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mov [edi+68],ebx ; Store brand index and other stuff
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mov [edi+72],ecx ; Store extended feature flags
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mov [edi+76],edx ; Store feature flags
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test edx,(1<<19) ; If CLFLUSH instruction is supported,
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jz .noclf
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shl bh,3 ; get the real cache line size.
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mov [edi+88],bh
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.noclf mov bl,al ; Extract stepping
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and bl,0x0F
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mov [edi+64],bl
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mov bl,ah ; Extract processor type
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shr bl,4 ; (Valid for Intel only)
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and bl,0x03
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mov [edi+67],bl
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shr al,4 ; Extract model and family
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and ah,0x0F ; model in al and family in ah
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cmp ah,15
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jne .noex
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mov ebx,eax ; Add extended model and family
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shr ebx,12
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and bl,0xF0
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add ah,bh
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or al,bl
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.noex mov [edi+65],al
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mov [edi+66],ah
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; Check for processor brand string
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mov eax,0x80000000
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CPUID
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cmp eax,0x80000001
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je .feat2
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jb near .noid
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cmp eax,0x80000004
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jb .feat2
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cmp eax,0x80000005
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jb .brand
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; Get data L1 cache info
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mov eax,0x80000005
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CPUID
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mov [edi+88],ecx
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; Get processor brand string
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.brand mov eax,0x80000002
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CPUID
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mov [edi+16],eax
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mov [edi+20],ebx
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mov [edi+24],ecx
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mov [edi+28],edx
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mov eax,0x80000003
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CPUID
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mov [edi+32],eax
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mov [edi+36],ebx
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mov [edi+40],ecx
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mov [edi+44],edx
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mov eax,0x80000004
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CPUID
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mov [edi+48],eax
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mov [edi+52],ebx
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mov [edi+56],ecx
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mov [edi+60],edx
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; Get AMD-specific feature flags
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.feat2 cmp byte [edi+87],0
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jz .noid
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mov eax,0x80000001
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CPUID
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mov [edi+80],edx
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mov bl,al ; Extract stepping
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and bl,0x0F
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mov [edi+84],bl
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shr al,4 ; Extract model and family
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and ah,0x0F ; model in al and family in ah
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cmp ah,15
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jne .noex2
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mov ebx,eax ; Add extended model and family
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shr ebx,12
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and bl,0xF0
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add ah,bh
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or al,bl
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.noex2 mov [edi+85],al
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mov [edi+86],ah
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.noid pop edi
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pop ebx
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ret
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;-----------------------------------------------------------
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;
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; EndMMX
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;
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; Signal the end of MMX code for compilers that can't
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; do inline assembly. Currently unused.
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;
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;-----------------------------------------------------------
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GLOBAL EndMMX
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EndMMX:
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emms
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ret
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;-----------------------------------------------------------
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;
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; DoBlending_MMX
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;
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; MMX version of DoBlending
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;
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; (DWORD *from, DWORD *to, count, tor, tog, tob, toa)
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;-----------------------------------------------------------
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GLOBAL DoBlending_MMX
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DoBlending_MMX:
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pxor mm0,mm0 ; mm0 = 0
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mov eax,[esp+4*4]
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shl eax,16
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mov edx,[esp+4*5]
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shl edx,8
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or eax,[esp+4*6]
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or eax,edx
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mov ecx,[esp+4*3] ; ecx = count
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movd mm1,eax ; mm1 = 00000000 00RRGGBB
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mov eax,[esp+4*7]
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shl eax,16
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mov edx,[esp+4*7]
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shl edx,8
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or eax,[esp+4*7]
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or eax,edx
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mov edx,[esp+4*2] ; edx = dest
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movd mm6,eax ; mm6 = 00000000 00AAAAAA
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punpcklbw mm1,mm0 ; mm1 = 000000RR 00GG00BB
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movq mm7,[Blending256]
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punpcklbw mm6,mm0 ; mm6 = 000000AA 00AA00AA
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mov eax,[esp+4*1] ; eax = source
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pmullw mm1,mm6 ; mm1 = 000000RR 00GG00BB (multiplied by alpha)
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psubusw mm7,mm6 ; mm7 = 000000aa 00aa00aa (one minus alpha)
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nop ; Does this actually pair on a Pentium?
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; Do two colors per iteration: Count must be even.
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.loop movq mm2,[eax] ; mm2 = 00r2g2b2 00r1g1b1
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add eax,8
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movq mm3,mm2 ; mm3 = 00r2g2b2 00r1g1b1
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punpcklbw mm2,mm0 ; mm2 = 000000r1 00g100b1
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movq mm4,mm1
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punpckhbw mm3,mm0 ; mm3 = 000000r2 00g200b2
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pmullw mm2,mm7 ; mm2 = 0000r1rr g1ggb1bb
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add edx,8
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pmullw mm3,mm7 ; mm3 = 0000r2rr g2ggb2bb
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sub ecx,2
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paddusw mm2,mm1
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paddusw mm3,mm1
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psrlw mm2,8
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psrlw mm3,8
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packuswb mm2,mm3 ; mm2 = 00r2g2b2 00r1g1b1
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movq [edx-8],mm2
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jnz .loop
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emms
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ret
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;-----------------------------------------------------------
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;
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; BestColor_MMX
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;
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; Picks the closest matching color from a palette
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;
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; Passed FFRRGGBB and palette array in same format
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; FF is the index of the first palette entry to consider
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;
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;-----------------------------------------------------------
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GLOBAL BestColor_MMX
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GLOBAL @BestColor_MMX@8
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BestColor_MMX:
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mov ecx,[esp+4]
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mov edx,[esp+8]
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@BestColor_MMX@8:
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pxor mm0,mm0
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movd mm1,ecx ; mm1 = color searching for
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mov eax,257*257+257*257+257*257 ;eax = bestdist
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push ebx
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punpcklbw mm1,mm0
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mov ebx,ecx ; ebx = best color
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shr ecx,24 ; ecx = count
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and ebx,0xffffff
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push esi
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push ebp
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.loop movd mm2,[edx+ecx*4] ; mm2 = color considering now
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inc ecx
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punpcklbw mm2,mm0
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movq mm3,mm1
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psubsw mm3,mm2
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pmullw mm3,mm3 ; mm3 = color distance squared
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movd ebp,mm3 ; add the three components
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psrlq mm3,32 ; into ebp to get the real
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mov esi,ebp ; (squared) distance
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shr esi,16
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and ebp,0xffff
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add ebp,esi
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movd esi,mm3
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add ebp,esi
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jz .perf ; found a perfect match
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cmp eax,ebp
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jb .skip
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mov eax,ebp
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lea ebx,[ecx-1]
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.skip cmp ecx,256
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jne .loop
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mov eax,ebx
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pop ebp
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pop esi
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pop ebx
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emms
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ret
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.perf lea eax,[ecx-1]
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pop ebp
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pop esi
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pop ebx
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emms
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ret
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;-----------------------------------------------------------
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;
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; DoubleHoriz_MMX
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;
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; Stretches an image horizontally using MMX instructions.
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; The source image is assumed to occupy the right half
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; of the destination image.
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;
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; height of source
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; width of source
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; dest pointer (at end of row)
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; pitch
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;
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;-----------------------------------------------------------
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GLOBAL DoubleHoriz_MMX
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DoubleHoriz_MMX:
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mov edx,[esp+8] ; edx = width
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push edi
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neg edx ; make edx negative so we can count up
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mov edi,[esp+16] ; edi = dest pointer
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sar edx,2 ; and make edx count groups of 4 pixels
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push ebp
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mov ebp,edx ; ebp = # of columns remaining in this row
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push ebx
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mov ebx,[esp+28] ; ebx = pitch
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mov ecx,[esp+16] ; ecx = # of rows remaining
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.loop movq mm0,[edi+ebp*4]
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.loop2 movq mm1,mm0
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punpcklbw mm0,mm0 ; double left 4 pixels
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movq mm2,[edi+ebp*4+8]
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punpckhbw mm1,mm1 ; double right 4 pixels
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movq [edi+ebp*8],mm0 ; write left pixels
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movq mm0,mm2
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movq [edi+ebp*8+8],mm1 ; write right pixels
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add ebp,2 ; increment counter
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jnz .loop2 ; repeat until done with this row
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add edi,ebx ; move edi to next row
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dec ecx ; decrease row counter
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mov ebp,edx ; prep ebp for next row
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jnz .loop ; repeat until every row is done
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emms
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pop ebx
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pop ebp
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pop edi
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ret
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;-----------------------------------------------------------
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;
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; DoubleHorizVert_MMX
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;
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; Stretches an image horizontally and vertically using
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; MMX instructions. The source image is assumed to occupy
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; the right half of the destination image and to leave
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; every other line unused for expansion.
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;
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; height of source
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; width of source
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; dest pointer (at end of row)
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; pitch
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;
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;-----------------------------------------------------------
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GLOBAL DoubleHorizVert_MMX
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DoubleHorizVert_MMX:
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mov edx,[esp+8] ; edx = width
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push edi
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neg edx ; make edx negative so we can count up
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mov edi,[esp+16] ; edi = dest pointer
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sar edx,2 ; and make edx count groups of 4 pixels
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push ebp
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mov ebp,edx ; ebp = # of columns remaining in this row
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push ebx
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mov ebx,[esp+28] ; ebx = pitch
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mov ecx,[esp+16] ; ecx = # of rows remaining
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push esi
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lea esi,[edi+ebx]
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.loop movq mm0,[edi+ebp*4] ; get 8 pixels
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movq mm1,mm0
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punpcklbw mm0,mm0 ; double left 4
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punpckhbw mm1,mm1 ; double right 4
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add ebp,2 ; increment counter
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movq [edi+ebp*8-16],mm0 ; write them back out
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movq [edi+ebp*8-8],mm1
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movq [esi+ebp*8-16],mm0
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movq [esi+ebp*8-8],mm1
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jnz .loop ; repeat until done with this row
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lea edi,[edi+ebx*2] ; move edi and esi to next row
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lea esi,[esi+ebx*2]
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dec ecx ; decrease row counter
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mov ebp,edx ; prep ebp for next row
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jnz .loop ; repeat until every row is done
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emms
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pop esi
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pop ebx
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pop ebp
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pop edi
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ret
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;-----------------------------------------------------------
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;
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; DoubleVert_ASM
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;
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; Stretches an image vertically using regular x86
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; instructions. The source image should be interleaved.
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;
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; height of source
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; width of source
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; source/dest pointer
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; pitch
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;
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;-----------------------------------------------------------
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GLOBAL DoubleVert_ASM
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DoubleVert_ASM:
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mov edx,[esp+16] ; edx = pitch
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mov eax,[esp+4] ; eax = # of rows left
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push esi
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mov esi,[esp+16]
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push edi
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lea edi,[esi+edx]
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shl edx,1 ; edx = pitch*2
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mov ecx,[esp+16]
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sub edx,ecx ; edx = dist from end of one line to start of next
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shr ecx,2
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.loop rep movsd
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mov ecx,[esp+16]
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add esi,edx
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add edi,edx
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shr ecx,2
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dec eax
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jnz .loop
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pop edi
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pop esi
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ret
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