src/cpuinfo/SDL_cpuinfo.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 06 May 2004 15:55:06 +0000
changeset 886 05c551e5bc64
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child 887 b4b64bb88f2f
permissions -rw-r--r--
Date: Sat, 24 Apr 2004 15:13:32 +0300 From: "Mike Gorchak" Subject: SDL updates for the QNX6 1. Updated the README.QNX 2. Updated libtool scripts, which are shipped with SDL for QNX6 support. 3. Added some code to support the new QNX 6.3.0, which is in beta now. 4. Added code to detect the hw features, which driver supports. 5. Added hw alpha blits code. 6. Fixed bug when application switches to fullscreen more the 2 times. (afte\ r that window becames always stay on top). 7. Updated a bit README for the tests. 8. Added information about acceleration show in the testalpha.c test. 9. Added small fixes to the testoverlay2.c test. 10. Added alpha and cc+alpha blits benchmarks to the testvidinfo.c test.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library 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.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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/* CPU feature detection for SDL */
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#ifdef unix /* FIXME: Better setjmp detection? */
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#define USE_SETJMP
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#include <signal.h>
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#include <setjmp.h>
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#endif
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#include "SDL.h"
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#include "SDL_cpuinfo.h"
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#ifdef MACOSX
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#include <sys/sysctl.h> /* For AltiVec check */
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#endif
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#define CPU_HAS_RDTSC	0x00000001
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#define CPU_HAS_MMX	0x00000002
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#define CPU_HAS_MMXEXT	0x00000004
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#define CPU_HAS_3DNOW	0x00000010
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#define CPU_HAS_3DNOWEXT 0x00000020
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#define CPU_HAS_SSE	0x00000040
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#define CPU_HAS_SSE2	0x00000080
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#define CPU_HAS_ALTIVEC	0x00000100
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#ifdef USE_SETJMP
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/* This is the brute force way of detecting instruction sets...
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   the idea is borrowed from the libmpeg2 library - thanks!
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 */
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static jmp_buf jmpbuf;
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static void illegal_instruction(int sig)
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{
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	longjmp(jmpbuf, 1);
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}
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#endif // USE_SETJMP
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static __inline__ int CPU_haveCPUID()
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{
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	int has_CPUID = 0;
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#if defined(__GNUC__) && defined(i386)
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	__asm__ (
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"        pushfl                      # Get original EFLAGS             \n"
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"        popl    %%eax                                                 \n"
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"        movl    %%eax,%%ecx                                           \n"
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"        xorl    $0x200000,%%eax     # Flip ID bit in EFLAGS           \n"
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"        pushl   %%eax               # Save new EFLAGS value on stack  \n"
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"        popfl                       # Replace current EFLAGS value    \n"
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"        pushfl                      # Get new EFLAGS                  \n"
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"        popl    %%eax               # Store new EFLAGS in EAX         \n"
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"        xorl    %%ecx,%%eax         # Can not toggle ID bit,          \n"
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"        jz      1f                  # Processor=80486                 \n"
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"        movl    $1,%0               # We have CPUID support           \n"
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"1:                                                                    \n"
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	: "=m" (has_CPUID)
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	:
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	: "%eax", "%ecx"
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	);
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#elif defined(__GNUC__) && defined(__x86_64__)
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/* Technically, if this is being compiled under __x86_64__ then it has 
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CPUid by definition.  But it's nice to be able to prove it.  :)      */
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	__asm__ (
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"        pushfq                      # Get original EFLAGS             \n"
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"        popq    %%rax                                                 \n"
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"        movq    %%rax,%%rcx                                           \n"
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"        xorl    $0x200000,%%eax     # Flip ID bit in EFLAGS           \n"
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"        pushq   %%rax               # Save new EFLAGS value on stack  \n"
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"        popfq                       # Replace current EFLAGS value    \n"
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"        pushfq                      # Get new EFLAGS                  \n"
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"        popq    %%rax               # Store new EFLAGS in EAX         \n"
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"        xorl    %%ecx,%%eax         # Can not toggle ID bit,          \n"
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"        jz      1f                  # Processor=80486                 \n"
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"        movl    $1,%0               # We have CPUID support           \n"
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"1:                                                                    \n"
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	: "=m" (has_CPUID)
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	:
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	: "%rax", "%rcx"
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	);
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#elif defined(_MSC_VER)
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	__asm {
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        pushfd                      ; Get original EFLAGS
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        pop     eax
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        mov     ecx, eax
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        xor     eax, 200000h        ; Flip ID bit in EFLAGS
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        push    eax                 ; Save new EFLAGS value on stack
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        popfd                       ; Replace current EFLAGS value
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        pushfd                      ; Get new EFLAGS
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        pop     eax                 ; Store new EFLAGS in EAX
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        xor     eax, ecx            ; Can not toggle ID bit,
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        jz      done                ; Processor=80486
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        mov     has_CPUID,1         ; We have CPUID support
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done:
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	}
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#endif
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	return has_CPUID;
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}
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22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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   122
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static __inline__ int CPU_getCPUIDFeatures()
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{
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   125
	int features = 0;
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   126
#if defined(__GNUC__) && ( defined(i386) || defined(__x86_64__) )
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   127
	__asm__ (
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   128
"        movl    %%ebx,%%edi\n"
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   129
"        xorl    %%eax,%%eax         # Set up for CPUID instruction    \n"
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   130
"        cpuid                       # Get and save vendor ID          \n"
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   131
"        cmpl    $1,%%eax            # Make sure 1 is valid input for CPUID\n"
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"        jl      1f                  # We dont have the CPUID instruction\n"
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   133
"        xorl    %%eax,%%eax                                           \n"
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"        incl    %%eax                                                 \n"
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"        cpuid                       # Get family/model/stepping/features\n"
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   136
"        movl    %%edx,%0                                              \n"
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   137
"1:                                                                    \n"
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   138
"        movl    %%edi,%%ebx\n"
784
a2dde6aff60e *** empty log message ***
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   139
	: "=m" (features)
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	:
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	: "%eax", "%ebx", "%ecx", "%edx", "%edi"
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   142
	);
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   143
#elif defined(_MSC_VER)
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   144
	__asm {
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   145
        xor     eax, eax            ; Set up for CPUID instruction
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        cpuid                       ; Get and save vendor ID
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   147
        cmp     eax, 1              ; Make sure 1 is valid input for CPUID
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   148
        jl      done                ; We dont have the CPUID instruction
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   149
        xor     eax, eax
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   150
        inc     eax
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   151
        cpuid                       ; Get family/model/stepping/features
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   152
        mov     features, edx
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   153
done:
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   154
	}
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   155
#endif
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   156
	return features;
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   157
}
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   158
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   159
static __inline__ int CPU_getCPUIDFeaturesExt()
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   160
{
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   161
	int features = 0;
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9eb85a211abd Date: Tue, 30 Mar 2004 18:18:13 -0600
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   162
#if defined(__GNUC__) && (defined(i386) || defined (__x86_64__) )
785
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   163
	__asm__ (
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   164
"        movl    %%ebx,%%edi\n"
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   165
"        movl    $0x80000000,%%eax   # Query for extended functions    \n"
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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   166
"        cpuid                       # Get extended function limit     \n"
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   167
"        cmpl    $0x80000001,%%eax                                     \n"
787
07760c8854d1 Date: Sat, 24 Jan 2004 14:49:58 +0100
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parents: 786
diff changeset
   168
"        jl      1f                  # Nope, we dont have function 800000001h\n"
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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   169
"        movl    $0x80000001,%%eax   # Setup extended function 800000001h\n"
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   170
"        cpuid                       # and get the information         \n"
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   171
"        movl    %%edx,%0                                              \n"
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   172
"1:                                                                    \n"
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   173
"        movl    %%edi,%%ebx\n"
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   174
	: "=m" (features)
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   175
	:
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   176
	: "%eax", "%ebx", "%ecx", "%edx", "%edi"
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   177
	);
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   178
#elif defined(_MSC_VER)
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   179
	__asm {
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   180
        mov     eax,80000000h       ; Query for extended functions
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   181
        cpuid                       ; Get extended function limit
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   182
        cmp     eax,80000001h
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07760c8854d1 Date: Sat, 24 Jan 2004 14:49:58 +0100
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   183
        jl      done                ; Nope, we dont have function 800000001h
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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   184
        mov     eax,80000001h       ; Setup extended function 800000001h
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   185
        cpuid                       ; and get the information
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   186
        mov     features,edx
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   187
done:
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   188
	}
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   189
#endif
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   190
	return features;
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   191
}
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   192
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   193
static __inline__ int CPU_haveRDTSC()
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   194
{
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   195
	if ( CPU_haveCPUID() ) {
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   196
		return (CPU_getCPUIDFeatures() & 0x00000010);
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   197
	}
71ee03909f42 Greatly simplified the SDL CPU info code
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   198
	return 0;
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   199
}
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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   200
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   201
static __inline__ int CPU_haveMMX()
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   202
{
71ee03909f42 Greatly simplified the SDL CPU info code
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   203
	if ( CPU_haveCPUID() ) {
71ee03909f42 Greatly simplified the SDL CPU info code
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   204
		return (CPU_getCPUIDFeatures() & 0x00800000);
71ee03909f42 Greatly simplified the SDL CPU info code
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   205
	}
71ee03909f42 Greatly simplified the SDL CPU info code
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   206
	return 0;
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   207
}
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diff changeset
   208
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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   209
static __inline__ int CPU_haveMMXExt()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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   210
{
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   211
	if ( CPU_haveCPUID() ) {
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   212
		return (CPU_getCPUIDFeaturesExt() & 0x00400000);
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diff changeset
   213
	}
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   214
	return 0;
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diff changeset
   215
}
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   216
745
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   217
static __inline__ int CPU_have3DNow()
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diff changeset
   218
{
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   219
	if ( CPU_haveCPUID() ) {
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diff changeset
   220
		return (CPU_getCPUIDFeaturesExt() & 0x80000000);
747
da36f59485da Check for CPUID before checking for 3DNow!
Sam Lantinga <slouken@libsdl.org>
parents: 745
diff changeset
   221
	}
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   222
	return 0;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   223
}
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   224
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   225
static __inline__ int CPU_have3DNowExt()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   226
{
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diff changeset
   227
	if ( CPU_haveCPUID() ) {
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   228
		return (CPU_getCPUIDFeaturesExt() & 0x40000000);
745
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diff changeset
   229
	}
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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   230
	return 0;
745
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   231
}
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   232
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   233
static __inline__ int CPU_haveSSE()
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   234
{
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   235
	if ( CPU_haveCPUID() ) {
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   236
		return (CPU_getCPUIDFeatures() & 0x02000000);
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
   237
	}
71ee03909f42 Greatly simplified the SDL CPU info code
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diff changeset
   238
	return 0;
71ee03909f42 Greatly simplified the SDL CPU info code
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parents: 739
diff changeset
   239
}
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   240
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   241
static __inline__ int CPU_haveSSE2()
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   242
{
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   243
	if ( CPU_haveCPUID() ) {
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   244
		return (CPU_getCPUIDFeatures() & 0x04000000);
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   245
	}
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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diff changeset
   246
	return 0;
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
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parents: 784
diff changeset
   247
}
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   248
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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parents: 769
diff changeset
   249
static __inline__ int CPU_haveAltiVec()
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
   250
{
796
dec19b813b04 *** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents: 795
diff changeset
   251
	volatile int altivec = 0;
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
   252
#ifdef MACOSX
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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parents: 769
diff changeset
   253
	int selectors[2] = { CTL_HW, HW_VECTORUNIT }; 
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
   254
	int hasVectorUnit = 0; 
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	size_t length = sizeof(hasVectorUnit); 
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   256
	int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0); 
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   257
	if( 0 == error )
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		altivec = (hasVectorUnit != 0); 
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   259
#elif defined(USE_SETJMP) && defined(GCC_ALTIVEC)
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	void (*handler)(int sig);
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	handler = signal(SIGILL, illegal_instruction);
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	if ( setjmp(jmpbuf) == 0 ) {
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   263
		asm volatile ("mtspr 256, %0\n\t"
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			      "vand %%v0, %%v0, %%v0"
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			      :
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			      : "r" (-1));
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		altivec = 1;
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   268
	}
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	signal(SIGILL, handler);
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   270
#endif
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	return altivec; 
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   272
}
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static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
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static Uint32 SDL_GetCPUFeatures()
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{
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   278
	if ( SDL_CPUFeatures == 0xFFFFFFFF ) {
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		SDL_CPUFeatures = 0;
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		if ( CPU_haveRDTSC() ) {
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			SDL_CPUFeatures |= CPU_HAS_RDTSC;
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		}
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		if ( CPU_haveMMX() ) {
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   284
			SDL_CPUFeatures |= CPU_HAS_MMX;
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   285
		}
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		if ( CPU_haveMMXExt() ) {
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			SDL_CPUFeatures |= CPU_HAS_MMXEXT;
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		}
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		if ( CPU_have3DNow() ) {
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   290
			SDL_CPUFeatures |= CPU_HAS_3DNOW;
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		}
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		if ( CPU_have3DNowExt() ) {
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			SDL_CPUFeatures |= CPU_HAS_3DNOWEXT;
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		}
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		if ( CPU_haveSSE() ) {
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			SDL_CPUFeatures |= CPU_HAS_SSE;
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		}
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		if ( CPU_haveSSE2() ) {
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			SDL_CPUFeatures |= CPU_HAS_SSE2;
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		}
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		if ( CPU_haveAltiVec() ) {
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			SDL_CPUFeatures |= CPU_HAS_ALTIVEC;
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   303
		}
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	}
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   305
	return SDL_CPUFeatures;
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   306
}
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SDL_bool SDL_HasRDTSC()
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   309
{
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	if ( SDL_GetCPUFeatures() & CPU_HAS_RDTSC ) {
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		return SDL_TRUE;
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   312
	}
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	return SDL_FALSE;
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   314
}
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   315
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SDL_bool SDL_HasMMX()
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{
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   318
	if ( SDL_GetCPUFeatures() & CPU_HAS_MMX ) {
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   319
		return SDL_TRUE;
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   320
	}
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   321
	return SDL_FALSE;
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   322
}
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   323
804
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   324
SDL_bool SDL_HasMMXExt()
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   325
{
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   326
	if ( SDL_GetCPUFeatures() & CPU_HAS_MMXEXT ) {
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   327
		return SDL_TRUE;
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   328
	}
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   329
	return SDL_FALSE;
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   330
}
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   331
739
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   332
SDL_bool SDL_Has3DNow()
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diff changeset
   333
{
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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   334
	if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOW ) {
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   335
		return SDL_TRUE;
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diff changeset
   336
	}
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   337
	return SDL_FALSE;
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   338
}
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   339
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SDL_bool SDL_Has3DNowExt()
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   341
{
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   342
	if ( SDL_GetCPUFeatures() & CPU_HAS_3DNOWEXT ) {
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   343
		return SDL_TRUE;
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   344
	}
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   345
	return SDL_FALSE;
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   346
}
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   347
739
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   348
SDL_bool SDL_HasSSE()
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   349
{
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
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   350
	if ( SDL_GetCPUFeatures() & CPU_HAS_SSE ) {
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   351
		return SDL_TRUE;
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diff changeset
   352
	}
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   353
	return SDL_FALSE;
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   354
}
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   355
804
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   356
SDL_bool SDL_HasSSE2()
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   357
{
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   358
	if ( SDL_GetCPUFeatures() & CPU_HAS_SSE2 ) {
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   359
		return SDL_TRUE;
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   360
	}
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   361
	return SDL_FALSE;
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   362
}
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   363
778
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   364
SDL_bool SDL_HasAltiVec()
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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diff changeset
   365
{
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
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   366
	if ( SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC ) {
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   367
		return SDL_TRUE;
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   368
	}
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   369
	return SDL_FALSE;
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   370
}
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739
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   372
#ifdef TEST_MAIN
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   373
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   374
#include <stdio.h>
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   376
int main()
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   377
{
778
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   378
	printf("RDTSC: %d\n", SDL_HasRDTSC());
739
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   379
	printf("MMX: %d\n", SDL_HasMMX());
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
   380
	printf("MMXExt: %d\n", SDL_HasMMXExt());
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   381
	printf("3DNow: %d\n", SDL_Has3DNow());
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
   382
	printf("3DNowExt: %d\n", SDL_Has3DNowExt());
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   383
	printf("SSE: %d\n", SDL_HasSSE());
785
ca06a994f03c Fixed bugs in CPU feature detection and added extended feature detection
Sam Lantinga <slouken@libsdl.org>
parents: 784
diff changeset
   384
	printf("SSE2: %d\n", SDL_HasSSE2());
778
8ac3f46f9d09 Date: Tue, 6 Jan 2004 12:42:19 +0100
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
   385
	printf("AltiVec: %d\n", SDL_HasAltiVec());
745
71ee03909f42 Greatly simplified the SDL CPU info code
Sam Lantinga <slouken@libsdl.org>
parents: 739
diff changeset
   386
	return 0;
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   387
}
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   388
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   389
#endif /* TEST_MAIN */