683 lines
20 KiB
C
683 lines
20 KiB
C
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#if defined(__WIN32__)
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#include "../core/windows/SDL_windows.h"
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#endif
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/* CPU feature detection for SDL */
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#include "SDL_cpuinfo.h"
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#ifdef HAVE_SYSCONF
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYSCTLBYNAME
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#endif
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#if defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))
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#include <sys/sysctl.h> /* For AltiVec check */
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#elif defined(__OpenBSD__) && defined(__powerpc__)
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#include <sys/param.h>
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#include <sys/sysctl.h> /* For AltiVec check */
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#include <machine/cpu.h>
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#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
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#include <signal.h>
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#include <setjmp.h>
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#endif
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#define CPU_HAS_RDTSC 0x00000001
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#define CPU_HAS_ALTIVEC 0x00000002
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#define CPU_HAS_MMX 0x00000004
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#define CPU_HAS_3DNOW 0x00000008
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#define CPU_HAS_SSE 0x00000010
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#define CPU_HAS_SSE2 0x00000020
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#define CPU_HAS_SSE3 0x00000040
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#define CPU_HAS_SSE41 0x00000100
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#define CPU_HAS_SSE42 0x00000200
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#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__
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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
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illegal_instruction(int sig)
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{
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longjmp(jmpbuf, 1);
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}
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#endif /* HAVE_SETJMP */
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static SDL_INLINE int
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CPU_haveCPUID(void)
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{
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int has_CPUID = 0;
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/* *INDENT-OFF* */
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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) && defined(_M_IX86)) || defined(__WATCOMC__)
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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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#elif defined(__sun) && defined(__i386)
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__asm (
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" pushfl \n"
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" popl %eax \n"
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" movl %eax,%ecx \n"
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" xorl $0x200000,%eax \n"
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" pushl %eax \n"
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" popfl \n"
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" pushfl \n"
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" popl %eax \n"
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" xorl %ecx,%eax \n"
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" jz 1f \n"
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" movl $1,-8(%ebp) \n"
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"1: \n"
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);
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#elif defined(__sun) && defined(__amd64)
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__asm (
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" pushfq \n"
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" popq %rax \n"
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" movq %rax,%rcx \n"
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" xorl $0x200000,%eax \n"
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" pushq %rax \n"
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" popfq \n"
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" pushfq \n"
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" popq %rax \n"
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" xorl %ecx,%eax \n"
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" jz 1f \n"
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" movl $1,-8(%rbp) \n"
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"1: \n"
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);
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#endif
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/* *INDENT-ON* */
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return has_CPUID;
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}
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#if defined(__GNUC__) && defined(i386)
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#define cpuid(func, a, b, c, d) \
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__asm__ __volatile__ ( \
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" pushl %%ebx \n" \
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" cpuid \n" \
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" movl %%ebx, %%esi \n" \
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" popl %%ebx \n" : \
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"=a" (a), "=S" (b), "=c" (c), "=d" (d) : "a" (func))
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#elif defined(__GNUC__) && defined(__x86_64__)
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#define cpuid(func, a, b, c, d) \
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__asm__ __volatile__ ( \
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" pushq %%rbx \n" \
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" cpuid \n" \
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" movq %%rbx, %%rsi \n" \
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" popq %%rbx \n" : \
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"=a" (a), "=S" (b), "=c" (c), "=d" (d) : "a" (func))
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#elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
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#define cpuid(func, a, b, c, d) \
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__asm { \
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__asm mov eax, func \
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__asm cpuid \
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__asm mov a, eax \
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__asm mov b, ebx \
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__asm mov c, ecx \
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__asm mov d, edx \
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}
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#else
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#define cpuid(func, a, b, c, d) \
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a = b = c = d = 0
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#endif
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static SDL_INLINE int
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CPU_getCPUIDFeatures(void)
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{
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int features = 0;
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int a, b, c, d;
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cpuid(0, a, b, c, d);
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if (a >= 1) {
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cpuid(1, a, b, c, d);
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features = d;
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}
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return features;
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}
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static SDL_INLINE int
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CPU_haveRDTSC(void)
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{
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if (CPU_haveCPUID()) {
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return (CPU_getCPUIDFeatures() & 0x00000010);
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_haveAltiVec(void)
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{
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volatile int altivec = 0;
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#if (defined(__MACOSX__) && (defined(__ppc__) || defined(__ppc64__))) || (defined(__OpenBSD__) && defined(__powerpc__))
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#ifdef __OpenBSD__
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int selectors[2] = { CTL_MACHDEP, CPU_ALTIVEC };
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#else
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int selectors[2] = { CTL_HW, HW_VECTORUNIT };
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#endif
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int hasVectorUnit = 0;
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size_t length = sizeof(hasVectorUnit);
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int error = sysctl(selectors, 2, &hasVectorUnit, &length, NULL, 0);
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if (0 == error)
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altivec = (hasVectorUnit != 0);
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#elif SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
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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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asm volatile ("mtspr 256, %0\n\t" "vand %%v0, %%v0, %%v0"::"r" (-1));
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altivec = 1;
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}
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signal(SIGILL, handler);
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#endif
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return altivec;
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}
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static SDL_INLINE int
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CPU_haveMMX(void)
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{
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if (CPU_haveCPUID()) {
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return (CPU_getCPUIDFeatures() & 0x00800000);
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_have3DNow(void)
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{
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if (CPU_haveCPUID()) {
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int a, b, c, d;
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cpuid(0x80000000, a, b, c, d);
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if (a >= 0x80000001) {
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cpuid(0x80000001, a, b, c, d);
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return (d & 0x80000000);
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}
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_haveSSE(void)
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{
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if (CPU_haveCPUID()) {
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return (CPU_getCPUIDFeatures() & 0x02000000);
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_haveSSE2(void)
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{
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if (CPU_haveCPUID()) {
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return (CPU_getCPUIDFeatures() & 0x04000000);
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_haveSSE3(void)
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{
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if (CPU_haveCPUID()) {
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int a, b, c, d;
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cpuid(0, a, b, c, d);
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if (a >= 1) {
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cpuid(1, a, b, c, d);
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return (c & 0x00000001);
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}
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_haveSSE41(void)
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{
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if (CPU_haveCPUID()) {
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int a, b, c, d;
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cpuid(1, a, b, c, d);
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if (a >= 1) {
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cpuid(1, a, b, c, d);
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return (c & 0x00080000);
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}
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}
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return 0;
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}
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static SDL_INLINE int
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CPU_haveSSE42(void)
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{
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if (CPU_haveCPUID()) {
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int a, b, c, d;
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cpuid(1, a, b, c, d);
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if (a >= 1) {
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cpuid(1, a, b, c, d);
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return (c & 0x00100000);
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}
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}
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return 0;
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}
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static int SDL_CPUCount = 0;
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int
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SDL_GetCPUCount(void)
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{
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if (!SDL_CPUCount) {
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#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
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if (SDL_CPUCount <= 0) {
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SDL_CPUCount = (int)sysconf(_SC_NPROCESSORS_ONLN);
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}
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#endif
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#ifdef HAVE_SYSCTLBYNAME
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if (SDL_CPUCount <= 0) {
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size_t size = sizeof(SDL_CPUCount);
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sysctlbyname("hw.ncpu", &SDL_CPUCount, &size, NULL, 0);
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}
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#endif
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#ifdef __WIN32__
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if (SDL_CPUCount <= 0) {
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SYSTEM_INFO info;
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GetSystemInfo(&info);
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SDL_CPUCount = info.dwNumberOfProcessors;
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}
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#endif
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/* There has to be at least 1, right? :) */
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if (SDL_CPUCount <= 0) {
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SDL_CPUCount = 1;
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}
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}
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return SDL_CPUCount;
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}
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/* Oh, such a sweet sweet trick, just not very useful. :) */
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static const char *
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SDL_GetCPUType(void)
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{
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static char SDL_CPUType[13];
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if (!SDL_CPUType[0]) {
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int i = 0;
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int a, b, c, d;
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if (CPU_haveCPUID()) {
|
||
|
|
cpuid(0x00000000, a, b, c, d);
|
||
|
|
SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUType[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
}
|
||
|
|
if (!SDL_CPUType[0]) {
|
||
|
|
SDL_strlcpy(SDL_CPUType, "Unknown", sizeof(SDL_CPUType));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return SDL_CPUType;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef TEST_MAIN /* !!! FIXME: only used for test at the moment. */
|
||
|
|
static const char *
|
||
|
|
SDL_GetCPUName(void)
|
||
|
|
{
|
||
|
|
static char SDL_CPUName[48];
|
||
|
|
|
||
|
|
if (!SDL_CPUName[0]) {
|
||
|
|
int i = 0;
|
||
|
|
int a, b, c, d;
|
||
|
|
|
||
|
|
if (CPU_haveCPUID()) {
|
||
|
|
cpuid(0x80000000, a, b, c, d);
|
||
|
|
if (a >= 0x80000004) {
|
||
|
|
cpuid(0x80000002, a, b, c, d);
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
cpuid(0x80000003, a, b, c, d);
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
cpuid(0x80000004, a, b, c, d);
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(a & 0xff); a >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(b & 0xff); b >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(c & 0xff); c >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
SDL_CPUName[i++] = (char)(d & 0xff); d >>= 8;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!SDL_CPUName[0]) {
|
||
|
|
SDL_strlcpy(SDL_CPUName, "Unknown", sizeof(SDL_CPUName));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return SDL_CPUName;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int
|
||
|
|
SDL_GetCPUCacheLineSize(void)
|
||
|
|
{
|
||
|
|
const char *cpuType = SDL_GetCPUType();
|
||
|
|
|
||
|
|
if (SDL_strcmp(cpuType, "GenuineIntel") == 0) {
|
||
|
|
int a, b, c, d;
|
||
|
|
|
||
|
|
cpuid(0x00000001, a, b, c, d);
|
||
|
|
return (((b >> 8) & 0xff) * 8);
|
||
|
|
} else if (SDL_strcmp(cpuType, "AuthenticAMD") == 0) {
|
||
|
|
int a, b, c, d;
|
||
|
|
|
||
|
|
cpuid(0x80000005, a, b, c, d);
|
||
|
|
return (c & 0xff);
|
||
|
|
} else {
|
||
|
|
/* Just make a guess here... */
|
||
|
|
return SDL_CACHELINE_SIZE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
|
||
|
|
|
||
|
|
static Uint32
|
||
|
|
SDL_GetCPUFeatures(void)
|
||
|
|
{
|
||
|
|
if (SDL_CPUFeatures == 0xFFFFFFFF) {
|
||
|
|
SDL_CPUFeatures = 0;
|
||
|
|
if (CPU_haveRDTSC()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_RDTSC;
|
||
|
|
}
|
||
|
|
if (CPU_haveAltiVec()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_ALTIVEC;
|
||
|
|
}
|
||
|
|
if (CPU_haveMMX()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_MMX;
|
||
|
|
}
|
||
|
|
if (CPU_have3DNow()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_3DNOW;
|
||
|
|
}
|
||
|
|
if (CPU_haveSSE()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_SSE;
|
||
|
|
}
|
||
|
|
if (CPU_haveSSE2()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_SSE2;
|
||
|
|
}
|
||
|
|
if (CPU_haveSSE3()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_SSE3;
|
||
|
|
}
|
||
|
|
if (CPU_haveSSE41()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_SSE41;
|
||
|
|
}
|
||
|
|
if (CPU_haveSSE42()) {
|
||
|
|
SDL_CPUFeatures |= CPU_HAS_SSE42;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return SDL_CPUFeatures;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasRDTSC(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_RDTSC) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasAltiVec(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_ALTIVEC) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasMMX(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_MMX) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_Has3DNow(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_3DNOW) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasSSE(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_SSE) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasSSE2(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_SSE2) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasSSE3(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_SSE3) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasSSE41(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_SSE41) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
SDL_bool
|
||
|
|
SDL_HasSSE42(void)
|
||
|
|
{
|
||
|
|
if (SDL_GetCPUFeatures() & CPU_HAS_SSE42) {
|
||
|
|
return SDL_TRUE;
|
||
|
|
}
|
||
|
|
return SDL_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int SDL_SystemRAM = 0;
|
||
|
|
|
||
|
|
int
|
||
|
|
SDL_GetSystemRAM(void)
|
||
|
|
{
|
||
|
|
if (!SDL_SystemRAM) {
|
||
|
|
#if defined(HAVE_SYSCONF) && defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
|
||
|
|
if (SDL_SystemRAM <= 0) {
|
||
|
|
SDL_SystemRAM = (int)((Sint64)sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE) / (1024*1024));
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_SYSCTLBYNAME
|
||
|
|
if (SDL_SystemRAM <= 0) {
|
||
|
|
#ifdef __FreeBSD__
|
||
|
|
#ifdef HW_REALMEM
|
||
|
|
int mib[2] = {CTL_HW, HW_REALMEM};
|
||
|
|
#else
|
||
|
|
/* might only report up to 2 GiB */
|
||
|
|
int mib[2] = {CTL_HW, HW_PHYSMEM};
|
||
|
|
#endif /* HW_REALMEM */
|
||
|
|
#else
|
||
|
|
int mib[2] = {CTL_HW, HW_MEMSIZE};
|
||
|
|
#endif /* __FreeBSD__ */
|
||
|
|
Uint64 memsize = 0;
|
||
|
|
size_t len = sizeof(memsize);
|
||
|
|
|
||
|
|
if (sysctl(mib, 2, &memsize, &len, NULL, 0) == 0) {
|
||
|
|
SDL_SystemRAM = (int)(memsize / (1024*1024));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#ifdef __WIN32__
|
||
|
|
if (SDL_SystemRAM <= 0) {
|
||
|
|
MEMORYSTATUSEX stat;
|
||
|
|
stat.dwLength = sizeof(stat);
|
||
|
|
if (GlobalMemoryStatusEx(&stat)) {
|
||
|
|
SDL_SystemRAM = (int)(stat.ullTotalPhys / (1024 * 1024));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
return SDL_SystemRAM;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef TEST_MAIN
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
main()
|
||
|
|
{
|
||
|
|
printf("CPU count: %d\n", SDL_GetCPUCount());
|
||
|
|
printf("CPU type: %s\n", SDL_GetCPUType());
|
||
|
|
printf("CPU name: %s\n", SDL_GetCPUName());
|
||
|
|
printf("CacheLine size: %d\n", SDL_GetCPUCacheLineSize());
|
||
|
|
printf("RDTSC: %d\n", SDL_HasRDTSC());
|
||
|
|
printf("Altivec: %d\n", SDL_HasAltiVec());
|
||
|
|
printf("MMX: %d\n", SDL_HasMMX());
|
||
|
|
printf("3DNow: %d\n", SDL_Has3DNow());
|
||
|
|
printf("SSE: %d\n", SDL_HasSSE());
|
||
|
|
printf("SSE2: %d\n", SDL_HasSSE2());
|
||
|
|
printf("SSE3: %d\n", SDL_HasSSE3());
|
||
|
|
printf("SSE4.1: %d\n", SDL_HasSSE41());
|
||
|
|
printf("SSE4.2: %d\n", SDL_HasSSE42());
|
||
|
|
printf("RAM: %d MB\n", SDL_GetSystemRAM());
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* TEST_MAIN */
|
||
|
|
|
||
|
|
/* vi: set ts=4 sw=4 expandtab: */
|