Added SDL_GetCPUCount() to see how many cores are available.
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404328
This commit is contained in:
Sam Lantinga
parent
3f0f9188ed
commit
29601c280b
9 changed files with 175 additions and 183 deletions
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@ -25,6 +25,10 @@
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#include "SDL_cpuinfo.h"
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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 SDL_ALTIVEC_BLITTERS && HAVE_SETJMP
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@ -32,14 +36,14 @@
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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_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_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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#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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#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__
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/* This is the brute force way of detecting instruction sets...
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@ -59,7 +63,7 @@ CPU_haveCPUID(void)
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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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__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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@ -72,14 +76,14 @@ CPU_haveCPUID(void)
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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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: "=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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__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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@ -92,12 +96,12 @@ CPUid by definition. But it's nice to be able to prove it. :) */
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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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: "=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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__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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@ -110,24 +114,24 @@ CPUid by definition. But it's nice to be able to prove it. :) */
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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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}
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#elif defined(__sun) && defined(__i386)
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__asm (
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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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" 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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);
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#elif defined(__sun) && defined(__amd64)
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__asm (
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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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@ -140,92 +144,42 @@ done:
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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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);
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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) || defined(__x86_64__))
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#define cpuid(func, ax, bx, cx, dx) \
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__asm__ __volatile__ ("cpuid": \
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"=a" (ax), "=b" (bx), "=c" (cx), "=d" (dx) : "a" (func))
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#elif (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
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#define cpuid(func, ax, bx, cx, dx) \
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asm { \
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mov eax, func \
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cpuid
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mov ax, eax \
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mov bx, ebx \
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mov cx, ecx \
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mov dx, edx \
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}
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#else
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#define cpuid(func, ax, bx, cx, dx) \
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ax = bx = cx = dx = 0
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#endif
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static __inline__ int
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CPU_getCPUIDFeatures(void)
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{
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int features = 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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" xorl %%eax,%%eax # Set up for CPUID instruction \n"
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" pushl %%ebx \n"
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" cpuid # Get and save vendor ID \n"
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" popl %%ebx \n"
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" 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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" xorl %%eax,%%eax \n"
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" incl %%eax \n"
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" pushl %%ebx \n"
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" cpuid # Get family/model/stepping/features\n"
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" popl %%ebx \n"
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" movl %%edx,%0 \n"
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"1: \n"
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: "=m" (features)
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:
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: "%eax", "%ecx", "%edx"
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);
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#elif defined(__GNUC__) && defined(__x86_64__)
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__asm__ (
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" xorl %%eax,%%eax # Set up for CPUID instruction \n"
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" pushq %%rbx \n"
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" cpuid # Get and save vendor ID \n"
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" popq %%rbx \n"
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" 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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" xorl %%eax,%%eax \n"
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" incl %%eax \n"
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" pushq %%rbx \n"
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" cpuid # Get family/model/stepping/features\n"
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" popq %%rbx \n"
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" movl %%edx,%0 \n"
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"1: \n"
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: "=m" (features)
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:
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: "%rax", "%rcx", "%rdx"
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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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xor eax, eax ; Set up for CPUID instruction
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push ebx
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cpuid ; Get and save vendor ID
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pop ebx
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cmp eax, 1 ; Make sure 1 is valid input for CPUID
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jl done ; We dont have the CPUID instruction
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xor eax, eax
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inc eax
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push ebx
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cpuid ; Get family/model/stepping/features
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pop ebx
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mov features, edx
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done:
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}
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#elif defined(__sun) && (defined(__i386) || defined(__amd64))
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__asm(
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" xorl %eax,%eax \n"
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" pushl %ebx \n"
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" cpuid \n"
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" popl %ebx \n"
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" cmpl $1,%eax \n"
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" jl 1f \n"
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" xorl %eax,%eax \n"
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" incl %eax \n"
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" pushl %ebx \n"
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" cpuid \n"
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" popl %ebx \n"
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#ifdef __i386
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" movl %edx,-8(%ebp) \n"
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#else
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" movl %edx,-8(%rbp) \n"
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#endif
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"1: \n"
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#endif
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/* *INDENT-ON* */
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int ax, bx, cx, dx;
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cpuid(0, ax, bx, cx, dx);
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if (ax >= 1) {
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cpuid(1, ax, bx, cx, dx);
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features = dx;
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}
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return features;
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}
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@ -233,79 +187,13 @@ static __inline__ int
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CPU_getCPUIDFeaturesExt(void)
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{
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int features = 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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" movl $0x80000000,%%eax # Query for extended functions \n"
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" pushl %%ebx \n"
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" cpuid # Get extended function limit \n"
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" popl %%ebx \n"
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" cmpl $0x80000001,%%eax \n"
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" jl 1f # Nope, we dont have function 800000001h\n"
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" movl $0x80000001,%%eax # Setup extended function 800000001h\n"
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" pushl %%ebx \n"
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" cpuid # and get the information \n"
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" popl %%ebx \n"
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" movl %%edx,%0 \n"
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"1: \n"
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: "=m" (features)
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:
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: "%eax", "%ecx", "%edx"
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);
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#elif defined(__GNUC__) && defined (__x86_64__)
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__asm__ (
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" movl $0x80000000,%%eax # Query for extended functions \n"
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" pushq %%rbx \n"
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" cpuid # Get extended function limit \n"
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" popq %%rbx \n"
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" cmpl $0x80000001,%%eax \n"
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" jl 1f # Nope, we dont have function 800000001h\n"
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" movl $0x80000001,%%eax # Setup extended function 800000001h\n"
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" pushq %%rbx \n"
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" cpuid # and get the information \n"
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" popq %%rbx \n"
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" movl %%edx,%0 \n"
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"1: \n"
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: "=m" (features)
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:
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: "%rax", "%rcx", "%rdx"
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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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mov eax,80000000h ; Query for extended functions
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push ebx
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cpuid ; Get extended function limit
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pop ebx
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cmp eax,80000001h
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jl done ; Nope, we dont have function 800000001h
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mov eax,80000001h ; Setup extended function 800000001h
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push ebx
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cpuid ; and get the information
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pop ebx
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mov features,edx
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done:
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}
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#elif defined(__sun) && ( defined(__i386) || defined(__amd64) )
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__asm (
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" movl $0x80000000,%eax \n"
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" pushl %ebx \n"
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" cpuid \n"
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" popl %ebx \n"
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" cmpl $0x80000001,%eax \n"
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" jl 1f \n"
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" movl $0x80000001,%eax \n"
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" pushl %ebx \n"
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" cpuid \n"
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" popl %ebx \n"
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#ifdef __i386
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" movl %edx,-8(%ebp) \n"
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#else
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" movl %edx,-8(%rbp) \n"
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#endif
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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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int ax, bx, cx, dx;
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cpuid(0x80000000, ax, bx, cx, dx);
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if (ax >= 0x80000001) {
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cpuid(0x80000001, ax, bx, cx, dx);
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features = dx;
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}
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return features;
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}
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@ -395,6 +283,97 @@ CPU_haveAltiVec(void)
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return altivec;
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}
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static int SDL_CPUCount = 0;
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int
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SDL_GetCPUCount()
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{
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if (!SDL_CPUCount) {
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#ifdef HAVE_SYSCTLBYNAME
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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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#endif
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/* There has to be at least 1, right? :) */
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if (!SDL_CPUCount) {
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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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const char *
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SDL_GetCPUType()
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{
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static char SDL_CPUType[48];
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if (!SDL_CPUType[0]) {
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int i = 0;
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int ax, bx, cx, dx;
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if (CPU_haveCPUID()) {
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cpuid(0x80000000, ax, bx, cx, dx);
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if (ax >= 0x80000004) {
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cpuid(0x80000002, ax, bx, cx, dx);
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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cpuid(0x80000003, ax, bx, cx, dx);
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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cpuid(0x80000004, ax, bx, cx, dx);
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(ax & 0xff); ax >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(bx & 0xff); bx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(cx & 0xff); cx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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SDL_CPUType[i++] = (char)(dx & 0xff); dx >>= 8;
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}
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}
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if (!SDL_CPUType[0]) {
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SDL_strlcpy(SDL_CPUType, "Unknown", sizeof(SDL_CPUType));
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}
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}
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return SDL_CPUType;
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}
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static Uint32 SDL_CPUFeatures = 0xFFFFFFFF;
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static Uint32
|
||||
|
|
@ -509,6 +488,8 @@ SDL_HasAltiVec(void)
|
|||
int
|
||||
main()
|
||||
{
|
||||
printf("CPU count: %d\n", SDL_GetCPUCount());
|
||||
printf("CPU name: %s\n", SDL_GetCPUType());
|
||||
printf("RDTSC: %d\n", SDL_HasRDTSC());
|
||||
printf("MMX: %d\n", SDL_HasMMX());
|
||||
printf("MMXExt: %d\n", SDL_HasMMXExt());
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue