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https://github.com/kanjitalk755/macemu.git
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Move processor capability information to utils-cpuinfo.[ch]hpp. Add new
utils-sentinel.hpp for helper functions to be called at program initialization and termination.
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137
SheepShaver/src/kpx_cpu/src/utils/utils-cpuinfo.cpp
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137
SheepShaver/src/kpx_cpu/src/utils/utils-cpuinfo.cpp
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/*
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* utils-cpuinfo.cpp - Processor capability information
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*
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* Kheperix (C) 2003-2005 Gwenole Beauchesne
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sysdeps.h"
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#include "utils/utils-cpuinfo.hpp"
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#include "utils/utils-sentinel.hpp"
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// x86 CPU features
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static uint32 x86_cpu_features = 0;
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enum {
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HWCAP_I386_CMOV = 1 << 15,
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HWCAP_I386_MMX = 1 << 23,
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HWCAP_I386_SSE = 1 << 25,
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HWCAP_I386_SSE2 = 1 << 26,
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HWCAP_I386_EDX_FLAGS = (HWCAP_I386_CMOV|HWCAP_I386_MMX|HWCAP_I386_SSE|HWCAP_I386_SSE2),
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HWCAP_I386_SSE3 = 1 << 0,
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HWCAP_I386_SSE4 = 1 << 9,
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HWCAP_I386_ECX_FLAGS = (HWCAP_I386_SSE3|HWCAP_I386_SSE4),
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};
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// Determine x86 CPU features
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DEFINE_INIT_SENTINEL(init_x86_cpu_features);
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static void init_x86_cpu_features(void)
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{
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#if defined(__i386__) || defined(__x86_64__)
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unsigned int fl1, fl2;
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#ifndef __x86_64__
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/* See if we can use cpuid. On AMD64 we always can. */
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__asm__ ("pushfl; pushfl; popl %0; movl %0,%1; xorl %2,%0;"
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"pushl %0; popfl; pushfl; popl %0; popfl"
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: "=&r" (fl1), "=&r" (fl2)
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: "i" (0x00200000));
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if (((fl1 ^ fl2) & 0x00200000) == 0)
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return;
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#endif
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/* Host supports cpuid. See if cpuid gives capabilities, try
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CPUID(0). Preserve %ebx and %ecx; cpuid insn clobbers these, we
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don't need their CPUID values here, and %ebx may be the PIC
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register. */
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#ifdef __x86_64__
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__asm__ ("pushq %%rcx; pushq %%rbx; cpuid; popq %%rbx; popq %%rcx"
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: "=a" (fl1) : "0" (0) : "rdx", "cc");
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#else
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__asm__ ("push %%ecx ; push %%ebx ; cpuid ; pop %%ebx ; pop %%ecx"
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: "=a" (fl1) : "0" (0) : "edx", "cc");
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#endif
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if (fl1 == 0)
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return;
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/* Invoke CPUID(1), return %edx; caller can examine bits to
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determine what's supported. */
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#ifdef __x86_64__
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__asm__ ("push %%rbx ; cpuid ; pop %%rbx" : "=c" (fl1), "=d" (fl2) : "a" (1) : "cc");
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#else
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__asm__ ("push %%ebx ; cpuid ; pop %%ebx" : "=c" (fl1), "=d" (fl2) : "a" (1) : "cc");
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#endif
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x86_cpu_features = (fl1 & HWCAP_I386_ECX_FLAGS) | (fl2 & HWCAP_I386_EDX_FLAGS);
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#endif
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}
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// Check for x86 feature CMOV
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bool cpuinfo_check_cmov(void)
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{
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return x86_cpu_features & HWCAP_I386_CMOV;
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}
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// Check for x86 feature MMX
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bool cpuinfo_check_mmx(void)
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{
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return x86_cpu_features & HWCAP_I386_MMX;
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}
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// Check for x86 feature SSE
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bool cpuinfo_check_sse(void)
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{
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return x86_cpu_features & HWCAP_I386_SSE;
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}
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// Check for x86 feature SSE2
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bool cpuinfo_check_sse2(void)
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{
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return x86_cpu_features & HWCAP_I386_SSE2;
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}
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// Check for x86 feature SSE3
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bool cpuinfo_check_sse3(void)
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{
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return x86_cpu_features & HWCAP_I386_SSE3;
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}
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// Check for x86 feature SSE4
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bool cpuinfo_check_sse4(void)
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{
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return x86_cpu_features & HWCAP_I386_SSE4;
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}
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// PowerPC CPU features
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static uint32 ppc_cpu_features = 0;
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enum {
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HWCAP_PPC_ALTIVEC = 1 << 0
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};
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// Determine PowerPC CPU features
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DEFINE_INIT_SENTINEL(init_ppc_cpu_features);
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static void init_ppc_cpu_features(void)
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{
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}
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// Check for ppc feature VMX (Altivec)
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bool cpuinfo_check_altivec(void)
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{
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return ppc_cpu_features & HWCAP_PPC_ALTIVEC;
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}
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45
SheepShaver/src/kpx_cpu/src/utils/utils-cpuinfo.hpp
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45
SheepShaver/src/kpx_cpu/src/utils/utils-cpuinfo.hpp
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@ -0,0 +1,45 @@
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/*
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* utils-cpuinfo.hpp - Processor capability information
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*
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* Kheperix (C) 2003-2005 Gwenole Beauchesne
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef UTILS_CPUINFO_H
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#define UTILS_CPUINFO_H
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// Check for x86 feature CMOV
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extern bool cpuinfo_check_cmov(void);
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// Check for x86 feature MMX
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extern bool cpuinfo_check_mmx(void);
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// Check for x86 feature SSE
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extern bool cpuinfo_check_sse(void);
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// Check for x86 feature SSE2
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extern bool cpuinfo_check_sse2(void);
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// Check for x86 feature SSE3
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extern bool cpuinfo_check_sse3(void);
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// Check for x86 feature SSE4
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extern bool cpuinfo_check_sse4(void);
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// Check for ppc feature VMX (Altivec)
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extern bool cpuinfo_check_altivec(void);
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#endif /* UTILS_CPUINFO_H */
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47
SheepShaver/src/kpx_cpu/src/utils/utils-sentinel.hpp
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47
SheepShaver/src/kpx_cpu/src/utils/utils-sentinel.hpp
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@ -0,0 +1,47 @@
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/*
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* utils-sentinel.hpp - Helper functions for program initialization and termination
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*
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* Kheperix (C) 2003-2005 Gwenole Beauchesne
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef UTILS_SENTINEL_H
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#define UTILS_SENTINEL_H
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class program_sentinel {
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void (*fini)(void);
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public:
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program_sentinel(void (*init_func)(void) = 0, void (*exit_func)(void) = 0)
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: fini(exit_func)
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{ if (init_func) init_func(); }
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~program_sentinel()
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{ if (fini) fini(); }
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};
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#define DEFINE_INIT_SENTINEL(FUNCTION) \
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static void FUNCTION(void); \
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static program_sentinel g_program_init_sentinel__##FUNCTION(FUNCTION)
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#define DEFINE_EXIT_SENTINEL(FUNCTION) \
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static void FUNCTION(void); \
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static program_sentinel g_program_exit_sentinel__##FUNCTION(0, FUNCTION)
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#define DEFINE_PROG_SENTINEL(FUNCTION) \
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static void init_##FUNCTION(void); \
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static void exit_##FUNCTION(void); \
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static program_sentinel g_program_sentinel_##FUNCTION(init_##FUNCTION, exit_##FUNCTION)
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#endif /* UTILS_SENTINEL_H */
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