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PIKApp/libpikabase/pikacpuaccel.c

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/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
/*
* x86 bits Copyright (C) Manish Singh <yosh@gimp.org>
*/
/*
* PPC CPU acceleration detection was taken from DirectFB but seems to be
* originating from mpeg2dec with the following copyright:
*
* Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*/
#include "config.h"
#include <string.h>
#include <signal.h>
#include <setjmp.h>
#include <glib.h>
#include "pikacpuaccel.h"
/**
* SECTION: pikacpuaccel
* @title: pikacpuaccel
* @short_description: Functions to query and configure CPU acceleration.
*
* Functions to query and configure CPU acceleration.
**/
static PikaCpuAccelFlags cpu_accel (void) G_GNUC_CONST;
static gboolean use_cpu_accel = TRUE;
/**
* pika_cpu_accel_get_support:
*
* Query for CPU acceleration support.
*
* Returns: #PikaCpuAccelFlags as supported by the CPU.
*
* Since: 2.4
*/
PikaCpuAccelFlags
pika_cpu_accel_get_support (void)
{
return use_cpu_accel ? cpu_accel () : PIKA_CPU_ACCEL_NONE;
}
/**
* pika_cpu_accel_set_use:
* @use: whether to use CPU acceleration features or not
*
* This function is for internal use only.
*
* Since: 2.4
*/
void
pika_cpu_accel_set_use (gboolean use)
{
use_cpu_accel = use ? TRUE : FALSE;
}
#if defined(ARCH_X86) && defined(USE_MMX) && defined(__GNUC__)
#define HAVE_ACCEL 1
typedef enum
{
ARCH_X86_VENDOR_NONE,
ARCH_X86_VENDOR_INTEL,
ARCH_X86_VENDOR_AMD,
ARCH_X86_VENDOR_CENTAUR,
ARCH_X86_VENDOR_CYRIX,
ARCH_X86_VENDOR_NSC,
ARCH_X86_VENDOR_TRANSMETA,
ARCH_X86_VENDOR_NEXGEN,
ARCH_X86_VENDOR_RISE,
ARCH_X86_VENDOR_UMC,
ARCH_X86_VENDOR_SIS,
ARCH_X86_VENDOR_HYGON,
ARCH_X86_VENDOR_UNKNOWN = 0xff
} X86Vendor;
enum
{
ARCH_X86_INTEL_FEATURE_MMX = 1 << 23,
ARCH_X86_INTEL_FEATURE_XMM = 1 << 25,
ARCH_X86_INTEL_FEATURE_XMM2 = 1 << 26,
ARCH_X86_AMD_FEATURE_MMXEXT = 1 << 22,
ARCH_X86_AMD_FEATURE_3DNOW = 1 << 31,
ARCH_X86_CENTAUR_FEATURE_MMX = 1 << 23,
ARCH_X86_CENTAUR_FEATURE_MMXEXT = 1 << 24,
ARCH_X86_CENTAUR_FEATURE_3DNOW = 1 << 31,
ARCH_X86_CYRIX_FEATURE_MMX = 1 << 23,
ARCH_X86_CYRIX_FEATURE_MMXEXT = 1 << 24
};
enum
{
ARCH_X86_INTEL_FEATURE_PNI = 1 << 0,
ARCH_X86_INTEL_FEATURE_SSSE3 = 1 << 9,
ARCH_X86_INTEL_FEATURE_SSE4_1 = 1 << 19,
ARCH_X86_INTEL_FEATURE_SSE4_2 = 1 << 20,
ARCH_X86_INTEL_FEATURE_AVX = 1 << 28
};
#if !defined(ARCH_X86_64) && (defined(PIC) || defined(__PIC__))
#define cpuid(op,eax,ebx,ecx,edx) \
__asm__ ("movl %%ebx, %%esi\n\t" \
"cpuid\n\t" \
"xchgl %%ebx,%%esi" \
: "=a" (eax), \
"=S" (ebx), \
"=c" (ecx), \
"=d" (edx) \
: "0" (op))
#else
#define cpuid(op,eax,ebx,ecx,edx) \
__asm__ ("cpuid" \
: "=a" (eax), \
"=b" (ebx), \
"=c" (ecx), \
"=d" (edx) \
: "0" (op))
#endif
static X86Vendor
arch_get_vendor (void)
{
guint32 eax, ebx, ecx, edx;
union{
gchar idaschar[16];
int idasint[4];
}id;
#ifndef ARCH_X86_64
/* Only need to check this on ia32 */
__asm__ ("pushfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"movl %0,%1\n\t"
"xorl $0x200000,%0\n\t"
"pushl %0\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %0\n\t"
"popfl"
: "=a" (eax),
"=c" (ecx)
:
: "cc");
if (eax == ecx)
return ARCH_X86_VENDOR_NONE;
#endif
cpuid (0, eax, ebx, ecx, edx);
if (eax == 0)
return ARCH_X86_VENDOR_NONE;
id.idasint[0] = ebx;
id.idasint[1] = edx;
id.idasint[2] = ecx;
id.idaschar[12] = '\0';
#ifdef ARCH_X86_64
if (strcmp (id.idaschar, "AuthenticAMD") == 0)
return ARCH_X86_VENDOR_AMD;
else if (strcmp (id.idaschar, "HygonGenuine") == 0)
return ARCH_X86_VENDOR_HYGON;
else if (strcmp (id.idaschar, "GenuineIntel") == 0)
return ARCH_X86_VENDOR_INTEL;
#else
if (strcmp (id.idaschar, "GenuineIntel") == 0)
return ARCH_X86_VENDOR_INTEL;
else if (strcmp (id.idaschar, "AuthenticAMD") == 0)
return ARCH_X86_VENDOR_AMD;
else if (strcmp (id.idaschar, "HygonGenuine") == 0)
return ARCH_X86_VENDOR_HYGON;
else if (strcmp (id.idaschar, "CentaurHauls") == 0)
return ARCH_X86_VENDOR_CENTAUR;
else if (strcmp (id.idaschar, "CyrixInstead") == 0)
return ARCH_X86_VENDOR_CYRIX;
else if (strcmp (id.idaschar, "Geode by NSC") == 0)
return ARCH_X86_VENDOR_NSC;
else if (strcmp (id.idaschar, "GenuineTMx86") == 0 ||
strcmp (id.idaschar, "TransmetaCPU") == 0)
return ARCH_X86_VENDOR_TRANSMETA;
else if (strcmp (id.idaschar, "NexGenDriven") == 0)
return ARCH_X86_VENDOR_NEXGEN;
else if (strcmp (id.idaschar, "RiseRiseRise") == 0)
return ARCH_X86_VENDOR_RISE;
else if (strcmp (id.idaschar, "UMC UMC UMC ") == 0)
return ARCH_X86_VENDOR_UMC;
else if (strcmp (id.idaschar, "SiS SiS SiS ") == 0)
return ARCH_X86_VENDOR_SIS;
#endif
return ARCH_X86_VENDOR_UNKNOWN;
}
static guint32
arch_accel_intel (void)
{
guint32 caps = 0;
#ifdef USE_MMX
{
guint32 eax, ebx, ecx, edx;
cpuid (1, eax, ebx, ecx, edx);
if ((edx & ARCH_X86_INTEL_FEATURE_MMX) == 0)
return 0;
caps = PIKA_CPU_ACCEL_X86_MMX;
#ifdef USE_SSE
if (edx & ARCH_X86_INTEL_FEATURE_XMM)
caps |= PIKA_CPU_ACCEL_X86_SSE | PIKA_CPU_ACCEL_X86_MMXEXT;
if (edx & ARCH_X86_INTEL_FEATURE_XMM2)
caps |= PIKA_CPU_ACCEL_X86_SSE2;
if (ecx & ARCH_X86_INTEL_FEATURE_PNI)
caps |= PIKA_CPU_ACCEL_X86_SSE3;
if (ecx & ARCH_X86_INTEL_FEATURE_SSSE3)
caps |= PIKA_CPU_ACCEL_X86_SSSE3;
if (ecx & ARCH_X86_INTEL_FEATURE_SSE4_1)
caps |= PIKA_CPU_ACCEL_X86_SSE4_1;
if (ecx & ARCH_X86_INTEL_FEATURE_SSE4_2)
caps |= PIKA_CPU_ACCEL_X86_SSE4_2;
if (ecx & ARCH_X86_INTEL_FEATURE_AVX)
caps |= PIKA_CPU_ACCEL_X86_AVX;
#endif /* USE_SSE */
}
#endif /* USE_MMX */
return caps;
}
static guint32
arch_accel_amd (void)
{
guint32 caps;
caps = arch_accel_intel ();
#ifdef USE_MMX
{
guint32 eax, ebx, ecx, edx;
cpuid (0x80000000, eax, ebx, ecx, edx);
if (eax < 0x80000001)
return caps;
#ifdef USE_SSE
cpuid (0x80000001, eax, ebx, ecx, edx);
if (edx & ARCH_X86_AMD_FEATURE_3DNOW)
caps |= PIKA_CPU_ACCEL_X86_3DNOW;
if (edx & ARCH_X86_AMD_FEATURE_MMXEXT)
caps |= PIKA_CPU_ACCEL_X86_MMXEXT;
#endif /* USE_SSE */
}
#endif /* USE_MMX */
return caps;
}
static guint32
arch_accel_centaur (void)
{
guint32 caps;
caps = arch_accel_intel ();
#ifdef USE_MMX
{
guint32 eax, ebx, ecx, edx;
cpuid (0x80000000, eax, ebx, ecx, edx);
if (eax < 0x80000001)
return caps;
cpuid (0x80000001, eax, ebx, ecx, edx);
if (edx & ARCH_X86_CENTAUR_FEATURE_MMX)
caps |= PIKA_CPU_ACCEL_X86_MMX;
#ifdef USE_SSE
if (edx & ARCH_X86_CENTAUR_FEATURE_3DNOW)
caps |= PIKA_CPU_ACCEL_X86_3DNOW;
if (edx & ARCH_X86_CENTAUR_FEATURE_MMXEXT)
caps |= PIKA_CPU_ACCEL_X86_MMXEXT;
#endif /* USE_SSE */
}
#endif /* USE_MMX */
return caps;
}
static guint32
arch_accel_cyrix (void)
{
guint32 caps;
caps = arch_accel_intel ();
#ifdef USE_MMX
{
guint32 eax, ebx, ecx, edx;
cpuid (0, eax, ebx, ecx, edx);
if (eax != 2)
return caps;
cpuid (0x80000001, eax, ebx, ecx, edx);
if (edx & ARCH_X86_CYRIX_FEATURE_MMX)
caps |= PIKA_CPU_ACCEL_X86_MMX;
#ifdef USE_SSE
if (edx & ARCH_X86_CYRIX_FEATURE_MMXEXT)
caps |= PIKA_CPU_ACCEL_X86_MMXEXT;
#endif /* USE_SSE */
}
#endif /* USE_MMX */
return caps;
}
#ifdef USE_SSE
static jmp_buf sigill_return;
static void
sigill_handler (gint n)
{
longjmp (sigill_return, 1);
}
static gboolean
arch_accel_sse_os_support (void)
{
if (setjmp (sigill_return))
{
return FALSE;
}
else
{
signal (SIGILL, sigill_handler);
__asm__ __volatile__ ("xorps %xmm0, %xmm0");
signal (SIGILL, SIG_DFL);
}
return TRUE;
}
#endif /* USE_SSE */
static guint32
arch_accel (void)
{
guint32 caps;
X86Vendor vendor;
vendor = arch_get_vendor ();
switch (vendor)
{
case ARCH_X86_VENDOR_NONE:
caps = 0;
break;
case ARCH_X86_VENDOR_AMD:
case ARCH_X86_VENDOR_HYGON:
caps = arch_accel_amd ();
break;
case ARCH_X86_VENDOR_CENTAUR:
caps = arch_accel_centaur ();
break;
case ARCH_X86_VENDOR_CYRIX:
case ARCH_X86_VENDOR_NSC:
caps = arch_accel_cyrix ();
break;
/* check for what Intel speced, even if UNKNOWN */
default:
caps = arch_accel_intel ();
break;
}
#ifdef USE_SSE
if ((caps & PIKA_CPU_ACCEL_X86_SSE) && !arch_accel_sse_os_support ())
caps &= ~(PIKA_CPU_ACCEL_X86_SSE | PIKA_CPU_ACCEL_X86_SSE2);
#endif
return caps;
}
#endif /* ARCH_X86 && USE_MMX && __GNUC__ */
#if defined(ARCH_PPC) && defined (USE_ALTIVEC)
#if defined(HAVE_ALTIVEC_SYSCTL)
#include <sys/sysctl.h>
#define HAVE_ACCEL 1
static guint32
arch_accel (void)
{
gint sels[2] = { CTL_HW, HW_VECTORUNIT };
gboolean has_vu = FALSE;
gsize length = sizeof(has_vu);
gint err;
err = sysctl (sels, 2, &has_vu, &length, NULL, 0);
if (err == 0 && has_vu)
return PIKA_CPU_ACCEL_PPC_ALTIVEC;
return 0;
}
#elif defined(__GNUC__)
#define HAVE_ACCEL 1
static sigjmp_buf jmpbuf;
static volatile sig_atomic_t canjump = 0;
static void
sigill_handler (gint sig)
{
if (!canjump)
{
signal (sig, SIG_DFL);
raise (sig);
}
canjump = 0;
siglongjmp (jmpbuf, 1);
}
static guint32
arch_accel (void)
{
signal (SIGILL, sigill_handler);
if (sigsetjmp (jmpbuf, 1))
{
signal (SIGILL, SIG_DFL);
return 0;
}
canjump = 1;
asm volatile ("mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1));
signal (SIGILL, SIG_DFL);
return PIKA_CPU_ACCEL_PPC_ALTIVEC;
}
#endif /* __GNUC__ */
#endif /* ARCH_PPC && USE_ALTIVEC */
static PikaCpuAccelFlags
cpu_accel (void)
{
#ifdef HAVE_ACCEL
static guint32 accel = ~0U;
if (accel != ~0U)
return accel;
accel = arch_accel ();
return (PikaCpuAccelFlags) accel;
#else /* !HAVE_ACCEL */
return PIKA_CPU_ACCEL_NONE;
#endif
}
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