mirror of https://github.com/VDR4Arch/vdr.git
130 lines
2.6 KiB
C
130 lines
2.6 KiB
C
/*****
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*
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* This file is part of the OMS program.
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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, or (at your option)
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*****/
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#include <inttypes.h>
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#include "mm_accel.h"
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//#ifdef __i386__
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#if 0
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#ifdef __PIC__
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#define cpuid(op, eax, ebx, ecx, edx) \
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__asm__ __volatile__ ("pushl %%ebx\n\t" \
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"cpuid\n\t" \
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"movl %%ebx, %%esi\n\t" \
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"popl %%ebx" \
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: "=a" (eax), \
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"=S" (ebx), \
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"=c" (ecx), \
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"=d" (edx) \
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: "a" (op) \
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: "cc")
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#else
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#define cpuid(op, eax, ebx, ecx, edx) \
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__asm__("cpuid" \
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: "=a" (eax), \
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"=b" (ebx), \
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"=c" (ecx), \
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"=d" (edx) \
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: "a" (op) \
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: "cc")
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#endif
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static inline int has_cpuid ()
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{
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return 1;
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/*
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uint32_t eax, ebx;
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asm ("pushfl\n\t"
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"popl %0\n\t"
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"movl %0,%1\n\t"
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"xorl $0x200000,%0\n\t"
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"pushl %0\n\t"
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"popfl\n\t"
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"pushfl\n\t"
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"popl %0"
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: "=a" (eax),
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"=b" (ebx)
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:
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: "cc");
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return (eax != ebx);
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*/
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}
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static uint32_t x86_accel (void)
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{
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uint32_t eax, ebx, ecx, edx;
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int AMD;
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uint32_t caps;
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if (!has_cpuid ()) // no cpuid
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return 0;
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cpuid (0x00000000, eax, ebx, ecx, edx);
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if (!eax) // vendor string only
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return 0;
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AMD = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
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cpuid (0x00000001, eax, ebx, ecx, edx);
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if (! (edx & 0x00800000)) // no MMX
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return 0;
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caps = OMS_ACCEL_X86_MMX;
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if (edx & 0x02000000) // SSE - identical to AMD MMX extensions
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caps = OMS_ACCEL_X86_MMX | OMS_ACCEL_X86_MMXEXT;
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cpuid (0x80000000, eax, ebx, ecx, edx);
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if (eax < 0x80000001) // no extended capabilities
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return caps;
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cpuid (0x80000001, eax, ebx, ecx, edx);
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if (edx & 0x80000000)
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caps |= OMS_ACCEL_X86_3DNOW;
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if (AMD && (edx & 0x00400000)) // AMD MMX extensions
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caps |= OMS_ACCEL_X86_MMXEXT;
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return caps;
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}
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#endif
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uint32_t mm_accel (void)
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{
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//#ifdef __i386__
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#if 0
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static int got_accel = 0;
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static uint32_t accel;
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if (!got_accel) {
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got_accel = 1;
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accel = x86_accel ();
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}
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return accel;
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#else
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return 0;
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#endif
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}
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