diff options
Diffstat (limited to 'volk/tmpl/volk_cpu.tmpl.c')
| -rw-r--r-- | volk/tmpl/volk_cpu.tmpl.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/volk/tmpl/volk_cpu.tmpl.c b/volk/tmpl/volk_cpu.tmpl.c new file mode 100644 index 000000000..dc24309f7 --- /dev/null +++ b/volk/tmpl/volk_cpu.tmpl.c @@ -0,0 +1,170 @@ +/* + * Copyright 2011-2012 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#include <volk/volk_cpu.h> +#include <volk/volk_config_fixed.h> + +struct VOLK_CPU volk_cpu; + +#if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64) +# define VOLK_CPU_x86 +#endif + +#if defined(VOLK_CPU_x86) + +//implement get cpuid for gcc compilers using a copy of cpuid.h +#if defined(__GNUC__) +#include <gcc_x86_cpuid.h> +#define cpuid_x86(op, r) __get_cpuid(op, (unsigned int *)r+0, (unsigned int *)r+1, (unsigned int *)r+2, (unsigned int *)r+3) + +//implement get cpuid for MSVC compilers using __cpuid intrinsic +#elif defined(_MSC_VER) +#include <intrin.h> +#define cpuid_x86(op, r) __cpuid(r, op) + +#else +#error "A get cpuid for volk is not available on this compiler..." +#endif + +static inline unsigned int cpuid_eax(unsigned int op) { + int regs[4]; + cpuid_x86 (op, regs); + return regs[0]; +} + +static inline unsigned int cpuid_ebx(unsigned int op) { + int regs[4]; + cpuid_x86 (op, regs); + return regs[1]; +} + +static inline unsigned int cpuid_ecx(unsigned int op) { + int regs[4]; + cpuid_x86 (op, regs); + return regs[2]; +} + +static inline unsigned int cpuid_edx(unsigned int op) { + int regs[4]; + cpuid_x86 (op, regs); + return regs[3]; +} +#endif + +#if defined(__arm__) && defined(__linux__) +#include <asm/hwcap.h> +#include <linux/auxvec.h> +#include <stdio.h> +#define LOOK_FOR_NEON +#endif + +static int has_neon(void){ +#ifdef LOOK_FOR_NEON + FILE *auxvec_f; + unsigned long auxvec[2]; + unsigned int found_neon = 0; + auxvec_f = fopen("/proc/self/auxv", "rb"); + if(!auxvec_f) return 0; + + //so auxv is basically 32b of ID and 32b of value + //so it goes like this + while(!found_neon && auxvec_f) { + fread(auxvec, sizeof(unsigned long), 2, auxvec_f); + if((auxvec[0] == AT_HWCAP) && (auxvec[1] & HWCAP_NEON)) + found_neon = 1; + } + + fclose(auxvec_f); + return found_neon; + +#else + return 0; +} + +static int has_ppc(void){ +#ifdef __PPC__ + return 1; +#else + return 0; +#endif +} + +#for $arch in $archs +static int i_can_has_$arch.name () { +######################################################################## + #if $arch.type == "x86" and $arch.no_test +#if defined(VOLK_CPU_x86) + return 1; +#else + return 0; +#endif +######################################################################## + #else if $arch.op == 1 +#if defined(VOLK_CPU_x86) + #set $op = hex($arch.op) + unsigned int e$(arch.reg)x = cpuid_e$(arch.reg)x ($op); + return ((e$(arch.reg)x >> $arch.shift) & 1) == $arch.val; +#else + return 0; +#endif +######################################################################## + #else if $arch.op == 0x80000001 +#if defined(VOLK_CPU_x86) + #set $op = hex($arch.op) + unsigned int extended_fct_count = cpuid_eax($op); + if (extended_fct_count < $op) + return $(arch.val)^1; + unsigned int extended_features = cpuid_e$(arch.reg)x ($op); + return ((extended_features >> $arch.shift) & 1) == $arch.val; +#else + return 0; +#endif +######################################################################## + #else if $arch.type == "powerpc" + return has_ppc(); +######################################################################## + #else if $arch.type == "arm" + return has_neon(); +######################################################################## + #else if $arch.type == "all" + return 1; +######################################################################## + #else ##$ + return 0; + #end if +} + +#end for + +void volk_cpu_init() { + #for $arch in $archs + volk_cpu.has_$arch.name = &i_can_has_$arch.name; + #end for +} + +unsigned int volk_get_lvarch() { + unsigned int retval = 0; + volk_cpu_init(); + #for $arch in $archs + retval += volk_cpu.has_$(arch.name)() << LV_$(arch.name.upper()); + #end for + return retval; +} |