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Diffstat (limited to 'volk/lib/cpuid_x86_64.S')
| -rw-r--r-- | volk/lib/cpuid_x86_64.S | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/volk/lib/cpuid_x86_64.S b/volk/lib/cpuid_x86_64.S new file mode 100644 index 000000000..32b1847cd --- /dev/null +++ b/volk/lib/cpuid_x86_64.S @@ -0,0 +1,54 @@ +# +# Copyright 2003,2005 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. +# + +# +# execute CPUID instruction, return EAX, EBX, ECX and EDX values in result +# +# void cpuid_x86 (unsigned int op, unsigned int result[4]); +# + +#include "assembly.h" + +.file "cpuid_x86_64.S" + .version "01.01" +.text +.globl GLOB_SYMB(cpuid_x86) + DEF_FUNC_HEAD(cpuid_x86) +GLOB_SYMB(cpuid_x86): + mov %rbx, %r11 # must save in PIC mode, holds GOT pointer + + mov %rdi, %rax # op + cpuid + movl %eax, 0(%rsi) # result + movl %ebx, 4(%rsi) + movl %ecx, 8(%rsi) + movl %edx, 12(%rsi) + + mov %r11, %rbx + retq + +FUNC_TAIL(cpuid_x86) + .ident "Hand coded cpuid64 assembly" + + +#if defined(__linux__) && defined(__ELF__) +.section .note.GNU-stack,"",%progbits +#endif |