QPQ-AG/libsodium
12
0
Fork 0
mirror of https://github.com/jedisct1/libsodium.git synced 2026-08-25 08:37:13 +09:00
Code Issues Packages Projects Releases Wiki Activity

Sync autoconf cpuid detection code

Browse Source
This commit is contained in:
Frank Denis
2014-05-02 21:24:31 -07:00
parent f8c49ac54f
commit dc5dbae12f
1 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
configure.ac
+5 -2
View File
@@ -324,8 +324,11 @@ HAVE_CPUID_V=0
AS_IF([test "$enable_asm" != "no"],[
AC_MSG_CHECKING(for cpuid instruction)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ ]], [[
unsigned int a;
__asm__ __volatile__("cpuid" : "=a" (a) : "a" (0U), "c" (0U));
unsigned int cpu_info[4];
__asm__ __volatile__ ("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1" :
"=a" (cpu_info[0]), "=&r" (cpu_info[1]),
"=c" (cpu_info[2]), "=d" (cpu_info[3]) :
"0" (cpu_info_type), "2" (0U));
]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_CPUID], [1], [cpuid instruction is available])