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libgimpbase: avoid aliasing error 

Avoid aliasing error by using a union for id instead of casting
address to a int*.
This commit is contained in:
Patrick Horgan 2010-10-02 19:32:31 -07:00 committed by Sven Neumann
parent 185deee3b2
commit 69604ef12d
1 changed files with 21 additions and 18 deletions
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39
libgimpbase/gimpcpuaccel.c
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@ -151,7 +151,10 @@ static X86Vendor
arch_get_vendor (void)
{
guint32 eax, ebx, ecx, edx;
gchar id[16];
union{
gchar idaschar[16];
int idasint[4];
}id;
#ifndef ARCH_X86_64
/* Only need to check this on ia32 */
@ -179,38 +182,38 @@ arch_get_vendor (void)
if (eax == 0)
return ARCH_X86_VENDOR_NONE;
*(int *)&id[0] = ebx;
*(int *)&id[4] = edx;
*(int *)&id[8] = ecx;
id.idasint[0] = ebx;
id.idasint[1] = edx;
id.idasint[2] = ecx;
id[12] = '\0';
id.idaschar[12] = '\0';
#ifdef ARCH_X86_64
if (strcmp (id, "AuthenticAMD") == 0)
if (strcmp (id.idaschar, "AuthenticAMD") == 0)
return ARCH_X86_VENDOR_AMD;
else if (strcmp (id, "GenuineIntel") == 0)
else if (strcmp (id.idaschar, "GenuineIntel") == 0)
return ARCH_X86_VENDOR_INTEL;
#else
if (strcmp (id, "GenuineIntel") == 0)
if (strcmp (id.idaschar, "GenuineIntel") == 0)
return ARCH_X86_VENDOR_INTEL;
else if (strcmp (id, "AuthenticAMD") == 0)
else if (strcmp (id.idaschar, "AuthenticAMD") == 0)
return ARCH_X86_VENDOR_AMD;
else if (strcmp (id, "CentaurHauls") == 0)
else if (strcmp (id.idaschar, "CentaurHauls") == 0)
return ARCH_X86_VENDOR_CENTAUR;
else if (strcmp (id, "CyrixInstead") == 0)
else if (strcmp (id.idaschar, "CyrixInstead") == 0)
return ARCH_X86_VENDOR_CYRIX;
else if (strcmp (id, "Geode by NSC") == 0)
else if (strcmp (id.idaschar, "Geode by NSC") == 0)
return ARCH_X86_VENDOR_NSC;
else if (strcmp (id, "GenuineTMx86") == 0 ||
strcmp (id, "TransmetaCPU") == 0)
else if (strcmp (id.idaschar, "GenuineTMx86") == 0 ||
strcmp (id.idaschar, "TransmetaCPU") == 0)
return ARCH_X86_VENDOR_TRANSMETA;
else if (strcmp (id, "NexGenDriven") == 0)
else if (strcmp (id.idaschar, "NexGenDriven") == 0)
return ARCH_X86_VENDOR_NEXGEN;
else if (strcmp (id, "RiseRiseRise") == 0)
else if (strcmp (id.idaschar, "RiseRiseRise") == 0)
return ARCH_X86_VENDOR_RISE;
else if (strcmp (id, "UMC UMC UMC ") == 0)
else if (strcmp (id.idaschar, "UMC UMC UMC ") == 0)
return ARCH_X86_VENDOR_UMC;
else if (strcmp (id, "SiS SiS SiS ") == 0)
else if (strcmp (id.idaschar, "SiS SiS SiS ") == 0)
return ARCH_X86_VENDOR_SIS;
#endif