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Add runtime detection of POWER8 and POWER9

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Use getauxval() to determine if we are on POWER8 or POWER9 or newer.
POWER8 is represented by version 2.07 and POWER9 by version 3.00.

Signed-off-by: Anton Blanchard <anton@ozlabs.org>
This commit is contained in:
Anton Blanchard 2018-07-07 10:49:59 +10:00 committed by Erik de Castro Lopo
parent c0215fc149
commit 8e1796b91a
2 changed files with 37 additions and 0 deletions
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31
src/libFLAC/cpu.c
View File

@ -53,6 +53,9 @@
#define dfprintf(file, format, ...)
#endif
#if defined FLAC__CPU_PPC
#include <sys/auxv.h>
#endif
#if (defined FLAC__CPU_IA32 || defined FLAC__CPU_X86_64) && (defined FLAC__HAS_NASM || FLAC__HAS_X86INTRIN) && !defined FLAC__NO_ASM
@ -230,6 +233,29 @@ x86_cpu_info (FLAC__CPUInfo *info)
#endif
}
static void
ppc_cpu_info (FLAC__CPUInfo *info)
{
#if defined FLAC__CPU_PPC
#ifndef PPC_FEATURE2_ARCH_3_00
#define PPC_FEATURE2_ARCH_3_00 0x00800000
#endif
#ifndef PPC_FEATURE2_ARCH_2_07
#define PPC_FEATURE2_ARCH_2_07 0x80000000
#endif
if (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_3_00) {
info->ppc.arch_3_00 = true;
} else if (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_2_07) {
info->ppc.arch_2_07 = true;
}
#else
info->ppc.arch_2_07 = false;
info->ppc.arch_3_00 = false;
#endif
}
void FLAC__cpu_info (FLAC__CPUInfo *info)
{
memset(info, 0, sizeof(*info));
@ -238,6 +264,8 @@ void FLAC__cpu_info (FLAC__CPUInfo *info)
info->type = FLAC__CPUINFO_TYPE_IA32;
#elif defined FLAC__CPU_X86_64
info->type = FLAC__CPUINFO_TYPE_X86_64;
#elif defined FLAC__CPU_PPC
info->type = FLAC__CPUINFO_TYPE_PPC;
#else
info->type = FLAC__CPUINFO_TYPE_UNKNOWN;
#endif
@ -247,6 +275,9 @@ void FLAC__cpu_info (FLAC__CPUInfo *info)
case FLAC__CPUINFO_TYPE_X86_64:
x86_cpu_info (info);
break;
case FLAC__CPUINFO_TYPE_PPC:
ppc_cpu_info (info);
break;
default:
info->use_asm = false;
break;

6
src/libFLAC/include/private/cpu.h
View File

@ -153,6 +153,7 @@
typedef enum {
FLAC__CPUINFO_TYPE_IA32,
FLAC__CPUINFO_TYPE_X86_64,
FLAC__CPUINFO_TYPE_PPC,
FLAC__CPUINFO_TYPE_UNKNOWN
} FLAC__CPUInfo_Type;
@ -173,11 +174,16 @@ typedef struct {
FLAC__bool fma;
} FLAC__CPUInfo_x86;
typedef struct {
FLAC__bool arch_3_00;
FLAC__bool arch_2_07;
} FLAC__CPUInfo_ppc;
typedef struct {
FLAC__bool use_asm;
FLAC__CPUInfo_Type type;
FLAC__CPUInfo_x86 x86;
FLAC__CPUInfo_ppc ppc;
} FLAC__CPUInfo;
void FLAC__cpu_info(FLAC__CPUInfo *info);