Commit 8e1796b9 authored by Anton Blanchard's avatar Anton Blanchard Committed by Erik de Castro Lopo

Add runtime detection of POWER8 and POWER9

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: default avatarAnton Blanchard <anton@ozlabs.org>
parent c0215fc1
......@@ -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;
......
......@@ -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);
......
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