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LoongArch64: Some further cleaning and tweaking of the run-time support #909

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Merged
kirithika7 merged 1 commit into from
Jul 1, 2026
+19 −2
Merged

LoongArch64: Some further cleaning and tweaking of the run-time support #909

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2 changes: 1 addition & 1 deletion source/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -138,7 +138,7 @@ elseif(LOONGARCH64MATCH GREATER "-1")
message(STATUS "Detected LOONGARCH64 target processor")

option(LOONGARCH64_RUNTIME_CPU_DETECT "Enable LOONGARCH64 run-time CPU feature detection" ON)
if(NOT CMAKE_SYSTEM_NAME MATCHES "Linux|FreeBSD|OpenBSD")
if(NOT CMAKE_SYSTEM_NAME MATCHES "Linux")
set(LOONGARCH64_RUNTIME_CPU_DETECT OFF CACHE BOOL "" FORCE)
message(STATUS "Run-time CPU feature detection unsupported on this platform")
endif()
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1 change: 1 addition & 0 deletions source/common/cpu.cpp
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Expand Up @@ -461,6 +461,7 @@ uint32_t cpu_detect(bool benableavx512)

uint32_t cpu_detect( bool benableavx512 )
{
(void)benableavx512;
uint32_t flags = 0;

#ifdef ENABLE_ASSEMBLY
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18 changes: 17 additions & 1 deletion source/common/loongarch64/cpu.h
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Expand Up @@ -28,12 +28,14 @@

#if LOONGARCH64_RUNTIME_CPU_DETECT

#if HAVE_GETAUXVAL

#include <sys/auxv.h>

#define LA_HWCAP_LSX ( 1U << 4 )
#define LA_HWCAP_LASX ( 1U << 5 )

static inline uint32_t loongarch64_cpu_detect()
static inline uint32_t loongarch64_get_cpu_flags()
{
uint32_t flags = 0;
#if HAVE_LSX || HAVE_LSX
Expand All @@ -52,6 +54,20 @@ static inline uint32_t loongarch64_cpu_detect()
return flags;
}

#else // HAVE_GETAUXVAL
#error \
"Run-time CPU feature detection selected, but no detection method" \
"available for your platform. Rerun cmake configure with" \
"-DLOONGARCH64_RUNTIME_CPU_DETECT=OFF."
#endif // HAVE_GETAUXVAL

static inline uint32_t loongarch64_cpu_detect()
{
uint32_t flags = loongarch64_get_cpu_flags();

return flags;
}

#else // if LOONGARCH64_RUNTIME_CPU_DETECT

static inline uint32_t loongarch64_cpu_detect()
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