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Add loongarch support

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LSX and LASX are enabled by default if compiler supports them.
This commit is contained in:
yuanhecai
2022-05-31 19:10:05 +08:00
committed by Sam Lantinga
parent 9703f23663
commit 17f63e53f8
5 changed files with 268 additions and 0 deletions
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45
src/cpuinfo/SDL_cpuinfo.c
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@@ -112,6 +112,12 @@
#define CPU_HAS_NEON (1 << 11)
#define CPU_HAS_AVX512F (1 << 12)
#define CPU_HAS_ARM_SIMD (1 << 13)
#define CPU_HAS_LSX (1 << 14)
#define CPU_HAS_LASX (1 << 15)
#define CPU_CFG2 0x2
#define CPU_CFG2_LSX (1 << 6)
#define CPU_CFG2_LASX (1 << 7)
#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__ && !__FreeBSD__
/* This is the brute force way of detecting instruction sets...
@@ -508,6 +514,23 @@ CPU_haveNEON(void)
#endif
}
static int
CPU_readCPUCFG(void)
{
uint32_t cfg2 = 0;
#if defined __loongarch__
__asm__ volatile(
"cpucfg %0, %1 \n\t"
: "+&r"(cfg2)
: "r"(CPU_CFG2)
);
#endif
return cfg2;
}
#define CPU_haveLSX() (CPU_readCPUCFG() & CPU_CFG2_LSX)
#define CPU_haveLASX() (CPU_readCPUCFG() & CPU_CFG2_LASX)
#if defined(__e2k__)
inline int
CPU_have3DNow(void)
@@ -885,6 +908,14 @@ SDL_GetCPUFeatures(void)
SDL_CPUFeatures |= CPU_HAS_NEON;
SDL_SIMDAlignment = SDL_max(SDL_SIMDAlignment, 16);
}
if (CPU_haveLSX()) {
SDL_CPUFeatures |= CPU_HAS_LSX;
SDL_SIMDAlignment = SDL_max(SDL_SIMDAlignment, 16);
}
if (CPU_haveLASX()) {
SDL_CPUFeatures |= CPU_HAS_LASX;
SDL_SIMDAlignment = SDL_max(SDL_SIMDAlignment, 32);
}
}
return SDL_CPUFeatures;
}
@@ -974,6 +1005,18 @@ SDL_HasNEON(void)
return CPU_FEATURE_AVAILABLE(CPU_HAS_NEON);
}
SDL_bool
SDL_HasLSX(void)
{
return CPU_FEATURE_AVAILABLE(CPU_HAS_LSX);
}
SDL_bool
SDL_HasLASX(void)
{
return CPU_FEATURE_AVAILABLE(CPU_HAS_LASX);
}
static int SDL_SystemRAM = 0;
int
@@ -1170,6 +1213,8 @@ main()
printf("AVX-512F: %d\n", SDL_HasAVX512F());
printf("ARM SIMD: %d\n", SDL_HasARMSIMD());
printf("NEON: %d\n", SDL_HasNEON());
printf("LSX: %d\n", SDL_HasLSX());
printf("LASX: %d\n", SDL_HasLASX());
printf("RAM: %d MB\n", SDL_GetSystemRAM());
return 0;
}