cpuinfo: Added SDL_HasAVX512F().
This checks for the "foundation" AVX-512 instructions (that all AVX-512
compatible CPUs support).
--HG--
extra : rebase_source : 2857dd04072e2f897e18665d0a4fe2837c06ed9b
extra : histedit_source : 67d0b925bceb2ed2a8f37b5783f2b755e796031f
diff --git a/include/SDL_cpuinfo.h b/include/SDL_cpuinfo.h
index 270ee52..acdb1a8 100644
--- a/include/SDL_cpuinfo.h
+++ b/include/SDL_cpuinfo.h
@@ -160,6 +160,11 @@
extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX2(void);
/**
+ * This function returns true if the CPU has AVX-512F (foundation) features.
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_HasAVX512F(void);
+
+/**
* This function returns true if the CPU has NEON (ARM SIMD) features.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_HasNEON(void);
diff --git a/src/cpuinfo/SDL_cpuinfo.c b/src/cpuinfo/SDL_cpuinfo.c
index 4e0a7e3..1decb2d 100644
--- a/src/cpuinfo/SDL_cpuinfo.c
+++ b/src/cpuinfo/SDL_cpuinfo.c
@@ -89,6 +89,7 @@
#define CPU_HAS_AVX (1 << 9)
#define CPU_HAS_AVX2 (1 << 10)
#define CPU_HAS_NEON (1 << 11)
+#define CPU_HAS_AVX512F (1 << 12)
#if SDL_ALTIVEC_BLITTERS && HAVE_SETJMP && !__MACOSX__ && !__OpenBSD__
/* This is the brute force way of detecting instruction sets...
@@ -247,6 +248,7 @@
static int CPU_CPUIDFeatures[4];
static int CPU_CPUIDMaxFunction = 0;
static SDL_bool CPU_OSSavesYMM = SDL_FALSE;
+static SDL_bool CPU_OSSavesZMM = SDL_FALSE;
static void
CPU_calcCPUIDFeatures(void)
@@ -267,7 +269,7 @@
/* Check to make sure we can call xgetbv */
if (c & 0x08000000) {
- /* Call xgetbv to see if YMM register state is saved */
+ /* Call xgetbv to see if YMM (etc) register state is saved */
#if defined(__GNUC__) && (defined(i386) || defined(__x86_64__))
__asm__(".byte 0x0f, 0x01, 0xd0" : "=a" (a) : "c" (0) : "%edx");
#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64)) && (_MSC_FULL_VER >= 160040219) /* VS2010 SP1 */
@@ -281,6 +283,7 @@
}
#endif
CPU_OSSavesYMM = ((a & 6) == 6) ? SDL_TRUE : SDL_FALSE;
+ CPU_OSSavesZMM = (CPU_OSSavesYMM && ((a & 0xe0) == 0xe0)) ? SDL_TRUE : SDL_FALSE;
}
}
}
@@ -401,6 +404,18 @@
return 0;
}
+static int
+CPU_haveAVX512F(void)
+{
+ if (CPU_OSSavesZMM && (CPU_CPUIDMaxFunction >= 7)) {
+ int a, b, c, d;
+ (void) a; (void) b; (void) c; (void) d; /* compiler warnings... */
+ cpuid(7, a, b, c, d);
+ return (b & 0x00010000);
+ }
+ return 0;
+}
+
static int SDL_CPUCount = 0;
int
@@ -624,6 +639,10 @@
SDL_CPUFeatures |= CPU_HAS_AVX2;
SDL_SIMDAlignment = SDL_max(SDL_SIMDAlignment, 32);
}
+ if (CPU_haveAVX512F()) {
+ SDL_CPUFeatures |= CPU_HAS_AVX512F;
+ SDL_SIMDAlignment = SDL_max(SDL_SIMDAlignment, 64);
+ }
if (CPU_haveNEON()) {
SDL_CPUFeatures |= CPU_HAS_NEON;
SDL_SIMDAlignment = SDL_max(SDL_SIMDAlignment, 16);
@@ -700,6 +719,12 @@
}
SDL_bool
+SDL_HasAVX512F(void)
+{
+ return CPU_FEATURE_AVAILABLE(CPU_HAS_AVX512F);
+}
+
+SDL_bool
SDL_HasNEON(void)
{
return CPU_FEATURE_AVAILABLE(CPU_HAS_NEON);
@@ -819,6 +844,7 @@
printf("SSE4.2: %d\n", SDL_HasSSE42());
printf("AVX: %d\n", SDL_HasAVX());
printf("AVX2: %d\n", SDL_HasAVX2());
+ printf("AVX-512F: %d\n", SDL_HasAVX512F());
printf("NEON: %d\n", SDL_HasNEON());
printf("RAM: %d MB\n", SDL_GetSystemRAM());
return 0;
diff --git a/src/dynapi/SDL_dynapi_overrides.h b/src/dynapi/SDL_dynapi_overrides.h
index b454e5a..62de268 100644
--- a/src/dynapi/SDL_dynapi_overrides.h
+++ b/src/dynapi/SDL_dynapi_overrides.h
@@ -671,3 +671,4 @@
#define SDL_log10f SDL_log10f_REAL
#define SDL_GameControllerMappingForDeviceIndex SDL_GameControllerMappingForDeviceIndex_REAL
#define SDL_LinuxSetThreadPriority SDL_LinuxSetThreadPriority_REAL
+#define SDL_HasAVX512F SDL_HasAVX512F_REAL
diff --git a/src/dynapi/SDL_dynapi_procs.h b/src/dynapi/SDL_dynapi_procs.h
index e4e6907..895b768 100644
--- a/src/dynapi/SDL_dynapi_procs.h
+++ b/src/dynapi/SDL_dynapi_procs.h
@@ -711,3 +711,4 @@
#ifdef __LINUX__
SDL_DYNAPI_PROC(int,SDL_LinuxSetThreadPriority,(Sint64 a, int b),(a,b),return)
#endif
+SDL_DYNAPI_PROC(SDL_bool,SDL_HasAVX512F,(void),(),return)
diff --git a/test/testplatform.c b/test/testplatform.c
index 84efab3..1c1d2dc 100644
--- a/test/testplatform.c
+++ b/test/testplatform.c
@@ -380,6 +380,7 @@
SDL_Log("SSE4.2 %s\n", SDL_HasSSE42()? "detected" : "not detected");
SDL_Log("AVX %s\n", SDL_HasAVX()? "detected" : "not detected");
SDL_Log("AVX2 %s\n", SDL_HasAVX2()? "detected" : "not detected");
+ SDL_Log("AVX-512F %s\n", SDL_HasAVX512F()? "detected" : "not detected");
SDL_Log("NEON %s\n", SDL_HasNEON()? "detected" : "not detected");
SDL_Log("System RAM %d MB\n", SDL_GetSystemRAM());
}
