Module cpuinfo

Available on crate feature dep_sdl3 only.

CPU feature detection for SDL.

These functions are largely concerned with reporting if the system has access to various SIMD instruction sets, but also has other important info to share, such as system RAM size and number of logical CPU cores.

CPU instruction set checks, like SDL_HasSSE() and SDL_HasNEON(), are available on all platforms, even if they don’t make sense (an ARM processor will never have SSE and an x86 processor will never have NEON, for example, but these functions still exist and will simply return false in these cases).

Constants

SDL_CACHELINE_SIZE

A guess for the cacheline size used for padding.

Functions

SDL_GetCPUCacheLineSize^⚠

Determine the L1 cache line size of the CPU.

SDL_GetNumLogicalCPUCores^⚠

Get the number of logical CPU cores available.

SDL_GetSIMDAlignment^⚠

Report the alignment this system needs for SIMD allocations.

SDL_GetSystemRAM^⚠

Get the amount of RAM configured in the system.

SDL_HasARMSIMD^⚠

Determine whether the CPU has ARM SIMD (ARMv6) features.

SDL_HasAVX^⚠

Determine whether the CPU has AVX features.

SDL_HasAVX2^⚠

Determine whether the CPU has AVX2 features.

SDL_HasAVX512F^⚠

Determine whether the CPU has AVX-512F (foundation) features.

SDL_HasAltiVec^⚠

Determine whether the CPU has AltiVec features.

SDL_HasLASX^⚠

Determine whether the CPU has LASX (LOONGARCH SIMD) features.

SDL_HasLSX^⚠

Determine whether the CPU has LSX (LOONGARCH SIMD) features.

SDL_HasMMX^⚠

Determine whether the CPU has MMX features.

SDL_HasNEON^⚠

Determine whether the CPU has NEON (ARM SIMD) features.

SDL_HasSSE^⚠

Determine whether the CPU has SSE features.

SDL_HasSSE2^⚠

Determine whether the CPU has SSE2 features.

SDL_HasSSE3^⚠

Determine whether the CPU has SSE3 features.

SDL_HasSSE41^⚠

Determine whether the CPU has SSE4.1 features.

SDL_HasSSE42^⚠

Determine whether the CPU has SSE4.2 features.