mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-29 23:52:22 +00:00
09a10f80e1
They take advantage of gcc's vector_size attribute and so only cross, dot, qmul, qvmul and qrot (create rotation quaternion from two vectors) are needed at this stage as basic (per-component) math is supported natively by gcc. The provided functions work on horizontal (array-of-structs) data, ie a vec4d_t or vec4f_t represents a single vector, or traditional vector layout. Vertical layout (struct-of-arrays) does not need any special functions as the regular math can be used to operate on four vectors at a time. Functions are provided for loading a vec4 from a vec3 (4th element set to 0) and storing a vec4 into a vec3 (discarding the 4th element). With this, QF will require AVX2 support (needed for vec4d_t). Without support for doubles, SSE is possible, but may not be worthwhile for horizontal data. Fused-multiply-add is NOT used because it alters the results between unoptimized and optimized code, resulting in -mfma really meaning -mfast-math-anyway. I really do not want to have to debug issues that occur only in optimized code. |
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| .. | ||
| ac_config_files.m4 | ||
| asm.m4 | ||
| build_control.m4 | ||
| cdrom.m4 | ||
| compiling.m4 | ||
| compression.m4 | ||
| cross_compile.m4 | ||
| curses.m4 | ||
| fbdev.m4 | ||
| git-version-gen | ||
| header_files.m4 | ||
| joystick.m4 | ||
| library_functions.m4 | ||
| mgl.m4 | ||
| networking.m4 | ||
| paths.m4 | ||
| programs.m4 | ||
| pthread.m4 | ||
| qfcc.m4 | ||
| result.m4 | ||
| rpm.m4 | ||
| sdl.m4 | ||
| sound.m4 | ||
| svga.m4 | ||
| system_services.m4 | ||
| typedefs_structs_compiler.m4 | ||
| versions.m4 | ||
| vulkan.m4 | ||
| windows.m4 | ||
| x11.m4 | ||