CPU-based fixed-point math

jpacold · Jun 24, 2024 · 82c115e · 82c115e
1 parent cb75956
commit 82c115e
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/.gitignore b/.gitignore
@@ -12,7 +12,6 @@ tags
 CMakeCache.txt
 CMakeFiles/
 Makefile
-*.cmake
 include/OpenCL/
 _build/
 _cuda_build/

diff --git a/cmake/FpMath.cmake b/cmake/FpMath.cmake
@@ -0,0 +1,14 @@
+set(FPPOW "5" CACHE STRING "Log2 of float bits, for use in pairs as complex amplitudes (must be at least 2, equivalent to half precision)")
+option(ENABLE_FIXED_POINT "Use fixed-point math instead of floating-point" OFF)
+
+if (FPPOW LESS 4)
+    message(FATAL_ERROR "FPPOW must be at least 4, equivalent to \"half\" precision!")
+endif (FPPOW LESS 4)
+
+if (FPPOW GREATER 7)
+    message(FATAL_ERROR "FPPOW must be no greater than 7, equivalent to 128-bit precision!")
+endif (FPPOW GREATER 7)
+
+if (FPPOW LESS 5)
+    set(ENABLE_COMPLEX_X2 OFF)
+endif (FPPOW LESS 5)