tests: math: interpolation: disable floating point contraction

This test cannot tolerate any loss of precision, including the one caused by the compiler contracting floating points operations together, like in fused multiply-add (FMA). Some toolchains enable FP contraction by default, so disable it for the specific test and let the user decide themselves whether precision or performance is needed for their specific application. Signed-off-by: Ilya Tagunov <[email protected]>
zephyrproject-rtos · Nov 20, 2024 · 1feb2b8 · 1feb2b8
1 parent 2f800ce
commit 1feb2b8
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/tests/lib/math/interpolation/src/main.c b/tests/lib/math/interpolation/src/main.c
@@ -6,6 +6,8 @@
 #include <math.h>
 
 #include <zephyr/ztest.h>
+
+#pragma STDC FP_CONTRACT OFF
 #include <zephyr/math/interpolation.h>
 
 ZTEST(interpolation, test_interpolation_oob)