Fix promotion of floats to doubles

Use the f variants of the math functions if the input parameter is a
float, saves converting from float to double and running the double
variant of the math function for gaining no precision at all

Reviewed-by: Matt Turner <[email protected]>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3969>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mesa/swrast/s_texfilter.c b/src/mesa/swrast/s_texfilter.c
index f73037791de..cb91b81260e 100644
--- a/src/mesa/swrast/s_texfilter.c
+++ b/src/mesa/swrast/s_texfilter.c
@@ -1628,7 +1628,7 @@ create_filter_table(void)
       for (i = 0; i < WEIGHT_LUT_SIZE; ++i) {
          GLfloat alpha = 2;
          GLfloat r2 = (GLfloat) i / (GLfloat) (WEIGHT_LUT_SIZE - 1);
-         GLfloat weight = (GLfloat) exp(-alpha * r2);
+         GLfloat weight = expf(-alpha * r2);
          weightLut[i] = weight;
       }
    }