nir: Add rounding modes enum

v2: Added comments describing each of the rounding modes. (Jason
    Ekstrand)

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 2abf2ddd84345ad5472e407127e621fd59af31a8..1e0dee9119264838af0fa31b56f53ea3a707f9df 100644 (file)
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -106,6 +106,16 @@ typedef enum {
    nir_var_all             = ~0,
 } nir_variable_mode;
 
+/**
+ * Rounding modes.
+ */
+typedef enum {
+   nir_rounding_mode_undef = 0,
+   nir_rounding_mode_rtne  = 1, /* round to nearest even */
+   nir_rounding_mode_ru    = 2, /* round up */
+   nir_rounding_mode_rd    = 3, /* round down */
+   nir_rounding_mode_rtz   = 4, /* round towards zero */
+} nir_rounding_mode;
 
 typedef union {
    float f32[4];