1 files changed, 25 insertions, 0 deletions
diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h
index 2e43d1dd9e..53d5eb8521 100644
--- a/include/fpu/softfloat-types.h
+++ b/include/fpu/softfloat-types.h
@@ -165,6 +165,13 @@ enum {
     float_flag_invalid_sqrt    = 0x0800,  /* sqrt(-x) */
     float_flag_invalid_cvti    = 0x1000,  /* non-nan to integer */
     float_flag_invalid_snan    = 0x2000,  /* any operand was snan */
+    /*
+     * An input was denormal and we used it (without flushing it to zero).
+     * Not set if we do not actually use the denormal input (e.g.
+     * because some other input was a NaN, or because the operation
+     * wasn't actually carried out (divide-by-zero; invalid))
+     */
+    float_flag_input_denormal_used = 0x4000,
 };
 
 /*
@@ -298,6 +305,22 @@ typedef enum __attribute__((__packed__)) {
 } FloatInfZeroNaNRule;
 
 /*
+ * When flush_to_zero is set, should we detect denormal results to
+ * be flushed before or after rounding? For most architectures this
+ * should be set to match the tininess_before_rounding setting,
+ * but a few architectures, e.g. MIPS MSA, detect FTZ before
+ * rounding but tininess after rounding.
+ *
+ * This enum is arranged so that the default if the target doesn't
+ * configure it matches the default for tininess_before_rounding
+ * (i.e. "after rounding").
+ */
+typedef enum __attribute__((__packed__)) {
+    float_ftz_after_rounding = 0,
+    float_ftz_before_rounding = 1,
+} FloatFTZDetection;
+
+/*
  * Floating Point Status. Individual architectures may maintain
  * several versions of float_status for different functions. The
  * correct status for the operation is then passed by reference to
@@ -314,6 +337,8 @@ typedef struct float_status {
     bool tininess_before_rounding;
     /* should denormalised results go to zero and set output_denormal_flushed? */
     bool flush_to_zero;
+    /* do we detect and flush denormal results before or after rounding? */
+    FloatFTZDetection ftz_detection;
     /* should denormalised inputs go to zero and set input_denormal_flushed? */
     bool flush_inputs_to_zero;
     bool default_nan_mode;