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-rw-r--r--fpu/softfloat-parts.c.inc4
1 files changed, 3 insertions, 1 deletions
diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc
index 37d046cfe9..ebde42992f 100644
--- a/fpu/softfloat-parts.c.inc
+++ b/fpu/softfloat-parts.c.inc
@@ -615,7 +615,9 @@ static FloatPartsN *partsN(muladd_scalbn)(FloatPartsN *a, FloatPartsN *b,
             goto return_normal;
         }
         if (c->cls == float_class_zero) {
-            if (a->sign != c->sign) {
+            if (flags & float_muladd_suppress_add_product_zero) {
+                a->sign = c->sign;
+            } else if (a->sign != c->sign) {
                 goto return_sub_zero;
             }
             goto return_zero;