Math functions helper for CONFIG_SOFTFLOAT=yes

The patch below adds isfinite() and isnormal() functions which can
work with float64 type, used when CONFIG_SOFTFLOAT=yes.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4048 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 21 insertions, 0 deletions

diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index 7136e51f7d..544d906664 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -492,6 +492,27 @@ static always_inline int isinfinity (float64 d)
         (u.ll & 0x000FFFFFFFFFFFFFULL) == 0;
 }
 
+#ifdef CONFIG_SOFTFLOAT
+static always_inline int isfinite (float64 d)
+{
+    CPU_DoubleU u;
+
+    u.d = d;
+
+    return (((u.ll >> 52) & 0x7FF) != 0x7FF);
+}
+
+static always_inline int isnormal (float64 d)
+{
+    CPU_DoubleU u;
+
+    u.d = d;
+
+    uint32_t exp = (u.ll >> 52) & 0x7FF;
+    return ((0 < exp) && (exp < 0x7FF));
+}
+#endif
+
 void do_compute_fprf (int set_fprf)
 {
     int isneg;