Unsigned -> float conversion for fp-bit.c

From-SVN: r36274

gcc/ChangeLog

+2000-09-08  Stephane Carrez  <Stephane.Carrez@worldnet.fr>
+
+	* Makefile.in (DPBIT_FUNCS): Add _usi_to_df.
+	(FPBIT_FUNCS): Add _usi_to_sf.
+	* config/fp-bit.c (usi_to_float): New function.
+	* config/fp-bit.h (L_usi_to_sf, L_usi_to_df): Define.
+	(usi_to_float): Add appropriate #define.
+
 2000-09-08  Bernd Schmidt  <bernds@redhat.co.uk>
 
 	* i386-protos.h (sse_comparison_operator, mmx_reg_operand): Declare

gcc/Makefile.in

@@ -753,12 +753,12 @@ LIB2FUNCS_EH = _eh
 FPBIT_FUNCS = _pack_sf _unpack_sf _addsub_sf _mul_sf _div_sf \
     _fpcmp_parts_sf _compare_sf _eq_sf _ne_sf _gt_sf _ge_sf \
     _lt_sf _le_sf _unord_sf _si_to_sf _sf_to_si _negate_sf _make_sf \
-    _sf_to_df _thenan_sf _sf_to_usi
+    _sf_to_df _thenan_sf _sf_to_usi _usi_to_sf
 
 DPBIT_FUNCS = _pack_df _unpack_df _addsub_df _mul_df _div_df \
     _fpcmp_parts_df _compare_df _eq_df _ne_df _gt_df _ge_df \
     _lt_df _le_df _unord_df _si_to_df _df_to_si _negate_df _make_df \
-    _df_to_sf _thenan_df _df_to_usi
+    _df_to_sf _thenan_df _df_to_usi _usi_to_df
 
 # The files that "belong" in CONFIG_H are deliberately omitted
 # because having them there would not be useful in actual practice.

gcc/config/fp-bit.c

@@ -1169,6 +1169,38 @@ si_to_float (SItype arg_a)
 }
 #endif /* L_si_to_sf || L_si_to_df */
 
+#if defined(L_usi_to_sf) || defined(L_usi_to_df)
+FLO_type
+usi_to_float (USItype arg_a)
+{
+  fp_number_type in;
+
+  in.sign = 0;
+  if (!arg_a)
+    {
+      in.class = CLASS_ZERO;
+    }
+  else
+    {
+      in.class = CLASS_NUMBER;
+      in.normal_exp = FRACBITS + NGARDS;
+      in.fraction.ll = arg_a;
+
+      while (in.fraction.ll > (1LL << (FRACBITS + NGARDS)))
+        {
+          in.fraction.ll >>= 1;
+          in.normal_exp += 1;
+        }
+      while (in.fraction.ll < (1LL << (FRACBITS + NGARDS)))
+	{
+	  in.fraction.ll <<= 1;
+	  in.normal_exp -= 1;
+	}
+    }
+  return pack_d (&in);
+}
+#endif
+
 #if defined(L_sf_to_si) || defined(L_df_to_si)
 SItype
 float_to_si (FLO_type arg_a)

gcc/config/fp-bit.h

@@ -66,6 +66,8 @@ Boston, MA 02111-1307, USA.  */
 #define L_le_df
 #define L_unord_sf
 #define L_unord_df
+#define L_usi_to_sf
+#define L_usi_to_df
 #define L_si_to_sf
 #define L_si_to_df
 #define L_sf_to_si
@@ -193,6 +195,7 @@ typedef unsigned int UDItype __attribute__ ((mode (DI)));
 #		define _lt_f2 		__ltsf2
 #		define _le_f2 		__lesf2
 #		define _unord_f2	__unordsf2
+#		define usi_to_float 	__floatunsisf
 #		define si_to_float 	__floatsisf
 #		define float_to_si 	__fixsfsi
 #		define float_to_usi 	__fixunssfsi
@@ -211,6 +214,7 @@ typedef unsigned int UDItype __attribute__ ((mode (DI)));
 #		define _lt_f2 		__ltdf2
 #		define _le_f2 		__ledf2
 #		define _unord_f2	__unorddf2
+#		define usi_to_float 	__floatunsidf
 #		define si_to_float 	__floatsidf
 #		define float_to_si 	__fixdfsi
 #		define float_to_usi 	__fixunsdfsi