Fix comments, simplify logic.

[pf3gnuchains/gcc-fork.git] / gcc / optabs.c

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 747166b..cf5873b 100644 (file)
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -1389,11 +1389,12 @@ static rtx
 avoid_expensive_constant (enum machine_mode mode, optab binoptab,
                          rtx x, bool unsignedp)
 {
+  bool speed = optimize_insn_for_speed_p ();
+
   if (mode != VOIDmode
       && optimize
       && CONSTANT_P (x)
-      && rtx_cost (x, binoptab->code, optimize_insn_for_speed_p ())
-                   > COSTS_N_INSNS (1))
+      && rtx_cost (x, binoptab->code, speed) > rtx_cost (x, SET, speed))
     {
       if (CONST_INT_P (x))
        {
@@ -2927,7 +2928,7 @@ expand_absneg_bit (enum rtx_code code, enum machine_mode mode,
   const struct real_format *fmt;
   int bitpos, word, nwords, i;
   enum machine_mode imode;
-  HOST_WIDE_INT hi, lo;
+  double_int mask;
   rtx temp, insns;
 
   /* The format has to have a simple sign bit.  */
@@ -2963,18 +2964,9 @@ expand_absneg_bit (enum rtx_code code, enum machine_mode mode,
       nwords = (GET_MODE_BITSIZE (mode) + BITS_PER_WORD - 1) / BITS_PER_WORD;
     }
 
-  if (bitpos < HOST_BITS_PER_WIDE_INT)
-    {
-      hi = 0;
-      lo = (HOST_WIDE_INT) 1 << bitpos;
-    }
-  else
-    {
-      hi = (HOST_WIDE_INT) 1 << (bitpos - HOST_BITS_PER_WIDE_INT);
-      lo = 0;
-    }
+  mask = double_int_setbit (double_int_zero, bitpos);
   if (code == ABS)
-    lo = ~lo, hi = ~hi;
+    mask = double_int_not (mask);
 
   if (target == 0 || target == op0)
     target = gen_reg_rtx (mode);
@@ -2992,7 +2984,7 @@ expand_absneg_bit (enum rtx_code code, enum machine_mode mode,
            {
              temp = expand_binop (imode, code == ABS ? and_optab : xor_optab,
                                   op0_piece,
-                                  immed_double_const (lo, hi, imode),
+                                  immed_double_int_const (mask, imode),
                                   targ_piece, 1, OPTAB_LIB_WIDEN);
              if (temp != targ_piece)
                emit_move_insn (targ_piece, temp);
@@ -3010,7 +3002,7 @@ expand_absneg_bit (enum rtx_code code, enum machine_mode mode,
     {
       temp = expand_binop (imode, code == ABS ? and_optab : xor_optab,
                           gen_lowpart (imode, op0),
-                          immed_double_const (lo, hi, imode),
+                          immed_double_int_const (mask, imode),
                           gen_lowpart (imode, target), 1, OPTAB_LIB_WIDEN);
       target = lowpart_subreg_maybe_copy (mode, temp, imode);
 
@@ -3561,7 +3553,7 @@ expand_copysign_absneg (enum machine_mode mode, rtx op0, rtx op1, rtx target,
     }
   else
     {
-      HOST_WIDE_INT hi, lo;
+      double_int mask;
 
       if (GET_MODE_SIZE (mode) <= UNITS_PER_WORD)
        {
@@ -3583,20 +3575,10 @@ expand_copysign_absneg (enum machine_mode mode, rtx op0, rtx op1, rtx target,
          op1 = operand_subword_force (op1, word, mode);
        }
 
-      if (bitpos < HOST_BITS_PER_WIDE_INT)
-       {
-         hi = 0;
-         lo = (HOST_WIDE_INT) 1 << bitpos;
-       }
-      else
-       {
-         hi = (HOST_WIDE_INT) 1 << (bitpos - HOST_BITS_PER_WIDE_INT);
-         lo = 0;
-       }
+      mask = double_int_setbit (double_int_zero, bitpos);
 
-      sign = gen_reg_rtx (imode);
       sign = expand_binop (imode, and_optab, op1,
-                          immed_double_const (lo, hi, imode),
+                          immed_double_int_const (mask, imode),
                           NULL_RTX, 1, OPTAB_LIB_WIDEN);
     }
 
@@ -3640,7 +3622,7 @@ expand_copysign_bit (enum machine_mode mode, rtx op0, rtx op1, rtx target,
                     int bitpos, bool op0_is_abs)
 {
   enum machine_mode imode;
-  HOST_WIDE_INT hi, lo;
+  double_int mask;
   int word, nwords, i;
   rtx temp, insns;
 
@@ -3664,16 +3646,7 @@ expand_copysign_bit (enum machine_mode mode, rtx op0, rtx op1, rtx target,
       nwords = (GET_MODE_BITSIZE (mode) + BITS_PER_WORD - 1) / BITS_PER_WORD;
     }
 
-  if (bitpos < HOST_BITS_PER_WIDE_INT)
-    {
-      hi = 0;
-      lo = (HOST_WIDE_INT) 1 << bitpos;
-    }
-  else
-    {
-      hi = (HOST_WIDE_INT) 1 << (bitpos - HOST_BITS_PER_WIDE_INT);
-      lo = 0;
-    }
+  mask = double_int_setbit (double_int_zero, bitpos);
 
   if (target == 0 || target == op0 || target == op1)
     target = gen_reg_rtx (mode);
@@ -3690,13 +3663,15 @@ expand_copysign_bit (enum machine_mode mode, rtx op0, rtx op1, rtx target,
          if (i == word)
            {
              if (!op0_is_abs)
-               op0_piece = expand_binop (imode, and_optab, op0_piece,
-                                         immed_double_const (~lo, ~hi, imode),
-                                         NULL_RTX, 1, OPTAB_LIB_WIDEN);
+               op0_piece
+                 = expand_binop (imode, and_optab, op0_piece,
+                                 immed_double_int_const (double_int_not (mask),
+                                                         imode),
+                                 NULL_RTX, 1, OPTAB_LIB_WIDEN);
 
              op1 = expand_binop (imode, and_optab,
                                  operand_subword_force (op1, i, mode),
-                                 immed_double_const (lo, hi, imode),
+                                 immed_double_int_const (mask, imode),
                                  NULL_RTX, 1, OPTAB_LIB_WIDEN);
 
              temp = expand_binop (imode, ior_optab, op0_piece, op1,
@@ -3716,13 +3691,14 @@ expand_copysign_bit (enum machine_mode mode, rtx op0, rtx op1, rtx target,
   else
     {
       op1 = expand_binop (imode, and_optab, gen_lowpart (imode, op1),
-                         immed_double_const (lo, hi, imode),
+                         immed_double_int_const (mask, imode),
                          NULL_RTX, 1, OPTAB_LIB_WIDEN);
 
       op0 = gen_lowpart (imode, op0);
       if (!op0_is_abs)
        op0 = expand_binop (imode, and_optab, op0,
-                           immed_double_const (~lo, ~hi, imode),
+                           immed_double_int_const (double_int_not (mask),
+                                                   imode),
                            NULL_RTX, 1, OPTAB_LIB_WIDEN);
 
       temp = expand_binop (imode, ior_optab, op0, op1,
@@ -6056,7 +6032,7 @@ static GTY ((param_is (union tree_node))) htab_t libfunc_decls;
 static hashval_t
 libfunc_decl_hash (const void *entry)
 {
-  return htab_hash_string (IDENTIFIER_POINTER (DECL_NAME ((const_tree) entry)));
+  return IDENTIFIER_HASH_VALUE (DECL_NAME ((const_tree) entry));
 }
 
 static int