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builtins.c (expand_builtin_signbit): Use extract_bit_field instead of gen_highpart or gen_lowpart when... 

* builtins.c (expand_builtin_signbit): Use extract_bit_field instead
	of gen_highpart or gen_lowpart when the floating point format is
	wider than the result mode.

Co-Authored-By: Ulrich Weigand <uweigand@de.ibm.com>

From-SVN: r77439
This commit is contained in:
Roger Sayle 2004-02-07 03:00:16 +00:00 committed by Roger Sayle
parent b105316055
commit 254878eadd
2 changed files with 31 additions and 23 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2004-02-06 Roger Sayle <roger@eyesopen.com>
Ulrich Weigand <uweigand@de.ibm.com>
* builtins.c (expand_builtin_signbit): Use extract_bit_field instead
of gen_highpart or gen_lowpart when the floating point format is
wider than the result mode.
2004-02-06 Andrew Pinski <pinskia@physics.uc.edu>
* dwarf2out.c (loclabel_num): Move into #ifdef

47
gcc/builtins.c
View File

@ -4986,34 +4986,35 @@ expand_builtin_signbit (tree exp, rtx target)
temp = expand_expr (arg, NULL_RTX, VOIDmode, 0);
temp = gen_lowpart (imode, temp);
if (GET_MODE_BITSIZE (imode) < GET_MODE_BITSIZE (rmode))
temp = gen_lowpart (rmode, temp);
else if (GET_MODE_BITSIZE (imode) > GET_MODE_BITSIZE (rmode))
if (GET_MODE_BITSIZE (imode) > GET_MODE_BITSIZE (rmode))
{
if (bitpos > GET_MODE_BITSIZE (rmode))
{
temp = gen_highpart (rmode, temp);
bitpos %= GET_MODE_BITSIZE (rmode);
}
else
temp = gen_lowpart (rmode, temp);
}
if (bitpos < HOST_BITS_PER_WIDE_INT)
{
hi = 0;
lo = (HOST_WIDE_INT) 1 << bitpos;
if (BITS_BIG_ENDIAN)
bitpos = GET_MODE_BITSIZE (imode) - 1 - bitpos;
temp = copy_to_mode_reg (imode, temp);
temp = extract_bit_field (temp, 1, bitpos, 1,
NULL_RTX, rmode, rmode,
GET_MODE_SIZE (imode));
}
else
{
hi = (HOST_WIDE_INT) 1 << (bitpos - HOST_BITS_PER_WIDE_INT);
lo = 0;
}
if (GET_MODE_BITSIZE (imode) < GET_MODE_BITSIZE (rmode))
temp = gen_lowpart (rmode, temp);
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;
}
temp = force_reg (rmode, temp);
temp = expand_binop (rmode, and_optab, temp,
immed_double_const (lo, hi, rmode),
target, 1, OPTAB_LIB_WIDEN);
temp = force_reg (rmode, temp);
temp = expand_binop (rmode, and_optab, temp,
immed_double_const (lo, hi, rmode),
target, 1, OPTAB_LIB_WIDEN);
}
return temp;
}