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(expand_mult_highpart): Use wide_op1 for all multiplies. 

(expand_divmod): Undo Nov 12 change.  Instead, add special case
for division by MIN_INT in signed TRUNC_DIV_EXPR case.

From-SVN: r9857
This commit is contained in:
Richard Kenner 1995-05-31 20:57:17 -04:00
parent 4c64a85262
commit d8f1376cd9
1 changed files with 7 additions and 5 deletions
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12
gcc/expmed.c
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@ -2577,7 +2577,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp, max_cost)
{
mul_highpart_optab = unsignedp ? umul_highpart_optab : smul_highpart_optab;
target = expand_binop (mode, mul_highpart_optab,
op0, op1, target, unsignedp, OPTAB_DIRECT);
op0, wide_op1, target, unsignedp, OPTAB_DIRECT);
if (target)
return target;
}
@ -2588,7 +2588,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp, max_cost)
{
mul_highpart_optab = unsignedp ? smul_highpart_optab : umul_highpart_optab;
target = expand_binop (mode, mul_highpart_optab,
op0, op1, target, unsignedp, OPTAB_DIRECT);
op0, wide_op1, target, unsignedp, OPTAB_DIRECT);
if (target)
/* We used the wrong signedness. Adjust the result. */
return expand_mult_highpart_adjust (mode, target, op0,
@ -2827,9 +2827,7 @@ expand_divmod (rem_flag, code, mode, op0, op1, target, unsignedp)
case TRUNC_DIV_EXPR:
if (op1_is_constant && HOST_BITS_PER_WIDE_INT >= size)
{
if (unsignedp
|| (INTVAL (op1)
== (HOST_WIDE_INT) 1 << (GET_MODE_BITSIZE (compute_mode) - 1)))
if (unsignedp)
{
unsigned HOST_WIDE_INT mh, ml;
int pre_shift, post_shift;
@ -2958,6 +2956,10 @@ expand_divmod (rem_flag, code, mode, op0, op1, target, unsignedp)
else if (d == -1)
quotient = expand_unop (compute_mode, neg_optab, op0,
tquotient, 0);
else if (INTVAL (op1) == (HOST_WIDE_INT) 1 << (size - 1))
/* This case is not handled correctly below. */
quotient = emit_store_flag (tquotient, EQ, op0, op1,
compute_mode, 1, 1);
else if (EXACT_POWER_OF_2_OR_ZERO_P (d)
&& (rem_flag ? smod_pow2_cheap : sdiv_pow2_cheap))
;