OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

(expand_mult_highpart): Build constant forms of CNST1 in MODE or

Browse Source 
WIDE_MODE, as appropriate.

From-SVN: r7676
This commit is contained in:
Richard Kenner 1994-07-07 22:19:57 -04:00
parent 41b19f3e70
commit 5b0ce75844
1 changed files with 17 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
gcc/expmed.c
View File

@ -2434,9 +2434,19 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp)
optab moptab;
rtx tem;
int size = GET_MODE_BITSIZE (mode);
rtx op1;
rtx op1, wide_op1;
op1 = immed_double_const (cnst1,
/* We can't support modes wider than HOST_BITS_PER_INT. */
if (size > HOST_BITS_PER_WIDE_INT)
abort ();
op1 = GEN_INT (cnst1);
if (GET_MODE_BITSIZE (wider_mode) <= HOST_BITS_PER_INT)
wide_op1 = op1;
else
wide_op1
= immed_double_const (cnst1,
(unsignedp
? (HOST_WIDE_INT) 0
: -(cnst1 >> (HOST_BITS_PER_WIDE_INT - 1))),
@ -2450,7 +2460,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp)
multiply. Maybe change expand_binop to handle widening multiply? */
op0 = convert_to_mode (wider_mode, op0, unsignedp);
tem = expand_mult (wider_mode, op0, op1, NULL_RTX, unsignedp);
tem = expand_mult (wider_mode, op0, wide_op1, NULL_RTX, unsignedp);
tem = expand_shift (RSHIFT_EXPR, wider_mode, tem,
build_int_2 (size, 0), NULL_RTX, 1);
return gen_lowpart (mode, tem);
@ -2475,7 +2485,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp)
if (target)
/* We used the wrong signedness. Adjust the result. */
return expand_mult_highpart_adjust (mode, target, op0,
GEN_INT (cnst1), target, unsignedp);
op1, target, unsignedp);
/* Thirdly, we try to use a widening multiplication, or a wider mode
multiplication. */
@ -2491,7 +2501,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp)
moptab = unsignedp ? smul_widen_optab : umul_widen_optab;
if (moptab->handlers[(int) wider_mode].insn_code != CODE_FOR_nothing)
{
tem = expand_binop (wider_mode, moptab, op0, op1,
tem = expand_binop (wider_mode, moptab, op0, wide_op1,
NULL_RTX, ! unsignedp, OPTAB_WIDEN);
if (tem != 0)
{
@ -2500,8 +2510,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp)
build_int_2 (size, 0), NULL_RTX, 1);
tem = gen_lowpart (mode, tem);
/* We used the wrong signedness. Adjust the result. */
return expand_mult_highpart_adjust (mode, tem, op0,
GEN_INT (cnst1),
return expand_mult_highpart_adjust (mode, tem, op0, op1,
target, unsignedp);
}
}
@ -2512,7 +2521,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp)
}
/* Pass NULL_RTX as target since TARGET has wrong mode. */
tem = expand_binop (wider_mode, moptab, op0, op1,
tem = expand_binop (wider_mode, moptab, op0, wide_op1,
NULL_RTX, unsignedp, OPTAB_WIDEN);
if (tem == 0)
return 0;