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rs6000.c (rs6000_emit_move): Make sure that using FP registers for DImode mem-mem moves is acceptable.

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* config/rs6000/rs6000.c (rs6000_emit_move): Make sure that
using FP registers for DImode mem-mem moves is acceptable.

From-SVN: r46720
This commit is contained in:
DJ Delorie 2001-11-02 16:53:25 -05:00 • committed by DJ Delorie
parent 720ea9b169
commit c9e8cb32e3
2 changed files with 24 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-11-02 DJ Delorie <dj@redhat.com>
* config/rs6000/rs6000.c (rs6000_emit_move): Make sure that
using FP registers for DImode mem-mem moves is acceptable.
2001-11-02 Aldy Hernandez <aldyh@redhat.com>
* builtins.c (apply_args_size): Handle vector arguments.

19
gcc/config/rs6000/rs6000.c
View file

@ -1805,6 +1805,25 @@ rs6000_emit_move (dest, source, mode)
|| (CONST_DOUBLE_HIGH (operands[1]) == -1
&& CONST_DOUBLE_LOW (operands[1]) < 0)))
abort ();
/* Check if GCC is setting up a block move that will end up using FP
registers as temporaries. We must make sure this is acceptable. */
if (GET_CODE (operands[0]) == MEM
&& GET_CODE (operands[1]) == MEM
&& mode == DImode
&& ! TARGET_POWERPC64
&& (SLOW_UNALIGNED_ACCESS(DImode, MEM_ALIGN(operands[0]))
|| SLOW_UNALIGNED_ACCESS(DImode, MEM_ALIGN(operands[1]))))
{
rtx reg1, reg2;
reg1 = gen_reg_rtx(SImode);
reg2 = gen_reg_rtx(SImode);
rs6000_emit_move (reg1, simplify_subreg (SImode, operands[1], DImode, 0), SImode);
rs6000_emit_move (reg2, simplify_subreg (SImode, operands[1], DImode, 4), SImode);
rs6000_emit_move (simplify_subreg (SImode, operands[0], DImode, 0), reg1, SImode);
rs6000_emit_move (simplify_subreg (SImode, operands[0], DImode, 4), reg2, SImode);
return;
}
if (! no_new_pseudos && GET_CODE (operands[0]) != REG)
operands[1] = force_reg (mode, operands[1]);