[commit] Fix trapping arithmetic libcalls on SPU

[commit] Fix trapping arithmetic libcalls on SPU

[Ulrich Weigand]

Hello,

a couple of -ftrapv test cases were failing on SPU:

FAIL: gcc.dg/ftrapv-1.c (test for excess errors)
WARNING: gcc.dg/ftrapv-1.c compilation failed to produce executable
FAIL: gcc.dg/ftrapv-2.c (test for excess errors)
WARNING: gcc.dg/ftrapv-2.c compilation failed to produce executable
FAIL: gcc.dg/pr30286.c (test for excess errors)
WARNING: gcc.dg/pr30286.c compilation failed to produce executable
FAIL: gcc.dg/pr38364.c (test for excess errors)
WARNING: gcc.dg/pr38364.c compilation failed to produce executable

The reason is that by default, optabs does not install libcall
functions for integer modes smaller than word_mode -- which is
TImode on SPU.  Thus optabs would always expand all trapping
arithmetic operations to TImode, and then fail, because there
actually is no TImode libcall in the library (because libgcc
is built as if word_mode were SImode).

The fix is to install those functions manually in spu_init_libfuncs,
as is already done for a number of other libcalls.

Tested on spu-elf, fixes the above failures.
Committed to mainline.

Bye,
Ulrich


ChangeLog:

	* config/spu/spu.c (spu_init_libfuncs): Install SImode and
	DImode trapping arithmetic libfuncs.


Index: gcc/config/spu/spu.c
===================================================================
*** gcc/config/spu/spu.c	(revision 169851)
--- gcc/config/spu/spu.c	(working copy)
*************** spu_init_libfuncs (void)
*** 5641,5646 ****
--- 5641,5659 ----
    set_conv_libfunc (ufloat_optab, DFmode, SImode, "__float_unssidf");
    set_conv_libfunc (ufloat_optab, DFmode, DImode, "__float_unsdidf");
  
+   set_optab_libfunc (addv_optab, SImode, "__addvsi3");
+   set_optab_libfunc (subv_optab, SImode, "__subvsi3");
+   set_optab_libfunc (smulv_optab, SImode, "__mulvsi3");
+   set_optab_libfunc (sdivv_optab, SImode, "__divvsi3");
+   set_optab_libfunc (negv_optab, SImode, "__negvsi2");
+   set_optab_libfunc (absv_optab, SImode, "__absvsi2");
+   set_optab_libfunc (addv_optab, DImode, "__addvdi3");
+   set_optab_libfunc (subv_optab, DImode, "__subvdi3");
+   set_optab_libfunc (smulv_optab, DImode, "__mulvdi3");
+   set_optab_libfunc (sdivv_optab, DImode, "__divvdi3");
+   set_optab_libfunc (negv_optab, DImode, "__negvdi2");
+   set_optab_libfunc (absv_optab, DImode, "__absvdi2");
+ 
    set_optab_libfunc (smul_optab, TImode, "__multi3");
    set_optab_libfunc (sdiv_optab, TImode, "__divti3");
    set_optab_libfunc (smod_optab, TImode, "__modti3");
-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com