Hello,
several builtin-bitops-1.c tests have been failing recently on SPU
since the new clrsb builtin is not supported.
This patch fixes this by:
- installing the libgcc __clrsbdi2 routine into optabs
(which doesn't happen automatically on SPU since word_mode is TImode)
- providing an in-line expander for SImode clrsb.
Tested on spu-elf, committed to mainline.
Bye,
Ulrich
ChangeLog:
* config/spu/spu.c (spu_init_libfuncs): Install __clrsbdi2.
* config/spu/spu.md ("clrsb<mode>2"): New expander.
Index: gcc/config/spu/spu.c
===================================================================
*** gcc/config/spu/spu.c (revision 176247)
--- gcc/config/spu/spu.c (working copy)
*************** spu_init_libfuncs (void)
*** 5630,5635 ****
--- 5630,5636 ----
set_optab_libfunc (ffs_optab, DImode, "__ffsdi2");
set_optab_libfunc (clz_optab, DImode, "__clzdi2");
set_optab_libfunc (ctz_optab, DImode, "__ctzdi2");
+ set_optab_libfunc (clrsb_optab, DImode, "__clrsbdi2");
set_optab_libfunc (popcount_optab, DImode, "__popcountdi2");
set_optab_libfunc (parity_optab, DImode, "__paritydi2");
Index: gcc/config/spu/spu.md
===================================================================
*** gcc/config/spu/spu.md (revision 176209)
--- gcc/config/spu/spu.md (working copy)
***************
*** 2232,2237 ****
--- 2232,2252 ----
operands[5] = spu_const(<MODE>mode, 31);
})
+ (define_expand "clrsb<mode>2"
+ [(set (match_dup 2)
+ (gt:VSI (match_operand:VSI 1 "spu_reg_operand" "") (match_dup 5)))
+ (set (match_dup 3) (not:VSI (xor:VSI (match_dup 1) (match_dup 2))))
+ (set (match_dup 4) (clz:VSI (match_dup 3)))
+ (set (match_operand:VSI 0 "spu_reg_operand")
+ (plus:VSI (match_dup 4) (match_dup 5)))]
+ ""
+ {
+ operands[2] = gen_reg_rtx (<MODE>mode);
+ operands[3] = gen_reg_rtx (<MODE>mode);
+ operands[4] = gen_reg_rtx (<MODE>mode);
+ operands[5] = spu_const(<MODE>mode, -1);
+ })
+
(define_expand "ffs<mode>2"
[(set (match_dup 2)
(neg:VSI (match_operand:VSI 1 "spu_reg_operand" "")))
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
ulrich.weig...@de.ibm.com
