+2016-02-22 Martin Liska <mliska@suse.cz>
+
+ * hsa-gen.c (gen_hsa_clrsb): In case of zero value,
+ return bitsize - 1 as the return value.
+
2016-02-22 Oleg Endo <olegendo@gcc.gnu.org>
PR target/69806
hsa_op_with_type *arg = hsa_reg_or_immed_for_gimple_op (rhs1, hbb);
BrigType16_t bittype = hsa_bittype_for_type (arg->m_type);
unsigned bitsize = tree_to_uhwi (TYPE_SIZE (TREE_TYPE (rhs1)));
- gcc_checking_assert (bitsize >= 32);
+
+ /* FIRSTBIT instruction is defined just for 32 and 64-bits wide integers. */
+ gcc_checking_assert (bitsize == 32 || bitsize == 64);
/* Set true to MOST_SIG if the most significant bit is set to one. */
hsa_op_immed *c = new hsa_op_immed (1ul << (bitsize - 1),
new hsa_op_immed (0, arg->m_type));
hbb->append_insn (cmp);
- /* Return the number of leading bits, or 31 if the input value is zero. */
+ /* Return the number of leading bits,
+ or (bitsize - 1) if the input value is zero. */
cmov = new hsa_insn_basic (4, BRIG_OPCODE_CMOV, BRIG_TYPE_B32, NULL, is_zero,
- new hsa_op_immed (31, BRIG_TYPE_U32),
+ new hsa_op_immed (bitsize - 1, BRIG_TYPE_U32),
leading_bits->get_in_type (BRIG_TYPE_B32, hbb));
hbb->append_insn (cmov);
cmov->set_output_in_type (dest, 0, hbb);