+2000-01-06 Richard Henderson <rth@cygnus.com>
+
+ * alpha.md (adddi_2+1): Limit offset such that it will be
+ loadable with a single ldah+lda pair.
+ (adddi_2+2): Explicitly fail split if we can't make it work.
+
2000-01-06 Mumit Khan <khan@xraylith.wisc.edu>
* protoize.c: Conditionally include unistd.h.
[(set (match_operand:DI 0 "register_operand" "=r")
(plus:DI (match_operand:DI 1 "reg_no_subreg_operand" "r")
(match_operand:DI 2 "const_int_operand" "n")))]
- "REG_OK_FP_BASE_P (operands[1])"
+ "REG_OK_FP_BASE_P (operands[1])
+ && INTVAL (operands[2]) >= 0
+ /* This is the largest constant an lda+ldah pair can add, minus
+ an upper bound on the displacement between SP and AP during
+ register elimination. See INITIAL_ELIMINATION_OFFSET. */
+ && INTVAL (operands[2])
+ < (0x7fff8000
+ - FIRST_PSEUDO_REGISTER * UNITS_PER_WORD
+ - ALPHA_ROUND(current_function_outgoing_args_size)
+ - (ALPHA_ROUND (get_frame_size ()
+ + max_reg_num () * UNITS_PER_WORD
+ + current_function_pretend_args_size)
+ - current_function_pretend_args_size))"
"#")
;; Don't do this if we are adjusting SP since we don't want to do it
HOST_WIDE_INT low = (val & 0xffff) - 2 * (val & 0x8000);
HOST_WIDE_INT rest = val - low;
- operands[3] = GEN_INT (rest);
operands[4] = GEN_INT (low);
+ if (CONST_OK_FOR_LETTER_P (rest, 'L'))
+ operands[3] = GEN_INT (rest);
+ else if (! no_new_pseudos)
+ {
+ operands[3] = gen_reg_rtx (DImode);
+ emit_move_insn (operands[3], operands[2]);
+ emit_insn (gen_adddi3 (operands[0], operands[1], operands[3]));
+ DONE;
+ }
+ else
+ FAIL;
}")
(define_insn ""