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comparison gcc/config/xtensa/xtensa.md @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents 04ced10e8804
children 1830386684a0
comparison
equal deleted inserted replaced
111:04ced10e8804 131:84e7813d76e9
1 ;; GCC machine description for Tensilica's Xtensa architecture. 1 ;; GCC machine description for Tensilica's Xtensa architecture.
2 ;; Copyright (C) 2001-2017 Free Software Foundation, Inc. 2 ;; Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 ;; Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica. 3 ;; Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica.
4 4
5 ;; This file is part of GCC. 5 ;; This file is part of GCC.
6 6
7 ;; GCC is free software; you can redistribute it and/or modify it 7 ;; GCC is free software; you can redistribute it and/or modify it
36 (UNSPEC_TLS_CALL 9) 36 (UNSPEC_TLS_CALL 9)
37 (UNSPEC_TP 10) 37 (UNSPEC_TP 10)
38 (UNSPEC_MEMW 11) 38 (UNSPEC_MEMW 11)
39 (UNSPEC_LSETUP_START 12) 39 (UNSPEC_LSETUP_START 12)
40 (UNSPEC_LSETUP_END 13) 40 (UNSPEC_LSETUP_END 13)
41 (UNSPEC_FRAME_BLOCKAGE 14)
41 42
42 (UNSPECV_SET_FP 1) 43 (UNSPECV_SET_FP 1)
43 (UNSPECV_ENTRY 2) 44 (UNSPECV_ENTRY 2)
44 (UNSPECV_S32RI 4) 45 (UNSPECV_S32RI 4)
45 (UNSPECV_S32C1I 5) 46 (UNSPECV_S32C1I 5)
1674 (set_attr "length" "2")]) 1675 (set_attr "length" "2")])
1675 1676
1676 1677
1677 ;; Miscellaneous instructions. 1678 ;; Miscellaneous instructions.
1678 1679
1680 ;; In windowed ABI stack pointer adjustment must happen before any access
1681 ;; to the space allocated on stack is allowed, otherwise register spill
1682 ;; area may be clobbered. That's what frame blockage is supposed to enforce.
1683
1684 (define_expand "allocate_stack"
1685 [(set (match_operand 0 "nonimmed_operand")
1686 (minus (reg A1_REG) (match_operand 1 "add_operand")))
1687 (set (reg A1_REG)
1688 (minus (reg A1_REG) (match_dup 1)))]
1689 "TARGET_WINDOWED_ABI"
1690 {
1691 if (CONST_INT_P (operands[1]))
1692 {
1693 rtx neg_op0 = GEN_INT (-INTVAL (operands[1]));
1694 emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, neg_op0));
1695 }
1696 else
1697 {
1698 emit_insn (gen_subsi3 (stack_pointer_rtx, stack_pointer_rtx,
1699 operands[1]));
1700 }
1701 emit_move_insn (operands[0], virtual_stack_dynamic_rtx);
1702 emit_insn (gen_frame_blockage ());
1703 DONE;
1704 })
1705
1679 (define_expand "prologue" 1706 (define_expand "prologue"
1680 [(const_int 0)] 1707 [(const_int 0)]
1681 "" 1708 ""
1682 { 1709 {
1683 xtensa_expand_prologue (); 1710 xtensa_expand_prologue ();
1764 [(unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)] 1791 [(unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)]
1765 "" 1792 ""
1766 "" 1793 ""
1767 [(set_attr "length" "0") 1794 [(set_attr "length" "0")
1768 (set_attr "type" "nop")]) 1795 (set_attr "type" "nop")])
1796
1797 ;; Do not schedule instructions accessing memory before this point.
1798
1799 (define_expand "frame_blockage"
1800 [(set (match_dup 0)
1801 (unspec:BLK [(match_dup 1)] UNSPEC_FRAME_BLOCKAGE))]
1802 ""
1803 {
1804 operands[0] = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (Pmode));
1805 MEM_VOLATILE_P (operands[0]) = 1;
1806 operands[1] = stack_pointer_rtx;
1807 })
1808
1809 (define_insn "*frame_blockage"
1810 [(set (match_operand:BLK 0 "" "")
1811 (unspec:BLK [(match_operand:SI 1 "" "")] UNSPEC_FRAME_BLOCKAGE))]
1812 ""
1813 ""
1814 [(set_attr "length" "0")])
1769 1815
1770 (define_insn "trap" 1816 (define_insn "trap"
1771 [(trap_if (const_int 1) (const_int 0))] 1817 [(trap_if (const_int 1) (const_int 0))]
1772 "" 1818 ""
1773 { 1819 {