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comparison doc/disas_examples/sparc64.sparc64.disas @ 497:cb19b2fe2422
- more disas examples to check behaviour of passing C++ non-trivial aggregates by value; they all behave the same, calling the copy ctor first, passing a pointer then
| author | Tassilo Philipp |
|---|---|
| date | Wed, 23 Mar 2022 15:24:31 +0100 |
| parents | c73c59c8b553 |
| children | fc614cb865c6 |
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| 496:da5232da6270 | 497:cb19b2fe2422 |
|---|---|
| 1607 1f4: 81 cf e0 08 rett %i7 + 8 | 1607 1f4: 81 cf e0 08 rett %i7 + 8 |
| 1608 1f8: 01 00 00 00 nop | 1608 1f8: 01 00 00 00 nop |
| 1609 | 1609 |
| 1610 | 1610 |
| 1611 | 1611 |
| 1612 ; ---------- C++ trivial and non-trivial aggrs passed to C funcs ----------> | |
| 1613 ; | |
| 1614 ; struct Trivial { int a; }; | |
| 1615 ; struct NonTrivial { int a; NonTrivial() : a(0) {} NonTrivial(const NonTrivial& rhs) : a(rhs.a) { } }; | |
| 1616 ; | |
| 1617 ; extern "C" { | |
| 1618 ; | |
| 1619 ; void f1(struct Trivial s) { } | |
| 1620 ; void f2(struct NonTrivial s) { } | |
| 1621 ; | |
| 1622 ; void f() | |
| 1623 ; { | |
| 1624 ; struct Trivial t; | |
| 1625 ; struct NonTrivial n; | |
| 1626 ; int a=1; | |
| 1627 ; a += 123; | |
| 1628 ; f1(t); | |
| 1629 ; a -= 123; | |
| 1630 ; f2(n); | |
| 1631 ; a -= 12; | |
| 1632 ; } | |
| 1633 ; } | |
| 1634 | |
| 1635 | |
| 1636 | |
| 1637 ; output from openbsd-6.0-sparc64 w/ gcc 4.2.1 | |
| 1638 | |
| 1639 0000000000000d20 <f1>: | |
| 1640 d20: 9d e3 bf 30 save %sp, -208, %sp | |
| 1641 d24: 82 10 00 18 mov %i0, %g1 | |
| 1642 d28: 83 38 70 20 srax %g1, 0x20, %g1 | |
| 1643 d2c: c4 07 a8 7f ld [ %fp + 0x87f ], %g2 | |
| 1644 d30: 84 08 a0 00 and %g2, 0, %g2 | |
| 1645 d34: 82 10 80 01 or %g2, %g1, %g1 | |
| 1646 d38: c2 27 a8 7f st %g1, [ %fp + 0x87f ] | |
| 1647 d3c: 81 cf e0 08 rett %i7 + 8 | |
| 1648 d40: 01 00 00 00 nop | |
| 1649 | |
| 1650 0000000000000d44 <f2>: | |
| 1651 d44: 9d e3 bf 30 save %sp, -208, %sp | |
| 1652 d48: f0 77 a8 7f stx %i0, [ %fp + 0x87f ] | |
| 1653 d4c: 81 cf e0 08 rett %i7 + 8 | |
| 1654 d50: 01 00 00 00 nop | |
| 1655 d54: ae 03 c0 17 add %o7, %l7, %l7 | |
| 1656 d58: 81 c3 e0 08 retl | |
| 1657 d5c: 01 00 00 00 nop | |
| 1658 | |
| 1659 0000000000000d60 <f>: | |
| 1660 d60: 9d e3 bf 20 save %sp, -224, %sp ; | |
| 1661 d64: 2f 00 0c 00 sethi %hi(0x300000), %l7 ; | |
| 1662 d68: ae 05 e2 ac add %l7, 0x2ac, %l7 ; | |
| 1663 d6c: 7f ff ff fa call d54 <f2+0x10> ; | |
| 1664 d70: 01 00 00 00 nop ; | |
| 1665 d74: 03 00 00 00 sethi %hi(0), %g1 ; | |
| 1666 d78: 82 10 60 48 or %g1, 0x48, %g1 ; | |
| 1667 d7c: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 ; | |
| 1668 d80: c4 58 40 00 ldx [ %g1 ], %g2 ; | |
| 1669 d84: c4 77 a7 e7 stx %g2, [ %fp + 0x7e7 ] ; | |
| 1670 d88: 84 10 20 00 clr %g2 ; | |
| 1671 d8c: 82 07 a7 df add %fp, 0x7df, %g1 ; | |
| 1672 d90: 90 10 00 01 mov %g1, %o0 ; | |
| 1673 d94: 40 14 01 13 call 5011e0 <_ZN10NonTrivialC1Ev@plt> ; NonTrivial::NonTrivial() / ctor | |
| 1674 d98: 01 00 00 00 nop ; | |
| 1675 d9c: 82 10 20 01 mov 1, %g1 ; | |
| 1676 da0: c2 27 a7 db st %g1, [ %fp + 0x7db ] ; | |
| 1677 da4: c2 07 a7 db ld [ %fp + 0x7db ], %g1 ; | |
| 1678 da8: 82 00 60 7b add %g1, 0x7b, %g1 ; | |
| 1679 dac: c2 27 a7 db st %g1, [ %fp + 0x7db ] ; | |
| 1680 db0: c2 07 a7 e3 ld [ %fp + 0x7e3 ], %g1 ; | |
| 1681 db4: 83 30 60 00 srl %g1, 0, %g1 ; | |
| 1682 db8: 83 28 70 20 sllx %g1, 0x20, %g1 ; | |
| 1683 dbc: 90 10 00 01 mov %g1, %o0 ; | |
| 1684 dc0: 40 14 01 30 call 501280 <f1@plt> ; call f1(struct Trivial) | |
| 1685 dc4: 01 00 00 00 nop ; | |
| 1686 dc8: c2 07 a7 db ld [ %fp + 0x7db ], %g1 ; | |
| 1687 dcc: 82 00 7f 85 add %g1, -123, %g1 ; | |
| 1688 dd0: c2 27 a7 db st %g1, [ %fp + 0x7db ] ; | |
| 1689 dd4: 82 07 a7 d7 add %fp, 0x7d7, %g1 ; | |
| 1690 dd8: 84 07 a7 df add %fp, 0x7df, %g2 ; | |
| 1691 ddc: 90 10 00 01 mov %g1, %o0 ; | ptr to dest of copy of n | |
| 1692 de0: 92 10 00 02 mov %g2, %o1 ; | copy n ptr to n | |
| 1693 de4: 40 14 00 e7 call 501180 <_ZN10NonTrivialC1ERKS_@plt> ; | NonTrivial::NonTrivial(const NonTrivial&) / copy ctor | |
| 1694 de8: 01 00 00 00 nop ; | |
| 1695 dec: 82 07 a7 d7 add %fp, 0x7d7, %g1 ; | | |
| 1696 df0: 90 10 00 01 mov %g1, %o0 ; | f2 arg 0 (ptr to copy of struct NonTrivial), via ptr as non-trivial | |
| 1697 df4: 40 14 01 03 call 501200 <f2@plt> ; call f2(struct NonTrivial) | |
| 1698 df8: 01 00 00 00 nop ; | |
| 1699 dfc: c2 07 a7 db ld [ %fp + 0x7db ], %g1 ; | |
| 1700 e00: 82 00 7f f4 add %g1, -12, %g1 ; | |
| 1701 e04: c2 27 a7 db st %g1, [ %fp + 0x7db ] ; | |
| 1702 e08: 03 00 00 00 sethi %hi(0), %g1 ; | |
| 1703 e0c: 82 10 60 48 or %g1, 0x48, %g1 ; | |
| 1704 e10: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 ; | |
| 1705 e14: c6 5f a7 e7 ldx [ %fp + 0x7e7 ], %g3 ; | |
| 1706 e18: c4 58 40 00 ldx [ %g1 ], %g2 ; | |
| 1707 e1c: 86 18 c0 02 xor %g3, %g2, %g3 ; | |
| 1708 e20: 84 10 20 00 clr %g2 ; | |
| 1709 e24: 82 10 00 03 mov %g3, %g1 ; | |
| 1710 e28: 02 c8 40 08 brz %g1, e48 <f+0xe8> ; | |
| 1711 e2c: 01 00 00 00 nop ; | |
| 1712 e30: 03 00 00 00 sethi %hi(0), %g1 ; | |
| 1713 e34: 82 10 60 40 or %g1, 0x40, %g1 ; | |
| 1714 e38: c2 5d c0 01 ldx [ %l7 + %g1 ], %g1 ; | |
| 1715 e3c: 90 10 00 01 mov %g1, %o0 ; | |
| 1716 e40: 40 14 00 d8 call 5011a0 <__stack_smash_handler@plt> ; | |
| 1717 e44: 01 00 00 00 nop ; | |
| 1718 e48: 81 cf e0 08 rett %i7 + 8 ; | |
| 1719 e4c: 01 00 00 00 nop ; | |
| 1720 | |
| 1721 ; ... snip, removed code of ctor and copy ctor ... | |
| 1722 | |
| 1723 | |
| 1724 | |
| 1612 ; vim: ft=asm | 1725 ; vim: ft=asm |
| 1613 | 1726 |