/* src/vm/jit/sparc64/md-abi.c - functions for Sparc ABI Copyright (C) 1996-2005, 2006, 2008 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO This file is part of CACAO. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "config.h" #include "vm/types.h" #include "vm/jit/sparc64/md-abi.h" #include "vm/descriptor.hpp" #include "vm/global.h" #include "vm/jit/abi.h" #include "vm/jit/stack.h" /* temp */ #include "mm/memory.hpp" #include /* register descripton array **************************************************/ /* callee point-of-view, after SAVE has been called. */ s4 nregdescint[] = { /* zero itmp1/g1 itmp2/g2 itmp3/g3 temp/g4 temp/g5 sys/g6 sys/g7 */ REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, REG_RES, /* o0 o1 o2 o3 o4 pv/o5 sp/o6 ra/o7 */ REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_RES, REG_RES, REG_RES, /* l0 l1 l2 l3 l4 l5 l6 l7 */ REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, /* i0 i1 i2 i3 i4 pv/i5 fp/i6 ra/i7 */ REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_SAV, REG_RES, REG_RES, REG_RES, REG_END }; const char *abi_registers_integer_name[] = { "zero", "g1", "g2", "g3", "g4", "g5", "g6", "g7", "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7", "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", "i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7" }; const s4 abi_registers_integer_argument[] = { 8, /* o0 */ 9, /* o1 */ 10, /* o2 */ 11, /* o3 */ 12, /* o4 */ }; const s4 abi_registers_integer_saved[] = { 16, /* l0 */ 17, /* l1 */ 18, /* l2 */ 19, /* l3 */ 20, /* l4 */ 21, /* l5 */ 22, /* l6 */ 23, /* l7 */ 24, /* i0 */ 25, /* i1 */ 26, /* i2 */ 27, /* i3 */ 28, /* i4 */ }; s4 nregdescfloat[] = { REG_RET, REG_RES, REG_RES, REG_RES, REG_TMP, REG_TMP, REG_TMP, REG_TMP, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_ARG, REG_TMP, REG_TMP, REG_TMP, REG_END }; const s4 abi_registers_float_argument[] = { 8, /* f16 */ 9, /* f18 */ 10, /* f20 */ 11, /* f22 */ 12, /* f24 */ }; const s4 abi_registers_float_temporary[] = { 4, /* f8 */ 5, /* f10 */ 6, /* f12 */ 7, /* f14 */ 13, /* f26 */ 14, /* f28 */ 15, /* f30 */ }; s4 nat_argintregs[] = { REG_OUT0, REG_OUT1, REG_OUT2, REG_OUT3, REG_OUT4, REG_OUT5 }; /* md_param_alloc ************************************************************** Allocate Arguments to Stackslots according the Calling Conventions --- in md->paramcount: Number of arguments for this method md->paramtypes[].type: Argument types --- out md->params[].inmemory: Argument spilled on stack md->params[].regoff: Stack offset or rd->arg[int|flt]regs index md->memuse: Stackslots needed for argument spilling md->argintreguse: max number of integer arguments used md->argfltreguse: max number of float arguments used *******************************************************************************/ void md_param_alloc(methoddesc *md) { paramdesc *pd; s4 i; s4 reguse; s4 stacksize; /* set default values */ reguse = 0; stacksize = 0; /* get params field of methoddesc */ pd = md->params; for (i = 0; i < md->paramcount; i++, pd++) { switch (md->paramtypes[i].type) { case TYPE_INT: case TYPE_ADR: case TYPE_LNG: if (i < INT_ARG_CNT) { pd->inmemory = false; pd->index = reguse; pd->regoff = abi_registers_integer_argument[reguse]; reguse++; md->argintreguse = reguse; } else { pd->inmemory = true; pd->index = stacksize; pd->regoff = stacksize * 8; stacksize++; } break; case TYPE_FLT: case TYPE_DBL: if (i < FLT_ARG_CNT) { pd->inmemory = false; pd->index = reguse; pd->regoff = abi_registers_float_argument[reguse]; reguse++; md->argfltreguse = reguse; } else { pd->inmemory = true; pd->index = stacksize; pd->regoff = stacksize * 8; stacksize++; } break; } assert(pd->regoff != 26); } /* Since O0 is used for passing return values, this */ /* argument register usage has to be regarded, too */ if (IS_INT_LNG_TYPE(md->returntype.type)) { if (reguse < 1) md->argintreguse = 1; } /* fill register and stack usage */ md->memuse = stacksize; } /* md_param_alloc_native ******************************************************* * * Pre-allocate arguments according to the native ABI. * * *******************************************************************************/ void md_param_alloc_native(methoddesc *md) { paramdesc *pd; s4 i; s4 reguse; s4 stacksize; s4 min_nat_regs; /* Note: regoff will be set relative to a stack base of $sp+16 */ /* set default values */ reguse = 0; stacksize = 6; /* abi params: allocated, but not used */ /* when we are above this, we have to increase the stacksize with every */ /* single argument to create the proper argument array */ min_nat_regs = MIN(INT_NATARG_CNT, FLT_NATARG_CNT); /* get params field of methoddesc */ pd = md->params; for (i = 0; i < md->paramcount; i++, pd++) { switch (md->paramtypes[i].type) { case TYPE_INT: case TYPE_ADR: case TYPE_LNG: if (i < INT_NATARG_CNT) { pd->inmemory = false; pd->regoff = nat_argintregs[reguse]; reguse++; md->argintreguse = reguse; } else { pd->inmemory = true; pd->regoff = reguse * 8; reguse++; } break; case TYPE_FLT: case TYPE_DBL: if (i < FLT_NATARG_CNT) { pd->inmemory = false; pd->regoff = reguse; reguse++; md->argfltreguse = reguse; } else { pd->inmemory = true; pd->regoff = reguse * 8; reguse++; } break; } if (i >= min_nat_regs) stacksize++; } /* Since O0 is used for passing return values, this */ /* argument register usage has to be regarded, too */ if (IS_INT_LNG_TYPE(md->returntype.type)) { if (reguse < 1) md->argintreguse = 1; } /* fill register and stack usage */ md->memuse = stacksize; } /* md_return_alloc ************************************************************* XXX *******************************************************************************/ void md_return_alloc(jitdata *jd, stackelement_t* stackslot) { /* XXX */ } /* * These are local overrides for various environment variables in Emacs. * Please do not remove this and leave it at the end of the file, where * Emacs will automagically detect them. * --------------------------------------------------------------------- * Local variables: * mode: c * indent-tabs-mode: t * c-basic-offset: 4 * tab-width: 4 * End: * vim:noexpandtab:sw=4:ts=4: */