mirror of
https://github.com/DrBeef/ioq3quest.git
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1222 lines
39 KiB
C
1222 lines
39 KiB
C
/*
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===========================================================================
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Copyright (C) 2009 David S. Miller <davem@davemloft.net>
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Copyright (C) 2013,2014 SUSE Linux Products GmbH
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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ARMv7l VM by Ludwig Nussel <ludwig.nussel@suse.de>
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TODO: optimization
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Docu:
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http://www.coranac.com/tonc/text/asm.htm
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http://www.heyrick.co.uk/armwiki/Category:Opcodes
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ARMv7-A_ARMv7-R_DDI0406_2007.pdf
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/time.h>
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#include <time.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "vm_local.h"
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#define R0 0
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#define R1 1
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#define R2 2
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#define R3 3
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#define R4 4
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#define R12 12
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#define FP 11
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#define SP 13
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#define LR 14
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#define PC 15
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#define APSR_nzcv 15
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#define S14 14
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#define S15 15
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#define rOPSTACK 5
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#define rOPSTACKBASE 6
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#define rCODEBASE 7
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#define rPSTACK 8
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#define rDATABASE 9
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#define rDATAMASK 10
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#define bit(x) (1<<x)
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/* arm eabi, builtin gcc functions */
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int __aeabi_idiv (int, int);
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unsigned __aeabi_uidiv (unsigned, unsigned);
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void __aeabi_idivmod(void);
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void __aeabi_uidivmod(void);
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/* exit() won't be called but use it because it is marked with noreturn */
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#define DIE( reason, args... ) \
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do { \
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Com_Error(ERR_DROP, "vm_arm compiler error: " reason, ##args); \
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exit(1); \
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} while(0)
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/*
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* opcode information table:
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* - length of immediate value
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* - returned register type
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* - required register(s) type
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*/
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#define opImm0 0x0000 /* no immediate */
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#define opImm1 0x0001 /* 1 byte immadiate value after opcode */
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#define opImm4 0x0002 /* 4 bytes immediate value after opcode */
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#define opRet0 0x0000 /* returns nothing */
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#define opRetI 0x0004 /* returns integer */
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#define opRetF 0x0008 /* returns float */
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#define opRetIF (opRetI | opRetF) /* returns integer or float */
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#define opArg0 0x0000 /* requires nothing */
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#define opArgI 0x0010 /* requires integer(s) */
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#define opArgF 0x0020 /* requires float(s) */
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#define opArgIF (opArgI | opArgF) /* requires integer or float */
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#define opArg2I 0x0040 /* requires second argument, integer */
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#define opArg2F 0x0080 /* requires second argument, float */
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#define opArg2IF (opArg2I | opArg2F) /* requires second argument, integer or float */
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static const unsigned char vm_opInfo[256] =
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{
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[OP_UNDEF] = opImm0,
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[OP_IGNORE] = opImm0,
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[OP_BREAK] = opImm0,
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[OP_ENTER] = opImm4,
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/* OP_LEAVE has to accept floats, they will be converted to ints */
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[OP_LEAVE] = opImm4 | opRet0 | opArgIF,
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/* only STORE4 and POP use values from OP_CALL,
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* no need to convert floats back */
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[OP_CALL] = opImm0 | opRetI | opArgI,
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[OP_PUSH] = opImm0 | opRetIF,
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[OP_POP] = opImm0 | opRet0 | opArgIF,
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[OP_CONST] = opImm4 | opRetIF,
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[OP_LOCAL] = opImm4 | opRetI,
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[OP_JUMP] = opImm0 | opRet0 | opArgI,
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[OP_EQ] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_NE] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_LTI] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_LEI] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_GTI] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_GEI] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_LTU] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_LEU] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_GTU] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_GEU] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_EQF] = opImm4 | opRet0 | opArgF | opArg2F,
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[OP_NEF] = opImm4 | opRet0 | opArgF | opArg2F,
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[OP_LTF] = opImm4 | opRet0 | opArgF | opArg2F,
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[OP_LEF] = opImm4 | opRet0 | opArgF | opArg2F,
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[OP_GTF] = opImm4 | opRet0 | opArgF | opArg2F,
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[OP_GEF] = opImm4 | opRet0 | opArgF | opArg2F,
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[OP_LOAD1] = opImm0 | opRetI | opArgI,
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[OP_LOAD2] = opImm0 | opRetI | opArgI,
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[OP_LOAD4] = opImm0 | opRetIF| opArgI,
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[OP_STORE1] = opImm0 | opRet0 | opArgI | opArg2I,
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[OP_STORE2] = opImm0 | opRet0 | opArgI | opArg2I,
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[OP_STORE4] = opImm0 | opRet0 | opArgIF| opArg2I,
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[OP_ARG] = opImm1 | opRet0 | opArgIF,
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[OP_BLOCK_COPY] = opImm4 | opRet0 | opArgI | opArg2I,
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[OP_SEX8] = opImm0 | opRetI | opArgI,
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[OP_SEX16] = opImm0 | opRetI | opArgI,
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[OP_NEGI] = opImm0 | opRetI | opArgI,
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[OP_ADD] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_SUB] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_DIVI] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_DIVU] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_MODI] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_MODU] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_MULI] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_MULU] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_BAND] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_BOR] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_BXOR] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_BCOM] = opImm0 | opRetI | opArgI,
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[OP_LSH] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_RSHI] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_RSHU] = opImm0 | opRetI | opArgI | opArg2I,
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[OP_NEGF] = opImm0 | opRetF | opArgF,
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[OP_ADDF] = opImm0 | opRetF | opArgF | opArg2F,
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[OP_SUBF] = opImm0 | opRetF | opArgF | opArg2F,
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[OP_DIVF] = opImm0 | opRetF | opArgF | opArg2F,
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[OP_MULF] = opImm0 | opRetF | opArgF | opArg2F,
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[OP_CVIF] = opImm0 | opRetF | opArgI,
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[OP_CVFI] = opImm0 | opRetI | opArgF,
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};
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#ifdef DEBUG_VM
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static const char *opnames[256] = {
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"OP_UNDEF", "OP_IGNORE", "OP_BREAK", "OP_ENTER", "OP_LEAVE", "OP_CALL",
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"OP_PUSH", "OP_POP", "OP_CONST", "OP_LOCAL", "OP_JUMP",
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"OP_EQ", "OP_NE", "OP_LTI", "OP_LEI", "OP_GTI", "OP_GEI",
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"OP_LTU", "OP_LEU", "OP_GTU", "OP_GEU", "OP_EQF", "OP_NEF",
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"OP_LTF", "OP_LEF", "OP_GTF", "OP_GEF",
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"OP_LOAD1", "OP_LOAD2", "OP_LOAD4", "OP_STORE1", "OP_STORE2",
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"OP_STORE4", "OP_ARG", "OP_BLOCK_COPY",
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"OP_SEX8", "OP_SEX16",
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"OP_NEGI", "OP_ADD", "OP_SUB", "OP_DIVI", "OP_DIVU",
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"OP_MODI", "OP_MODU", "OP_MULI", "OP_MULU", "OP_BAND",
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"OP_BOR", "OP_BXOR", "OP_BCOM", "OP_LSH", "OP_RSHI", "OP_RSHU",
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"OP_NEGF", "OP_ADDF", "OP_SUBF", "OP_DIVF", "OP_MULF",
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"OP_CVIF", "OP_CVFI",
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};
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#define NOTIMPL(x) \
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do { Com_Error(ERR_DROP, "instruction not implemented: %s", opnames[x]); } while(0)
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#else
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#define NOTIMPL(x) \
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do { Com_Printf(S_COLOR_RED "instruction not implemented: %x\n", x); vm->compiled = qfalse; return; } while(0)
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#endif
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static void VM_Destroy_Compiled(vm_t *vm)
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{
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if (vm->codeBase) {
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if (munmap(vm->codeBase, vm->codeLength))
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Com_Printf(S_COLOR_RED "Memory unmap failed, possible memory leak\n");
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}
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vm->codeBase = NULL;
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}
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/*
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=================
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ErrJump
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Error handler for jump/call to invalid instruction number
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=================
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*/
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static void __attribute__((__noreturn__)) ErrJump(unsigned num)
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{
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Com_Error(ERR_DROP, "program tried to execute code outside VM (%x)", num);
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}
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static int asmcall(int call, int pstack)
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{
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// save currentVM so as to allow for recursive VM entry
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vm_t *savedVM = currentVM;
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int i, ret;
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// modify VM stack pointer for recursive VM entry
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currentVM->programStack = pstack - 4;
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if (sizeof(intptr_t) == sizeof(int)) {
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intptr_t *argPosition = (intptr_t *)((byte *)currentVM->dataBase + pstack + 4);
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argPosition[0] = -1 - call;
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ret = currentVM->systemCall(argPosition);
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} else {
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intptr_t args[MAX_VMSYSCALL_ARGS];
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args[0] = -1 - call;
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int *argPosition = (int *)((byte *)currentVM->dataBase + pstack + 4);
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for( i = 1; i < ARRAY_LEN(args); i++ )
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args[i] = argPosition[i];
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ret = currentVM->systemCall(args);
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}
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currentVM = savedVM;
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return ret;
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}
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void _emit(vm_t *vm, unsigned isn, int pass)
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{
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#if 0
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static int fd = -2;
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if (fd == -2)
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fd = open("code.bin", O_TRUNC|O_WRONLY|O_CREAT, 0644);
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if (fd > 0)
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write(fd, &isn, 4);
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#endif
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if (pass)
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memcpy(vm->codeBase+vm->codeLength, &isn, 4);
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vm->codeLength+=4;
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}
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#define emit(isn) _emit(vm, isn, pass)
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static unsigned char off8(unsigned val)
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{
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if (val&3)
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DIE("offset must be multiple of four");
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if (val > 1020)
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DIE("offset too large");
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return val>>2;
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}
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// ARM is really crazy ...
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static unsigned short rimm(unsigned val)
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{
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unsigned shift = 0;
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if (val < 256)
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return val;
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// rotate the value until it fits
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while (shift < 16 && (val>255 || !(val&3))) {
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val = (val&3)<<30 | val>>2;
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++shift;
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}
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if (shift > 15 || val > 255) {
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DIE("immediate cannot be encoded (%d, %d)\n", shift, val);
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}
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return (16-shift)<<8 | val;
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}
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// same as rimm but doesn't die, returns 0 if not encodable so don't call with zero as argument!
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static unsigned short can_encode(unsigned val)
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{
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unsigned shift = 0;
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if (!val)
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DIE("can_encode: invalid argument");
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if (val < 256)
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return val;
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// rotate the value until it fits
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while (shift < 16 && (val>255 || !(val&3))) {
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val = (val&3)<<30 | val>>2;
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++shift;
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}
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if (shift > 15 || val > 255) {
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return 0;
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}
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return (16-shift)<<8 | val;
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}
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#define PREINDEX (1<<24)
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#define rASR(i, reg) (0b10<<5 | ((i&31)<<7) | reg)
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#define rLSL(i, reg) (0b00<<5 | ((i&31)<<7) | reg)
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#define rLSR(i, reg) (0b01<<5 | ((i&31)<<7) | reg)
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#define rROR(i, reg) (0b11<<5 | ((i&31)<<7) | reg)
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// conditions
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#define EQ (0b0000<<28)
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#define NE (0b0001<<28)
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#define CS (0b0010<<28)
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#define HS CS
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#define CC (0b0011<<28)
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#define LO CC
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#define MI (0b0100<<28)
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#define PL (0b0101<<28)
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#define VS (0b0110<<28)
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#define VC (0b0111<<28)
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#define HI (0b1000<<28)
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#define LS (0b1001<<28)
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#define GE (0b1010<<28)
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#define LT (0b1011<<28)
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#define GT (0b1100<<28)
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#define LE (0b1101<<28)
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#define AL (0b1110<<28)
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#define cond(what, op) (what | (op&~AL))
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// XXX: v not correctly computed
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#define BKPT(v) (AL | 0b10010<<20 | ((v&~0xF)<<4) | 0b0111<<4 | (v&0xF))
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#define YIELD (0b110010<<20 | 0b1111<<12 | 1)
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#define NOP cond(AL, YIELD)
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// immediate value must fit in 0xFF!
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#define ANDi(dst, src, i) (AL | (0b001<<25) | (0b00000<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define EORi(dst, src, i) (AL | (0b001<<25) | (0b00010<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define SUBi(dst, src, i) (AL | (0b001<<25) | (0b00100<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define RSBi(dst, src, i) (AL | (0b001<<25) | (0b00110<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define ADDi(dst, src, i) (AL | (0b001<<25) | (0b01000<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define ADCi(dst, src, i) (AL | (0b001<<25) | (0b01010<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define SBCi(dst, src, i) (AL | (0b001<<25) | (0b01100<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define RSCi(dst, src, i) (AL | (0b001<<25) | (0b01110<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define ORRi(dst, src, i) (AL | (0b001<<25) | (0b11000<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define MOVi(dst, i) (AL | (0b001<<25) | (0b11010<<20) | (dst<<12) | rimm(i))
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#define BICi(dst, src, i) (AL | (0b001<<25) | (0b11100<<20) | (src<<16) | (dst<<12) | rimm(i))
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#define MVNi(dst, i) (AL | (0b001<<25) | (0b11110<<20) | (dst<<12) | rimm(i))
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#define MOVW(dst, i) (AL | (0b11<<24) | ((((i)>>12)&0xF)<<16) | (dst<<12) | ((i)&((1<<12)-1)))
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#define MOVT(dst, i) (AL | (0b11<<24) | (0b0100<<20) | ((((i)>>12)&0xF)<<16) | (dst<<12) | ((i)&((1<<12)-1)))
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#define TSTi( src, i) (AL | (0b001<<25) | (0b10001<<20) | (src<<16) | rimm(i))
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#define TEQi( src, i) (AL | (0b001<<25) | (0b10011<<20) | (src<<16) | rimm(i))
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#define CMPi( src, i) (AL | (0b001<<25) | (0b10101<<20) | (src<<16) | rimm(i))
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#define CMNi( src, i) (AL | (0b001<<25) | (0b10111<<20) | (src<<16) | rimm(i))
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#define ANDSi(dst, src, i) (ANDi(dst, src, i) | (1<<20))
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#define EORSi(dst, src, i) (EORi(dst, src, i) | (1<<20))
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#define SUBSi(dst, src, i) (SUBi(dst, src, i) | (1<<20))
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#define RSBSi(dst, src, i) (RSBi(dst, src, i) | (1<<20))
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#define ADDSi(dst, src, i) (ADDi(dst, src, i) | (1<<20))
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#define ADCSi(dst, src, i) (ADCi(dst, src, i) | (1<<20))
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#define SBCSi(dst, src, i) (SBCi(dst, src, i) | (1<<20))
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#define RSCSi(dst, src, i) (RSCi(dst, src, i) | (1<<20))
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#define ORRSi(dst, src, i) (ORRi(dst, src, i) | (1<<20))
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#define MOVSi(dst, i) (MOVi(dst, i) | (1<<20))
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#define BICSi(dst, src, i) (BICi(dst, src, i) | (1<<20))
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#define MVNSi(dst, i) (MVNi(dst, src, i) | (1<<20))
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#define AND(dst, src, reg) (AL | (0b000<<25) | (0b00000<<20) | (src<<16) | (dst<<12) | reg)
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#define EOR(dst, src, reg) (AL | (0b000<<25) | (0b00010<<20) | (src<<16) | (dst<<12) | reg)
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#define SUB(dst, src, reg) (AL | (0b000<<25) | (0b00100<<20) | (src<<16) | (dst<<12) | reg)
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|
#define RSB(dst, src, reg) (AL | (0b000<<25) | (0b00110<<20) | (src<<16) | (dst<<12) | reg)
|
|
#define ADD(dst, src, reg) (AL | (0b000<<25) | (0b01000<<20) | (src<<16) | (dst<<12) | reg)
|
|
#define ADC(dst, src, reg) (AL | (0b000<<25) | (0b01010<<20) | (src<<16) | (dst<<12) | reg)
|
|
#define SBC(dst, src, reg) (AL | (0b000<<25) | (0b01100<<20) | (src<<16) | (dst<<12) | reg)
|
|
#define RSC(dst, src, reg) (AL | (0b000<<25) | (0b01110<<20) | (src<<16) | (dst<<12) | reg)
|
|
|
|
#define ORR(dst, src, reg) (AL | (0b000<<25) | (0b11000<<20) | (src<<16) | (dst<<12) | reg)
|
|
#define MOV(dst, src) (AL | (0b000<<25) | (0b11010<<20) | (dst<<12) | src)
|
|
|
|
#define LSL(dst, src, reg) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | (reg<<8) | (0b0001<<4) | src)
|
|
#define LSR(dst, src, reg) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | (reg<<8) | (0b0011<<4) | src)
|
|
#define ASR(dst, src, reg) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | (reg<<8) | (0b0101<<4) | src)
|
|
#define ROR(dst, src, reg) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | (reg<<8) | (0b0111<<4) | src)
|
|
|
|
#define LSLi(dst, src, i) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | ((i&0x1F)<<7) | (0b000<<4) | src)
|
|
#define LSRi(dst, src, i) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | ((i&0x1F)<<7) | (0b010<<4) | src)
|
|
#define ASRi(dst, src, i) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | ((i&0x1F)<<7) | (0b100<<4) | src)
|
|
#define RORi(dst, src, i) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | ((i&0x1F)<<7) | (0b110<<4) | src)
|
|
#define RRX(dst, src) (AL | (0b000<<25) | (0b1101<<21) | (0<<20) | (dst<<12) | (0b110<<4) | src)
|
|
|
|
#define BIC(dst, src, reg) (AL | (0b000<<25) | (0b11100<<20) | (src<<16) | (dst<<12) | reg)
|
|
#define MVN(dst, reg) (AL | (0b000<<25) | (0b11110<<20) | (dst<<12) | reg)
|
|
|
|
#define TST( src, reg) (AL | (0b000<<25) | (0b10001<<20) | (src<<16) | reg)
|
|
#define TEQ( src, reg) (AL | (0b000<<25) | (0b10011<<20) | (src<<16) | reg)
|
|
#define CMP( src, reg) (AL | (0b000<<25) | (0b10101<<20) | (src<<16) | reg)
|
|
#define CMN( src, reg) (AL | (0b000<<25) | (0b10111<<20) | (src<<16) | reg)
|
|
|
|
#define LDRa(dst, base, off) (AL | (0b011<<25) | (0b1100<<21) | (1<<20) | base<<16 | dst<<12 | off)
|
|
#define LDRx(dst, base, off) (AL | (0b011<<25) | (0b1000<<21) | (1<<20) | base<<16 | dst<<12 | off)
|
|
|
|
#define LDRai(dst, base, off) (AL | (0b010<<25) | (0b1100<<21) | (1<<20) | base<<16 | dst<<12 | rimm(off))
|
|
#define LDRxi(dst, base, off) (AL | (0b010<<25) | (0b1000<<21) | (1<<20) | base<<16 | dst<<12 | rimm(off))
|
|
#define LDRxiw(dst, base, off) (AL | (0b010<<25) | (0b1001<<21) | (1<<20) | base<<16 | dst<<12 | rimm(off))
|
|
|
|
#define LDRTa(dst, base, off) (AL | (0b011<<25) | (0b0101<<21) | (1<<20) | base<<16 | dst<<12 | off)
|
|
#define LDRTx(dst, base, off) (AL | (0b011<<25) | (0b0001<<21) | (1<<20) | base<<16 | dst<<12 | off)
|
|
#define LDRTai(dst, base, off) (AL | (0b010<<25) | (0b0101<<21) | (1<<20) | base<<16 | dst<<12 | rimm(off))
|
|
#define LDRTxi(dst, base, off) (AL | (0b010<<25) | (0b0001<<21) | (1<<20) | base<<16 | dst<<12 | rimm(off))
|
|
|
|
#define LDRBa(dst, base, off) (AL | (0b011<<25) | (0b1110<<21) | (1<<20) | base<<16 | dst<<12 | off)
|
|
#define LDRSBai(dst, base, off) (AL | (0b000<<25) | (0b0110<<21) | (1<<20) | base<<16 | dst<<12 | ((off&0xF0)<<4)|0b1101<<4|(off&0x0F))
|
|
#define STRBa(dst, base, off) (AL | (0b011<<25) | (0b1110<<21) | (0<<20) | base<<16 | dst<<12 | off)
|
|
|
|
#define LDRHa(dst, base, off) (AL | (0b000<<25) | (0b1100<<21) | (1<<20) | base<<16 | dst<<12 | (0b1011<<4) | off)
|
|
#define LDRSHai(dst, base, off) (AL | (0b000<<25) | (0b1110<<21) | (1<<20) | base<<16 | dst<<12 | ((off&0xF0)<<4)|0b1111<<4|(off&0x0F))
|
|
#define STRHa(dst, base, off) (AL | (0b000<<25) | (0b1100<<21) | (0<<20) | base<<16 | dst<<12 | (0b1011<<4) | off)
|
|
|
|
#define STRa(dst, base, off) (AL | (0b011<<25) | (0b1100<<21) | (0<<20) | base<<16 | dst<<12 | off)
|
|
#define STRx(dst, base, off) (AL | (0b011<<25) | (0b1000<<21) | (0<<20) | base<<16 | dst<<12 | off)
|
|
#define STRai(dst, base, off) (AL | (0b010<<25) | (0b1100<<21) | (0<<20) | base<<16 | dst<<12 | rimm(off))
|
|
#define STRxi(dst, base, off) (AL | (0b010<<25) | (0b1000<<21) | (0<<20) | base<<16 | dst<<12 | rimm(off))
|
|
#define STRaiw(dst, base, off) (AL | (0b010<<25) | (0b1101<<21) | (0<<20) | base<<16 | dst<<12 | rimm(off))
|
|
#define STRxiw(dst, base, off) (AL | (0b010<<25) | (0b1001<<21) | (0<<20) | base<<16 | dst<<12 | rimm(off))
|
|
|
|
// load with post-increment
|
|
#define POP1(reg) (AL | (0b010<<25) | (0b0100<<21) | (1<<20) | SP<<16 | reg<<12 | reg)
|
|
// store with post-increment
|
|
#define PUSH1(reg) (AL | (0b010<<25) | (0b1001<<21) | (0<<20) | SP<<16 | reg<<12 | 4)
|
|
|
|
// branch to target address (for small jumps)
|
|
#define Bi(i) \
|
|
(AL | (0b10)<<26 | (1<<25) /*I*/ | (0<<24) /*L*/ | (i))
|
|
// call subroutine
|
|
#define BLi(i) \
|
|
(AL | (0b10)<<26 | (1<<25) /*I*/ | (1<<24) /*L*/ | (i))
|
|
// branch and exchange (register)
|
|
#define BX(reg) \
|
|
(AL | 0b00010010<<20 | 0b1111<<16 | 0b1111<<12 | 0b1111<<8| 0b0001<<4 | reg)
|
|
// call subroutine (register)
|
|
#define BLX(reg) \
|
|
(AL | 0b00010010<<20 | 0b1111<<16 | 0b1111<<12 | 0b1111<<8| 0b0011<<4 | reg)
|
|
|
|
#define PUSH(mask) (AL | (0b100100<<22) | (0b10<<20) | (0b1101<<16) | mask)
|
|
#define PUSH2(r1, r2) (AL | (0b100100<<22) | (0b10<<20) | (0b1101<<16) | 1<<r1 | 1<<r2)
|
|
//#define PUSH1(reg) STRxiw(SP, reg, 4)
|
|
|
|
#define POP(mask) (0xe8bd0000|mask)
|
|
|
|
#define STM(base, regs) \
|
|
(AL | 0b100<<25 | 0<<24/*P*/| 0<<24/*U*/| 0<<24/*S*/| 0<<24/*W*/ | (base<<16) | (regs&~(1<<16)))
|
|
|
|
// note: op1 and op2 must not be the same
|
|
#define MUL(op1, op2, op3) \
|
|
(AL | 0b0000000<<21 | (1<<20) /*S*/ | (op1<<16) | (op3<<8) | 0b1001<<4 | (op2))
|
|
|
|
// puts integer in R0
|
|
#define emit_MOVR0i(arg) emit_MOVRxi(R0, arg)
|
|
|
|
// puts integer arg in register reg
|
|
#define emit_MOVRxi(reg, arg) do { \
|
|
emit(MOVW(reg, (arg&0xFFFF))); \
|
|
if (arg > 0xFFFF) \
|
|
emit(MOVT(reg, (((arg>>16)&0xFFFF)))); \
|
|
} while(0)
|
|
|
|
// puts integer arg in register reg. adds nop if only one instr is needed to
|
|
// make size constant
|
|
#define emit_MOVRxi_or_NOP(reg, arg) do { \
|
|
emit(MOVW(reg, (arg&0xFFFF))); \
|
|
if (arg > 0xFFFF) \
|
|
emit(MOVT(reg, (((arg>>16)&0xFFFF)))); \
|
|
else \
|
|
emit(NOP); \
|
|
} while(0)
|
|
|
|
// arm core register -> singe precision register
|
|
#define VMOVass(Vn, Rt) (AL|(0b1110<<24)|(0b000<<21)|(0<<20)| ((Vn>>1)<<16) | (Rt<<12) | (0b1010<<8) | ((Vn&1)<<7) | (1<<4))
|
|
// singe precision register -> arm core register
|
|
#define VMOVssa(Rt, Vn) (AL|(0b1110<<24)|(0b000<<21)|(1<<20)| ((Vn>>1)<<16) | (Rt<<12) | (0b1010<<8) | ((Vn&1)<<7) | (1<<4))
|
|
|
|
#define _VCVT_F(Vd, Vm, opc2, op) \
|
|
(AL|(0b11101<<23)|((Vd&1)<<22)|(0b111<<19)|(opc2<<16)|((Vd>>1)<<12)|(0b101<<9)|(0<<8)|(op<<7)|(1<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
#define VCVT_F32_U32(Sd, Sm) _VCVT_F(Sd, Sm, 0b000, 0 /* unsigned */)
|
|
#define VCVT_U32_F32(Sd, Sm) _VCVT_F(Sd, Sm, 0b100, 1 /* round zero */)
|
|
#define VCVT_F32_S32(Sd, Sm) _VCVT_F(Sd, Sm, 0b000, 1 /* unsigned */)
|
|
#define VCVT_S32_F32(Sd, Sm) _VCVT_F(Sd, Sm, 0b101, 1 /* round zero */)
|
|
|
|
#define VLDRa(Vd, Rn, i) (AL|(0b1101<<24)|1<<23|((Vd&1)<<22)|1<<20|(Rn<<16)|((Vd>>1)<<12)|(0b1010<<8)|off8(i))
|
|
#define VSTRa(Vd, Rn, i) (AL|(0b1101<<24)|1<<23|((Vd&1)<<22)|0<<20|(Rn<<16)|((Vd>>1)<<12)|(0b1010<<8)|off8(i))
|
|
|
|
#define VNEG_F32(Vd, Vm) \
|
|
(AL|(0b11101<<23)|((Vd&1)<<22)|(0b11<<20)|(1<<16)|((Vd>>1)<<12)|(0b101<<9)|(0<<8)|(1<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
|
|
#define VADD_F32(Vd, Vn, Vm) \
|
|
(AL|(0b11100<<23)|((Vd&1)<<22)|(0b11<<20)|((Vn>>1)<<16)|((Vd>>1)<<12)|(0b101<<9)|(0<<8)|((Vn&1)<<7)|(0<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
#define VSUB_F32(Vd, Vn, Vm) \
|
|
(AL|(0b11100<<23)|((Vd&1)<<22)|(0b11<<20)|((Vn>>1)<<16)|((Vd>>1)<<12)|(0b101<<9)|(0<<8)|((Vn&1)<<7)|(1<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
#define VMUL_F32(Vd, Vn, Vm) \
|
|
(AL|(0b11100<<23)|((Vd&1)<<22)|(0b10<<20)|((Vn>>1)<<16)|((Vd>>1)<<12)|(0b101)<<9|(0<<8)|((Vn&1)<<7)|(0<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
#define VDIV_F32(Vd, Vn, Vm) \
|
|
(AL|(0b11101<<23)|((Vd&1)<<22)|(0b00<<20)|((Vn>>1)<<16)|((Vd>>1)<<12)|(0b101<<9)|(0<<8)|((Vn&1)<<7)|(0<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
|
|
#define _VCMP_F32(Vd, Vm, E) \
|
|
(AL|(0b11101<<23)|((Vd&1)<<22)|(0b11<<20)|((0b0100)<<16)|((Vd>>1)<<12)|(0b101<<9)|(0<<8)|(E<<7)|(1<<6)|((Vm&1)<<5)|(Vm>>1))
|
|
#define VCMP_F32(Vd, Vm) _VCMP_F32(Vd, Vm, 0)
|
|
|
|
#define VMRS(Rt) \
|
|
(AL|(0b11101111<<20)|(0b0001<<16)|(Rt<<12)|(0b1010<<8)|(1<<4))
|
|
|
|
// check if instruction in R0 is within range. Clobbers R1, R12
|
|
#define CHECK_JUMP do { \
|
|
static int bytes_to_skip = -1; \
|
|
static unsigned branch = -1; \
|
|
emit_MOVRxi(R1, (unsigned)vm->instructionCount); \
|
|
emit(CMP(R0, R1)); \
|
|
if (branch == -1) \
|
|
branch = vm->codeLength; \
|
|
emit(cond(LT, Bi(j_rel(bytes_to_skip)))); \
|
|
emit_MOVRxi_or_NOP(R12, (unsigned)ErrJump); \
|
|
emit(BLX(R12)); \
|
|
if (bytes_to_skip == -1) \
|
|
bytes_to_skip = vm->codeLength - branch; \
|
|
} while(0)
|
|
|
|
//#define CONST_OPTIMIZE
|
|
#ifdef CONST_OPTIMIZE
|
|
#define MAYBE_EMIT_CONST() \
|
|
if (got_const) \
|
|
{ \
|
|
got_const = 0; \
|
|
vm->instructionPointers[instruction-1] = assembler_get_code_size(); \
|
|
STACK_PUSH(4); \
|
|
emit("movl $%d, (%%r9, %%rbx, 4)", const_value); \
|
|
}
|
|
#else
|
|
#define MAYBE_EMIT_CONST()
|
|
#endif
|
|
|
|
// optimize: use load multiple
|
|
#define IJ(comparator) do { \
|
|
MAYBE_EMIT_CONST(); \
|
|
emit_MOVRxi(R0, arg.i); \
|
|
CHECK_JUMP; \
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); \
|
|
emit(LDRTxi(R1, rOPSTACK, 4)); \
|
|
emit(CMP(R1, R0)); \
|
|
emit(cond(comparator, Bi(j_rel(vm->instructionPointers[arg.i]-vm->codeLength)))); \
|
|
} while (0)
|
|
|
|
#define FJ(comparator) do { \
|
|
emit_MOVRxi(R0, arg.i); \
|
|
CHECK_JUMP; \
|
|
emit(SUBi(rOPSTACK, rOPSTACK, 8)); \
|
|
emit(VLDRa(S15, rOPSTACK, 4)); \
|
|
emit(VLDRa(S14, rOPSTACK, 8)); \
|
|
emit(VCMP_F32(S15, S14)); \
|
|
emit(VMRS(APSR_nzcv)); \
|
|
emit(cond(comparator, Bi(j_rel(vm->instructionPointers[arg.i]-vm->codeLength)))); \
|
|
} while (0)
|
|
|
|
#define printreg(reg) emit(PUSH1(R3)); emit(BLX(reg)); emit(POP1(R3));
|
|
|
|
static inline unsigned _j_rel(int x, int pc)
|
|
{
|
|
if (x&3) goto err;
|
|
x = (x>>2)-2;
|
|
if (x < 0)
|
|
{
|
|
if ((x&(0xFF<<24)) != 0xFF<<24)
|
|
goto err;
|
|
x &= ~(0xFF<<24);
|
|
}
|
|
else if (x&(0xFF<<24))
|
|
goto err;
|
|
return x;
|
|
err:
|
|
DIE("jump %d out of range at %d", x, pc);
|
|
}
|
|
|
|
void VM_Compile(vm_t *vm, vmHeader_t *header)
|
|
{
|
|
unsigned char *code;
|
|
int i_count, pc = 0;
|
|
int pass;
|
|
int codeoffsets[2]; // was 1024 but it's only used for OFF_CODE and OFF_IMMEDIATES
|
|
|
|
#define j_rel(x) (pass?_j_rel(x, pc):0xBAD)
|
|
#define OFFSET(i) (pass?(j_rel(codeoffsets[i]-vm->codeLength)):(0xF000000F))
|
|
//#define new_offset() (offsidx++)
|
|
#define get_offset(i) (codeoffsets[i])
|
|
#define save_offset(i) (codeoffsets[i] = vm->codeLength)
|
|
#define OFF_CODE 0
|
|
#define OFF_IMMEDIATES 1
|
|
|
|
vm->compiled = qfalse;
|
|
|
|
vm->codeBase = NULL;
|
|
vm->codeLength = 0;
|
|
|
|
for (pass = 0; pass < 2; ++pass) {
|
|
|
|
// int offsidx = 0;
|
|
|
|
#ifdef CONST_OPTIMIZE
|
|
// const optimization
|
|
unsigned got_const = 0, const_value = 0;
|
|
#endif
|
|
|
|
if(pass)
|
|
{
|
|
vm->codeBase = mmap(NULL, vm->codeLength, PROT_WRITE, MAP_SHARED|MAP_ANONYMOUS, -1, 0);
|
|
if(vm->codeBase == MAP_FAILED)
|
|
Com_Error(ERR_FATAL, "VM_CompileARM: can't mmap memory");
|
|
vm->codeLength = 0;
|
|
}
|
|
|
|
//int (*entry)(vm_t*, int*, int*);
|
|
emit(PUSH((((1<<8)-1)<<4)|(1<<14))); // push R4-R11, LR
|
|
emit(SUBi(SP, SP, 12)); // align stack!
|
|
emit(LDRai(rCODEBASE, R0, offsetof(vm_t, codeBase)));
|
|
emit(LDRai(rDATABASE, R0, offsetof(vm_t, dataBase)));
|
|
emit(LDRai(rDATAMASK, R0, offsetof(vm_t, dataMask)));
|
|
emit(LDRai(rPSTACK, R1, 0));
|
|
emit(MOV(rOPSTACK, R2)); // TODO: reverse opstack to avoid writing to return address
|
|
emit(MOV(rOPSTACKBASE, rOPSTACK));
|
|
|
|
emit(BLi(OFFSET(OFF_CODE)));
|
|
|
|
// save return value in r0
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
|
|
emit(ADDi(SP, SP, 12)); // align stack!
|
|
emit(POP((((1<<8)-1)<<4)|(1<<15))); // pop R4-R11, LR -> PC
|
|
|
|
/* save some immediates here */
|
|
emit(BKPT(0));
|
|
emit(BKPT(0));
|
|
save_offset(OFF_IMMEDIATES);
|
|
// emit((unsigned)whatever);
|
|
emit(BKPT(0));
|
|
emit(BKPT(0));
|
|
|
|
save_offset(OFF_CODE);
|
|
// offsidx = OFF_IMMEDIATES+1;
|
|
|
|
code = (unsigned char *) header + header->codeOffset;
|
|
pc = 0;
|
|
|
|
for (i_count = 0; i_count < header->instructionCount; i_count++) {
|
|
union {
|
|
unsigned char b[4];
|
|
unsigned int i;
|
|
} arg;
|
|
unsigned char op = code[pc++];
|
|
|
|
vm->instructionPointers[i_count] = vm->codeLength;
|
|
|
|
if (vm_opInfo[op] & opImm4)
|
|
{
|
|
memcpy(arg.b, &code[pc], 4);
|
|
pc += 4;
|
|
#ifdef EXCESSIVE_DEBUG
|
|
Com_Printf("%d: instruction %d (%s %d), offset %d\n", pass, i_count, opnames[op], arg.i, vm->codeLength);
|
|
#endif
|
|
}
|
|
else if (vm_opInfo[op] & opImm1)
|
|
{
|
|
arg.b[0] = code[pc];
|
|
++pc;
|
|
#ifdef EXCESSIVE_DEBUG
|
|
Com_Printf("%d: instruction %d (%s %hhd), offset %d\n", pass, i_count, opnames[op], arg.i, vm->codeLength);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
#ifdef EXCESSIVE_DEBUG
|
|
Com_Printf("%d: instruction %d (%s), offset %d\n", pass, i_count, opnames[op], vm->codeLength);
|
|
#endif
|
|
}
|
|
|
|
// TODO: for debug only
|
|
//emit_MOVRxi(R4, i_count);
|
|
|
|
switch ( op )
|
|
{
|
|
case OP_UNDEF:
|
|
break;
|
|
|
|
case OP_IGNORE:
|
|
NOTIMPL(op);
|
|
break;
|
|
|
|
case OP_BREAK:
|
|
emit(BKPT(0));
|
|
break;
|
|
|
|
case OP_ENTER:
|
|
MAYBE_EMIT_CONST();
|
|
emit(PUSH1(LR));
|
|
emit(SUBi(SP, SP, 12)); // align stack
|
|
if (arg.i == 0 || can_encode(arg.i))
|
|
{
|
|
emit(SUBi(rPSTACK, rPSTACK, arg.i)); // pstack -= arg
|
|
}
|
|
else
|
|
{
|
|
emit_MOVR0i(arg.i);
|
|
emit(SUB(rPSTACK, rPSTACK, R0)); // pstack -= arg
|
|
}
|
|
break;
|
|
|
|
case OP_LEAVE:
|
|
if (arg.i == 0 || can_encode(arg.i))
|
|
{
|
|
emit(ADDi(rPSTACK, rPSTACK, arg.i)); // pstack += arg
|
|
}
|
|
else
|
|
{
|
|
emit_MOVR0i(arg.i);
|
|
emit(ADD(rPSTACK, rPSTACK, R0)); // pstack += arg
|
|
}
|
|
emit(ADDi(SP, SP, 12));
|
|
emit(0xe49df004); // pop pc
|
|
break;
|
|
|
|
case OP_CALL:
|
|
#if 0
|
|
// save next instruction
|
|
emit_MOVR0i(i_count);
|
|
emit(STRa(R0, rDATABASE, rPSTACK)); // dataBase[pstack] = r0
|
|
#endif
|
|
#ifdef CONST_OPTIMIZE
|
|
if (got_const)
|
|
{
|
|
NOTIMPL(op);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
static int bytes_to_skip = -1;
|
|
static unsigned start_block = -1;
|
|
MAYBE_EMIT_CONST();
|
|
// get instruction nr from stack
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
emit(CMPi(R0, 0)); // check if syscall
|
|
if (start_block == -1)
|
|
start_block = vm->codeLength;
|
|
emit(cond(LT, Bi(j_rel(bytes_to_skip))));
|
|
CHECK_JUMP;
|
|
emit_MOVRxi_or_NOP(R1, (unsigned)vm->instructionPointers);
|
|
emit(LDRa(R0, R1, rLSL(2, R0))); // r0 = ((int*)r1)[r0]
|
|
emit(ADD(R0, rCODEBASE, R0)); // r0 = codeBase+r0
|
|
emit(BLX(R0));
|
|
emit(Bi(j_rel(vm->instructionPointers[i_count+1]-vm->codeLength)));
|
|
if (bytes_to_skip == -1)
|
|
bytes_to_skip = vm->codeLength - start_block;
|
|
emit(MOV(R1, rPSTACK));
|
|
emit_MOVRxi(R12, (unsigned)asmcall);
|
|
emit(BLX(R12));
|
|
// store return value
|
|
emit(STRaiw(R0, rOPSTACK, 4)); // opstack+=4; *opstack = r0
|
|
}
|
|
break;
|
|
|
|
case OP_PUSH:
|
|
MAYBE_EMIT_CONST();
|
|
emit(ADDi(rOPSTACK, rOPSTACK, 4));
|
|
break;
|
|
|
|
case OP_POP:
|
|
MAYBE_EMIT_CONST();
|
|
emit(SUBi(rOPSTACK, rOPSTACK, 4));
|
|
break;
|
|
|
|
case OP_CONST:
|
|
MAYBE_EMIT_CONST();
|
|
emit_MOVR0i(arg.i);
|
|
emit(STRaiw(R0, rOPSTACK, 4)); // opstack+=4; *opstack = r0
|
|
break;
|
|
|
|
case OP_LOCAL:
|
|
MAYBE_EMIT_CONST();
|
|
if (arg.i == 0 || can_encode(arg.i))
|
|
{
|
|
emit(ADDi(R0, rPSTACK, arg.i)); // r0 = pstack+arg
|
|
}
|
|
else
|
|
{
|
|
emit_MOVR0i(arg.i);
|
|
emit(ADD(R0, rPSTACK, R0)); // r0 = pstack+arg
|
|
}
|
|
emit(STRaiw(R0, rOPSTACK, 4)); // opstack+=4; *opstack = r0
|
|
break;
|
|
|
|
case OP_JUMP:
|
|
#ifdef CONST_OPTIMIZE
|
|
if (got_const)
|
|
{
|
|
NOTIMPL(op);
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
CHECK_JUMP;
|
|
emit_MOVRxi(R1, (unsigned)vm->instructionPointers);
|
|
emit(LDRa(R0, R1, rLSL(2, R0))); // r0 = ((int*)r1)[r0]
|
|
emit(ADD(R0, rCODEBASE, R0)); // r0 = codeBase+r0
|
|
emit(BLX(R0));
|
|
}
|
|
break;
|
|
|
|
case OP_EQ:
|
|
IJ(EQ);
|
|
break;
|
|
|
|
case OP_NE:
|
|
IJ(NE);
|
|
break;
|
|
|
|
case OP_LTI:
|
|
IJ(LT);
|
|
break;
|
|
|
|
case OP_LEI:
|
|
IJ(LE);
|
|
break;
|
|
|
|
case OP_GTI:
|
|
IJ(GT);
|
|
break;
|
|
|
|
case OP_GEI:
|
|
IJ(GE);
|
|
break;
|
|
|
|
case OP_LTU:
|
|
IJ(LO);
|
|
break;
|
|
|
|
case OP_LEU:
|
|
IJ(LS);
|
|
break;
|
|
|
|
case OP_GTU:
|
|
IJ(HI);
|
|
break;
|
|
|
|
case OP_GEU:
|
|
IJ(HS);
|
|
break;
|
|
|
|
case OP_EQF:
|
|
FJ(EQ);
|
|
break;
|
|
|
|
case OP_NEF:
|
|
FJ(NE);
|
|
break;
|
|
|
|
case OP_LTF:
|
|
FJ(LT);
|
|
break;
|
|
|
|
case OP_LEF:
|
|
FJ(LE);
|
|
break;
|
|
|
|
case OP_GTF:
|
|
FJ(GT);
|
|
break;
|
|
|
|
case OP_GEF:
|
|
FJ(GE);
|
|
break;
|
|
|
|
case OP_LOAD1:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(AND(R0, rDATAMASK, R0)); // r0 = r0 & rDATAMASK
|
|
emit(LDRBa(R0, rDATABASE, R0)); // r0 = (unsigned char)dataBase[r0]
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_LOAD2:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(AND(R0, rDATAMASK, R0)); // r0 = r0 & rDATAMASK
|
|
emit(LDRHa(R0, rDATABASE, R0)); // r0 = (unsigned short)dataBase[r0]
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_LOAD4:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(AND(R0, rDATAMASK, R0)); // r0 = r0 & rDATAMASK
|
|
emit(LDRa(R0, rDATABASE, R0)); // r0 = dataBase[r0]
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_STORE1:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
emit(LDRTxi(R1, rOPSTACK, 4)); // r1 = *opstack; rOPSTACK -= 4
|
|
emit(AND(R1, rDATAMASK, R1)); // r1 = r1 & rDATAMASK
|
|
emit(STRBa(R0, rDATABASE, R1)); // database[r1] = r0
|
|
break;
|
|
|
|
case OP_STORE2:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
emit(LDRTxi(R1, rOPSTACK, 4)); // r1 = *opstack; rOPSTACK -= 4
|
|
emit(AND(R1, rDATAMASK, R1)); // r1 = r1 & rDATAMASK
|
|
emit(STRHa(R0, rDATABASE, R1)); // database[r1] = r0
|
|
break;
|
|
|
|
case OP_STORE4:
|
|
MAYBE_EMIT_CONST();
|
|
// optimize: use load multiple
|
|
// value
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
// pointer
|
|
emit(LDRTxi(R1, rOPSTACK, 4)); // r1 = *opstack; rOPSTACK -= 4
|
|
emit(AND(R1, rDATAMASK, R1)); // r1 = r1 & rDATAMASK
|
|
// store value at pointer
|
|
emit(STRa(R0, rDATABASE, R1)); // database[r1] = r0
|
|
break;
|
|
|
|
case OP_ARG:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRTxi(R0, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
emit(ADDi(R1, rPSTACK, arg.b[0])); // r1 = programStack+arg
|
|
emit(AND(R1, rDATAMASK, R1)); // r1 = r1 & rDATAMASK
|
|
emit(STRa(R0, rDATABASE, R1)); // dataBase[r1] = r0
|
|
break;
|
|
|
|
case OP_BLOCK_COPY:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRTxi(R1, rOPSTACK, 4)); // r0 = *opstack; rOPSTACK -= 4
|
|
emit(LDRTxi(R0, rOPSTACK, 4));
|
|
emit_MOVRxi(R2, arg.i);
|
|
emit_MOVRxi(R12, (unsigned)VM_BlockCopy);
|
|
emit(BLX(R12));
|
|
break;
|
|
|
|
case OP_SEX8:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRSBai(R0, rOPSTACK, 0)); // sign extend *opstack
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_SEX16:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRSHai(R0, rOPSTACK, 0)); // sign extend *opstack
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_NEGI:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(RSBi(R0, R0, 0)); // r0 = -r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_ADD:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(ADD(R0, R1, R0)); // r0 = r1 + r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_SUB:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(SUB(R0, R1, R0)); // r0 = r1 - r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_DIVI:
|
|
case OP_DIVU:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R1, rOPSTACK, 0)); // r1 = *opstack
|
|
emit(LDRxiw(R0, rOPSTACK, 4)); // opstack-=4; r0 = *opstack
|
|
if ( op == OP_DIVI )
|
|
emit_MOVRxi(R12, (unsigned)__aeabi_idiv);
|
|
else
|
|
emit_MOVRxi(R12, (unsigned)__aeabi_uidiv);
|
|
emit(BLX(R12));
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_MODI:
|
|
case OP_MODU:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R1, rOPSTACK, 0)); // r1 = *opstack
|
|
emit(LDRxiw(R0, rOPSTACK, 4)); // opstack-=4; r0 = *opstack
|
|
if ( op == OP_MODI )
|
|
emit_MOVRxi(R12, (unsigned)__aeabi_idivmod);
|
|
else
|
|
emit_MOVRxi(R12, (unsigned)__aeabi_uidivmod);
|
|
emit(BLX(R12));
|
|
emit(STRai(R1, rOPSTACK, 0)); // *opstack = r1
|
|
break;
|
|
|
|
case OP_MULI:
|
|
case OP_MULU:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(MUL(R0, R1, R0)); // r0 = r1 * r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_BAND:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(AND(R0, R1, R0)); // r0 = r1 & r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_BOR:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(ORR(R0, R1, R0)); // r0 = r1 | r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_BXOR:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(EOR(R0, R1, R0)); // r0 = r1 ^ r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_BCOM:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(MVN(R0, R0)); // r0 = ~r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_LSH:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(LSL(R0, R1, R0)); // r0 = r1 << r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_RSHI:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(ASR(R0, R1, R0)); // r0 = r1 >> r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_RSHU:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(LDRxiw(R1, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(LSR(R0, R1, R0)); // r0 = (unsigned)r1 >> r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
|
|
case OP_NEGF:
|
|
MAYBE_EMIT_CONST();
|
|
emit(VLDRa(S14, rOPSTACK, 0)); // s14 = *((float*)opstack)
|
|
emit(VNEG_F32(S14, S14)); // s15 = -s14
|
|
emit(VSTRa(S14, rOPSTACK, 0)); // *((float*)opstack) = s15
|
|
break;
|
|
|
|
case OP_ADDF:
|
|
MAYBE_EMIT_CONST();
|
|
emit(VLDRa(S14, rOPSTACK, 0)); // s14 = *((float*)opstack)
|
|
// vldr can't modify rOPSTACK so
|
|
// we'd either need to change it
|
|
// with sub or use regular ldr+vmov
|
|
emit(LDRxiw(R0, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(VMOVass(S15,R0)); // s15 = r0
|
|
emit(VADD_F32(S14, S15, S14)); // s14 = s14 + s15
|
|
emit(VSTRa(S14, rOPSTACK, 0)); // *((float*)opstack) = s15
|
|
break;
|
|
|
|
case OP_SUBF:
|
|
emit(VLDRa(S14, rOPSTACK, 0)); // s14 = *((float*)opstack)
|
|
// see OP_ADDF
|
|
emit(LDRxiw(R0, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(VMOVass(S15,R0)); // s15 = r0
|
|
emit(VSUB_F32(S14, S15, S14)); // s14 = s14 - s15
|
|
emit(VSTRa(S14, rOPSTACK, 0)); // *((float*)opstack) = s15
|
|
break;
|
|
|
|
case OP_DIVF:
|
|
emit(VLDRa(S14, rOPSTACK, 0)); // s14 = *((float*)opstack)
|
|
// see OP_ADDF
|
|
emit(LDRxiw(R0, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(VMOVass(S15,R0)); // s15 = r0
|
|
emit(VDIV_F32(S14, S15, S14)); // s14 = s14 / s15
|
|
emit(VSTRa(S14, rOPSTACK, 0)); // *((float*)opstack) = s15
|
|
break;
|
|
|
|
case OP_MULF:
|
|
emit(VLDRa(S14, rOPSTACK, 0)); // s14 = *((float*)opstack)
|
|
// see OP_ADDF
|
|
emit(LDRxiw(R0, rOPSTACK, 4)); // opstack-=4; r1 = *opstack
|
|
emit(VMOVass(S15,R0)); // s15 = r0
|
|
emit(VMUL_F32(S14, S15, S14)); // s14 = s14 * s15
|
|
emit(VSTRa(S14, rOPSTACK, 0)); // *((float*)opstack) = s15
|
|
break;
|
|
|
|
case OP_CVIF:
|
|
MAYBE_EMIT_CONST();
|
|
emit(LDRai(R0, rOPSTACK, 0)); // r0 = *opstack
|
|
emit(VMOVass(S14,R0)); // s14 = r0
|
|
emit(VCVT_F32_S32(S14, S14)); // s15 = (float)s14
|
|
emit(VSTRa(S14, rOPSTACK, 0)); // *((float*)opstack) = s15
|
|
break;
|
|
|
|
case OP_CVFI:
|
|
MAYBE_EMIT_CONST();
|
|
emit(VLDRa(S14, rOPSTACK, 0)); // s14 = *((float*)opstack)
|
|
emit(VCVT_S32_F32(S14, S14)); // s15 = (int)s14
|
|
emit(VMOVssa(R0,S14)); // s14 = r0
|
|
emit(STRai(R0, rOPSTACK, 0)); // *opstack = r0
|
|
break;
|
|
}
|
|
}
|
|
|
|
// never reached
|
|
emit(BKPT(0));
|
|
} // pass
|
|
|
|
if (mprotect(vm->codeBase, vm->codeLength, PROT_READ|PROT_EXEC/* |PROT_WRITE */)) {
|
|
VM_Destroy_Compiled(vm);
|
|
DIE("mprotect failed");
|
|
}
|
|
|
|
// clear icache, http://blogs.arm.com/software-enablement/141-caches-and-self-modifying-code/
|
|
__clear_cache(vm->codeBase, vm->codeBase+vm->codeLength);
|
|
|
|
vm->destroy = VM_Destroy_Compiled;
|
|
vm->compiled = qtrue;
|
|
}
|
|
|
|
int VM_CallCompiled(vm_t *vm, int *args)
|
|
{
|
|
byte stack[OPSTACK_SIZE + 15];
|
|
int *opStack;
|
|
int programStack = vm->programStack;
|
|
int stackOnEntry = programStack;
|
|
byte *image = vm->dataBase;
|
|
int *argPointer;
|
|
int retVal;
|
|
|
|
currentVM = vm;
|
|
|
|
vm->currentlyInterpreting = qtrue;
|
|
|
|
programStack -= ( 8 + 4 * MAX_VMMAIN_ARGS );
|
|
argPointer = (int *)&image[ programStack + 8 ];
|
|
memcpy( argPointer, args, 4 * MAX_VMMAIN_ARGS );
|
|
argPointer[-1] = 0;
|
|
argPointer[-2] = -1;
|
|
|
|
|
|
opStack = PADP(stack, 16);
|
|
*opStack = 0xDEADBEEF;
|
|
|
|
#if 0
|
|
Com_Printf("r5 opStack:\t\t%p\n", opStack);
|
|
Com_Printf("r7 codeBase:\t\t%p\n", vm->codeBase);
|
|
Com_Printf("r8 programStack:\t0x%x\n", programStack);
|
|
Com_Printf("r9 dataBase:\t\t%p\n", vm->dataBase);
|
|
#endif
|
|
|
|
/* call generated code */
|
|
{
|
|
//int (*entry)(void *, int, void *, int);
|
|
int (*entry)(vm_t*, int*, int*);
|
|
|
|
entry = (void *)(vm->codeBase);
|
|
//__asm__ volatile("bkpt");
|
|
//retVal = entry(vm->codeBase, programStack, vm->dataBase, vm->dataMask);
|
|
retVal = entry(vm, &programStack, opStack);
|
|
}
|
|
|
|
if(*opStack != 0xDEADBEEF)
|
|
{
|
|
Com_Error(ERR_DROP, "opStack corrupted in compiled code");
|
|
}
|
|
|
|
if(programStack != stackOnEntry - (8 + 4 * MAX_VMMAIN_ARGS))
|
|
Com_Error(ERR_DROP, "programStack corrupted in compiled code");
|
|
|
|
vm->programStack = stackOnEntry;
|
|
vm->currentlyInterpreting = qfalse;
|
|
|
|
return retVal;
|
|
}
|