mirror of https://github.com/ZDoom/raze-gles.git
258 lines
6.7 KiB
C++
258 lines
6.7 KiB
C++
/*
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** vmexec.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright -2016 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include <math.h>
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#include <assert.h>
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#include "v_video.h"
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#include "s_soundinternal.h"
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#include "basics.h"
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//#include "r_state.h"
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#include "stats.h"
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#include "vmintern.h"
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#include "types.h"
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#include "basics.h"
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#include "texturemanager.h"
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#include "palutil.h"
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extern cycle_t VMCycles[10];
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extern int VMCalls[10];
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// THe sprite ID to string cast is game specific so let's do it with a callback to remove the dependency and allow easier reuse.
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void (*VM_CastSpriteIDToString)(FString* a, unsigned int b) = [](FString* a, unsigned int b) { a->Format("%d", b); };
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// intentionally implemented in a different source file to prevent inlining.
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#if 0
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void ThrowVMException(VMException *x);
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#endif
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#define IMPLEMENT_VMEXEC
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#if !defined(COMPGOTO) && defined(__GNUC__)
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#define COMPGOTO 1
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#endif
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#if COMPGOTO
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#define OP(x) x
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#define NEXTOP do { pc++; unsigned op = pc->op; a = pc->a; goto *ops[op]; } while(0)
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#else
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#define OP(x) case OP_##x
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#define NEXTOP pc++; break
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#endif
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#define luai_nummod(a,b) ((a) - floor((a)/(b))*(b))
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#define A (pc[0].a)
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#define B (pc[0].b)
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#define C (pc[0].c)
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#define Cs (pc[0].cs)
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#define BC (pc[0].i16u)
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#define BCs (pc[0].i16)
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#define ABCs (pc[0].i24)
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#define JMPOFS(x) ((x)->i24)
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#define KC (konstd[C])
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#define RC (reg.d[C])
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#define PA (reg.a[A])
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#define PB (reg.a[B])
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#define ASSERTD(x) assert((unsigned)(x) < f->NumRegD)
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#define ASSERTF(x) assert((unsigned)(x) < f->NumRegF)
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#define ASSERTA(x) assert((unsigned)(x) < f->NumRegA)
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#define ASSERTS(x) assert((unsigned)(x) < f->NumRegS)
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#define ASSERTKD(x) assert(sfunc != NULL && (unsigned)(x) < sfunc->NumKonstD)
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#define ASSERTKF(x) assert(sfunc != NULL && (unsigned)(x) < sfunc->NumKonstF)
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#define ASSERTKA(x) assert(sfunc != NULL && (unsigned)(x) < sfunc->NumKonstA)
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#define ASSERTKS(x) assert(sfunc != NULL && (unsigned)(x) < sfunc->NumKonstS)
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#define CMPJMP(test) \
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if ((test) == (a & CMP_CHECK)) { \
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assert(pc[1].op == OP_JMP); \
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pc += 1 + JMPOFS(pc+1); \
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} else { \
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pc += 1; \
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}
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#define GETADDR(a,o,x) \
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if (a == NULL) { ThrowAbortException(x, nullptr); return 0; } \
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ptr = (VM_SBYTE *)a + o
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#ifdef NDEBUG
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#define WAS_NDEBUG 1
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#else
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#define WAS_NDEBUG 0
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#endif
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#if WAS_NDEBUG
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#undef NDEBUG
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#endif
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#undef assert
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#include <assert.h>
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struct VMExec_Checked
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{
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#include "vmexec.h"
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};
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#if WAS_NDEBUG
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#define NDEBUG
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#endif
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#if !WAS_NDEBUG
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#define NDEBUG
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#endif
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#undef assert
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#include <assert.h>
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struct VMExec_Unchecked
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{
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#include "vmexec.h"
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};
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#if !WAS_NDEBUG
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#undef NDEBUG
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#endif
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#undef assert
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#include <assert.h>
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int (*VMExec)(VMFunction *func, VMValue *params, int numparams, VMReturn *ret, int numret) =
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#ifdef NDEBUG
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VMExec_Unchecked::Exec
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#else
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VMExec_Checked::Exec
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#endif
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;
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// Note: If the VM is being used in multiple threads, this should be declared as thread_local.
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// ZDoom doesn't need this at the moment so this is disabled.
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thread_local VMFrameStack GlobalVMStack;
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//===========================================================================
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//
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// VMSelectEngine
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//
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// Selects the VM engine, either checked or unchecked. Default will decide
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// based on the NDEBUG preprocessor definition.
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//
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//===========================================================================
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void VMSelectEngine(EVMEngine engine)
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{
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switch (engine)
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{
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case VMEngine_Default:
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#ifdef NDEBUG
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VMExec = VMExec_Unchecked::Exec;
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#else
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#endif
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VMExec = VMExec_Checked::Exec;
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break;
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case VMEngine_Unchecked:
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VMExec = VMExec_Unchecked::Exec;
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break;
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case VMEngine_Checked:
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VMExec = VMExec_Checked::Exec;
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break;
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}
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}
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//===========================================================================
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//
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// VMFillParams
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//
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// Takes parameters from the parameter stack and stores them in the callee's
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// registers.
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//
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//===========================================================================
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void VMFillParams(VMValue *params, VMFrame *callee, int numparam)
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{
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unsigned int regd, regf, regs, rega;
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VMScriptFunction *calleefunc = static_cast<VMScriptFunction *>(callee->Func);
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const VMRegisters calleereg(callee);
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assert(calleefunc != NULL && !(calleefunc->VarFlags & VARF_Native));
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assert(numparam == calleefunc->NumArgs);
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assert(REGT_INT == 0 && REGT_FLOAT == 1 && REGT_STRING == 2 && REGT_POINTER == 3);
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regd = regf = regs = rega = 0;
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const uint8_t *reginfo = calleefunc->RegTypes;
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assert(reginfo != nullptr);
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for (int i = 0; i < calleefunc->NumArgs; ++i, reginfo++)
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{
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// copy all parameters to the local registers.
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VMValue &p = params[i];
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if (*reginfo < REGT_STRING)
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{
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if (*reginfo == REGT_INT)
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{
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calleereg.d[regd++] = p.i;
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}
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else // p.Type == REGT_FLOAT
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{
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calleereg.f[regf++] = p.f;
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}
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}
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else if (*reginfo == REGT_STRING)
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{
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calleereg.s[regs++] = p.s();
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}
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else
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{
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assert(*reginfo == REGT_POINTER);
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calleereg.a[rega++] = p.a;
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}
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}
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}
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#ifndef NDEBUG
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bool AssertObject(void * ob)
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{
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auto obj = (DObject*)ob;
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if (obj == nullptr) return true;
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#ifdef _MSC_VER
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__try
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{
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return obj->MagicID == DObject::MAGIC_ID;
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}
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__except (1)
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{
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return false;
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}
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#else
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// No SEH on non-Microsoft compilers. :(
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return obj->MagicID == DObject::MAGIC_ID;
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#endif
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}
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#endif
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