mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-12-01 00:12:27 +00:00
185 lines
4 KiB
C++
185 lines
4 KiB
C++
#include <math.h>
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#include "vm.h"
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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 { unsigned op = *pc; a = pc[1]; pc += 4; 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 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 - 3))
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#define B (*(pc - 2))
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#define C ( *(pc - 1))
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#define Cs (*(VM_SBYTE *)(pc - 1))
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#define BC (*(VM_UHALF *)(pc - 2))
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#define BCs (*(VM_SHALF *)(pc - 2))
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#ifdef WORDS_BIGENDIAN
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#define JMPOFS(x) ((*(VM_SWORD *)(x) << 8) >> 6)
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#else
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#define JMPOFS(x) ((*(VM_SWORD *)(x) >> 6) & ~3)
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#endif
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#define KC (konst[C])
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#define RC (reg.i[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 THROW(x)
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#define CMPJMP(test) \
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if ((test) == (a & CMP_CHECK)) { \
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assert(*pc == OP_JMP); \
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pc += 4 + JMPOFS(pc); \
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} else { \
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pc += 4; \
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}
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enum
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{
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X_READ_NIL,
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X_WRITE_NIL,
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X_TOO_MANY_TRIES,
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};
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#define GETADDR(a,o,x) \
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if (a == 0) { THROW(x); } \
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ptr = (VM_SBYTE *)a + x \
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static const VM_UWORD ZapTable[16] =
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{
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0x00000000, 0x000000FF, 0x0000FF00, 0x0000FFFF,
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0x00FF0000, 0x00FF00FF, 0x00FFFF00, 0x00FFFFFF,
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0xFF000000, 0xFF0000FF, 0xFF00FF00, 0xFF00FFFF,
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0xFFFF0000, 0xFFFF00FF, 0xFFFFFF00, 0xFFFFFFFF
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};
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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)(VMFrameStack *stack, const VM_UBYTE *pc, 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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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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VMExec = VMExec_Checked::Exec;
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#endif
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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 paramater 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->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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for (int i = 0; i < numparam; ++i)
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{
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VMValue &p = params[i];
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if (p.Type < REGT_STRING)
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{
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if (p.Type == 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 (p.Type == 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(p.Type == REGT_POINTER);
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calleereg.a[rega] = p.a;
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calleereg.atag[rega++] = p.atag;
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}
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}
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}
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