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Major redesign of function call handling.

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Drop call gates. Use function headers, dispatched like bytecodes.
Emit BC_FUNCF/BC_FUNCV bytecode at PC 0 for all Lua functions.
C functions and ASM fast functions get extra bytecodes.
Modify internal calling convention: new base in BASE (formerly in RA).
Can now use better C function wrapper semantics (dynamic on/off).
Prerequisite for call hooks with zero-overhead if disabled.
Prerequisite for compiling recursive calls.
Prerequisite for efficient 32/64 bit prototype guards.
This commit is contained in:
Mike Pall
2010-02-13 04:51:56 +01:00
parent 4f8d7be8ea
commit c93138b59e
34 changed files with 4410 additions and 4264 deletions
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4
src/lj_asm.c
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@@ -906,7 +906,7 @@ static MCode *asm_exitstub_gen(ASMState *as, ExitNo group)
*mxp++ = MODRM(XM_OFS8, 0, RID_ESP);
*mxp++ = MODRM(XM_SCALE1, RID_ESP, RID_ESP);
*mxp++ = 2*sizeof(void *);
*(int32_t *)mxp = ptr2addr(GG2DISP(J2GG(as->J))); mxp += 4;
*(int32_t *)mxp = ptr2addr(J2GG(as->J)->dispatch); mxp += 4;
/* Jump to exit handler which fills in the ExitState. */
*mxp++ = XI_JMP; mxp += 4;
*((int32_t *)(mxp-4)) = (int32_t)((MCode *)lj_vm_exit_handler - mxp);
@@ -3066,7 +3066,7 @@ static void asm_tail_sync(ASMState *as)
if (as->T->link == TRACE_INTERP) {
/* Setup fixed registers for exit to interpreter. */
emit_loada(as, RID_DISPATCH, GG2DISP(J2GG(as->J)));
emit_loada(as, RID_DISPATCH, J2GG(as->J)->dispatch);
emit_loadi(as, RID_PC, (int32_t)map[nent]);
} else if (newbase) {
/* Save modified BASE for linking to trace with higher start frame. */