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9d09240d9e
The goal is to reduce rb_context_t and rb_fiber_t size by removing the need to store the entire rb_thread_t in there. [ruby-core:81045] Work-in-progress: soon, we will move more fields here. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58614 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
170 lines
3.6 KiB
C
170 lines
3.6 KiB
C
/* -*-c-*- */
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/**********************************************************************
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vm_exec.c -
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$Author$
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Copyright (C) 2004-2007 Koichi Sasada
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**********************************************************************/
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#include <math.h>
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#if VM_COLLECT_USAGE_DETAILS
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static void vm_analysis_insn(int insn);
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#endif
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#if VMDEBUG > 0
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#define DECL_SC_REG(type, r, reg) register type reg_##r
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#elif defined(__GNUC__) && defined(__x86_64__)
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#define DECL_SC_REG(type, r, reg) register type reg_##r __asm__("r" reg)
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#elif defined(__GNUC__) && defined(__i386__)
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#define DECL_SC_REG(type, r, reg) register type reg_##r __asm__("e" reg)
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#elif defined(__GNUC__) && defined(__powerpc64__)
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#define DECL_SC_REG(type, r, reg) register type reg_##r __asm__("r" reg)
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#else
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#define DECL_SC_REG(type, r, reg) register type reg_##r
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#endif
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/* #define DECL_SC_REG(r, reg) VALUE reg_##r */
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#if VM_DEBUG_STACKOVERFLOW
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NORETURN(static void vm_stack_overflow_for_insn(void));
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static void
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vm_stack_overflow_for_insn(void)
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{
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rb_bug("CHECK_VM_STACK_OVERFLOW_FOR_INSN: should not overflow here. "
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"Please contact ruby-core/dev with your (a part of) script. "
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"This check will be removed soon.");
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}
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#endif
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#if !OPT_CALL_THREADED_CODE
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static VALUE
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vm_exec_core(rb_thread_t *th, VALUE initial)
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{
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#if OPT_STACK_CACHING
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#if 0
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#elif __GNUC__ && __x86_64__ && !defined(__native_client__)
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DECL_SC_REG(VALUE, a, "12");
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DECL_SC_REG(VALUE, b, "13");
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#else
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register VALUE reg_a;
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register VALUE reg_b;
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#endif
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#endif
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#if defined(__GNUC__) && defined(__i386__)
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DECL_SC_REG(const VALUE *, pc, "di");
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DECL_SC_REG(rb_control_frame_t *, cfp, "si");
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#define USE_MACHINE_REGS 1
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#elif defined(__GNUC__) && defined(__x86_64__)
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DECL_SC_REG(const VALUE *, pc, "14");
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# if defined(__native_client__)
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DECL_SC_REG(rb_control_frame_t *, cfp, "13");
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# else
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DECL_SC_REG(rb_control_frame_t *, cfp, "15");
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# endif
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#define USE_MACHINE_REGS 1
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#elif defined(__GNUC__) && defined(__powerpc64__)
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DECL_SC_REG(const VALUE *, pc, "14");
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DECL_SC_REG(rb_control_frame_t *, cfp, "15");
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#define USE_MACHINE_REGS 1
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#else
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register rb_control_frame_t *reg_cfp;
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const VALUE *reg_pc;
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#endif
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#if USE_MACHINE_REGS
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#undef RESTORE_REGS
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#define RESTORE_REGS() \
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{ \
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VM_REG_CFP = th->ec.cfp; \
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reg_pc = reg_cfp->pc; \
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}
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#undef VM_REG_PC
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#define VM_REG_PC reg_pc
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#undef GET_PC
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#define GET_PC() (reg_pc)
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#undef SET_PC
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#define SET_PC(x) (reg_cfp->pc = VM_REG_PC = (x))
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#endif
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#if OPT_TOKEN_THREADED_CODE || OPT_DIRECT_THREADED_CODE
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#include "vmtc.inc"
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if (UNLIKELY(th == 0)) {
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return (VALUE)insns_address_table;
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}
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#endif
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reg_cfp = th->ec.cfp;
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reg_pc = reg_cfp->pc;
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#if OPT_STACK_CACHING
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reg_a = initial;
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reg_b = 0;
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#endif
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first:
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INSN_DISPATCH();
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/*****************/
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#include "vm.inc"
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/*****************/
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END_INSNS_DISPATCH();
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/* unreachable */
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rb_bug("vm_eval: unreachable");
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goto first;
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}
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const void **
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rb_vm_get_insns_address_table(void)
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{
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return (const void **)vm_exec_core(0, 0);
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}
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#else /* OPT_CALL_THREADED_CODE */
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#include "vm.inc"
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#include "vmtc.inc"
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const void **
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rb_vm_get_insns_address_table(void)
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{
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return (const void **)insns_address_table;
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}
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static VALUE
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vm_exec_core(rb_thread_t *th, VALUE initial)
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{
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register rb_control_frame_t *reg_cfp = th->ec.cfp;
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while (1) {
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reg_cfp = ((rb_insn_func_t) (*GET_PC()))(th, reg_cfp);
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if (UNLIKELY(reg_cfp == 0)) {
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break;
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}
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}
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if (th->retval != Qundef) {
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VALUE ret = th->retval;
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th->retval = Qundef;
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return ret;
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}
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else {
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VALUE err = th->errinfo;
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th->errinfo = Qnil;
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return err;
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}
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}
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#endif
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