void
_jit_putargi_d(jit_state_t *_jit, jit_float64_t u, jit_node_t *v)
{
jit_int32_t regno, gpr;
assert(v->code == jit_code_arg_d);
regno = jit_get_reg(jit_class_fpr);
jit_movi_d(regno, u);
if (jit_arg_d_reg_p(v->u.w)) {
jit_stxi_d(-8, JIT_FP, regno);
jit_ldxi(_I0 + v->u.w, JIT_FP, -8);
jit_ldxi(_I0 + v->u.w + 1, JIT_FP, -4);
}
else if (jit_arg_reg_p(v->u.w)) {
gpr = jit_get_reg(jit_class_gpr);
jit_stxi_d(-8, JIT_FP, regno);
jit_ldxi(_I0 + v->u.w, JIT_FP, -8);
jit_ldxi(gpr, JIT_FP, -4);
jit_stxi(stack_framesize, JIT_FP, gpr);
jit_unget_reg(gpr);
}
else if ((v->u.w & 7) == 0)
jit_stxi_d(v->u.w, JIT_FP, regno);
else {
jit_stxi_d(-8, JIT_FP, regno);
gpr = jit_get_reg(jit_class_gpr);
jit_ldxi(gpr, JIT_FP, -8);
jit_stxi(v->u.w, JIT_FP, gpr);
jit_ldxi(gpr, JIT_FP, -4);
jit_stxi(v->u.w + 4, JIT_FP, gpr);
jit_unget_reg(gpr);
}
jit_unget_reg(regno);
}
void
_jit_pushargi_d(jit_state_t *_jit, jit_float64_t u)
{
jit_int32_t regno;
regno = jit_get_reg(jit_class_fpr);
jit_movi_d(regno, u);
if (jit_arg_d_reg_p(_jitc->function->call.argi)) {
jit_stxi_d(-8, JIT_FP, regno);
jit_ldxi(_O0 + _jitc->function->call.argi, JIT_FP, -8);
jit_ldxi(_O0 + _jitc->function->call.argi + 1, JIT_FP, -4);
_jitc->function->call.argi += 2;
}
else if (jit_arg_reg_p(_jitc->function->call.argi)) {
jit_stxi_f(-8, JIT_FP, regno);
jit_ldxi(_O0 + _jitc->function->call.argi, JIT_FP, -8);
++_jitc->function->call.argi;
jit_stxi_f(stack_framesize, JIT_SP, regno + 1);
_jitc->function->call.size += sizeof(jit_float32_t);
}
else {
jit_stxi_f(_jitc->function->call.size + stack_framesize,
JIT_SP, regno);
jit_stxi_f(_jitc->function->call.size + stack_framesize + 4,
JIT_SP, regno + 1);
_jitc->function->call.size += sizeof(jit_float64_t);
}
jit_unget_reg(regno);
}
void
_jit_pushargr_d(jit_state_t *_jit, jit_int32_t u)
{
if (jit_arg_d_reg_p(_jitc->function->call.argi)) {
jit_stxi_d(-8, JIT_FP, u);
jit_ldxi(_O0 + _jitc->function->call.argi, JIT_FP, -8);
jit_ldxi(_O0 + _jitc->function->call.argi + 1, JIT_FP, -4);
_jitc->function->call.argi += 2;
}
else if (jit_arg_reg_p(_jitc->function->call.argi)) {
jit_stxi_f(-8, JIT_FP, u);
jit_ldxi(_O0 + _jitc->function->call.argi, JIT_FP, -8);
++_jitc->function->call.argi;
jit_stxi_f(stack_framesize, JIT_SP, u + 1);
_jitc->function->call.size += sizeof(jit_float32_t);
}
else {
jit_stxi_f(_jitc->function->call.size + stack_framesize,
JIT_SP, u);
jit_stxi_f(_jitc->function->call.size + stack_framesize + 4,
JIT_SP, u + 1);
_jitc->function->call.size += sizeof(jit_float64_t);
}
}
void _JIT_stack_push(jit_state_t *_jit, int reg, int *sp) {
jit_stxi_d(*sp, JIT_FP, reg);
*sp += sizeof(double);
}
bool compile(const Program &program, Translator &trans, Environment &env) {
jit_node_t *ref;
jit_node_t *fn = jit_note(NULL, 0);
jit_prolog();
const int stack_base_offset = jit_allocai(32 * sizeof(double));
int stack_top_idx = 0;
auto &&stackPush = [&](int reg) {
jit_stxi_d(stack_base_offset + stack_top_idx * sizeof(double), JIT_FP, reg);
++stack_top_idx;
};
auto &&stackPop = [&](int reg) {
--stack_top_idx;
jit_ldxi_d(reg, JIT_FP, stack_base_offset + stack_top_idx * sizeof(double));
return reg;
};
size_t pc = 0;
const size_t progsz = program.size();
while (pc < progsz) {
const Instruction &instr = program[pc];
switch (instr.op) {
case OP_NOP:
break;
case OP_PUSH:
stackPush(JIT_F0);
jit_movi_d(JIT_F0, instr.dval);
break;
case OP_ADD: {
const int reg = stackPop(JIT_F1);
jit_addr_d(JIT_F0, reg, JIT_F0);
}
break;
case OP_SUB: {
const int reg = stackPop(JIT_F1);
jit_subr_d(JIT_F0, reg, JIT_F0);
}
break;
case OP_MUL: {
const int reg = stackPop(JIT_F1);
jit_mulr_d(JIT_F0, reg, JIT_F0);
}
break;
case OP_DIV: {
const int reg = stackPop(JIT_F1);
jit_divr_d(JIT_F0, reg, JIT_F0);
}
break;
case OP_CALL: {
stackPush(JIT_F0);
const int sp = stack_top_idx - (instr.callop.nargs);
jit_addi(JIT_R0, JIT_FP, stack_base_offset + sp * sizeof(double));
jit_prepare();
jit_pushargi((jit_word_t)&env); // 1st arg: userdata
jit_pushargi(instr.callop.nargs); // 2nd arg: # of arguments
jit_pushargr(JIT_R0); // 3rd arg: pointer to args on stack
jit_pushargi((jit_word_t)&error_); // 4th arg: pointer to error message
auto &&cb = trans.lookup(instr.callop.fidx);
jit_finishi(reinterpret_cast<jit_pointer_t>(cb));
stack_top_idx -= instr.callop.nargs; // consume arguments on stack
jit_retval_d(JIT_F0);
jit_retval(JIT_R0);
ref = jit_bnei(JIT_R0, 0);
jit_reti_d(*reinterpret_cast<const double*>(&JIT_ERROR));
jit_patch(ref);
}
break;
}
++pc;
}
jit_retr_d(JIT_F0);
jit_epilog();
(void)jit_emit();
func_ = reinterpret_cast<JitFunction>(jit_address(fn));
return true;
}
