implement JIT_OP_MEMMOVE

ChangeLog

@@ -1,3 +1,8 @@
+2005-12-28  Aleksey Demakov  <ademakov@gmail.com>
+
+	* jit/jit-rules-x86.sel: implement JIT_OP_MEMMOVE rule. Get rid of
+	compiler warnings in JIT_OP_MEMSET.
+
 2005-12-24  Avinash Atreya  <avinashatreya@gmail.com>
 
 	* dpas/dpas-parser.y: implement array expressions (committed by Aleksey

jit/jit-rules-x86.sel

@@ -3146,8 +3146,37 @@ JIT_OP_MEMCPY: manual
 
 JIT_OP_MEMMOVE: manual
 	[] -> {
-		/* TODO */
-		TODO();
+		unsigned char *inst;
+		int reg, reg2, reg3;
+
+		reg = _jit_regs_load_value
+			(gen, insn->dest, 0,
+			 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
+		reg2 = _jit_regs_load_value
+			(gen, insn->value1, 0,
+			 (insn->flags & (JIT_INSN_VALUE1_NEXT_USE | JIT_INSN_VALUE1_LIVE)));
+		reg3 = _jit_regs_load_value
+			(gen, insn->value2, 0,
+			 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));
+
+		/* A function call may destroy EAX,EBX,ECX,EDX registers. */
+		/* TODO: do not spill ESI and EDI. */
+		_jit_regs_spill_all(gen);
+
+		inst = gen->posn.ptr;
+		if(!jit_cache_check_for_n(&(gen->posn), 32))
+		{
+			jit_cache_mark_full(&(gen->posn));
+			return;
+		}
+
+		x86_push_reg(inst, _jit_reg_info[reg3].cpu_reg);
+		x86_push_reg(inst, _jit_reg_info[reg2].cpu_reg);
+		x86_push_reg(inst, _jit_reg_info[reg].cpu_reg);
+		x86_call_code(inst, jit_memmove);
+		x86_alu_reg_imm(inst, X86_ADD, X86_ESP, 3 * sizeof(void *));
+
+		gen->posn.ptr = inst;
 	}
 
 JIT_OP_MEMSET: manual
@@ -3162,12 +3191,14 @@ JIT_OP_MEMSET: manual
 		}
 		else if(insn->value2->is_constant && insn->value2->address <= 32)
 		{
-			save_reg3 = 0;
-
 			reg = _jit_regs_load_value
 				(gen, insn->dest, 0,
 				 (insn->flags & (JIT_INSN_DEST_NEXT_USE | JIT_INSN_DEST_LIVE)));
 
+			reg2 = -1;
+			reg3 = -1;
+			save_reg3 = 0;
+
 			if(insn->value1->is_constant)
 			{
 				inst = gen->posn.ptr;
@@ -3309,6 +3340,9 @@ JIT_OP_MEMSET: manual
 			reg3 = _jit_regs_load_value
 				(gen, insn->value2, 0,
 				 (insn->flags & (JIT_INSN_VALUE2_NEXT_USE | JIT_INSN_VALUE2_LIVE)));
+
+			/* A function call may destroy EAX,EBX,ECX,EDX registers. */
+			/* TODO: do not spill ESI and EDI. */
 			_jit_regs_spill_all(gen);
 
 			inst = gen->posn.ptr;