ia64: Add initial jit_va_ calls to ia64

* lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c, lib/jit_ia64.c:
	Add base support to jit vararg functions to the ia64 backend.

ChangeLog

@@ -1,3 +1,8 @@
+2015-06-10 Paulo Andrade <pcpa@gnu.org>
+
+	* lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c, lib/jit_ia64.c:
+	Add base support to jit vararg functions to the ia64 backend.
+
 2015-06-10 Paulo Andrade <pcpa@gnu.org>
 
 	* lib/jit_ia64-fpu.c, lib/jit_ia64.c: Correct movi_d_w

lib/jit_ia64-cpu.c

@@ -18,7 +18,7 @@
  */
 
 #if PROTO
-#define stack_framesize			96
+#define stack_framesize			144
 #define params_offset			16
 #define INST_NONE			0	/* should never be generated */
 #define INST_STOP			1	/* or'ed if stop is required */
@@ -1508,6 +1508,10 @@ static jit_word_t _calli_p(jit_state_t*,jit_word_t);
 static void _prolog(jit_state_t*,jit_node_t*);
 #define epilog(node)			_epilog(_jit,node)
 static void _epilog(jit_state_t*,jit_node_t*);
+#  define vastart(r0)			_vastart(_jit, r0)
+static void _vastart(jit_state_t*, jit_int32_t);
+#  define vaarg(r0, r1)			_vaarg(_jit, r0, r1)
+static void _vaarg(jit_state_t*, jit_int32_t, jit_int32_t);
 #define patch_at(node,instr,label)	_patch_at(_jit,node,instr,label)
 static void _patch_at(jit_state_t*,jit_code_t,jit_word_t,jit_word_t);
 #endif
@@ -5262,6 +5266,11 @@ _prolog(jit_state_t *_jit, jit_node_t *node)
 	stxi_i(_jitc->function->aoffoff, GR_4, rn(reg));
 	jit_unget_reg(reg);
     }
+
+    if (_jitc->function->self.call & jit_call_varargs) {
+	for (reg = _jitc->function->vagp; reg < 8; ++reg)
+	    stxi(96 + reg * 8, GR_4, GR_32 + reg);
+    }
 }
 
 static void
@@ -5302,6 +5311,45 @@ _epilog(jit_state_t *_jit, jit_node_t *node)
     flush();
 }
 
+static void
+_vastart(jit_state_t *_jit, jit_int32_t r0)
+{
+    jit_int32_t		reg;
+
+    assert(_jitc->function->self.call & jit_call_varargs);
+
+    /* Return jit_va_list_t in the register argument */
+    addi(r0, GR_4, _jitc->function->vaoff);
+    reg = jit_get_reg(jit_class_gpr);
+
+    /* Initialize stack pointer to the first stack argument. */
+    addi(rn(reg), GR_4, 96 + _jitc->function->vagp * 8);
+    stxi(offsetof(jit_va_list_t, stack), r0, rn(reg));
+
+    jit_unget_reg(reg);
+}
+
+static void
+_vaarg(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1)
+{
+    jit_int32_t		reg;
+
+    assert(_jitc->function->self.call & jit_call_varargs);
+    reg = jit_get_reg(jit_class_gpr);
+
+    /* Load varargs stack pointer. */
+    ldxi(rn(reg), r1, offsetof(jit_va_list_t, stack));
+
+    /* Load argument. */
+    ldr(r0, rn(reg));
+
+    /* Update vararg stack pointer. */
+    addi(rn(reg), rn(reg), 8);
+    stxi(offsetof(jit_va_list_t, stack), r1, rn(reg));
+
+    jit_unget_reg(reg);
+}
+
 static void
 _patch_at(jit_state_t *_jit, jit_code_t code,
 	  jit_word_t instr, jit_word_t label)

lib/jit_ia64-fpu.c

@@ -718,6 +718,8 @@ static jit_word_t _bunordr_d(jit_state_t*,jit_word_t,jit_int32_t,jit_int32_t);
 static jit_word_t _bunordi_f(jit_state_t*,jit_word_t,jit_int32_t,jit_float32_t*);
 #define bunordi_d(i0,r0,i1)		_bunordi_d(_jit,i0,r0,i1)
 static jit_word_t _bunordi_d(jit_state_t*,jit_word_t,jit_int32_t,jit_float64_t*);
+#  define vaarg_d(r0, r1)		_vaarg_d(_jit, r0, r1)
+static void _vaarg_d(jit_state_t*, jit_int32_t, jit_int32_t);
 #endif
 
 #if CODE
@@ -1725,4 +1727,25 @@ _bunordr_d(jit_state_t *_jit, jit_word_t i0, jit_int32_t r0, jit_int32_t r1)
 }
 fbopi(unord)
 dbopi(unord)
+
+static void
+_vaarg_d(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1)
+{
+    jit_int32_t		reg;
+
+    assert(_jitc->function->self.call & jit_call_varargs);
+    reg = jit_get_reg(jit_class_gpr);
+
+    /* Load varargs stack pointer. */
+    ldxi(rn(reg), r1, offsetof(jit_va_list_t, stack));
+
+    /* Load argument. */
+    ldr_d(r0, rn(reg));
+
+    /* Update vararg stack pointer. */
+    addi(rn(reg), rn(reg), 8);
+    stxi(offsetof(jit_va_list_t, stack), r1, rn(reg));
+
+    jit_unget_reg(reg);
+}
 #endif

lib/jit_ia64.c

@@ -35,6 +35,13 @@
 #  define F_DISP			8 - sizeof(jit_float32_t)
 #endif
 
+/*
+ * Types
+ */
+typedef struct jit_va_list {
+    jit_pointer_t	stack;
+} jit_va_list_t;
+
 /*
  * Prototypes
  */
@@ -402,6 +409,11 @@ _jit_ellipsis(jit_state_t *_jit)
     else {
 	assert(!(_jitc->function->self.call & jit_call_varargs));
 	_jitc->function->self.call |= jit_call_varargs;
+
+	/* Allocate va_list like object in the stack. */
+	_jitc->function->vaoff = jit_allocai(sizeof(jit_va_list_t));
+
+	_jitc->function->vagp = _jitc->function->self.argi;
     }
 }
 
@@ -1409,9 +1421,19 @@ _emit_code(jit_state_t *_jit)
 		_jitc->pred = 0;
 		_jitc->function = NULL;
 		break;
+	    case jit_code_va_start:
+		vastart(rn(node->u.w));
+		break;
+	    case jit_code_va_arg:
+		vaarg(rn(node->u.w), rn(node->v.w));
+		break;
+	    case jit_code_va_arg_d:
+		vaarg_d(rn(node->u.w), rn(node->v.w));
+		break;
 	    case jit_code_live:
 	    case jit_code_arg:
 	    case jit_code_arg_f:		case jit_code_arg_d:
+	    case jit_code_va_end:
 		break;
 	    case jit_code_movr_f_w:
 		movr_f_w(rn(node->u.w), rn(node->v.w));