sparc: Add initial jit_va_ calls to sparc

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

ChangeLog

@@ -1,3 +1,8 @@
+2015-06-20 Paulo Andrade <pcpa@gnu.org>
+
+	* lib/jit_sparc-cpu.c, lib/jit_sparc-fpu.c, lib/jit_sparc.c:
+	Add base support to jit vararg functions to the sparc backend.
+
 2015-06-20 Paulo Andrade <pcpa@gnu.org>
 
 	* lib/jit_alpha-cpu.c, lib/jit_alpha-fpu.c, lib/jit_alpha.c:

lib/jit_sparc-cpu.c

@@ -673,6 +673,10 @@ 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(jump, label)		_patch_at(_jit, jump, label)
 static void _patch_at(jit_state_t*,jit_word_t,jit_word_t);
 #endif
@@ -1672,6 +1676,11 @@ _prolog(jit_state_t *_jit, jit_node_t *node)
 	stxi_i(_jitc->function->aoffoff, _FP_REGNO, rn(reg));
 	jit_unget_reg(reg);
     }
+
+    if (_jitc->function->self.call & jit_call_varargs) {
+	for (reg = _jitc->function->vagp; jit_arg_reg_p(reg); ++reg)
+	    stxi(68 + reg * 4, _SP_REGNO, rn(_I0 + reg));
+    }
 }
 
 static void
@@ -1702,6 +1711,25 @@ _epilog(jit_state_t *_jit, jit_node_t *node)
     NOP();
 }
 
+static void
+_vastart(jit_state_t *_jit, jit_int32_t r0)
+{
+    /* Initialize stack pointer to the first stack argument. */
+    addi(r0, _SP_REGNO, 68 + _jitc->function->vagp * 4);
+}
+
+static void
+_vaarg(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1)
+{
+    assert(_jitc->function->self.call & jit_call_varargs);
+
+    /* Load argument. */
+    ldr(r0, r1);
+
+    /* Update vararg stack pointer. */
+    addi(r1, r1, 4);
+}
+
 static void
 _patch_at(jit_state_t *_jit, jit_word_t instr, jit_word_t label)
 {

lib/jit_sparc-fpu.c

@@ -362,6 +362,8 @@ _dbw(jit_state_t*,jit_int32_t,jit_word_t,jit_int32_t,jit_float64_t*);
 #  define bordi_d(i0, r0, i1)		dbw(SPARC_FBO, i0, r0, i1)
 #  define bunordr_d(i0, r0, r1)		dbr(SPARC_FBU, i0, r0, r1)
 #  define bunordi_d(i0, r0, i1)		dbw(SPARC_FBU, i0, r0, i1)
+#  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
@@ -757,4 +759,16 @@ _dbw(jit_state_t *_jit, jit_int32_t cc,
     NOP();
     return (w);
 }
+
+static void
+_vaarg_d(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1)
+{
+    assert(_jitc->function->self.call & jit_call_varargs);
+
+    /* Load argument. */
+    ldr_d(r0, r1);
+
+    /* Update vararg stack pointer. */
+    addi(r1, r1, 8);
+}
 #endif

lib/jit_sparc.c

@@ -22,6 +22,11 @@
 #define jit_arg_reg_p(i)		((i) >= 0 && (i) < 6)
 #define jit_arg_d_reg_p(i)		((i) >= 0 && (i) < 5)
 
+/*
+ * Types
+ */
+typedef jit_pointer_t	jit_va_list_t;
+
 /*
  * Prototypes
  */
@@ -268,6 +273,8 @@ _jit_ellipsis(jit_state_t *_jit)
     else {
 	assert(!(_jitc->function->self.call & jit_call_varargs));
 	_jitc->function->self.call |= jit_call_varargs;
+
+	_jitc->function->vagp = _jitc->function->self.argi;
     }
 }
 
@@ -1274,9 +1281,19 @@ _emit_code(jit_state_t *_jit)
 		epilog(node);
 		_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;
 	    default:
 		abort();