Add functional hppa port. All tests pass.

* include/lightning/jit_hppa.h, lib/jit_hppa-cpu.c,
	lib/jit_hppa-fpu.c, lib/jit_hppa.c: New files implementing
	the hppa port. Built on Debian Linux PA-RISC 2.0, 32 bit.

	* check/float.tst: Add preprocessor for hppa expected
	values when converting NaN and +-Inf to an integer.

	* check/ldst.inc: Ensure double load/store tests use an
	8 byte aligned address by default.

	* lib/lightning.c: Correct a bug found during tests in
	the new port, where qmul* and qdiv* were not properly
	setting one of the result registers as modified in the
	function, what would be a problem if the only "write"
	usage were the qmul* or qdiv*.

	* check/varargs.tst, check/varargs.ok: Add one extra
	interleaved integer/double test to validate proper code
	generation in the extra case.

	* check/lightning.c, configure.ac, include/lightning.h,
	include/lightning/Makefile.am,
	include/lightning/jit_private.h, lib/Makefile.am,
	lib/jit_disasm.c: Update for the hppa port.

include/lightning/Makefile.am

@@ -41,3 +41,7 @@ if cpu_ia64
 lightning_include_HEADERS = 	\
 	jit_ia64.h
 endif
+if cpu_hppa
+lightning_include_HEADERS = 	\
+	jit_hppa.h
+endif

include/lightning/jit_hppa.h

@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2013  Free Software Foundation, Inc.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Authors:
+ *	Paulo Cesar Pereira de Andrade
+ */
+
+#ifndef _jit_hppa_h
+#define _jit_hppa_h
+
+#define JIT_HASH_CONSTS		1
+#define JIT_NUM_OPERANDS	3
+
+/*
+ * Types
+ */
+typedef enum {
+#define jit_arg_reg_p(i)	(i >= 0 && i <= 4)
+#define jit_arg_f_reg_p(i)	(i >= 0 && i <= 4)
+    _R0,			/* Always zero */
+    _R1,			/* ADDIL implicit target */
+    _R2,			/* B,L implicit target */
+#define jit_r_num()		4
+#define jit_r(n)		((n) < 4 ? _R4 + (n) : _R10 + (n))
+#define jit_v_num()		4
+#define jit_v(n)		((n) < 4 ? _R7 + (n) : _R11 + (n))
+#define jit_f_num()		8
+#define jit_f(n)		(_F12 - (n))
+#define JIT_FP			_R3
+#define JIT_R0			_R4
+#define JIT_R1			_R5
+#define JIT_R2			_R6
+#define JIT_V0			_R7
+#define JIT_V1			_R8
+#define JIT_V2			_R9
+    _R3,
+    _R19,
+    _R20,
+    _R21,
+    _R22,
+    _R29,			/* ret1 */
+    _R28,			/* ret0 */
+    _R4,
+    _R5,
+    _R6,
+    _R7,
+    _R8,
+    _R9,
+    _R10,
+    _R11,
+    _R12,
+    _R13,
+    _R14,
+    _R15,
+    _R16,
+    _R17,
+    _R18,
+    _R23,			/* arg3 */
+    _R24,			/* arg2 */
+    _R25,			/* arg1 */
+    _R26,			/* arg0 */
+    _R27,			/* Data Pointer */
+    _R30,			/* Stack Pointer */
+    _R31,			/* Link register */
+#define JIT_F0			_F12
+#define JIT_F1			_F13
+#define JIT_F2			_F14
+#define JIT_F3			_F15
+#define JIT_F4			_F16
+#define JIT_F5			_F17
+    /* Caller Saves */
+    _F31,
+    _F30,
+    _F29,
+    _F28,
+    _F27,
+    _F26,
+    _F25,
+    _F24,
+    _F23,
+    _F22,
+    _F11,
+    _F10,
+    _F9,
+    _F8,
+    /* Arguments */
+    _F7,			/* farg3 */
+    _F6,			/* farg2 */
+    _F5,			/* farg1 */
+    _F4,			/* farg0 */
+    /* Callee Saves */
+    _F21,
+    _F20,
+    _F19,
+    _F18,
+    _F17,
+    _F16,
+    _F15,
+    _F14,
+    _F13,
+    _F12,
+    /* Floating-Pointer Status and Exception */
+    _F0,
+    _F1,
+    _F2,
+    _F3,
+#define JIT_NOREG		_NOREG
+    _NOREG,
+} jit_reg_t;
+
+typedef jit_int64_t		jit_regset_t;
+
+#endif /* _jit_hppa */

include/lightning/jit_private.h

@@ -77,6 +77,10 @@
 #  define JIT_SP		_R12
 #  define JIT_RET		_R8
 #  define JIT_FRET		_F8
+#elif defined(__hppa__)
+#  define JIT_SP		_R30
+#  define JIT_RET		_R28
+#  define JIT_FRET		_F4
 #endif
 
 #define jit_size(vector)	(sizeof(vector) / sizeof((vector)[0]))