hppa: Add initial jit_va_ calls to hppa

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

ChangeLog

@@ -1,3 +1,8 @@
+2015-06-19 Paulo Andrade <pcpa@gnu.org>
+
+	* lib/jit_hppa-cpu.c, lib/jit_hppa-fpu.c, lib/jit_hppa.c:
+	Add base support to jit vararg functions to the hppa backend.
+
 2015-06-10 Paulo Andrade <pcpa@gnu.org>
 
 	* lib/jit_ia64-cpu.c, lib/jit_ia64-fpu.c, lib/jit_ia64.c:

lib/jit_hppa-cpu.c

@@ -802,6 +802,7 @@ static void _ldi_us(jit_state_t*,jit_int32_t,jit_word_t);
 #define ldxr_us(r0,r1,r2)	LDH(r2,r1,r0)
 #define ldxi_us(r0,r1,i0)	_ldxi_us(_jit,r0,r1,i0)
 static void _ldxi_us(jit_state_t*,jit_int32_t,jit_int32_t,jit_word_t);
+#define ldr(r0,r1)		ldr_ui(r0,r1)
 #define ldr_i(r0,r1)		ldr_ui(r0,r1)
 #define ldr_ui(r0,r1)		LDWI(_R0_REGNO,r1,r0)
 #define ldi_i(r0,i0)		ldi_ui(r0,i0)
@@ -919,6 +920,10 @@ 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(i,l)		_patch_at(_jit,i,l)
 static void _patch_at(jit_state_t*,jit_word_t,jit_word_t);
 #endif
@@ -1666,10 +1671,14 @@ static void
 _subi(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
     jit_int32_t		reg;
-    reg = jit_get_reg(jit_class_gpr);
+    if (i0 >= -1023 && i0 <= 1024)
-    movi(rn(reg), i0);
+	addi(r0, r1, -i0);
-    subr(r0, r1, rn(reg));
+    else {
-    jit_unget_reg(reg);
+	reg = jit_get_reg(jit_class_gpr);
+	movi(rn(reg), i0);
+	subr(r0, r1, rn(reg));
+	jit_unget_reg(reg);
+    }
 }
 
 static void
@@ -2688,6 +2697,11 @@ _prolog(jit_state_t *_jit, jit_node_t *node)
 	stxi_i(_jitc->function->aoffoff, _FP_REGNO, rn(regno));
 	jit_unget_reg(regno);
     }
+
+    if (_jitc->function->self.call & jit_call_varargs) {
+	for (regno = 3; regno >= _jitc->function->vagp; --regno)
+	    stxi(params_offset - regno * 4 - 4, _FP_REGNO, rn(_R26 - regno));
+    }
 }
 
 static void
@@ -2720,6 +2734,25 @@ _epilog(jit_state_t *_jit, jit_node_t *node)
 #endif
 }
 
+static void
+_vastart(jit_state_t *_jit, jit_int32_t r0)
+{
+    /* Initialize stack pointer to the first stack argument. */
+    addi(r0, _FP_REGNO, params_offset - _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);
+
+    /* Update vararg stack pointer. */
+    subi(r1, r1, 4);
+
+    /* Load argument. */
+    ldr(r0, r1);
+}
+
 static void
 _patch_at(jit_state_t *_jit, jit_word_t instr, jit_word_t label)
 {

lib/jit_hppa-fpu.c

@@ -30,7 +30,8 @@
 #define f39(o,b,x,t)			_f39(_jit,o,b,x,t)
 static void _f39(jit_state_t*,jit_int32_t,jit_int32_t,jit_int32_t,jit_int32_t);
 #define f40(o,b,x,r)			_f40(_jit,o,b,x,r)
-static void _f40(jit_state_t*,jit_int32_t,jit_int32_t,jit_int32_t,jit_int32_t);
+static void _f40(jit_state_t*,jit_int32_t,jit_int32_t,jit_int32_t,jit_int32_t)
+    maybe_unused;
 #define f41(o,b,x,t)			_f41(_jit,o,b,x,t)
 static void _f41(jit_state_t*,jit_int32_t,jit_int32_t,jit_int32_t,jit_int32_t);
 #define f42(o,b,i,r)			_f42(_jit,o,b,i,r)
@@ -486,6 +487,8 @@ static jit_word_t _bcmpi_d(jit_state_t*,jit_word_t,
 #define bunordi_f(i0,r0,i1)		bcmpi_f(FCMP_UNORD,i0,r0,i1)
 #define bunordr_d(i0,r0,r1)		bcmpr_d(FCMP_UNORD,i0,r0,r1)
 #define bunordi_d(i0,r0,i1)		bcmpi_d(FCMP_UNORD,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
@@ -1013,4 +1016,24 @@ _bcmpi_d(jit_state_t *_jit, jit_word_t c,
     jit_unget_reg(reg);
     return (w);
 }
+
+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);
+
+    /* Align pointer if required. */
+    reg = jit_get_reg(jit_class_gpr);
+    andi(rn(reg), r1, 7);
+    subr(r1, r1, rn(reg));
+    jit_unget_reg(reg);
+
+    /* Adjust vararg stack pointer. */
+    subi(r1, r1, 8);
+
+    /* Load argument. */
+    ldr_d(r0, r1);
+}
 #endif

lib/jit_hppa.c

@@ -29,6 +29,11 @@
 #  include "jit_hppa-fpu.c"
 #undef PROTO
 
+/*
+ * Types
+ */
+typedef jit_pointer_t	jit_va_list;
+
 /*
  * Prototypes
  */
@@ -295,6 +300,8 @@ _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;
     }
 }
 
@@ -531,6 +538,7 @@ _jit_pushargr_f(jit_state_t *_jit, jit_int32_t u)
     if (jit_arg_reg_p(_jitc->function->call.argi)) {
 	jit_movr_f(_F4 - _jitc->function->call.argi, u);
 #if !defined(__hpux)
+	/* HP-UX appears to always pass float arguments in gpr registers */
 	if (_jitc->function->call.call & jit_call_varargs)
 #endif
 	{
@@ -553,6 +561,7 @@ _jit_pushargi_f(jit_state_t *_jit, jit_float32_t u)
     if (jit_arg_reg_p(_jitc->function->call.argi)) {
 	jit_movi_f(_F4 - _jitc->function->call.argi, u);
 #if !defined(__hpux)
+	/* HP-UX appears to always pass float arguments in gpr registers */
 	if (_jitc->function->call.call & jit_call_varargs)
 #endif
 	{
@@ -583,6 +592,7 @@ _jit_pushargr_d(jit_state_t *_jit, jit_int32_t u)
     if (jit_arg_reg_p(_jitc->function->call.argi)) {
 	jit_movr_d(_F4 - (_jitc->function->call.argi + 1), u);
 #if !defined(__hpux)
+	/* HP-UX appears to always pass float arguments in gpr registers */
 	if (_jitc->function->call.call & jit_call_varargs)
 #endif
 	{
@@ -615,6 +625,7 @@ _jit_pushargi_d(jit_state_t *_jit, jit_float64_t u)
     if (jit_arg_reg_p(_jitc->function->call.argi)) {
 	jit_movi_d(_F4 - (_jitc->function->call.argi + 1), u);
 #if !defined(__hpux)
+	/* HP-UX appears to always pass float arguments in gpr registers */
 	if (_jitc->function->call.call & jit_call_varargs)
 #endif
 	{
@@ -1251,9 +1262,19 @@ _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();