arm has a modulo_shift of 256

include/libfirm/be.h

@@ -112,7 +112,7 @@ typedef struct backend_params {
 	 * the shift value are read resulting in a modulo shift value of 32.
 	 * On an architecture without modulo_shift this value is 0.
 	 */
-	unsigned char modulo_shift;
+	unsigned modulo_shift;
 
 	/** Settings for architecture dependent optimizations. */
 	const ir_settings_arch_dep_t *dep_param;

ir/be/arm/arm_transform.c

@@ -784,8 +784,8 @@ static ir_node *make_shift(ir_node *node, match_flags_t flags,
 	ir_node  *op2   = get_binop_right(node);
 	dbg_info *dbgi  = get_irn_dbg_info(node);
 	ir_mode  *mode  = get_irn_mode(node);
-	if (get_mode_modulo_shift(mode) != 32)
-		panic("modulo shift!=32 not supported");
+	if (get_mode_modulo_shift(mode) != 256)
+		panic("modulo shift!=256 not supported");
 
 	if (flags & MATCH_SIZE_NEUTRAL) {
 		op1 = arm_skip_downconv(op1);

ir/be/arm/bearch_arm.c

@@ -47,6 +47,8 @@
 #include "arm_optimize.h"
 #include "arm_emitter.h"
 
+static const backend_params *arm_get_libfirm_params(void);
+
 static ir_entity *arm_get_frame_entity(const ir_node *irn)
 {
 	const arm_attr_t *attr = get_arm_attr_const(irn);
@@ -186,8 +188,14 @@ static void arm_create_runtime_entities(void)
 	if (divsi3 != NULL)
 		return;
 
-	ir_type *int_tp  = get_type_for_mode(mode_Is);
-	ir_type *uint_tp = get_type_for_mode(mode_Iu);
+	unsigned modulo_shift = arm_get_libfirm_params()->modulo_shift;
+	ir_mode *mode_int = new_int_mode("arm_be_int", irma_twos_complement, 32,
+	                                 true, modulo_shift);
+	ir_mode *mode_uint = new_int_mode("arm_be_int", irma_twos_complement, 32,
+	                                  false, modulo_shift);
+
+	ir_type *int_tp  = get_type_for_mode(mode_int);
+	ir_type *uint_tp = get_type_for_mode(mode_uint);
 
 	ir_type *tp_divsi3 = new_type_method(2, 1);
 	set_method_param_type(tp_divsi3, 0, int_tp);
@@ -331,7 +339,7 @@ static const backend_params *arm_get_libfirm_params(void)
 		true,  /* big endian */
 		false, /* PIC code not supported */
 		false, /* unaligned memory access */
-		32,    /* modulo shift */
+		256,   /* modulo shift */
 		&ad,   /* will be set later */
 		arm_is_mux_allowed, /* allow_ifconv function */
 		32,    /* machine size */

ir/ir/irtypes.h

@@ -153,7 +153,7 @@ struct ir_mode {
 	bool               sign:1;        /**< signedness of this mode */
 	ENUMBF(float_int_conversion_overflow_style_t)
 	                   int_conv_overflow:1;
-	unsigned char      modulo_shift;  /**< number of bits a values of this mode will be shifted */
+	unsigned           modulo_shift;  /**< number of bits a values of this mode will be shifted */
 	float_descriptor_t float_desc;
 
 	/* ---------------------------------------------------------------------- */