expmed.c (extract_bit_field): Ensure BITS_PER_WORD is signed in MAX.

	* expmed.c (extract_bit_field): Ensure BITS_PER_WORD is signed in MAX.
	* config/arm/pe.c (arm_pe_return_in_memory): Use host_integerp and
	int_bit_position.
	* config/mips/mips.c (function_arg): Likewise; also remove cast
	and make variables unsigned or HOST_WIDE_INT and use tree_low_cst.
	(mips_function_value): Use int_byte_position and make HOST_WIDE_INT.
	* config/mips/abi64.h (SETUP_INCOMING_VARARGS): Offsets are unsigned.
	* config/mips/mips.h (BITS_PER_WORD, UNITS_PER_WORD): Cast to unsigned.
	(UNITS_PER_FPREG, INT_TYPE_SIZE, LONG_TYPE_SIZE): Likewise.
	(POINTER_SIZE, POINTER_BOUNDARY,PARM_BOUNDARY): Likewise.
	(GP_REG_P, FP_REG_P, MD_REG_P, ST_REG_P): Ensure subtraction signed.
	(struct mips_arg): arg_number, arg_words, fp_arg_words, and
	num_adjusts now unsigned.
	(FUNCTION_ARG_BOUNDARY): Remove unneeded cast.
	* config/sparc/sparc.c (struct function_arg_record_value_parms):
	NREGS now unsigned.
	(function_arg_record_value_1): STARTBITPOS arg now HOST_WIDE_INT
	as is BITPOS variable; use host_integerp and int_bit_position.
	(function_arg_record_value_2): Likewise.
	(function_arg_record_value_3): Arg BITPOS now HOST_WIDE_INT.
	Variable REGNO now unsigned.
	(function_arg_record_value): NREGS now unsigned.

From-SVN: r32748

7 files changed, 108 insertions, 74 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b767df4..e7331e7b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,7 +1,33 @@
+Sun Mar 26 11:37:55 2000  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+
+	* expmed.c (extract_bit_field): Ensure BITS_PER_WORD is signed in MAX.
+	* config/arm/pe.c (arm_pe_return_in_memory): Use host_integerp and
+	int_bit_position.
+	* config/mips/mips.c (function_arg): Likewise; also remove cast
+	and make variables unsigned or HOST_WIDE_INT and use tree_low_cst.
+	(mips_function_value): Use int_byte_position and make HOST_WIDE_INT.
+	* config/mips/abi64.h (SETUP_INCOMING_VARARGS): Offsets are unsigned.
+	* config/mips/mips.h (BITS_PER_WORD, UNITS_PER_WORD): Cast to unsigned.
+	(UNITS_PER_FPREG, INT_TYPE_SIZE, LONG_TYPE_SIZE): Likewise.
+	(POINTER_SIZE, POINTER_BOUNDARY,PARM_BOUNDARY): Likewise.
+	(GP_REG_P, FP_REG_P, MD_REG_P, ST_REG_P): Ensure subtraction signed.
+	(struct mips_arg): arg_number, arg_words, fp_arg_words, and
+	num_adjusts now unsigned.
+	(FUNCTION_ARG_BOUNDARY): Remove unneeded cast.
+	* config/sparc/sparc.c (struct function_arg_record_value_parms):
+	NREGS now unsigned.
+	(function_arg_record_value_1): STARTBITPOS arg now HOST_WIDE_INT
+	as is BITPOS variable; use host_integerp and int_bit_position.
+	(function_arg_record_value_2): Likewise.
+	(function_arg_record_value_3): Arg BITPOS now HOST_WIDE_INT.
+	Variable REGNO now unsigned.
+	(function_arg_record_value): NREGS now unsigned.
+
 2000-03-26  Bernd Schmidt  <bernds@cygnus.co.uk>
 
 	* jump.c (mark_all_labels): Handle CALL_PLACEHOLDERs.
 
+
 Sat Mar 25 09:12:10 2000  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* Rework fields used to describe positions of bitfields and
diff --git a/gcc/config/arm/pe.c b/gcc/config/arm/pe.c
index bb01fd2..80fdd04 100644
--- a/gcc/config/arm/pe.c
+++ b/gcc/config/arm/pe.c
@@ -474,8 +474,10 @@ arm_pe_return_in_memory (type)
 	  if (TREE_CODE (field) == FIELD_DECL
 	      && ! TREE_STATIC (field)
 	      && (! DECL_BIT_FIELD_TYPE (field)
-		  || (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field))
-		      + TREE_INT_CST_LOW (DECL_SIZE (field))) > 32))
+		  || (host_integerp (DECL_SIZE (field), 1)
+		      && host_integerp (bit_position (field), 1)
+		      && 32 < (int_bit_position (field)
+			       + tree_low_cst (DECL_SIZE (field), 1)))))
 	    return 1;
 	}
       return 0;
diff --git a/gcc/config/mips/abi64.h b/gcc/config/mips/abi64.h
index e74e2f4..a883346 100644
--- a/gcc/config/mips/abi64.h
+++ b/gcc/config/mips/abi64.h
@@ -105,19 +105,21 @@ extern struct rtx_def *mips_function_value PARAMS ((union tree_node *, union tre
    For stdarg, we do not need to save the current argument, because it
    is a real argument.  */
 #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL)	\
-{ int mips_off = (! current_function_varargs) && (! (CUM).last_arg_fp);	\
-  int mips_fp_off = (! current_function_varargs) && ((CUM).last_arg_fp); \
+{ unsigned int mips_off							\
+    = (! current_function_varargs) && (! (CUM).last_arg_fp);		\
+    unsigned int mips_fp_off						\
+    = (! current_function_varargs) && ((CUM).last_arg_fp); 		\
   if (((mips_abi != ABI_32 && mips_abi != ABI_O64)			\
        && (CUM).arg_words < MAX_ARGS_IN_REGISTERS - mips_off)		\
       || (mips_abi == ABI_EABI						\
 	  && ! TARGET_SOFT_FLOAT					\
 	  && (CUM).fp_arg_words < MAX_ARGS_IN_REGISTERS - mips_fp_off))	\
     {									\
-      int mips_save_gp_regs =						\
-        MAX_ARGS_IN_REGISTERS - (CUM).arg_words - mips_off;		\
-      int mips_save_fp_regs =						\
-        (mips_abi != ABI_EABI ? 0					\
-	 : MAX_ARGS_IN_REGISTERS - (CUM).fp_arg_words - mips_fp_off);	\
+      int mips_save_gp_regs						\
+        = MAX_ARGS_IN_REGISTERS - (CUM).arg_words - mips_off;		\
+      int mips_save_fp_regs						\
+        = (mips_abi != ABI_EABI ? 0					\
+	   : MAX_ARGS_IN_REGISTERS - (CUM).fp_arg_words - mips_fp_off);	\
 									\
       if (mips_save_gp_regs < 0)					\
 	mips_save_gp_regs = 0;						\
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index dedbe05..95f7f23 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -3801,7 +3801,7 @@ function_arg (cum, mode, type, named)
 
       /* Drops through.  */
     case BLKmode:
-      if (type != (tree)0 && TYPE_ALIGN (type) > (unsigned) BITS_PER_WORD
+      if (type != NULL_TREE && TYPE_ALIGN (type) > BITS_PER_WORD
 	  && ! TARGET_64BIT && mips_abi != ABI_EABI)
 	cum->arg_words += (cum->arg_words & 1);
       regbase = GP_ARG_FIRST;
@@ -3833,7 +3833,8 @@ function_arg (cum, mode, type, named)
 	abort ();
 
       if (! type || TREE_CODE (type) != RECORD_TYPE || mips_abi == ABI_32
-	  || mips_abi == ABI_EABI || mips_abi == ABI_O64 || ! named)
+	  || mips_abi == ABI_EABI || mips_abi == ABI_O64 || ! named
+	  || ! host_integerp (TYPE_SIZE_UNIT (type), 1))
 	ret = gen_rtx_REG (mode, regbase + *arg_words + bias);
       else
 	{
@@ -3847,8 +3848,8 @@ function_arg (cum, mode, type, named)
 	    if (TREE_CODE (field) == FIELD_DECL
 		&& TREE_CODE (TREE_TYPE (field)) == REAL_TYPE
 		&& TYPE_PRECISION (TREE_TYPE (field)) == BITS_PER_WORD
-		&& (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field))
-		    % BITS_PER_WORD == 0))
+		&& host_integerp (bit_position (field), 0)
+		&& int_bit_position (field) % BITS_PER_WORD == 0)
 	      break;
 
 	  /* If the whole struct fits a DFmode register,
@@ -3859,15 +3860,16 @@ function_arg (cum, mode, type, named)
 	    {
 	      /* Now handle the special case by returning a PARALLEL
 		 indicating where each 64 bit chunk goes.  */
-	      int chunks;
-	      int bitpos;
-	      int regno;
+	      unsigned int chunks;
+	      HOST_WIDE_INT bitpos;
+	      unsigned int regno;
 	      int i;
 
 	      /* ??? If this is a packed structure, then the last hunk won't
 		 be 64 bits.  */
 
-	      chunks = TREE_INT_CST_LOW (TYPE_SIZE (type)) / BITS_PER_WORD;
+	      chunks
+		= tree_low_cst (TYPE_SIZE_UNIT (type), 1) / UNITS_PER_WORD;
 	      if (chunks + *arg_words + bias > MAX_ARGS_IN_REGISTERS)
 		chunks = MAX_ARGS_IN_REGISTERS - *arg_words - bias;
 
@@ -3884,12 +3886,11 @@ function_arg (cum, mode, type, named)
 
 		  for (; field; field = TREE_CHAIN (field))
 		    if (TREE_CODE (field) == FIELD_DECL
-			&& (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field))
-			    >= bitpos))
+			&& int_bit_position (field) >= bitpos)
 		      break;
 
 		  if (field
-		      && TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field)) == bitpos
+		      && int_bit_position (field) == bitpos
 		      && TREE_CODE (TREE_TYPE (field)) == REAL_TYPE
 		      && TYPE_PRECISION (TREE_TYPE (field)) == BITS_PER_WORD)
 		    reg = gen_rtx_REG (DFmode,
@@ -7417,10 +7418,8 @@ mips_function_value (valtype, func)
 		= TYPE_MODE (TREE_TYPE (fields[0]));
 	      enum machine_mode second_mode
 		= TYPE_MODE (TREE_TYPE (fields[1]));
-	      int first_offset
-		= TREE_INT_CST_LOW (DECL_FIELD_BITPOS (fields[0]));
-	      int second_offset
-		= TREE_INT_CST_LOW (DECL_FIELD_BITPOS (fields[1]));
+	      HOST_WIDE_INT first_offset = int_byte_position (fields[0]);
+	      HOST_WIDE_INT second_offset = int_byte_position (fields[1]);
 
 	      return gen_rtx_PARALLEL
 		(mode,
@@ -7428,13 +7427,11 @@ mips_function_value (valtype, func)
 			    gen_rtx_EXPR_LIST (VOIDmode,
 					       gen_rtx_REG (first_mode,
 							    FP_RETURN),
-					       GEN_INT (first_offset
-							/ BITS_PER_UNIT)),
+					       GEN_INT (first_offset)),
 			    gen_rtx_EXPR_LIST (VOIDmode,
 					       gen_rtx_REG (second_mode,
 							    FP_RETURN + 2),
-					       GEN_INT (second_offset
-							/ BITS_PER_UNIT))));
+					       GEN_INT (second_offset))));
 	    }
 	}
     }
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 9369f45..5e7039d 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -1295,20 +1295,20 @@ do {							\
    Note that this is not necessarily the width of data type `int';
    if using 16-bit ints on a 68000, this would still be 32.
    But on a machine with 16-bit registers, this would be 16.  */
-#define BITS_PER_WORD (TARGET_64BIT ? 64 : 32)
+#define BITS_PER_WORD ((unsigned int) (TARGET_64BIT ? 64 : 32))
 #define MAX_BITS_PER_WORD 64
 
 /* Width of a word, in units (bytes).  */
-#define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
+#define UNITS_PER_WORD ((unsigned int) (TARGET_64BIT ? 8 : 4))
 #define MIN_UNITS_PER_WORD 4
 
 /* For MIPS, width of a floating point register.  */
-#define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
+#define UNITS_PER_FPREG ((unsigned int) (TARGET_FLOAT64 ? 8 : 4))
 
 /* A C expression for the size in bits of the type `int' on the
    target machine.  If you don't define this, the default is one
    word.  */
-#define INT_TYPE_SIZE (TARGET_INT64 ? 64 : 32)
+#define INT_TYPE_SIZE ((unsigned int) (TARGET_INT64 ? 64 : 32))
 #define MAX_INT_TYPE_SIZE 64
 
 /* Tell the preprocessor the maximum size of wchar_t.  */
@@ -1327,7 +1327,7 @@ do {							\
 /* A C expression for the size in bits of the type `long' on the
    target machine.  If you don't define this, the default is one
    word.  */
-#define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
+#define LONG_TYPE_SIZE ((unsigned int) (TARGET_LONG64 ? 64 : 32))
 #define MAX_LONG_TYPE_SIZE 64
 
 /* A C expression for the size in bits of the type `long long' on the
@@ -1359,14 +1359,14 @@ do {							\
 /* Width in bits of a pointer.
    See also the macro `Pmode' defined below.  */
 #ifndef POINTER_SIZE
-#define POINTER_SIZE (Pmode == DImode ? 64 : 32)
+#define POINTER_SIZE ((unsigned int) (Pmode == DImode ? 64 : 32))
 #endif
 
 /* Allocation boundary (in *bits*) for storing pointers in memory.  */
-#define POINTER_BOUNDARY (Pmode == DImode ? 64 : 32)
+#define POINTER_BOUNDARY ((unsigned int) (Pmode == DImode ? 64 : 32))
 
 /* Allocation boundary (in *bits*) for storing arguments in argument list.  */
-#define PARM_BOUNDARY (TARGET_64BIT ? 64 : 32)
+#define PARM_BOUNDARY ((unsigned int) (TARGET_64BIT ? 64 : 32))
 
 /* Allocation boundary (in *bits*) for the code of a function.  */
 #define FUNCTION_BOUNDARY 32
@@ -1421,9 +1421,7 @@ do {							\
 
 #define CONSTANT_ALIGNMENT(EXP, ALIGN)					\
   ((TREE_CODE (EXP) == STRING_CST  || TREE_CODE (EXP) == CONSTRUCTOR)	\
-   && (ALIGN) < BITS_PER_WORD						\
-	? BITS_PER_WORD							\
-	: (ALIGN))
+   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
 
 /* If defined, a C expression to compute the alignment for a static
    variable.  TYPE is the data type, and ALIGN is the alignment that
@@ -1582,12 +1580,16 @@ do {							\
    should be used instead.  */
 #define FPSW_REGNUM	ST_REG_FIRST
 
-#define GP_REG_P(REGNO) ((unsigned) ((REGNO) - GP_REG_FIRST) < GP_REG_NUM)
+#define GP_REG_P(REGNO)	\
+  ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
 #define M16_REG_P(REGNO) \
   (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17)
-#define FP_REG_P(REGNO) ((unsigned) ((REGNO) - FP_REG_FIRST) < FP_REG_NUM)
-#define MD_REG_P(REGNO) ((unsigned) ((REGNO) - MD_REG_FIRST) < MD_REG_NUM)
-#define ST_REG_P(REGNO) ((unsigned) ((REGNO) - ST_REG_FIRST) < ST_REG_NUM)
+#define FP_REG_P(REGNO)  \
+  ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
+#define MD_REG_P(REGNO) \
+  ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM)
+#define ST_REG_P(REGNO) \
+  ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM)
 
 /* Return number of consecutive hard regs needed starting at reg REGNO
    to hold something of mode MODE.
@@ -2453,12 +2455,12 @@ extern struct mips_frame_info current_frame_info;
 
 typedef struct mips_args {
   int gp_reg_found;		/* whether a gp register was found yet */
-  int arg_number;		/* argument number */
-  int arg_words;		/* # total words the arguments take */
-  int fp_arg_words;		/* # words for FP args (MIPS_EABI only) */
+  unsigned int arg_number;	/* argument number */
+  unsigned int arg_words;	/* # total words the arguments take */
+  unsigned int fp_arg_words;	/* # words for FP args (MIPS_EABI only) */
   int last_arg_fp;		/* nonzero if last arg was FP (EABI only) */
   int fp_code;			/* Mode of FP arguments (mips16) */
-  int num_adjusts;		/* number of adjustments made */
+  unsigned int num_adjusts;	/* number of adjustments made */
 				/* Adjustments made to args pass in regs.  */
 				/* ??? The size is doubled to work around a 
 				   bug in the code that sets the adjustments
@@ -2511,7 +2513,7 @@ typedef struct mips_args {
 
 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)				\
   (((TYPE) != 0)							\
-	? ((TYPE_ALIGN(TYPE) <= (unsigned)PARM_BOUNDARY)		\
+	? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY)				\
 		? PARM_BOUNDARY						\
 		: TYPE_ALIGN(TYPE))					\
 	: ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY)			\
diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c
index 8d84875..85a3d70 100644
--- a/gcc/config/sparc/sparc.c
+++ b/gcc/config/sparc/sparc.c
@@ -4057,22 +4057,25 @@ struct function_arg_record_value_parms
 {
   rtx ret;
   int slotno, named, regbase;
-  int nregs, intoffset;
+  unsigned int nregs;
+  int intoffset;
 };
 
 static void function_arg_record_value_3
-	PARAMS ((int, struct function_arg_record_value_parms *));
+	PARAMS ((HOST_WIDE_INT, struct function_arg_record_value_parms *));
 static void function_arg_record_value_2
-	PARAMS ((tree, int, struct function_arg_record_value_parms *));
+	PARAMS ((tree, HOST_WIDE_INT,
+		 struct function_arg_record_value_parms *));
 static void function_arg_record_value_1
-        PARAMS ((tree, int, struct function_arg_record_value_parms *));
+        PARAMS ((tree, HOST_WIDE_INT,
+		 struct function_arg_record_value_parms *));
 static rtx function_arg_record_value
 	PARAMS ((tree, enum machine_mode, int, int, int));
 
 static void
 function_arg_record_value_1 (type, startbitpos, parms)
      tree type;
-     int startbitpos;
+     HOST_WIDE_INT startbitpos;
      struct function_arg_record_value_parms *parms;
 {
   tree field;
@@ -4100,15 +4103,16 @@ function_arg_record_value_1 (type, startbitpos, parms)
     {
       if (TREE_CODE (field) == FIELD_DECL)
 	{
-	  int bitpos = startbitpos;
-	  if (DECL_FIELD_BITPOS (field))
-	    bitpos += TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field));
+	  HOST_WIDE_INT bitpos = startbitpos;
+
+	  if (DECL_SIZE (field) != 0
+	      && host_integerp (bit_position (field), 1))
+	    bitpos += int_bit_position (field);
+
 	  /* ??? FIXME: else assume zero offset.  */
 
 	  if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
-	    {
-	      function_arg_record_value_1 (TREE_TYPE (field), bitpos, parms);
-	    }
+	    function_arg_record_value_1 (TREE_TYPE (field), bitpos, parms);
 	  else if (TREE_CODE (TREE_TYPE (field)) == REAL_TYPE
 	           && TARGET_FPU
 	           && ! packed_p
@@ -4146,15 +4150,17 @@ function_arg_record_value_1 (type, startbitpos, parms)
 
 static void 
 function_arg_record_value_3 (bitpos, parms)
-     int bitpos;
+     HOST_WIDE_INT bitpos;
      struct function_arg_record_value_parms *parms;
 {
   enum machine_mode mode;
-  int regno, this_slotno, intslots, intoffset;
+  unsigned int regno;
+  int this_slotno, intslots, intoffset;
   rtx reg;
 
   if (parms->intoffset == -1)
     return;
+
   intoffset = parms->intoffset;
   parms->intoffset = -1;
 
@@ -4171,10 +4177,8 @@ function_arg_record_value_3 (bitpos, parms)
      at the moment but may wish to revisit.  */
 
   if (intoffset % BITS_PER_WORD != 0)
-    {
-      mode = mode_for_size (BITS_PER_WORD - intoffset%BITS_PER_WORD,
-			    MODE_INT, 0);
-    }
+    mode = mode_for_size (BITS_PER_WORD - intoffset % BITS_PER_WORD,
+			  MODE_INT, 0);
   else
     mode = word_mode;
 
@@ -4197,7 +4201,7 @@ function_arg_record_value_3 (bitpos, parms)
 static void
 function_arg_record_value_2 (type, startbitpos, parms)
      tree type;
-     int startbitpos;
+     HOST_WIDE_INT startbitpos;
      struct function_arg_record_value_parms *parms;
 {
   tree field;
@@ -4216,15 +4220,16 @@ function_arg_record_value_2 (type, startbitpos, parms)
     {
       if (TREE_CODE (field) == FIELD_DECL)
 	{
-	  int bitpos = startbitpos;
-	  if (DECL_FIELD_BITPOS (field))
-	    bitpos += TREE_INT_CST_LOW (DECL_FIELD_BITPOS (field));
+	  HOST_WIDE_INT bitpos = startbitpos;
+
+	  if (DECL_SIZE (field) != 0
+	      && host_integerp (bit_position (field), 1))
+	    bitpos += int_bit_position (field);
+
 	  /* ??? FIXME: else assume zero offset.  */
 
 	  if (TREE_CODE (TREE_TYPE (field)) == RECORD_TYPE)
-	    {
-	      function_arg_record_value_2 (TREE_TYPE (field), bitpos, parms);
-	    }
+	    function_arg_record_value_2 (TREE_TYPE (field), bitpos, parms);
 	  else if (TREE_CODE (TREE_TYPE (field)) == REAL_TYPE
 	           && TARGET_FPU
 	           && ! packed_p
@@ -4261,7 +4266,7 @@ function_arg_record_value (type, mode, slotno, named, regbase)
 {
   HOST_WIDE_INT typesize = int_size_in_bytes (type);
   struct function_arg_record_value_parms parms;
-  int nregs;
+  unsigned int nregs;
 
   parms.ret = NULL_RTX;
   parms.slotno = slotno;
diff --git a/gcc/expmed.c b/gcc/expmed.c
index 0f29b3b..25f1958 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -1138,7 +1138,7 @@ extract_bit_field (str_rtx, bitsize, bitnum, unsignedp,
 	  /* Offset from start of field in OP0.  */
 	  unsigned int bit_offset = (WORDS_BIG_ENDIAN
 				     ? MAX (0, ((int) bitsize - ((int) i + 1)
-						* BITS_PER_WORD))
+						* (int) BITS_PER_WORD))
 				     : (int) i * BITS_PER_WORD);
 	  rtx target_part = operand_subword (target, wordnum, 1, VOIDmode);
 	  rtx result_part