[67/77] Use scalar_mode in fixed-value.*

This patch makes the fixed-value.* routines use scalar_mode.
It would be possible to define special classes for these modes, as for
scalar_int_mode and scalar_float_mode, but at the moment nothing would
benefit from them.  In particular, there's no use case that would help
select between one class for all fixed-point modes versus one class for
fractional modes and one class for accumulator modes.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* fixed-value.h (fixed_from_double_int): Take a scalar_mode
	rather than a machine_mode.
	(fixed_from_string): Likewise.
	(fixed_convert): Likewise.
	(fixed_convert_from_int): Likewise.
	(fixed_convert_from_real): Likewise.
	(real_convert_from_fixed): Likewise.
	* fixed-value.c (fixed_from_double_int): Likewise.
	(fixed_from_string): Likewise.
	(fixed_convert): Likewise.
	(fixed_convert_from_int): Likewise.
	(fixed_convert_from_real): Likewise.
	(real_convert_from_fixed): Likewise.
	* config/avr/avr.c (avr_out_round): Use as_a <scalar_mode>.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r251518

4 files changed, 33 insertions, 15 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ed48b55..88ed52e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -2,6 +2,25 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* fixed-value.h (fixed_from_double_int): Take a scalar_mode
+	rather than a machine_mode.
+	(fixed_from_string): Likewise.
+	(fixed_convert): Likewise.
+	(fixed_convert_from_int): Likewise.
+	(fixed_convert_from_real): Likewise.
+	(real_convert_from_fixed): Likewise.
+	* fixed-value.c (fixed_from_double_int): Likewise.
+	(fixed_from_string): Likewise.
+	(fixed_convert): Likewise.
+	(fixed_convert_from_int): Likewise.
+	(fixed_convert_from_real): Likewise.
+	(real_convert_from_fixed): Likewise.
+	* config/avr/avr.c (avr_out_round): Use as_a <scalar_mode>.
+
+2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* emit-rtl.c (immed_double_const): Use is_a <scalar_mode> instead
 	of separate mode class checks.  Do not allow vector modes here.
 	(immed_wide_int_const): Use as_a <scalar_mode>.
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c
index ad777e0..c1d2749 100644
--- a/gcc/config/avr/avr.c
+++ b/gcc/config/avr/avr.c
@@ -9176,7 +9176,7 @@ avr_out_fract (rtx_insn *insn, rtx operands[], bool intsigned, int *plen)
 const char*
 avr_out_round (rtx_insn *insn ATTRIBUTE_UNUSED, rtx *xop, int *plen)
 {
-  machine_mode mode = GET_MODE (xop[0]);
+  scalar_mode mode = as_a <scalar_mode> (GET_MODE (xop[0]));
   scalar_int_mode imode = int_mode_for_mode (mode).require ();
   // The smallest fractional bit not cleared by the rounding is 2^(-RP).
   int fbit = (int) GET_MODE_FBIT (mode);
diff --git a/gcc/fixed-value.c b/gcc/fixed-value.c
index 3cd44dd..3c92453 100644
--- a/gcc/fixed-value.c
+++ b/gcc/fixed-value.c
@@ -86,7 +86,7 @@ check_real_for_fixed_mode (REAL_VALUE_TYPE *real_value, machine_mode mode)
    The bits in PAYLOAD are sign-extended/zero-extended according to MODE.  */
 
 FIXED_VALUE_TYPE
-fixed_from_double_int (double_int payload, machine_mode mode)
+fixed_from_double_int (double_int payload, scalar_mode mode)
 {
   FIXED_VALUE_TYPE value;
 
@@ -108,7 +108,7 @@ fixed_from_double_int (double_int payload, machine_mode mode)
 /* Initialize from a decimal or hexadecimal string.  */
 
 void
-fixed_from_string (FIXED_VALUE_TYPE *f, const char *str, machine_mode mode)
+fixed_from_string (FIXED_VALUE_TYPE *f, const char *str, scalar_mode mode)
 {
   REAL_VALUE_TYPE real_value, fixed_value, base_value;
   unsigned int fbit;
@@ -803,7 +803,7 @@ fixed_compare (int icode, const FIXED_VALUE_TYPE *op0,
    Return true, if !SAT_P and overflow.  */
 
 bool
-fixed_convert (FIXED_VALUE_TYPE *f, machine_mode mode,
+fixed_convert (FIXED_VALUE_TYPE *f, scalar_mode mode,
                const FIXED_VALUE_TYPE *a, bool sat_p)
 {
   bool overflow_p = false;
@@ -947,7 +947,7 @@ fixed_convert (FIXED_VALUE_TYPE *f, machine_mode mode,
    Return true, if !SAT_P and overflow.  */
 
 bool
-fixed_convert_from_int (FIXED_VALUE_TYPE *f, machine_mode mode,
+fixed_convert_from_int (FIXED_VALUE_TYPE *f, scalar_mode mode,
 			double_int a, bool unsigned_p, bool sat_p)
 {
   bool overflow_p = false;
@@ -1031,7 +1031,7 @@ fixed_convert_from_int (FIXED_VALUE_TYPE *f, machine_mode mode,
    Return true, if !SAT_P and overflow.  */
 
 bool
-fixed_convert_from_real (FIXED_VALUE_TYPE *f, machine_mode mode,
+fixed_convert_from_real (FIXED_VALUE_TYPE *f, scalar_mode mode,
 			 const REAL_VALUE_TYPE *a, bool sat_p)
 {
   bool overflow_p = false;
@@ -1090,7 +1090,7 @@ fixed_convert_from_real (FIXED_VALUE_TYPE *f, machine_mode mode,
 /* Convert to a new real mode from a fixed-point.  */
 
 void
-real_convert_from_fixed (REAL_VALUE_TYPE *r, machine_mode mode,
+real_convert_from_fixed (REAL_VALUE_TYPE *r, scalar_mode mode,
 			 const FIXED_VALUE_TYPE *f)
 {
   REAL_VALUE_TYPE base_value, fixed_value, real_value;
diff --git a/gcc/fixed-value.h b/gcc/fixed-value.h
index 608c872..cc2180b 100644
--- a/gcc/fixed-value.h
+++ b/gcc/fixed-value.h
@@ -47,14 +47,13 @@ extern rtx const_fixed_from_fixed_value (FIXED_VALUE_TYPE, machine_mode);
 
 /* Construct a FIXED_VALUE from a bit payload and machine mode MODE.
    The bits in PAYLOAD are sign-extended/zero-extended according to MODE.  */
-extern FIXED_VALUE_TYPE fixed_from_double_int (double_int,
-						     machine_mode);
+extern FIXED_VALUE_TYPE fixed_from_double_int (double_int, scalar_mode);
 
 /* Return a CONST_FIXED from a bit payload and machine mode MODE.
    The bits in PAYLOAD are sign-extended/zero-extended according to MODE.  */
 static inline rtx
 const_fixed_from_double_int (double_int payload,
-                             machine_mode mode)
+			     scalar_mode mode)
 {
   return
     const_fixed_from_fixed_value (fixed_from_double_int (payload, mode),
@@ -63,25 +62,25 @@ const_fixed_from_double_int (double_int payload,
 
 /* Initialize from a decimal or hexadecimal string.  */
 extern void fixed_from_string (FIXED_VALUE_TYPE *, const char *,
-			       machine_mode);
+			       scalar_mode);
 
 /* In tree.c: wrap up a FIXED_VALUE_TYPE in a tree node.  */
 extern tree build_fixed (tree, FIXED_VALUE_TYPE);
 
 /* Extend or truncate to a new mode.  */
-extern bool fixed_convert (FIXED_VALUE_TYPE *, machine_mode,
+extern bool fixed_convert (FIXED_VALUE_TYPE *, scalar_mode,
 			   const FIXED_VALUE_TYPE *, bool);
 
 /* Convert to a fixed-point mode from an integer.  */
-extern bool fixed_convert_from_int (FIXED_VALUE_TYPE *, machine_mode,
+extern bool fixed_convert_from_int (FIXED_VALUE_TYPE *, scalar_mode,
 				    double_int, bool, bool);
 
 /* Convert to a fixed-point mode from a real.  */
-extern bool fixed_convert_from_real (FIXED_VALUE_TYPE *, machine_mode,
+extern bool fixed_convert_from_real (FIXED_VALUE_TYPE *, scalar_mode,
 				     const REAL_VALUE_TYPE *, bool);
 
 /* Convert to a real mode from a fixed-point.  */
-extern void real_convert_from_fixed (REAL_VALUE_TYPE *, machine_mode,
+extern void real_convert_from_fixed (REAL_VALUE_TYPE *, scalar_mode,
 				     const FIXED_VALUE_TYPE *);
 
 /* Compare two fixed-point objects for bitwise identity.  */