Update sparc constraint comments and documentation.

	* config/sparc/constraints.md: Update unused letter list, move
	"w" near other memory constraints.  Remove no longer relevant
	comment.
	* doc/md.texi: Sync sparc constraint documentation with reality.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@192871 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 5 deletions

diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
index 88e1ca7c4f6..dfbdc4c2903 100644
--- a/gcc/doc/md.texi
+++ b/gcc/doc/md.texi
@@ -3219,6 +3219,9 @@ when the Visual Instruction Set is available.
 @item h
 64-bit global or out register for the SPARC-V8+ architecture.
 
+@item C
+The constant all-ones, for floating-point.
+
 @item D
 A vector constant
 
@@ -3233,10 +3236,12 @@ Zero
 loaded with the @code{sethi} instruction)
 
 @item L
-A constant in the range supported by @code{movcc} instructions
+A constant in the range supported by @code{movcc} instructions (11-bit
+signed immediate)
 
 @item M
-A constant in the range supported by @code{movrcc} instructions
+A constant in the range supported by @code{movrcc} instructions (10-bit
+signed immediate)
 
 @item N
 Same as @samp{K}, except that it verifies that bits that are not in the
@@ -3252,6 +3257,9 @@ Floating-point zero
 @item H
 Signed 13-bit constant, sign-extended to 32 or 64 bits
 
+@item P
+The constant -1
+
 @item Q
 Floating-point constant whose integral representation can
 be moved into an integer register using a single sethi
@@ -3270,12 +3278,12 @@ instruction sequence
 @item T
 Memory address aligned to an 8-byte boundary
 
-@item U
-Even register
-
 @item W
 Memory address for @samp{e} constraint registers
 
+@item w
+Memory address with only a base register
+
 @item Y
 Vector zero