[binutils-gdb] PPC_OPERAND_SIGNOPT range.

[Alan Modra <amodra at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a255f00a28d31979293d10cd2b121a1ca8d1fcf9

commit a255f00a28d31979293d10cd2b121a1ca8d1fcf9
Author: Alan Modra <amodra@gmail.com>
Date:   Wed May 18 11:27:56 2016 +0930

    PPC_OPERAND_SIGNOPT range.
    
    Commit b84bf58a accidentally extended the range of allowed negative
    numbers.
    
    	* config/tc-ppc.c (ppc_insert_operand): Trim PPC_OPERAND_SIGNOPT
    	allowed negative range.
    	* testsuite/gas/ppc/power9.s: Test xxspltib of -128, not -256.
    	* testsuite/gas/ppc/power9.d: Update.

Diff:
---
 gas/ChangeLog                  |  7 +++++++
 gas/config/tc-ppc.c            | 12 +++++-------
 gas/testsuite/gas/ppc/power9.d |  2 +-
 gas/testsuite/gas/ppc/power9.s |  2 +-
 4 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 745c13c..59bf350 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,10 @@
+2016-05-18  Alan Modra  <amodra@gmail.com>
+
+	* config/tc-ppc.c (ppc_insert_operand): Trim PPC_OPERAND_SIGNOPT
+	allowed negative range.
+	* testsuite/gas/ppc/power9.s: Test xxspltib of -128, not -256.
+	* testsuite/gas/ppc/power9.d: Update.
+
 2016-05-17  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* testsuite/gas/arm/archv8m-cmse-msr-base.d: Force Thumb when
diff --git a/gas/config/tc-ppc.c b/gas/config/tc-ppc.c
index 6346570..2492573 100644
--- a/gas/config/tc-ppc.c
+++ b/gas/config/tc-ppc.c
@@ -1787,17 +1787,15 @@ ppc_insert_operand (unsigned long insn,
 
   if ((operand->flags & PPC_OPERAND_SIGNOPT) != 0)
     {
-      /* Extend the allowed range for addis to [-65536, 65535].
-	 Similarly for some VLE high part insns.  For 64-bit it
-	 would be good to disable this for signed fields since the
+      /* Extend the allowed range for addis to [-32768, 65535].
+	 Similarly for cmpli and some VLE high part insns.  For 64-bit
+	 it would be good to disable this for signed fields since the
 	 value is sign extended into the high 32 bits of the register.
 	 If the value is, say, an address, then we might care about
 	 the high bits.  However, gcc as of 2014-06 uses unsigned
 	 values when loading the high part of 64-bit constants using
-	 lis.
-	 Use the same extended range for cmpli, to allow at least
-	 [-32768, 65535].  */
-      min = ~max & -right;
+	 lis.  */
+      min = ~(max >> 1) & -right;
     }
   else if ((operand->flags & PPC_OPERAND_SIGNED) != 0)
     {
diff --git a/gas/testsuite/gas/ppc/power9.d b/gas/testsuite/gas/ppc/power9.d
index d84e635..a1d4681 100644
--- a/gas/testsuite/gas/ppc/power9.d
+++ b/gas/testsuite/gas/ppc/power9.d
@@ -140,7 +140,7 @@ Disassembly of section \.text:
 .*:	(f0 80 2a 94|94 2a 80 f0) 	xxextractuw vs4,vs5,0
 .*:	(f1 0f 92 97|97 92 0f f1) 	xxextractuw vs40,vs50,15
 .*:	(f0 80 02 d0|d0 02 80 f0) 	xxspltib vs4,0
-.*:	(f0 80 02 d0|d0 02 80 f0) 	xxspltib vs4,0
+.*:	(f0 84 02 d0|d0 02 84 f0) 	xxspltib vs4,128
 .*:	(f1 27 fa d1|d1 fa 27 f1) 	xxspltib vs41,255
 .*:	(f1 27 fa d1|d1 fa 27 f1) 	xxspltib vs41,255
 .*:	(f0 a0 32 d4|d4 32 a0 f0) 	xxinsertw vs5,vs6,0
diff --git a/gas/testsuite/gas/ppc/power9.s b/gas/testsuite/gas/ppc/power9.s
index 9cf306c..34576b7 100644
--- a/gas/testsuite/gas/ppc/power9.s
+++ b/gas/testsuite/gas/ppc/power9.s
@@ -131,7 +131,7 @@ power9:
 	xxextractuw 4,5,0x0
 	xxextractuw 40,50,0xf
 	xxspltib    4,0x0
-	xxspltib    4,-256
+	xxspltib    4,-128
 	xxspltib    41,255
 	xxspltib    41,-1
 	xxinsertw   5,6,0