[gem5-dev] changeset in gem5: arm: Fix fplib 128-bit shift operators

[Nathanael Premillieu]

changeset a7a718faaf56 in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=a7a718faaf56
description:
        arm: Fix fplib 128-bit shift operators

        Appease clang.

diffstat:

 src/arch/arm/insts/fplib.cc |  10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r 2981e399c816 -r a7a718faaf56 src/arch/arm/insts/fplib.cc
--- a/src/arch/arm/insts/fplib.cc       Sun Nov 22 05:10:17 2015 -0500
+++ b/src/arch/arm/insts/fplib.cc       Sun Nov 22 05:10:18 2015 -0500
@@ -101,7 +101,10 @@
 static inline void
 lsl128(uint64_t *r0, uint64_t *r1, uint64_t x0, uint64_t x1, uint32_t shift)
 {
-    if (shift < 64) {
+    if (shift == 0) {
+        *r1 = x1;
+        *r0 = x0;
+    } else if (shift < 64) {
         *r1 = x1 << shift | x0 >> (64 - shift);
         *r0 = x0 << shift;
     } else if (shift < 128) {
@@ -116,7 +119,10 @@
 static inline void
 lsr128(uint64_t *r0, uint64_t *r1, uint64_t x0, uint64_t x1, uint32_t shift)
 {
-    if (shift < 64) {
+    if (shift == 0) {
+        *r1 = x1;
+        *r0 = x0;
+    } else if (shift < 64) {
         *r0 = x0 >> shift | x1 << (64 - shift);
         *r1 = x1 >> shift;
     } else if (shift < 128) {
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