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authorAlan Modra <amodra@gmail.com>2020-09-01 07:48:02 +0930
committerAlan Modra <amodra@gmail.com>2020-09-01 16:03:08 +0930
commit8dbe96f07060bc41499557d2837afbfffa1aa7fc (patch)
tree236d23173e050e2ccc00e8456d9de5f2b63ec759 /cpu
parent821e059c2626fb0b2ee91898b1c74ea9636c6175 (diff)
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mep: ubsan: mep-ibld.c:1635,1645,1652 left shift of negative value
cpu/ * mep-core.cpu (f-8s8a2, f-12s4a2, f-17s16a2): Multiply signed value by two rather than shifting left. (f-24s5a2n): Similarly multiply signed f-24s5a2n-hi to extract. opcodes/ * mep-ibld.c: Regenerate.
Diffstat (limited to 'cpu')
-rw-r--r--cpu/ChangeLog6
-rw-r--r--cpu/mep-core.cpu10
2 files changed, 11 insertions, 5 deletions
diff --git a/cpu/ChangeLog b/cpu/ChangeLog
index f810248..6609a05 100644
--- a/cpu/ChangeLog
+++ b/cpu/ChangeLog
@@ -1,3 +1,9 @@
+2020-09-01 Alan Modra <amodra@gmail.com>
+
+ * mep-core.cpu (f-8s8a2, f-12s4a2, f-17s16a2): Multiply signed
+ value by two rather than shifting left.
+ (f-24s5a2n): Similarly multiply signed f-24s5a2n-hi to extract.
+
2020-08-26 David Faust <david.faust@oracle.com>
* bpf.cpu (arch bpf): Add xbpf mach and isas.
diff --git a/cpu/mep-core.cpu b/cpu/mep-core.cpu
index accf00e..bdc9c62 100644
--- a/cpu/mep-core.cpu
+++ b/cpu/mep-core.cpu
@@ -430,15 +430,15 @@
(df f-8s8a2 "pc-rel addr (8 bits)" (all-mep-core-isas PCREL-ADDR) 8 7 INT
((value pc) (sra SI (sub SI value pc) 1))
- ((value pc) (add SI (sll SI value 1) pc)))
+ ((value pc) (add SI (mul SI value 2) pc)))
(df f-12s4a2 "pc-rel addr (12 bits)" (all-mep-core-isas PCREL-ADDR) 4 11 INT
((value pc) (sra SI (sub SI value pc) 1))
- ((value pc) (add SI (sll SI value 1) pc)))
+ ((value pc) (add SI (mul SI value 2) pc)))
(df f-17s16a2 "pc-rel addr (17 bits)" (all-mep-core-isas PCREL-ADDR) 16 16 INT
((value pc) (sra SI (sub SI value pc) 1))
- ((value pc) (add SI (sll SI value 1) pc)))
+ ((value pc) (add SI (mul SI value 2) pc)))
(df f-24s5a2n-hi "24s5a2n hi 16s16" (all-mep-core-isas PCREL-ADDR) 16 16 INT #f #f)
(df f-24s5a2n-lo "24s5a2n lo 7s5a2" (all-mep-core-isas PCREL-ADDR) 5 7 UINT #f #f)
@@ -456,7 +456,7 @@
(set (ifield f-24s5a2n-hi)
(sra INT (ifield f-24s5a2n) 8))))
(extract (set (ifield f-24s5a2n)
- (add SI (or (sll (ifield f-24s5a2n-hi) 8)
+ (add SI (or (mul (ifield f-24s5a2n-hi) 256)
(sll (ifield f-24s5a2n-lo) 1))
pc)))
)
@@ -486,7 +486,7 @@
(df f-7u9 "tp-rel b (7 bits)" (all-mep-core-isas) 9 7 UINT #f #f)
(df f-7u9a2 "tp-rel h (7 bits)" (all-mep-core-isas) 9 6 UINT
((value pc) (srl SI value 1))
- ((value pc) (sll SI value 1)))
+ ((value pc) (mul SI value 2)))
(df f-7u9a4 "tp/sp-rel w (7 bits)" (all-mep-core-isas) 9 5 UINT
((value pc) (srl SI value 2))
((value pc) (sll SI value 2)))