http://sourceware.org/bugzilla/show_bug.cgi?id=14338
Bug #: 14338
Summary: ssat instruction saturate_to field incorrectly
disassembled
Product: binutils
Version: 2.21
Status: NEW
Severity: normal
Priority: P2
Component: binutils
AssignedTo: unassig...@sourceware.org
ReportedBy: robinid...@googlemail.com
Classification: Unclassified
Created attachment 6517
--> http://sourceware.org/bugzilla/attachment.cgi?id=6517
Assembled object that disassembles incorrectly.
Assemble test-case.s:
$ cat test-case.s
.syntax unified
.arch armv7-m
.text
ssat r12,#16,r12
$ arm-none-eabi-gcc -march=armv7-m -mthumb -c test-case.s -o test-case.o
Now disassemble test-case.o (attached):
$ arm-none-eabi-objdump -d test-case.o
test-case.o: file format elf32-littlearm
Disassembly of section .text:
00000000 <.text>:
0: f30c 0c0f ssat ip, #15, ip
Note that the ssat instruction encodes the saturate_to field as one less than
the target so on disassembly we ought to add one to it. I think correct
disassembly would have been:
00000000 <.text>:
0: f30c 0c0f ssat ip, #16, ip
This is using 2.21 - I don't have a later version available to test (x86_64,
Fedora 17 host cross compiling to ARM7-M).
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