[PATCH] [llvm-mc] Fix bad sign extension on callw immediate

[Matthew Barney]

I added the unit tests as a separate commit; I was unsure what the protocol is in this case.  Just in case, I've added the same diff in this comment.

diff --git a/test/MC/Disassembler/X86/x86-32.txt b/test/MC/Disassembler/X86/x86-32.txt
index 830b830..aaf9e5b 100644

- a/test/MC/Disassembler/X86/x86-32.txt

+++ b/test/MC/Disassembler/X86/x86-32.txt
@@ -54,6 +54,12 @@

1. CHECK: calll -1234 0xe8 0x2e 0xfb 0xff 0xff

+# CHECK: callw -1
+0x66 0xe8 0xff 0xff
+
+# CHECK: callw 32767
+0x66 0xe8 0xff 0x7f
+

1. CHECK: lfence 0x0f 0xae 0xe8

diff --git a/test/MC/Disassembler/X86/x86-64.txt b/test/MC/Disassembler/X86/x86-64.txt
index f000d15..3088619 100644

- a/test/MC/Disassembler/X86/x86-64.txt

+++ b/test/MC/Disassembler/X86/x86-64.txt
@@ -301,3 +301,9 @@

1. CHECK: movq %rax, 1515870810 0x67, 0x48 0xa3 0x5a 0x5a 0x5a 0x5a

+
+# CHECK: callq -32769
+0xe8 0xff 0x7f 0xff 0xff
+
+# CHECK: callq 32767
+0xe8 0xff 0x7f 0x00 0x00


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http://reviews.llvm.org/D9514

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