| Message ID | 20180604211106.4442-1-programmingkidx@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | tcg-target.inc.c: Use byte form of xgetbv instruction | expand |
Hi,
This series seems to have some coding style problems. See output below for
more information:
Type: series
Message-id: 20180604211106.4442-1-programmingkidx@gmail.com
Subject: [Qemu-devel] [PATCH] tcg-target.inc.c: Use byte form of xgetbv instruction
=== TEST SCRIPT BEGIN ===
#!/bin/bash
BASE=base
n=1
total=$(git log --oneline $BASE.. | wc -l)
failed=0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
commits="$(git log --format=%H --reverse $BASE..)"
for c in $commits; do
echo "Checking PATCH $n/$total: $(git log -n 1 --format=%s $c)..."
if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
failed=1
echo
fi
n=$((n+1))
done
exit $failed
=== TEST SCRIPT END ===
Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
From https://github.com/patchew-project/qemu
t [tag update] patchew/20180531205046.153256-1-eblake@redhat.com -> patchew/20180531205046.153256-1-eblake@redhat.com
* [new tag] patchew/20180604211106.4442-1-programmingkidx@gmail.com -> patchew/20180604211106.4442-1-programmingkidx@gmail.com
Switched to a new branch 'test'
8ee6e3972e tcg-target.inc.c: Use byte form of xgetbv instruction
=== OUTPUT BEGIN ===
Checking PATCH 1/1: tcg-target.inc.c: Use byte form of xgetbv instruction...
ERROR: trailing whitespace
#23: FILE: tcg/i386/tcg-target.inc.c:3505:
+ * The xgetbv instruction is not available to older versions of the $
ERROR: spaces required around that ':' (ctx:VxW)
#26: FILE: tcg/i386/tcg-target.inc.c:3508:
+ asm (".byte 0x0f, 0x01, 0xd0": "=a" (xcrl), "=d" (xcrh) : "c" (0));
^
total: 2 errors, 0 warnings, 12 lines checked
Your patch has style problems, please review. If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
=== OUTPUT END ===
Test command exited with code: 1
---
Email generated automatically by Patchew [http://patchew.org/].
Please send your feedback to patchew-devel@redhat.com
diff --git a/tcg/i386/tcg-target.inc.c b/tcg/i386/tcg-target.inc.c index 5357909..82e004a 100644 --- a/tcg/i386/tcg-target.inc.c +++ b/tcg/i386/tcg-target.inc.c @@ -3501,7 +3501,11 @@ static void tcg_target_init(TCGContext *s) sure of not hitting invalid opcode. */ if (c & bit_OSXSAVE) { unsigned xcrl, xcrh; - asm ("xgetbv" : "=a" (xcrl), "=d" (xcrh) : "c" (0)); + /* + * The xgetbv instruction is not available to older versions of the + * assembler, so we encode the instruction manually. + */ + asm (".byte 0x0f, 0x01, 0xd0": "=a" (xcrl), "=d" (xcrh) : "c" (0)); if ((xcrl & 6) == 6) { have_avx1 = (c & bit_AVX) != 0; have_avx2 = (b7 & bit_AVX2) != 0;
The assembler in most versions of Mac OS X is pretty old and does not support the xgetbv instruction. To go around this problem the raw encoding of the instruction is used instead. Signed-off-by: John Arbuckle <programmingkidx@gmail.com> --- tcg/i386/tcg-target.inc.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)