motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

tcg: Use HAVE_CMPXCHG128 instead of CONFIG_CMPXCHG128

Browse source 
We adjust CONFIG_ATOMIC128 and CONFIG_CMPXCHG128 with
CONFIG_ATOMIC128_OPT in atomic128.h.  It is difficult
to tell when those changes have been applied with the
ifdef we must use with CONFIG_CMPXCHG128.  So instead
use HAVE_CMPXCHG128, which triggers -Werror-undef when
the proper header has not been included.

Improves tcg_gen_atomic_cmpxchg_i128 for s390x host, which
requires CONFIG_ATOMIC128_OPT.  Without this we fall back
to EXCP_ATOMIC to single-step 128-bit atomics, which is
slow enough to cause some tests to time out.

Reported-by: Thomas Huth <thuth@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-07-13 20:06:15 +00:00
parent deba78709a
commit 76f9d6ad19
6 changed files with 7 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/exec/helper-proto-common.h
View file

@ -7,6 +7,8 @@
#ifndef HELPER_PROTO_COMMON_H
#define HELPER_PROTO_COMMON_H
#include "qemu/atomic128.h" /* for HAVE_CMPXCHG128 */
#define HELPER_H "accel/tcg/tcg-runtime.h"
#include "exec/helper-proto.h.inc"
#undef HELPER_H