[Qemu-devel] [PULL 02/50] target/i386: set rip_offset for further SSE instructions

Paolo Bonzini posted 50 patches 8 years, 4 months ago
There is a newer version of this series
[Qemu-devel] [PULL 02/50] target/i386: set rip_offset for further SSE instructions
Posted by Paolo Bonzini 8 years, 4 months ago
From: Joseph Myers <joseph@codesourcery.com>

It turns out that my recent fix to set rip_offset when emulating some
SSE4.1 instructions needs generalizing to cover a wider class of
instructions.  Specifically, every instruction in the sse_op_table7
table, coming from various instruction set extensions, has an 8-bit
immediate operand that comes after any memory operand, and so needs
rip_offset set for correctness if there is a memory operand that is
rip-relative, and my patch only set it for a subset of those
instructions.  This patch moves the rip_offset setting to cover the
wider class of instructions, so fixing 9 further gcc testsuite
failures in my GCC 6-based testing.  (I do not know whether there
might be still further classes of instructions missing this setting.)

Signed-off-by: Joseph Myers <joseph@codesourcery.com>

Message-Id: <alpine.DEB.2.20.1708082350340.23380@digraph.polyomino.org.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/translate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/i386/translate.c b/target/i386/translate.c
index de0c989..a8986f4 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -4076,10 +4076,11 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
             if (!(s->cpuid_ext_features & sse_op_table7[b].ext_mask))
                 goto illegal_op;
 
+            s->rip_offset = 1;
+
             if (sse_fn_eppi == SSE_SPECIAL) {
                 ot = mo_64_32(s->dflag);
                 rm = (modrm & 7) | REX_B(s);
-                s->rip_offset = 1;
                 if (mod != 3)
                     gen_lea_modrm(env, s, modrm);
                 reg = ((modrm >> 3) & 7) | rex_r;
-- 
1.8.3.1