From 9db3ba4db28bae33d053752819c004ad28680bcc Mon Sep 17 00:00:00 2001 From: aurel32 Date: Sat, 13 Dec 2008 18:57:21 +0000 Subject: TCG x86/x86-64: use move with zero-extend for loads/stores Starting with version 4.3, gcc returns the result of a function in rax/eax/ax/al instead of rax/eax, depending of the return type. As a consequence we should use a zero extend moe in TCG loads/stores. See http://gcc.gnu.org/ml/gcc/2008-01/msg00052.html for more details. A big thanks to malc who founds the problem and wrote the x86 patch. Signed-off-by: Aurelien Jarno git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6011 c046a42c-6fe2-441c-8c8c-71466251a162 --- tcg/x86_64/tcg-target.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'tcg/x86_64') diff --git a/tcg/x86_64/tcg-target.c b/tcg/x86_64/tcg-target.c index 551ca78bb9..ce58fa17c1 100644 --- a/tcg/x86_64/tcg-target.c +++ b/tcg/x86_64/tcg-target.c @@ -575,7 +575,13 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, tcg_out_modrm(s, 0x63 | P_REXW, data_reg, TCG_REG_RAX); break; case 0: + /* movzbq */ + tcg_out_modrm(s, 0xb6 | P_EXT | P_REXW, data_reg, TCG_REG_RAX); + break; case 1: + /* movzwq */ + tcg_out_modrm(s, 0xb7 | P_EXT | P_REXW, data_reg, TCG_REG_RAX); + break; case 2: default: /* movl */ -- cgit v1.2.3