diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-12-13 18:57:21 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-12-13 18:57:21 +0000 |
| commit | 9db3ba4db28bae33d053752819c004ad28680bcc (patch) | |
| tree | 2d599da19ddd30ee474988d2f380ff07e980f5bb /tcg | |
| parent | 13412c9d2fce7c402e93a08177abdbc593208140 (diff) | |
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 <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6011 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/i386/tcg-target.c | 6 | ||||
| -rw-r--r-- | tcg/x86_64/tcg-target.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index fa0a2ca913..2a6ee837af 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -525,7 +525,13 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, tcg_out_modrm(s, 0xbf | P_EXT, data_reg, TCG_REG_EAX); break; case 0: + /* movzbl */ + tcg_out_modrm(s, 0xb6 | P_EXT, data_reg, TCG_REG_EAX); + break; case 1: + /* movzwl */ + tcg_out_modrm(s, 0xb7 | P_EXT, data_reg, TCG_REG_EAX); + break; case 2: default: tcg_out_mov(s, data_reg, TCG_REG_EAX); 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 */ |