diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-10-12 23:32:40 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-10-12 23:32:40 +0000 |
| commit | c69e3264c3553697077f88571829face4e673100 (patch) | |
| tree | 4fd011642d9380867ee7233374a1b3d92fb6f500 /target-sh4/translate.c | |
| parent | f71903d020667ae704cf803d0cd64f80c879c6d0 (diff) | |
SH4: Fix swap.b
The SH4 manual documents the swap.b instruction as follows:
SWAP.B Rm,Rn
Rm → swap lower 2 bytes → Rn
Current QEMU code, in addition to the above, also clears the high
16 bits. The immediate breakage I saw is that htonl function applied
to netmask of 255.255.255.0 gives 0, which breaks all networking.
(Vladimir Prus)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5471 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-sh4/translate.c')
| -rw-r--r-- | target-sh4/translate.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/target-sh4/translate.c b/target-sh4/translate.c index 91821a18ae..ced761f2a5 100644 --- a/target-sh4/translate.c +++ b/target-sh4/translate.c @@ -683,7 +683,9 @@ void _decode_opc(DisasContext * ctx) return; case 0x6008: /* swap.b Rm,Rn */ { - TCGv high, low; + TCGv highw, high, low; + highw = tcg_temp_new(TCG_TYPE_I32); + tcg_gen_andi_i32(highw, REG(B7_4), 0xffff0000); high = tcg_temp_new(TCG_TYPE_I32); tcg_gen_ext8u_i32(high, REG(B7_4)); tcg_gen_shli_i32(high, high, 8); @@ -691,6 +693,7 @@ void _decode_opc(DisasContext * ctx) tcg_gen_shri_i32(low, REG(B7_4), 8); tcg_gen_ext8u_i32(low, low); tcg_gen_or_i32(REG(B11_8), high, low); + tcg_gen_or_i32(REG(B11_8), REG(B11_8), highw); tcg_temp_free(low); tcg_temp_free(high); } |