diff options
| author | Richard Henderson <rth@twiddle.net> | 2012-10-10 09:02:41 -0700 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2012-10-13 10:39:53 +0000 |
| commit | 4ec28e255f532c245cb477d49d0793af657e4149 (patch) | |
| tree | a51f1e3e8fb03513438966f86510f6f459b28e72 /tcg | |
| parent | 7d458a7567ffde5b16d7a4b5e9f585434b2afc35 (diff) | |
tcg-sparc: Fix add2/sub2
We must care not to clobber the high parts before we consume them.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/sparc/tcg-target.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c index 31e8204b31..d6da9fa953 100644 --- a/tcg/sparc/tcg-target.c +++ b/tcg/sparc/tcg-target.c @@ -704,6 +704,22 @@ static void tcg_out_setcond2_i32(TCGContext *s, TCGCond cond, TCGArg ret, break; } } + +static void tcg_out_addsub2(TCGContext *s, TCGArg rl, TCGArg rh, + TCGArg al, TCGArg ah, TCGArg bl, int blconst, + TCGArg bh, int bhconst, int opl, int oph) +{ + TCGArg tmp = TCG_REG_T1; + + /* Note that the low parts are fully consumed before tmp is set. */ + if (rl != ah && (bhconst || rl != bh)) { + tmp = rl; + } + + tcg_out_arithc(s, tmp, al, bl, blconst, opl); + tcg_out_arithc(s, rh, ah, bh, bhconst, oph); + tcg_out_mov(s, TCG_TYPE_I32, rl, tmp); +} #endif /* Generate global QEMU prologue and epilogue code */ @@ -1243,16 +1259,14 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args, args[4], const_args[4]); break; case INDEX_op_add2_i32: - tcg_out_arithc(s, args[0], args[2], args[4], const_args[4], - ARITH_ADDCC); - tcg_out_arithc(s, args[1], args[3], args[5], const_args[5], - ARITH_ADDX); + tcg_out_addsub2(s, args[0], args[1], args[2], args[3], + args[4], const_args[4], args[5], const_args[5], + ARITH_ADDCC, ARITH_ADDX); break; case INDEX_op_sub2_i32: - tcg_out_arithc(s, args[0], args[2], args[4], const_args[4], - ARITH_SUBCC); - tcg_out_arithc(s, args[1], args[3], args[5], const_args[5], - ARITH_SUBX); + tcg_out_addsub2(s, args[0], args[1], args[2], args[3], + args[4], const_args[4], args[5], const_args[5], + ARITH_SUBCC, ARITH_SUBX); break; case INDEX_op_mulu2_i32: tcg_out_arithc(s, args[0], args[2], args[3], const_args[3], |