mirrors/qemu
0
0
Fork 0
mirror of https://github.com/qemu/qemu.git synced 2024-11-28 14:24:02 +08:00
Code Issues Packages Projects Releases Wiki Activity

tcg-sparc: Fix add2/sub2

Browse Source 
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>
This commit is contained in:
Richard Henderson 2012-10-10 09:02:41 -07:00 committed by Blue Swirl
parent 7d458a7567
commit 4ec28e255f
1 changed files with 22 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
tcg/sparc/tcg-target.c
View File

@ -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],