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tcg-arm: fix qemu_ld64

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Emulating fldl on arm doesn't seem to work too well. It's the way
qemu_ld64 is translated to arm instructions.

        tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
        tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);

Consider case where data_reg==0, data_reg2==1, and addr_reg==0. First load
overwrited addr_reg. So let's put an if (data_ref==addr_reg).

(Pablo Virolainen)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6808 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aurel32 2009-03-10 21:43:25 +00:00
parent 506bfcbb14
commit 419bafa517
1 changed files with 7 additions and 2 deletions
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9
tcg/arm/tcg-target.c
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@ -1011,8 +1011,13 @@ static inline void tcg_out_qemu_ld(TCGContext *s, int cond,
case 3:
/* TODO: use block load -
* check that data_reg2 > data_reg or the other way */
tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
if (data_reg == addr_reg) {
tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
} else {
tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0);
tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, 4);
}
break;
}
#endif