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target-arm: Treat UNPREDICTABLE VTBL, VTBX case as UNDEF 

Catch the UNPREDICTABLE case for Neon VTBL,VTBX, and UNDEF it
rather than allowing the helper function to index off the end
of the register file.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
master
Peter Maydell 2011-04-11 16:26:22 +01:00 committed by Aurelien Jarno
parent fc2a9b3784
commit 56907d776e
1 changed files with 8 additions and 1 deletions
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9
target-arm/translate.c
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@ -6023,7 +6023,14 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
}
} else if ((insn & (1 << 10)) == 0) {
/* VTBL, VTBX. */
int n = ((insn >> 5) & 0x18) + 8;
int n = ((insn >> 8) & 3) + 1;
if ((rn + n) > 32) {
/* This is UNPREDICTABLE; we choose to UNDEF to avoid the
* helper function running off the end of the register file.
*/
return 1;
}
n <<= 3;
if (insn & (1 << 6)) {
tmp = neon_load_reg(rd, 0);
} else {