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target-arm: Handle UNDEF cases for Neon VLD/VST multiple-structures 

Correctly UNDEF for Neon VLD/VST "multiple structures" forms where the
align field is not valid.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-04-18 19:07:12 +01:00 committed by Aurelien Jarno
parent 93262b1625
commit f2dd89d0c7
1 changed files with 15 additions and 0 deletions
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15
target-arm/translate.c
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@ -3830,6 +3830,21 @@ static int disas_neon_ls_insn(CPUState * env, DisasContext *s, uint32_t insn)
size = (insn >> 6) & 3;
if (op > 10)
return 1;
/* Catch UNDEF cases for bad values of align field */
switch (op & 0xc) {
case 4:
if (((insn >> 5) & 1) == 1) {
return 1;
}
break;
case 8:
if (((insn >> 4) & 3) == 3) {
return 1;
}
break;
default:
break;
}
nregs = neon_ls_element_type[op].nregs;
interleave = neon_ls_element_type[op].interleave;
spacing = neon_ls_element_type[op].spacing;