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target-mips: fix incorrect behaviour for EXTP

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The mask for EXTP instruction when size=31 has not been correctly
calculated.

The test (mips32-dsp/extp.c) has been extended to include the case that
triggers the issue.

Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Petar Jovanovic 2013-05-13 15:20:26 +02:00 • committed by Aurelien Jarno
parent 91b96cdc5b
commit 489ed4bbae
2 changed files with 19 additions and 2 deletions
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18
tests/tcg/mips/mips32-dsp/extp.c
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@ -40,5 +40,23 @@ int main()
dsp = (dsp >> 14) & 0x01;
assert(dsp == 1);
ach = 0;
acl = 0x80000001;
dsp = 0x1F;
result = 0x80000001;
__asm
("wrdsp %1\n\t"
"mthi %2, $ac2\n\t"
"mtlo %3, $ac2\n\t"
"extp %0, $ac2, 0x1F\n\t"
"rddsp %1\n\t"
: "=r"(rt), "+r"(dsp)
: "r"(ach), "r"(acl)
);
dsp = (dsp >> 14) & 0x01;
assert(dsp == 0);
assert(result == rt);
return 0;
}