target-mips: fix incorrect behaviour for INSV

Corner case for INSV instruction when size=32 has not been correctly
implemented. The mask for size should be one bit wider, and preparing the
filter variable should be aware of this case too.

The test for INSV has been extended to include the case that triggers the
bug.

Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/tcg/mips/mips32-dsp/insv.c b/tests/tcg/mips/mips32-dsp/insv.c
index 243b00733d..9d674697cc 100644
--- a/tests/tcg/mips/mips32-dsp/insv.c
+++ b/tests/tcg/mips/mips32-dsp/insv.c
@@ -19,5 +19,18 @@ int main()
         );
     assert(rt == result);
 
+    dsp    = 0x1000;
+    rt     = 0xF0F0F0F0;
+    rs     = 0xA5A5A5A5;
+    result = 0xA5A5A5A5;
+
+    __asm
+        ("wrdsp %2\n\t"
+         "insv  %0, %1\n\t"
+         : "+r"(rt)
+         : "r"(rs), "r"(dsp)
+        );
+    assert(rt == result);
+
     return 0;
 }