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| author | Mike Frysinger <vapier@gentoo.org> | 2024-01-07 00:22:55 -0500 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2024-01-08 20:01:45 -0500 |
| commit | b0c687b2ca6e5910b0494c80d01d6b48ff6f0c51 (patch) | |
| tree | 024c7255fdb017b42ab088bfa15719dd812b8226 /sim | |
| parent | b2ea48df925a6d41f63e88b26dbf3f17cde0f252 (diff) | |
| download | gdb-b0c687b2ca6e5910b0494c80d01d6b48ff6f0c51.zip gdb-b0c687b2ca6e5910b0494c80d01d6b48ff6f0c51.tar.gz gdb-b0c687b2ca6e5910b0494c80d01d6b48ff6f0c51.tar.bz2 | |
sim: bfin: avoid left shifting negative values
We just want to create a bitmask here, so cast the mask to unsigned
to avoid left shifting a negative value which is undefined behavior.
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/bfin/bfin-sim.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sim/bfin/bfin-sim.c b/sim/bfin/bfin-sim.c index 1a9b499..2e7a563 100644 --- a/sim/bfin/bfin-sim.c +++ b/sim/bfin/bfin-sim.c @@ -786,7 +786,7 @@ lshift (SIM_CPU *cpu, bu64 val, int cnt, int size, bool saturate, bool overflow) However, it's a little more complex than looking at sign bits, we need to see if we are shifting the sign information away... */ if (((val << cnt) >> size) == 0 - || (((val << cnt) >> size) == ~(~0 << cnt) + || (((val << cnt) >> size) == ~((bu32)~0 << cnt) && ((new_val >> (size - 1)) & 0x1))) v_i = 0; else @@ -5880,7 +5880,7 @@ decode_dsp32shiftimm_0 (SIM_CPU *cpu, bu16 iw0, bu16 iw1) bu16 inshift = in << shift; if (((inshift & ~0xFFFF) - && ((inshift & ~0xFFFF) >> 16) != ~(~0 << shift)) + && ((inshift & ~0xFFFF) >> 16) != ~((bu32)~0 << shift)) || (inshift & 0x8000) != (in & 0x8000)) { if (in & 0x8000) |