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| author | Chao-ying Fu <fu@mips.com> | 2006-05-15 20:34:18 +0000 |
|---|---|---|
| committer | Chao-ying Fu <fu@mips.com> | 2006-05-15 20:34:18 +0000 |
| commit | 69088b17068a002cfdad9aaa12a3e486b9f47f61 (patch) | |
| tree | b088e6287b1db877996114c83033376966ec35b0 /sim | |
| parent | b07969118378598261be761f87630385a7627879 (diff) | |
| download | gdb-69088b17068a002cfdad9aaa12a3e486b9f47f61.zip gdb-69088b17068a002cfdad9aaa12a3e486b9f47f61.tar.gz gdb-69088b17068a002cfdad9aaa12a3e486b9f47f61.tar.bz2 | |
* dsp.igen (do_ph_shift, do_w_shra): Fix bugs for rounding instructions.
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/mips/ChangeLog | 4 | ||||
| -rw-r--r-- | sim/mips/dsp.igen | 14 |
2 files changed, 12 insertions, 6 deletions
diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog index e3c2283..5a0228d 100644 --- a/sim/mips/ChangeLog +++ b/sim/mips/ChangeLog @@ -1,3 +1,7 @@ +2006-05-15 Chao-ying Fu <fu@mips.com> + + * dsp.igen (do_ph_shift, do_w_shra): Fix bugs for rounding instructions. + 2006-04-18 Nick Clifton <nickc@redhat.com> * dv-tx3904tmr.c (deliver_tx3904tmr_tick): Add missing break diff --git a/sim/mips/dsp.igen b/sim/mips/dsp.igen index 9c39b71..18aafcb 100644 --- a/sim/mips/dsp.igen +++ b/sim/mips/dsp.igen @@ -193,9 +193,10 @@ } else // right { - if (sat == 1 && shift != 0) - h0 += (1 << (shift - 1)); - h0 = h0 >> shift; + if (sat == 1 && shift != 0 && (h0 & (1 << (shift-1)))) + h0 = (h0 >> shift) + 1; + else + h0 = h0 >> shift; } result |= ((unsigned32)((unsigned16)h0) << i); @@ -246,9 +247,10 @@ { unsigned32 result = GPR[rt]; signed32 h0 = (signed32)result; - if (shift != 0) - h0 += (1 << (shift - 1)); - h0 = h0 >> shift; + if (shift != 0 && (h0 & (1 << (shift-1)))) + h0 = (h0 >> shift) + 1; + else + h0 = h0 >> shift; GPR[rd] = EXTEND32 (h0); } |