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| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:02 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:30 +0200 |
| commit | 2128f8a57e1f1db97b8ba03eae4d8e5d94bf1ea5 (patch) | |
| tree | a62e3c75ff83d9cc9590020140732d7507d2a50f /target-ppc/dfp_helper.c | |
| parent | a9d7ba03b0fa8c7b6d660c6aafa736d16921728f (diff) | |
target-ppc: Introduce DFP Subtract
Add emulation of the PowerPC Decimal Floating Point Subtract instructions
dsub[q][.]
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/dfp_helper.c')
| -rw-r--r-- | target-ppc/dfp_helper.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 9f4cd3321c..d6d0c2dc70 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -256,6 +256,11 @@ static void dfp_check_for_VXISI_add(struct PPC_DFP *dfp) dfp_check_for_VXISI(dfp, 0); } +static void dfp_check_for_VXISI_subtract(struct PPC_DFP *dfp) +{ + dfp_check_for_VXISI(dfp, 1); +} + #define DFP_HELPER_TAB(op, dnop, postprocs, size) \ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, uint64_t *b) \ { \ @@ -284,3 +289,16 @@ static void ADD_PPs(struct PPC_DFP *dfp) DFP_HELPER_TAB(dadd, decNumberAdd, ADD_PPs, 64) DFP_HELPER_TAB(daddq, decNumberAdd, ADD_PPs, 128) + +static void SUB_PPs(struct PPC_DFP *dfp) +{ + dfp_set_FPRF_from_FRT(dfp); + dfp_check_for_OX(dfp); + dfp_check_for_UX(dfp); + dfp_check_for_XX(dfp); + dfp_check_for_VXSNAN(dfp); + dfp_check_for_VXISI_subtract(dfp); +} + +DFP_HELPER_TAB(dsub, decNumberSubtract, SUB_PPs, 64) +DFP_HELPER_TAB(dsubq, decNumberSubtract, SUB_PPs, 128) |