diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:03 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:30 +0200 |
| commit | 8de6a1cc672d94e6ca793a1a7fcccf48b65b2e89 (patch) | |
| tree | 87143c5b35518d1db38d7bb2f0687c1c8a287435 /target-ppc/dfp_helper.c | |
| parent | 2128f8a57e1f1db97b8ba03eae4d8e5d94bf1ea5 (diff) | |
target-ppc: Introduce DFP Multiply
Add emulation of the PowerPC Decimal Floating Point Multiply instructions
dmul[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 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index d6d0c2dc70..e6c1098e47 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -261,6 +261,16 @@ static void dfp_check_for_VXISI_subtract(struct PPC_DFP *dfp) dfp_check_for_VXISI(dfp, 1); } +static void dfp_check_for_VXIMZ(struct PPC_DFP *dfp) +{ + if (dfp->context.status & DEC_Invalid_operation) { + if ((decNumberIsInfinite(&dfp->a) && decNumberIsZero(&dfp->b)) || + (decNumberIsInfinite(&dfp->b) && decNumberIsZero(&dfp->a))) { + dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXIMZ, FP_VE); + } + } +} + #define DFP_HELPER_TAB(op, dnop, postprocs, size) \ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, uint64_t *b) \ { \ @@ -302,3 +312,16 @@ static void SUB_PPs(struct PPC_DFP *dfp) DFP_HELPER_TAB(dsub, decNumberSubtract, SUB_PPs, 64) DFP_HELPER_TAB(dsubq, decNumberSubtract, SUB_PPs, 128) + +static void MUL_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_VXIMZ(dfp); +} + +DFP_HELPER_TAB(dmul, decNumberMultiply, MUL_PPs, 64) +DFP_HELPER_TAB(dmulq, decNumberMultiply, MUL_PPs, 128) |