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| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:12 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:31 +0200 |
| commit | 97c0d93041857cf64ceddbf59f37cf396af7fe21 (patch) | |
| tree | 84e6d568ece2fb6910d897411aefdbaa56e9be7d /target-ppc/dfp_helper.c | |
| parent | 512918aa79da893aa85d80319a54b891d7d8c10f (diff) | |
| download | qemu-97c0d93041857cf64ceddbf59f37cf396af7fe21.zip qemu-97c0d93041857cf64ceddbf59f37cf396af7fe21.tar.gz qemu-97c0d93041857cf64ceddbf59f37cf396af7fe21.tar.bz2 | |
target-ppc: Introduce DFP Round to Integer
Add emulation of the PowerPC Decimal Floating Point (DFP) Round
to FP Integer With Inexact (drintx[q][.]) and DFP Round to FP
Integer Without Inexact (drintn[q][.]) instructions.
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 | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 23f85c4..243ed89 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -800,3 +800,43 @@ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, \ DFP_HELPER_RRND(drrnd, 64) DFP_HELPER_RRND(drrndq, 128) + +#define DFP_HELPER_RINT(op, postprocs, size) \ +void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *b, \ + uint32_t r, uint32_t rmc) \ +{ \ + struct PPC_DFP dfp; \ + \ + dfp_prepare_decimal##size(&dfp, 0, b, env); \ + \ + dfp_set_round_mode_from_immediate(r, rmc, &dfp); \ + decNumberToIntegralExact(&dfp.t, &dfp.b, &dfp.context); \ + decimal##size##FromNumber((decimal##size *)dfp.t64, &dfp.t, &dfp.context); \ + postprocs(&dfp); \ + \ + if (size == 64) { \ + t[0] = dfp.t64[0]; \ + } else if (size == 128) { \ + t[0] = dfp.t64[HI_IDX]; \ + t[1] = dfp.t64[LO_IDX]; \ + } \ +} + +static void RINTX_PPs(struct PPC_DFP *dfp) +{ + dfp_set_FPRF_from_FRT(dfp); + dfp_check_for_XX(dfp); + dfp_check_for_VXSNAN(dfp); +} + +DFP_HELPER_RINT(drintx, RINTX_PPs, 64) +DFP_HELPER_RINT(drintxq, RINTX_PPs, 128) + +static void RINTN_PPs(struct PPC_DFP *dfp) +{ + dfp_set_FPRF_from_FRT(dfp); + dfp_check_for_VXSNAN(dfp); +} + +DFP_HELPER_RINT(drintn, RINTN_PPs, 64) +DFP_HELPER_RINT(drintnq, RINTN_PPs, 128) |