diff options
Diffstat (limited to 'target-ppc/dfp_helper.c')
| -rw-r--r-- | target-ppc/dfp_helper.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 43eb70d964..574956a19f 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -536,3 +536,38 @@ uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint64_t *b) \ DFP_HELPER_TSTEX(dtstex, 64) DFP_HELPER_TSTEX(dtstexq, 128) + +#define DFP_HELPER_TSTSF(op, size) \ +uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint64_t *b) \ +{ \ + struct PPC_DFP dfp; \ + unsigned k; \ + \ + dfp_prepare_decimal##size(&dfp, 0, b, env); \ + \ + k = *a & 0x3F; \ + \ + if (unlikely(decNumberIsSpecial(&dfp.b))) { \ + dfp.crbf = 1; \ + } else if (k == 0) { \ + dfp.crbf = 4; \ + } else if (unlikely(decNumberIsZero(&dfp.b))) { \ + /* Zero has no sig digits */ \ + dfp.crbf = 4; \ + } else { \ + unsigned nsd = dfp.b.digits; \ + if (k < nsd) { \ + dfp.crbf = 8; \ + } else if (k > nsd) { \ + dfp.crbf = 4; \ + } else { \ + dfp.crbf = 2; \ + } \ + } \ + \ + dfp_set_FPCC_from_CRBF(&dfp); \ + return dfp.crbf; \ +} + +DFP_HELPER_TSTSF(dtstsf, 64) +DFP_HELPER_TSTSF(dtstsfq, 128) |