diff options
Diffstat (limited to 'target-ppc/dfp_helper.c')
| -rw-r--r-- | target-ppc/dfp_helper.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 2dca9d4b1d..1816f4461e 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -294,6 +294,32 @@ static void dfp_check_for_VXIDI(struct PPC_DFP *dfp) } } +static void dfp_check_for_VXVC(struct PPC_DFP *dfp) +{ + if (decNumberIsNaN(&dfp->a) || decNumberIsNaN(&dfp->b)) { + dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXVC, FP_VE); + } +} + +static void dfp_set_CRBF_from_T(struct PPC_DFP *dfp) +{ + if (decNumberIsNaN(&dfp->t)) { + dfp->crbf = 1; + } else if (decNumberIsZero(&dfp->t)) { + dfp->crbf = 2; + } else if (decNumberIsNegative(&dfp->t)) { + dfp->crbf = 8; + } else { + dfp->crbf = 4; + } +} + +static void dfp_set_FPCC_from_CRBF(struct PPC_DFP *dfp) +{ + dfp->env->fpscr &= ~(0xF << 12); + dfp->env->fpscr |= (dfp->crbf << 12); +} + #define DFP_HELPER_TAB(op, dnop, postprocs, size) \ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, uint64_t *b) \ { \ @@ -363,3 +389,35 @@ static void DIV_PPs(struct PPC_DFP *dfp) DFP_HELPER_TAB(ddiv, decNumberDivide, DIV_PPs, 64) DFP_HELPER_TAB(ddivq, decNumberDivide, DIV_PPs, 128) + +#define DFP_HELPER_BF_AB(op, dnop, postprocs, size) \ +uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint64_t *b) \ +{ \ + struct PPC_DFP dfp; \ + dfp_prepare_decimal##size(&dfp, a, b, env); \ + dnop(&dfp.t, &dfp.a, &dfp.b, &dfp.context); \ + decimal##size##FromNumber((decimal##size *)dfp.t64, &dfp.t, &dfp.context); \ + postprocs(&dfp); \ + return dfp.crbf; \ +} + +static void CMPU_PPs(struct PPC_DFP *dfp) +{ + dfp_set_CRBF_from_T(dfp); + dfp_set_FPCC_from_CRBF(dfp); + dfp_check_for_VXSNAN(dfp); +} + +DFP_HELPER_BF_AB(dcmpu, decNumberCompare, CMPU_PPs, 64) +DFP_HELPER_BF_AB(dcmpuq, decNumberCompare, CMPU_PPs, 128) + +static void CMPO_PPs(struct PPC_DFP *dfp) +{ + dfp_set_CRBF_from_T(dfp); + dfp_set_FPCC_from_CRBF(dfp); + dfp_check_for_VXSNAN(dfp); + dfp_check_for_VXVC(dfp); +} + +DFP_HELPER_BF_AB(dcmpo, decNumberCompare, CMPO_PPs, 64) +DFP_HELPER_BF_AB(dcmpoq, decNumberCompare, CMPO_PPs, 128) |