From 9024ff40ba79f77b027fb3cbfe584e0005128193 Mon Sep 17 00:00:00 2001 From: Tom Musta Date: Mon, 21 Apr 2014 15:55:04 -0500 Subject: target-ppc: Introduce DFP Divide Add emulation of the PowerPC Decimal Floating Point Divide instructions ddiv[q][.] Signed-off-by: Tom Musta Signed-off-by: Alexander Graf --- target-ppc/dfp_helper.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'target-ppc/dfp_helper.c') diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index e6c1098..2dca9d4 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -229,6 +229,13 @@ static void dfp_check_for_XX(struct PPC_DFP *dfp) } } +static void dfp_check_for_ZX(struct PPC_DFP *dfp) +{ + if (dfp->context.status & DEC_Division_by_zero) { + dfp_set_FPSCR_flag(dfp, FP_ZX, FP_ZE); + } +} + static void dfp_check_for_VXSNAN(struct PPC_DFP *dfp) { if (dfp->context.status & DEC_Invalid_operation) { @@ -271,6 +278,22 @@ static void dfp_check_for_VXIMZ(struct PPC_DFP *dfp) } } +static void dfp_check_for_VXZDZ(struct PPC_DFP *dfp) +{ + if (dfp->context.status & DEC_Division_undefined) { + dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXZDZ, FP_VE); + } +} + +static void dfp_check_for_VXIDI(struct PPC_DFP *dfp) +{ + if (dfp->context.status & DEC_Invalid_operation) { + if (decNumberIsInfinite(&dfp->a) && decNumberIsInfinite(&dfp->b)) { + dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXIDI, FP_VE); + } + } +} + #define DFP_HELPER_TAB(op, dnop, postprocs, size) \ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, uint64_t *b) \ { \ @@ -325,3 +348,18 @@ static void MUL_PPs(struct PPC_DFP *dfp) DFP_HELPER_TAB(dmul, decNumberMultiply, MUL_PPs, 64) DFP_HELPER_TAB(dmulq, decNumberMultiply, MUL_PPs, 128) + +static void DIV_PPs(struct PPC_DFP *dfp) +{ + dfp_set_FPRF_from_FRT(dfp); + dfp_check_for_OX(dfp); + dfp_check_for_UX(dfp); + dfp_check_for_ZX(dfp); + dfp_check_for_XX(dfp); + dfp_check_for_VXSNAN(dfp); + dfp_check_for_VXZDZ(dfp); + dfp_check_for_VXIDI(dfp); +} + +DFP_HELPER_TAB(ddiv, decNumberDivide, DIV_PPs, 64) +DFP_HELPER_TAB(ddivq, decNumberDivide, DIV_PPs, 128) -- cgit v1.1