Add emulation of the PowerPC Round to DFP Short (drsp[.]) and Round to DFP Long (drdpq[.]) instructions.
Signed-off-by: Tom Musta <tommu...@gmail.com> --- target-ppc/dfp_helper.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++ target-ppc/helper.h | 2 + target-ppc/translate.c | 4 +++ 3 files changed, 58 insertions(+), 0 deletions(-) diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index a719797..25afaba 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -249,6 +249,20 @@ static void dfp_set_FPRF_from_FRT(struct PPC_DFP *dfp) dfp_set_FPRF_from_FRT_with_context(dfp, &dfp->context); } +static void dfp_set_FPRF_from_FRT_short(struct PPC_DFP *dfp) +{ + decContext shortContext; + decContextDefault(&shortContext, DEC_INIT_DECIMAL32); + dfp_set_FPRF_from_FRT_with_context(dfp, &shortContext); +} + +static void dfp_set_FPRF_from_FRT_long(struct PPC_DFP *dfp) +{ + decContext longContext; + decContextDefault(&longContext, DEC_INIT_DECIMAL64); + dfp_set_FPRF_from_FRT_with_context(dfp, &longContext); +} + static void dfp_check_for_OX(struct PPC_DFP *dfp) { if (dfp->context.status & DEC_Overflow) { @@ -880,3 +894,41 @@ void helper_dctqpq(CPUPPCState *env, uint64_t *t, uint64_t *b) t[0] = dfp.t64[HI_IDX]; t[1] = dfp.t64[LO_IDX]; } + +PPC_DFP_PostProc RSP_PPs[] = { + dfp_set_FPRF_from_FRT_short, + dfp_check_for_OX, + dfp_check_for_UX, + dfp_check_for_XX, +}; + +void helper_drsp(CPUPPCState *env, uint64_t *t, uint64_t *b) +{ + struct PPC_DFP dfp; + uint32_t t_short = 0; + dfp_prepare_decimal64(&dfp, 0, b, env); + decimal32FromNumber((decimal32 *)&t_short, &dfp.b, &dfp.context); + decimal32ToNumber((decimal32 *)&t_short, &dfp.t); + dfp_run_post_processors(&dfp, RSP_PPs, ARRAY_SIZE(RSP_PPs)); + *t = t_short; +} + +PPC_DFP_PostProc RDPQ_PPs[] = { + dfp_check_for_VXSNAN_and_convert_to_QNaN, + dfp_set_FPRF_from_FRT_long, + dfp_check_for_OX, + dfp_check_for_UX, + dfp_check_for_XX, +}; + +void helper_drdpq(CPUPPCState *env, uint64_t *t, uint64_t *b) +{ + struct PPC_DFP dfp; + dfp_prepare_decimal128(&dfp, 0, b, env); + decimal64FromNumber((decimal64 *)&dfp.t64, &dfp.b, &dfp.context); + decimal64ToNumber((decimal64 *)&dfp.t64, &dfp.t); + dfp_run_post_processors(&dfp, RDPQ_PPs, ARRAY_SIZE(RDPQ_PPs)); + decimal64FromNumber((decimal64 *)dfp.t64, &dfp.t, &dfp.context); + t[0] = dfp.t64[0]; + t[1] = 0; +} diff --git a/target-ppc/helper.h b/target-ppc/helper.h index a99ca1c..d9ef8f6 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -650,4 +650,6 @@ DEF_HELPER_5(drintn, void, env, fprp, fprp, i32, i32) DEF_HELPER_5(drintnq, void, env, fprp, fprp, i32, i32) DEF_HELPER_3(dctdp, void, env, fprp, fprp) DEF_HELPER_3(dctqpq, void, env, fprp, fprp) +DEF_HELPER_3(drsp, void, env, fprp, fprp) +DEF_HELPER_3(drdpq, void, env, fprp, fprp) #include "exec/def-helper.h" diff --git a/target-ppc/translate.c b/target-ppc/translate.c index da70c8d..391f55d 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -8388,6 +8388,8 @@ GEN_DFP_T_B_U32_U32_Rc(drintn, FPW, RMC) GEN_DFP_T_B_U32_U32_Rc(drintnq, FPW, RMC) GEN_DFP_T_B_Rc(dctdp) GEN_DFP_T_B_Rc(dctqpq) +GEN_DFP_T_B_Rc(drsp) +GEN_DFP_T_B_Rc(drdpq) /*** SPE extension ***/ /* Register moves */ @@ -11347,6 +11349,8 @@ GEN_DFP_R_T_B_RMC_Rc(drintn, 0x03, 0x07), GEN_DFP_R_Tp_Bp_RMC_Rc(drintnq, 0x03, 0x07), GEN_DFP_T_B_Rc(dctdp, 0x02, 0x08), GEN_DFP_Tp_B_Rc(dctqpq, 0x02, 0x08), +GEN_DFP_T_B_Rc(drsp, 0x02, 0x18), +GEN_DFP_Tp_Bp_Rc(drdpq, 0x02, 0x18), #undef GEN_SPE #define GEN_SPE(name0, name1, opc2, opc3, inval0, inval1, type) \ GEN_OPCODE_DUAL(name0##_##name1, 0x04, opc2, opc3, inval0, inval1, type, PPC_NONE) -- 1.7.1