target-ppc: Introduce DFP Subtract Add emulation of the PowerPC Decimal Floating Point Subtract instructions dsub[q][.] Signed-off-by: Tom Musta <tommusta@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 9f4cd33..d6d0c2d 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c
@@ -256,6 +256,11 @@ dfp_check_for_VXISI(dfp, 0); } +static void dfp_check_for_VXISI_subtract(struct PPC_DFP *dfp) +{ + dfp_check_for_VXISI(dfp, 1); +} + #define DFP_HELPER_TAB(op, dnop, postprocs, size) \ void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *a, uint64_t *b) \ { \ @@ -284,3 +289,16 @@ DFP_HELPER_TAB(dadd, decNumberAdd, ADD_PPs, 64) DFP_HELPER_TAB(daddq, decNumberAdd, ADD_PPs, 128) + +static void SUB_PPs(struct PPC_DFP *dfp) +{ + dfp_set_FPRF_from_FRT(dfp); + dfp_check_for_OX(dfp); + dfp_check_for_UX(dfp); + dfp_check_for_XX(dfp); + dfp_check_for_VXSNAN(dfp); + dfp_check_for_VXISI_subtract(dfp); +} + +DFP_HELPER_TAB(dsub, decNumberSubtract, SUB_PPs, 64) +DFP_HELPER_TAB(dsubq, decNumberSubtract, SUB_PPs, 128)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 99e6198..d560e53 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h
@@ -618,3 +618,5 @@ DEF_HELPER_4(dadd, void, env, fprp, fprp, fprp) DEF_HELPER_4(daddq, void, env, fprp, fprp, fprp) +DEF_HELPER_4(dsub, void, env, fprp, fprp, fprp) +DEF_HELPER_4(dsubq, void, env, fprp, fprp, fprp)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 9397a6b..e1075d5 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c
@@ -8358,7 +8358,8 @@ GEN_DFP_T_A_B_Rc(dadd) GEN_DFP_T_A_B_Rc(daddq) - +GEN_DFP_T_A_B_Rc(dsub) +GEN_DFP_T_A_B_Rc(dsubq) /*** SPE extension ***/ /* Register moves */ @@ -11288,6 +11289,8 @@ GEN_DFP_T_A_B_Rc(dadd, 0x02, 0x00), GEN_DFP_Tp_Ap_Bp_Rc(daddq, 0x02, 0x00), +GEN_DFP_T_A_B_Rc(dsub, 0x02, 0x10), +GEN_DFP_Tp_Ap_Bp_Rc(dsubq, 0x02, 0x10), #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)