diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:02 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:30 +0200 |
| commit | 2128f8a57e1f1db97b8ba03eae4d8e5d94bf1ea5 (patch) | |
| tree | a62e3c75ff83d9cc9590020140732d7507d2a50f | |
| parent | a9d7ba03b0fa8c7b6d660c6aafa736d16921728f (diff) | |
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>
| -rw-r--r-- | target-ppc/dfp_helper.c | 18 | ||||
| -rw-r--r-- | target-ppc/helper.h | 2 | ||||
| -rw-r--r-- | target-ppc/translate.c | 5 |
3 files changed, 24 insertions, 1 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 9f4cd3321c..d6d0c2dc70 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -256,6 +256,11 @@ static void dfp_check_for_VXISI_add(struct PPC_DFP *dfp) 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 @@ static void ADD_PPs(struct PPC_DFP *dfp) 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 99e61984cc..d560e532d9 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -618,3 +618,5 @@ DEF_HELPER_3(store_601_batu, void, env, i32, tl) 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 9397a6b717..e1075d5a66 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -8358,7 +8358,8 @@ static void gen_##name(DisasContext *ctx) \ 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_QUADx2(name, op1, op2, 0x00210000) 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) |