diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:13 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:31 +0200 |
| commit | 290d9ee53790f67528b0d48865c93cc045c1eece (patch) | |
| tree | bff2d49601e2227ae587917b5a6cf9b59edfaa5b | |
| parent | 97c0d93041857cf64ceddbf59f37cf396af7fe21 (diff) | |
target-ppc: Introduce DFP Convert to Long/Extended
Add emulation of the PowerPC Convert to DFP Long (dctdp[.]) and
Convert to DFP Extended (dctqpq[.]) instructions.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | target-ppc/dfp_helper.c | 33 | ||||
| -rw-r--r-- | target-ppc/helper.h | 2 | ||||
| -rw-r--r-- | target-ppc/translate.c | 4 |
3 files changed, 39 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 243ed8908c..050a339f1d 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -286,6 +286,15 @@ static void dfp_check_for_VXSNAN(struct PPC_DFP *dfp) } } +static void dfp_check_for_VXSNAN_and_convert_to_QNaN(struct PPC_DFP *dfp) +{ + if (decNumberIsSNaN(&dfp->t)) { + dfp->t.bits &= ~DECSNAN; + dfp->t.bits |= DECNAN; + dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXSNAN, FP_VE); + } +} + static void dfp_check_for_VXISI(struct PPC_DFP *dfp, int testForSameSign) { if (dfp->context.status & DEC_Invalid_operation) { @@ -840,3 +849,27 @@ static void RINTN_PPs(struct PPC_DFP *dfp) DFP_HELPER_RINT(drintn, RINTN_PPs, 64) DFP_HELPER_RINT(drintnq, RINTN_PPs, 128) + +void helper_dctdp(CPUPPCState *env, uint64_t *t, uint64_t *b) +{ + struct PPC_DFP dfp; + uint32_t b_short = *b; + dfp_prepare_decimal64(&dfp, 0, 0, env); + decimal32ToNumber((decimal32 *)&b_short, &dfp.t); + decimal64FromNumber((decimal64 *)t, &dfp.t, &dfp.context); + dfp_set_FPRF_from_FRT(&dfp); +} + +void helper_dctqpq(CPUPPCState *env, uint64_t *t, uint64_t *b) +{ + struct PPC_DFP dfp; + dfp_prepare_decimal128(&dfp, 0, 0, env); + decimal64ToNumber((decimal64 *)b, &dfp.t); + + dfp_check_for_VXSNAN_and_convert_to_QNaN(&dfp); + dfp_set_FPRF_from_FRT(&dfp); + + decimal128FromNumber((decimal128 *)&dfp.t64, &dfp.t, &dfp.context); + t[0] = dfp.t64[HI_IDX]; + t[1] = dfp.t64[LO_IDX]; +} diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 3569827990..c7dbb1979f 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -646,3 +646,5 @@ DEF_HELPER_5(drintx, void, env, fprp, fprp, i32, i32) DEF_HELPER_5(drintxq, void, env, fprp, fprp, i32, i32) 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) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 4a3c8183bd..c62c583cee 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -8386,6 +8386,8 @@ GEN_DFP_T_B_U32_U32_Rc(drintx, FPW, RMC) GEN_DFP_T_B_U32_U32_Rc(drintxq, FPW, RMC) 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) /*** SPE extension ***/ /* Register moves */ @@ -11343,6 +11345,8 @@ GEN_DFP_R_T_B_RMC_Rc(drintx, 0x03, 0x03), GEN_DFP_R_Tp_Bp_RMC_Rc(drintxq, 0x03, 0x03), 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), #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) |