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target-ppc: Introduce DFP Convert to Fixed

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Add emulation of the PowerPC Decimal Floating Point Convert to
Fixed instructions dctfix[q][.].

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-04-21 15:55:15 -05:00 committed by Alexander Graf
parent ca603eb4d7
commit f121419355
3 changed files with 32 additions and 0 deletions
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26
target-ppc/dfp_helper.c
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@ -921,3 +921,29 @@ void helper_drdpq(CPUPPCState *env, uint64_t *t, uint64_t *b)
t[0] = dfp.t64[0];
t[1] = 0;
}
#define DFP_HELPER_CFFIX(op, size) \
void helper_##op(CPUPPCState *env, uint64_t *t, uint64_t *b) \
{ \
struct PPC_DFP dfp; \
dfp_prepare_decimal##size(&dfp, 0, b, env); \
decNumberFromInt64(&dfp.t, (int64_t)(*b)); \
decimal##size##FromNumber((decimal##size *)dfp.t64, &dfp.t, &dfp.context); \
CFFIX_PPs(&dfp); \
\
if (size == 64) { \
t[0] = dfp.t64[0]; \
} else if (size == 128) { \
t[0] = dfp.t64[HI_IDX]; \
t[1] = dfp.t64[LO_IDX]; \
} \
}
static void CFFIX_PPs(struct PPC_DFP *dfp)
{
dfp_set_FPRF_from_FRT(dfp);
dfp_check_for_XX(dfp);
}
DFP_HELPER_CFFIX(dcffix, 64)
DFP_HELPER_CFFIX(dcffixq, 128)

2
target-ppc/helper.h
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@ -650,3 +650,5 @@ 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)
DEF_HELPER_3(dcffix, void, env, fprp, fprp)
DEF_HELPER_3(dcffixq, void, env, fprp, fprp)

4
target-ppc/translate.c
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@ -8390,6 +8390,8 @@ GEN_DFP_T_B_Rc(dctdp)
GEN_DFP_T_B_Rc(dctqpq)
GEN_DFP_T_B_Rc(drsp)
GEN_DFP_T_B_Rc(drdpq)
GEN_DFP_T_B_Rc(dcffix)
GEN_DFP_T_B_Rc(dcffixq)
/*** SPE extension ***/
/* Register moves */
@ -11351,6 +11353,8 @@ 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),
GEN_DFP_T_B_Rc(dcffix, 0x02, 0x19),
GEN_DFP_Tp_B_Rc(dcffixq, 0x02, 0x19),
#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)