@@ -247,6 +247,20 @@ 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) {
@@ -870,3 +884,37 @@ void helper_dctqpq(CPUPPCState *env, uint64_t *t, uint64_t *b)
t[0] = dfp.t64[HI_IDX];
t[1] = dfp.t64[LO_IDX];
}
+
+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_set_FPRF_from_FRT_short(&dfp);
+ dfp_check_for_OX(&dfp);
+ dfp_check_for_UX(&dfp);
+ dfp_check_for_XX(&dfp);
+
+ *t = t_short;
+}
+
+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_check_for_VXSNAN_and_convert_to_QNaN(&dfp);
+ dfp_set_FPRF_from_FRT_long(&dfp);
+ dfp_check_for_OX(&dfp);
+ dfp_check_for_UX(&dfp);
+ dfp_check_for_XX(&dfp);
+
+ decimal64FromNumber((decimal64 *)dfp.t64, &dfp.t, &dfp.context);
+ t[0] = dfp.t64[0];
+ t[1] = 0;
+}
@@ -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"
@@ -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)
Add emulation of the PowerPC Round to DFP Short (drsp[.]) and Round to DFP Long (drdpq[.]) instructions. Signed-off-by: Tom Musta <tommusta@gmail.com> --- V2: Modify post-processor handling per Richard Henderson's review. target-ppc/dfp_helper.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++ target-ppc/helper.h | 2 + target-ppc/translate.c | 4 +++ 3 files changed, 54 insertions(+), 0 deletions(-)