@@ -294,6 +294,32 @@ static void dfp_check_for_VXIDI(struct PPC_DFP *dfp)
}
}
+static void dfp_check_for_VXVC(struct PPC_DFP *dfp)
+{
+ if (decNumberIsNaN(&dfp->a) || decNumberIsNaN(&dfp->b)) {
+ dfp_set_FPSCR_flag(dfp, FP_VX | FP_VXVC, FP_VE);
+ }
+}
+
+static void dfp_set_CRBF_from_T(struct PPC_DFP *dfp)
+{
+ if (decNumberIsNaN(&dfp->t)) {
+ dfp->crbf = 1;
+ } else if (decNumberIsZero(&dfp->t)) {
+ dfp->crbf = 2;
+ } else if (decNumberIsNegative(&dfp->t)) {
+ dfp->crbf = 8;
+ } else {
+ dfp->crbf = 4;
+ }
+}
+
+static void dfp_set_FPCC_from_CRBF(struct PPC_DFP *dfp)
+{
+ dfp->env->fpscr &= ~(0xF << 12);
+ dfp->env->fpscr |= (dfp->crbf << 12);
+}
+
static void dfp_run_post_processors(struct PPC_DFP *dfp,
PPC_DFP_PostProc post_processors[], const size_t n)
{
@@ -369,3 +395,33 @@ PPC_DFP_PostProc DIV_PPs[] = {
DFP_HELPER_TAB(ddiv, decNumberDivide, DIV_PPs, 64)
DFP_HELPER_TAB(ddivq, decNumberDivide, DIV_PPs, 128)
+
+#define DFP_HELPER_BF_AB(op, dnop, postprocs, size) \
+uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint64_t *b) \
+{ \
+ struct PPC_DFP dfp; \
+ dfp_prepare_decimal##size(&dfp, a, b, env); \
+ dnop(&dfp.t, &dfp.a, &dfp.b, &dfp.context); \
+ decimal##size##FromNumber((decimal##size *)dfp.t64, &dfp.t, &dfp.context); \
+ dfp_run_post_processors(&dfp, postprocs, ARRAY_SIZE(postprocs)); \
+ return dfp.crbf; \
+}
+
+PPC_DFP_PostProc CMPU_PPs[] = {
+ dfp_set_CRBF_from_T,
+ dfp_set_FPCC_from_CRBF,
+ dfp_check_for_VXSNAN,
+};
+
+DFP_HELPER_BF_AB(dcmpu, decNumberCompare, CMPU_PPs, 64)
+DFP_HELPER_BF_AB(dcmpuq, decNumberCompare, CMPU_PPs, 128)
+
+PPC_DFP_PostProc CMPO_PPs[] = {
+ dfp_set_CRBF_from_T,
+ dfp_set_FPCC_from_CRBF,
+ dfp_check_for_VXSNAN,
+ dfp_check_for_VXVC,
+};
+
+DFP_HELPER_BF_AB(dcmpo, decNumberCompare, CMPO_PPs, 64)
+DFP_HELPER_BF_AB(dcmpoq, decNumberCompare, CMPO_PPs, 128)
@@ -626,4 +626,8 @@ DEF_HELPER_4(dmul, void, env, fprp, fprp, fprp)
DEF_HELPER_4(dmulq, void, env, fprp, fprp, fprp)
DEF_HELPER_4(ddiv, void, env, fprp, fprp, fprp)
DEF_HELPER_4(ddivq, void, env, fprp, fprp, fprp)
+DEF_HELPER_3(dcmpo, i32, env, fprp, fprp)
+DEF_HELPER_3(dcmpoq, i32, env, fprp, fprp)
+DEF_HELPER_3(dcmpu, i32, env, fprp, fprp)
+DEF_HELPER_3(dcmpuq, i32, env, fprp, fprp)
#include "exec/def-helper.h"
@@ -8364,6 +8364,10 @@ GEN_DFP_T_A_B_Rc(dmul)
GEN_DFP_T_A_B_Rc(dmulq)
GEN_DFP_T_A_B_Rc(ddiv)
GEN_DFP_T_A_B_Rc(ddivq)
+GEN_DFP_BF_A_B(dcmpu)
+GEN_DFP_BF_A_B(dcmpuq)
+GEN_DFP_BF_A_B(dcmpo)
+GEN_DFP_BF_A_B(dcmpoq)
/*** SPE extension ***/
/* Register moves */
@@ -11299,6 +11303,10 @@ GEN_DFP_T_A_B_Rc(dmul, 0x02, 0x01),
GEN_DFP_Tp_Ap_Bp_Rc(dmulq, 0x02, 0x01),
GEN_DFP_T_A_B_Rc(ddiv, 0x02, 0x11),
GEN_DFP_Tp_Ap_Bp_Rc(ddivq, 0x02, 0x11),
+GEN_DFP_BF_A_B(dcmpu, 0x02, 0x14),
+GEN_DFP_BF_Ap_Bp(dcmpuq, 0x02, 0x14),
+GEN_DFP_BF_A_B(dcmpo, 0x02, 0x04),
+GEN_DFP_BF_Ap_Bp(dcmpoq, 0x02, 0x04),
#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 Decimal Floating Point Compare instructions dcmpu[q] and dcmpo[q]. Signed-off-by: Tom Musta <tommusta@gmail.com> --- target-ppc/dfp_helper.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++ target-ppc/helper.h | 4 +++ target-ppc/translate.c | 8 ++++++ 3 files changed, 68 insertions(+), 0 deletions(-)