target-ppc: Introduce DFP Convert to Fixed
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>
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c
index 41f87e0..24de5a7 100644
--- a/target-ppc/dfp_helper.c
+++ b/target-ppc/dfp_helper.c
@@ -947,3 +947,39 @@
DFP_HELPER_CFFIX(dcffix, 64)
DFP_HELPER_CFFIX(dcffixq, 128)
+
+#define DFP_HELPER_CTFIX(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); \
+ \
+ if (unlikely(decNumberIsSpecial(&dfp.b))) { \
+ uint64_t invalid_flags = FP_VX | FP_VXCVI; \
+ if (decNumberIsInfinite(&dfp.b)) { \
+ dfp.t64[0] = decNumberIsNegative(&dfp.b) ? INT64_MIN : INT64_MAX; \
+ } else { /* NaN */ \
+ dfp.t64[0] = INT64_MIN; \
+ if (decNumberIsSNaN(&dfp.b)) { \
+ invalid_flags |= FP_VXSNAN; \
+ } \
+ } \
+ dfp_set_FPSCR_flag(&dfp, invalid_flags, FP_VE); \
+ } else if (unlikely(decNumberIsZero(&dfp.b))) { \
+ dfp.t64[0] = 0; \
+ } else { \
+ decNumberToIntegralExact(&dfp.b, &dfp.b, &dfp.context); \
+ dfp.t64[0] = decNumberIntegralToInt64(&dfp.b, &dfp.context); \
+ if (decContextTestStatus(&dfp.context, DEC_Invalid_operation)) { \
+ dfp.t64[0] = decNumberIsNegative(&dfp.b) ? INT64_MIN : INT64_MAX; \
+ dfp_set_FPSCR_flag(&dfp, FP_VX | FP_VXCVI, FP_VE); \
+ } else { \
+ dfp_check_for_XX(&dfp); \
+ } \
+ } \
+ \
+ *t = dfp.t64[0]; \
+}
+
+DFP_HELPER_CTFIX(dctfix, 64)
+DFP_HELPER_CTFIX(dctfixq, 128)
