diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:16 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:32 +0200 |
| commit | bea0dd7912ee91c0219f143db7bb8350fade98c4 (patch) | |
| tree | a0a2b5f1bdd7c1c46f0c698c84ec54a3ae09a62e /target-ppc/dfp_helper.c | |
| parent | f12141935512fd8e5de1ecbb6494be86ec8880a5 (diff) | |
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>
Diffstat (limited to 'target-ppc/dfp_helper.c')
| -rw-r--r-- | target-ppc/dfp_helper.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 41f87e070f..24de5a7770 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -947,3 +947,39 @@ static void CFFIX_PPs(struct PPC_DFP *dfp) 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) |