diff options
| author | Tom Musta <tommusta@gmail.com> | 2014-04-21 15:55:06 -0500 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-06-16 13:24:30 +0200 |
| commit | e601c1eead579b9a849dc4bfc2da2038cef361fd (patch) | |
| tree | 2d66e763d5e98df59ecdb5837a5a762aa7d898bb /target-ppc/dfp_helper.c | |
| parent | 5833505be64a27f8ae7a503d3f39b9d586b0d5f6 (diff) | |
target-ppc: Introduce DFP Test Data Class
Add emulation of the PowerPC Decimal Floating Point Test Data Class
instructions dtstdc[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 | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index 1816f4461e..fcd6fef5d3 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -421,3 +421,31 @@ static void CMPO_PPs(struct PPC_DFP *dfp) DFP_HELPER_BF_AB(dcmpo, decNumberCompare, CMPO_PPs, 64) DFP_HELPER_BF_AB(dcmpoq, decNumberCompare, CMPO_PPs, 128) + +#define DFP_HELPER_TSTDC(op, size) \ +uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint32_t dcm) \ +{ \ + struct PPC_DFP dfp; \ + int match = 0; \ + \ + dfp_prepare_decimal##size(&dfp, a, 0, env); \ + \ + match |= (dcm & 0x20) && decNumberIsZero(&dfp.a); \ + match |= (dcm & 0x10) && decNumberIsSubnormal(&dfp.a, &dfp.context); \ + match |= (dcm & 0x08) && decNumberIsNormal(&dfp.a, &dfp.context); \ + match |= (dcm & 0x04) && decNumberIsInfinite(&dfp.a); \ + match |= (dcm & 0x02) && decNumberIsQNaN(&dfp.a); \ + match |= (dcm & 0x01) && decNumberIsSNaN(&dfp.a); \ + \ + if (decNumberIsNegative(&dfp.a)) { \ + dfp.crbf = match ? 0xA : 0x8; \ + } else { \ + dfp.crbf = match ? 0x2 : 0x0; \ + } \ + \ + dfp_set_FPCC_from_CRBF(&dfp); \ + return dfp.crbf; \ +} + +DFP_HELPER_TSTDC(dtstdc, 64) +DFP_HELPER_TSTDC(dtstdcq, 128) |