From 1a6fba89dc9b918d99c52478061e5e79c7b3d1e7 Mon Sep 17 00:00:00 2001 From: Luke Kenneth Casson Leighton Date: Thu, 21 Dec 2023 16:33:34 +0000 Subject: [PATCH] bug 676: although spotted under maxloc, sv.mcrf was incomplete https://bugs.libre-soc.org/show_bug.cgi?id=1239 BF was "vectorised" (through a rewrite of the immediate field) but BFA was not. a *lot* more unit tests are needed for ISACaller to be "up to spec" --- src/openpower/decoder/isa/caller.py | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/src/openpower/decoder/isa/caller.py b/src/openpower/decoder/isa/caller.py index 7ed040e2..c6f255ba 100644 --- a/src/openpower/decoder/isa/caller.py +++ b/src/openpower/decoder/isa/caller.py @@ -427,13 +427,15 @@ def _get_predcr(mask): # read individual CR fields (0..VL-1), extract the required bit # and construct the mask -def get_predcr(crl, mask, vl): - idx, noninv = _get_predcr(mask) +def get_predcr(crl, predselect, vl): + idx, noninv = _get_predcr(predselect) mask = 0 for i in range(vl): cr = crl[i+SVP64CROffs.CRPred] if cr[idx].value == noninv: mask |= (1 << i) + log("get_predcr", vl, idx, noninv, i+SVP64CROffs.CRPred, + bin(cr.asint()), cr[idx].value, bin(mask)) return mask @@ -560,6 +562,9 @@ def get_cr_in(dec2, name): if name == 'BI': if in_sel == CRInSel.BI.value: return in1, cr_isvec + if name == 'BFA': + if in_sel == CRInSel.BFA.value: + return in1, cr_isvec log("get_cr_in not found", name) return None, False @@ -1642,6 +1647,10 @@ class ISACaller(ISACallerHelper, ISAFPHelpers, StepLoop): # low 2 LSBs (CR field selector) remain same, CR num extended assert regnum <= 7, "sigh, TODO, 128 CR fields" val = (val & 0b11) | (regnum << 2) + elif self.is_svp64_mode and name in ['BFA']: # TODO, more CRs + regnum, is_vec = yield from get_cr_in(self.dec2, name) + log('hack %s' % name, regnum, is_vec) + val = regnum elif self.is_svp64_mode and name in ['BF']: # TODO, more CRs regnum, is_vec = yield from get_cr_out(self.dec2, "BF") log('hack %s' % name, regnum, is_vec) -- 2.30.2