diff options
| author | Bor Grošelj Simić <[email protected]> | 2022-01-28 02:06:18 +0100 |
|---|---|---|
| committer | Quentin Carbonneaux <[email protected]> | 2022-01-28 09:24:15 +0100 |
| commit | 3964574a8325ab802f98856195b8214dcce3124c (patch) | |
| tree | 0ac6128a201088b186d642b990a02c6e78cf715a /amd64 | |
| parent | 74d022f975f22fda20c0d1fe09a3f6fc7680f64f (diff) | |
implement float -> unsigned casts
amd64 lacks instruction for this so it has to be implemented with
float -> signed casts. The approach is borrowed from llvm.
Diffstat (limited to 'amd64')
| -rw-r--r-- | amd64/isel.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/amd64/isel.c b/amd64/isel.c index 17ab86d..570bff6 100644 --- a/amd64/isel.c +++ b/amd64/isel.c @@ -307,6 +307,32 @@ sel(Ins i, ANum *an, Fn *fn) emit(Oand, Kl, tmp[0], i.arg[0], getcon(1, fn)); fixarg(&curi->arg[0], Kl, curi, fn); break; + case Ostoui: + i.op = Ostosi; + r0 = newtmp("ftou", Ks, fn); + goto Oftoui; + case Odtoui: + i.op = Odtosi; + r0 = newtmp("ftou", Kd, fn); + Oftoui: + if (k == Kw) { + goto Emit; + } + for (j=0; j<4; j++) + tmp[j] = newtmp("ftou", Kl, fn); + emit(Oor, Kl, i.to, tmp[0], tmp[3]); + emit(Oand, Kl, tmp[3], tmp[2], tmp[1]); + emit(i.op, Kl, tmp[2], r0, R); + if (i.op == Ostosi) + emit(Oadd, Ks, r0, getcon(0xdf000000, fn), i.arg[0]); + else + emit(Oadd, Kd, r0, getcon(0xc3e0000000000000, fn), i.arg[0]); + i1 = curi; + fixarg(&i1->arg[0], i.op == Ostosi ? Ks : Kd, i1, fn); + fixarg(&i1->arg[1], i.op == Ostosi ? Ks : Kd, i1, fn); + emit(Osar, Kl, tmp[1], tmp[0], getcon(63, fn)); + emit(i.op, Kl, tmp[0], i.arg[0], R); + fixarg(&curi->arg[0], Kl, curi, fn); case Onop: break; case Ostored: |