From deb6b8e1b6fc2543ff27f8d0c75789733374a2c1 Mon Sep 17 00:00:00 2001 From: lemon Date: Tue, 30 Aug 2022 11:21:24 +0200 Subject: bitfield initializers --- src/llvm.cff | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'src/llvm.cff') diff --git a/src/llvm.cff b/src/llvm.cff index 97d1e3c..1a3bfef 100644 --- a/src/llvm.cff +++ b/src/llvm.cff @@ -933,6 +933,20 @@ fn genexpr(f *Fn, ex *Expr) Value { gen("\t%v = load %t, %t %v\n", &val, ty, tmp.ty, &tmp); return val; + case BitFIni ini; + assert(ex.ty->is(:BitF), "not bitf bitf ini"); + + let intty = ex.ty.u.BitF.intty; + let tmp = gentmp(ex.ty, "bitcast %t 0 to %t", ex.ty, ex.ty); + foreach(fld, i, ini.flds) { + let ex0 = convert(f, intty, &ini.exs[i]); + let fmask = fld.size == 64 ? ~0u64 : ((1u64 << fld.size) - 1); + let masked = gentmp(intty, "and %t %v, %I", intty, &ex0, fmask); + let shifted = gentmp(intty, "shl %t %v, %d", intty, &masked, fld.off); + tmp = gentmp(ex.ty, "or %t %v, %v", intty, &tmp, &shifted); + } + return tmp; + case EUnionIni ini; let t0 = mktmp(mkptrtype(ex.ty)); let vidx = ini.var - ex.ty.u.Agg.flds.#ptr; -- cgit v1.2.3