authorgravatar for robin@voetter.nlRobin Voetter <robin@voetter.nl> 2021-05-16 14:55:09+02:00
committergravatar for robin@voetter.nlRobin Voetter <robin@voetter.nl> 2021-05-16 14:55:09+02:00
log880473dc3f08e2f8c0cef85777d50e25e4bcb062
tree7479e7ed6573a4552200503e79e8ee8a9a53d8a3
parent489b3ef7d47c877aa7e761ddf00763bfe1dc03a7

SPIR-V: Unary not operation

1 files changed, 21 insertions(+), 1 deletions(-)

src/codegen/spirv.zig+21-1
......@@ -453,6 +453,7 @@ pub const DeclGen = struct {
453453 .cmp_lte => try self.genBinOp(inst.castTag(.cmp_lte).?),
454454 .bool_and => try self.genBinOp(inst.castTag(.bool_and).?),
455455 .bool_or => try self.genBinOp(inst.castTag(.bool_or).?),
456 .not => try self.genUnOp(inst.castTag(.not).?),
456457 .arg => self.genArg(),
457458 // TODO: Breakpoints won't be supported in SPIR-V, but the compiler seems to insert them
458459 // throughout the IR.
......@@ -527,7 +528,7 @@ pub const DeclGen = struct {
527528 try writeInstruction(&self.spv.fn_decls, opcode, &[_]u32{ result_type_id, result_id, lhs_id, rhs_id });
528529
529530 // TODO: Trap on overflow? Probably going to be annoying.
530 // TODO: Look into NoSignedWrap/NoUnsignedWrap extensions.
531 // TODO: Look into SPV_KHR_no_integer_wrap_decoration which provides NoSignedWrap/NoUnsignedWrap.
531532
532533 if (info.class != .strange_integer)
533534 return result_id;
......@@ -535,6 +536,25 @@ pub const DeclGen = struct {
535536 return self.fail(.{.node_offset = 0}, "TODO: SPIR-V backend: strange integer operation mask", .{});
536537 }
537538
539 fn genUnOp(self: *DeclGen, inst: *Inst.UnOp) !u32 {
540 const operand_id = try self.resolve(inst.operand);
541
542 const result_id = self.spv.allocResultId();
543 const result_type_id = try self.getOrGenType(inst.base.ty);
544
545 const info = try self.arithmeticTypeInfo(inst.operand.ty);
546
547 const opcode = switch (inst.base.tag) {
548 // Bool -> bool
549 .not => Opcode.OpLogicalNot,
550 else => unreachable,
551 };
552
553 try writeInstruction(&self.spv.fn_decls, opcode, &[_]u32{ result_type_id, result_id, operand_id });
554
555 return result_id;
556 }
557
538558 fn genArg(self: *DeclGen) u32 {
539559 defer self.next_arg_index += 1;
540560 return self.args.items[self.next_arg_index];