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stage2 tzir: Add wrapping integer arithmetic instructions

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joachimschmidt557 2021-03-07 00:25:21 +01:00 committed by Andrew Kelley
parent b1a22fdbab
commit bdb917006c
4 changed files with 49 additions and 4 deletions
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30
src/codegen.zig
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@ -865,6 +865,7 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
fn genFuncInst(self: *Self, inst: *ir.Inst) !MCValue {
switch (inst.tag) {
.add => return self.genAdd(inst.castTag(.add).?),
.addwrap => return self.genAddWrap(inst.castTag(.addwrap).?),
.alloc => return self.genAlloc(inst.castTag(.alloc).?),
.arg => return self.genArg(inst.castTag(.arg).?),
.assembly => return self.genAsm(inst.castTag(.assembly).?),
@ -900,12 +901,14 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
.loop => return self.genLoop(inst.castTag(.loop).?),
.not => return self.genNot(inst.castTag(.not).?),
.mul => return self.genMul(inst.castTag(.mul).?),
.mulwrap => return self.genMulWrap(inst.castTag(.mulwrap).?),
.ptrtoint => return self.genPtrToInt(inst.castTag(.ptrtoint).?),
.ref => return self.genRef(inst.castTag(.ref).?),
.ret => return self.genRet(inst.castTag(.ret).?),
.retvoid => return self.genRetVoid(inst.castTag(.retvoid).?),
.store => return self.genStore(inst.castTag(.store).?),
.sub => return self.genSub(inst.castTag(.sub).?),
.subwrap => return self.genSubWrap(inst.castTag(.subwrap).?),
.switchbr => return self.genSwitch(inst.castTag(.switchbr).?),
.unreach => return MCValue{ .unreach = {} },
.optional_payload => return self.genOptionalPayload(inst.castTag(.optional_payload).?),
@ -1129,6 +1132,15 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
}
}
fn genAddWrap(self: *Self, inst: *ir.Inst.BinOp) !MCValue {
// No side effects, so if it's unreferenced, do nothing.
if (inst.base.isUnused())
return MCValue.dead;
switch (arch) {
else => return self.fail(inst.base.src, "TODO implement addwrap for {}", .{self.target.cpu.arch}),
}
}
fn genMul(self: *Self, inst: *ir.Inst.BinOp) !MCValue {
// No side effects, so if it's unreferenced, do nothing.
if (inst.base.isUnused())
@ -1139,6 +1151,15 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
}
}
fn genMulWrap(self: *Self, inst: *ir.Inst.BinOp) !MCValue {
// No side effects, so if it's unreferenced, do nothing.
if (inst.base.isUnused())
return MCValue.dead;
switch (arch) {
else => return self.fail(inst.base.src, "TODO implement mulwrap for {}", .{self.target.cpu.arch}),
}
}
fn genBitAnd(self: *Self, inst: *ir.Inst.BinOp) !MCValue {
// No side effects, so if it's unreferenced, do nothing.
if (inst.base.isUnused())
@ -1392,6 +1413,15 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
}
}
fn genSubWrap(self: *Self, inst: *ir.Inst.BinOp) !MCValue {
// No side effects, so if it's unreferenced, do nothing.
if (inst.base.isUnused())
return MCValue.dead;
switch (arch) {
else => return self.fail(inst.base.src, "TODO implement subwrap for {}", .{self.target.cpu.arch}),
}
}
fn genArmBinOp(self: *Self, inst: *ir.Inst, op_lhs: *ir.Inst, op_rhs: *ir.Inst, op: ir.Inst.Tag) !MCValue {
const lhs = try self.resolveInst(op_lhs);
const rhs = try self.resolveInst(op_rhs);

6
src/ir.zig
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@ -53,6 +53,7 @@ pub const Inst = struct {
pub const Tag = enum {
add,
addwrap,
alloc,
arg,
assembly,
@ -105,8 +106,10 @@ pub const Inst = struct {
/// Write a value to a pointer. LHS is pointer, RHS is value.
store,
sub,
subwrap,
unreach,
mul,
mulwrap,
not,
floatcast,
intcast,
@ -165,8 +168,11 @@ pub const Inst = struct {
=> UnOp,
.add,
.addwrap,
.sub,
.subwrap,
.mul,
.mulwrap,
.cmp_lt,
.cmp_lte,
.cmp_eq,

6
src/zir.zig
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@ -1680,8 +1680,11 @@ const DumpTzir = struct {
},
.add,
.addwrap,
.sub,
.subwrap,
.mul,
.mulwrap,
.cmp_lt,
.cmp_lte,
.cmp_eq,
@ -1803,8 +1806,11 @@ const DumpTzir = struct {
},
.add,
.addwrap,
.sub,
.subwrap,
.mul,
.mulwrap,
.cmp_lt,
.cmp_lte,
.cmp_eq,

11
src/zir_sema.zig
View File

@ -2179,10 +2179,13 @@ fn zirArithmetic(mod: *Module, scope: *Scope, inst: *zir.Inst.BinOp) InnerError!
}
const b = try mod.requireRuntimeBlock(scope, inst.base.src);
const ir_tag = switch (inst.base.tag) {
.add => Inst.Tag.add,
.sub => Inst.Tag.sub,
.mul => Inst.Tag.mul,
const ir_tag: Inst.Tag = switch (inst.base.tag) {
.add => .add,
.addwrap => .addwrap,
.sub => .sub,
.subwrap => .subwrap,
.mul => .mul,
.mulwrap => .mulwrap,
else => return mod.fail(scope, inst.base.src, "TODO implement arithmetic for operand '{s}''", .{@tagName(inst.base.tag)}),
};