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84f1893c18
in favor of CPU features. Also rearrange the `std.Target`
data structure.
* note: `@import("builtin")` was already deprecated in favor of
`@import("std").builtin`.
* `std.builtin.arch` is now deprecated in favor of
`std.builtin.cpu.arch`.
* `std.Target.CpuFeatures.Cpu` is now `std.Target.Cpu.Model`.
* `std.Target.CpuFeatures` is now `std.Target.Cpu`.
* `std.Target` no longer has an `arch` field. Instead it has a
`cpu` field, which has `arch`, `model`, and `features`.
* `std.Target` no longer has a `cpu_features` field.
* `std.Target.Arch` is moved to `std.Target.Cpu.Arch` and
it is an enum instead of a tagged union.
* `std.Target.parseOs` is moved to `std.Target.Os.parse`.
* `std.Target.parseAbi` is moved to `std.Target.Abi.parse`.
* `std.Target.parseArchSub` is only for arch now and moved
to `std.Target.Cpu.Arch.parse`.
* `std.Target.parse` is improved to accept CPU name and features.
* `std.Target.Arch.getBaselineCpuFeatures` is moved to
`std.Target.Cpu.baseline`.
* `std.Target.allCpus` is renamed to `std.Target.allCpuModels`.
* `std.Target.defaultAbi` is moved to `std.Target.Abi.default`.
* Significant cleanup of aarch64 and arm CPU features, resulting in
the needed bit count for cpu feature set going from 174 to 138.
* Add `std.Target.Cpu.Feature.Set.addFeatureSet` for merging
feature sets together.
`-target-feature` and `-target-cpu` are removed in favor of
`-mcpu`, to conform to established conventions, and it gains
additional power to support cpu features. The syntax is:
-mcpu=name+on1+on2-off1-off2
closes #4261
122 lines
3.3 KiB
Zig
122 lines
3.3 KiB
Zig
const std = @import("../std.zig");
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const CpuFeature = std.Target.Cpu.Feature;
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const CpuModel = std.Target.Cpu.Model;
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pub const Feature = enum {
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@"64bit",
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a,
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c,
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d,
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e,
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f,
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m,
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relax,
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};
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pub usingnamespace CpuFeature.feature_set_fns(Feature);
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pub const all_features = blk: {
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const len = @typeInfo(Feature).Enum.fields.len;
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std.debug.assert(len <= CpuFeature.Set.needed_bit_count);
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var result: [len]CpuFeature = undefined;
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result[@enumToInt(Feature.@"64bit")] = .{
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.llvm_name = "64bit",
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.description = "Implements RV64",
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.dependencies = featureSet(&[_]Feature{}),
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};
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result[@enumToInt(Feature.a)] = .{
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.llvm_name = "a",
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.description = "'A' (Atomic Instructions)",
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.dependencies = featureSet(&[_]Feature{}),
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};
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result[@enumToInt(Feature.c)] = .{
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.llvm_name = "c",
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.description = "'C' (Compressed Instructions)",
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.dependencies = featureSet(&[_]Feature{}),
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};
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result[@enumToInt(Feature.d)] = .{
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.llvm_name = "d",
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.description = "'D' (Double-Precision Floating-Point)",
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.dependencies = featureSet(&[_]Feature{
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.f,
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}),
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};
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result[@enumToInt(Feature.e)] = .{
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.llvm_name = "e",
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.description = "Implements RV32E (provides 16 rather than 32 GPRs)",
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.dependencies = featureSet(&[_]Feature{}),
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};
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result[@enumToInt(Feature.f)] = .{
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.llvm_name = "f",
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.description = "'F' (Single-Precision Floating-Point)",
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.dependencies = featureSet(&[_]Feature{}),
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};
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result[@enumToInt(Feature.m)] = .{
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.llvm_name = "m",
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.description = "'M' (Integer Multiplication and Division)",
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.dependencies = featureSet(&[_]Feature{}),
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};
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result[@enumToInt(Feature.relax)] = .{
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.llvm_name = "relax",
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.description = "Enable Linker relaxation.",
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.dependencies = featureSet(&[_]Feature{}),
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};
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const ti = @typeInfo(Feature);
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for (result) |*elem, i| {
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elem.index = i;
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elem.name = ti.Enum.fields[i].name;
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}
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break :blk result;
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};
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pub const cpu = struct {
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pub const baseline_rv32 = CpuModel{
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.name = "baseline_rv32",
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.llvm_name = "generic-rv32",
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.features = featureSet(&[_]Feature{
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.a,
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.c,
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.d,
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.f,
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.m,
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}),
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};
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pub const baseline_rv64 = CpuModel{
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.name = "baseline_rv64",
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.llvm_name = "generic-rv64",
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.features = featureSet(&[_]Feature{
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.@"64bit",
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.a,
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.c,
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.d,
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.f,
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.m,
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}),
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};
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pub const generic_rv32 = CpuModel{
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.name = "generic_rv32",
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.llvm_name = "generic-rv32",
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.features = featureSet(&[_]Feature{}),
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};
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pub const generic_rv64 = CpuModel{
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.name = "generic_rv64",
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.llvm_name = "generic-rv64",
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.features = featureSet(&[_]Feature{
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.@"64bit",
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}),
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};
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};
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/// All riscv CPUs, sorted alphabetically by name.
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/// TODO: Replace this with usage of `std.meta.declList`. It does work, but stage1
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/// compiler has inefficient memory and CPU usage, affecting build times.
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pub const all_cpus = &[_]*const CpuModel{
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&cpu.baseline_rv32,
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&cpu.baseline_rv64,
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&cpu.generic_rv32,
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&cpu.generic_rv64,
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};
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