113 lines
3.1 KiB
Zig
113 lines
3.1 KiB
Zig
const std = @import("../std.zig");
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const Cpu = std.Target.Cpu;
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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 Cpu.Feature.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 <= Cpu.Feature.Set.needed_bit_count);
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var result: [len]Cpu.Feature = 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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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 = sparseFeatureSet(&[_]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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elem.dependencies.initAsDependencies(i, &result);
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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 generic_rv32 = Cpu{
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.name = "generic_rv32",
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.llvm_name = "generic-rv32",
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.features = featureSet(&all_features, &[_]Feature{}),
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};
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pub const generic_rv64 = Cpu{
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.name = "generic_rv64",
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.llvm_name = "generic-rv64",
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.features = featureSet(&all_features, &[_]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 Cpu{
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&cpu.generic_rv32,
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&cpu.generic_rv64,
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};
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pub const baseline_32_features = featureSet(&all_features, &[_]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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.relax,
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});
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pub const baseline_64_features = featureSet(&all_features, &[_]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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.relax,
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});
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