BeeEngine/fastgltf-zig
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fixed simdjson on x86_64|

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This commit is contained in:
Alex Andreba 2025-02-20 17:39:15 +01:00
parent f1ac1d45e5
commit 00e52ba6bb
7 changed files with 641 additions and 2 deletions
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26
build.zig
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@ -3,7 +3,7 @@ const std = @import("std");
// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) void {
pub fn build(b: *std.Build) !void {
const fastgltf_dep = b.dependency("fastgltf", .{});
const target = b.standardTargetOptions(.{});
const optimize = b.standardOptimizeOption(.{});
@ -21,6 +21,9 @@ pub fn build(b: *std.Build) void {
const compile_target = if (compile_as_cpp20) "c++20" else "c++17";
const simdjson_dep = b.dependency("simdjson", .{});
const simdjson_evex512: ?*std.Build.Step.WriteFile = if (target.result.cpu.arch == .x86_64) try fix_evex512_simdjson(b, simdjson_dep) else null;
const simdjson_source_file_root = if (simdjson_evex512) |evex512| evex512.getDirectory() else simdjson_dep.path("singleheader");
const simdjson_lib = b.addStaticLibrary(.{
.name = "simdjson",
.target = target,
@ -29,7 +32,7 @@ pub fn build(b: *std.Build) void {
});
simdjson_lib.linkLibCpp();
simdjson_lib.addCSourceFiles(.{
.root = simdjson_dep.path("singleheader"),
.root = simdjson_source_file_root,
.files = &.{"simdjson.cpp"},
.flags = &.{
b.fmt("--std={s}", .{compile_target}),
@ -37,6 +40,7 @@ pub fn build(b: *std.Build) void {
});
simdjson_lib.addIncludePath(simdjson_dep.path("singleheader"));
simdjson_lib.installHeadersDirectory(simdjson_dep.path("singleheader"), ".", .{ .include_extensions = &.{".h"} });
if (simdjson_evex512) |evex512| simdjson_lib.step.dependOn(&evex512.step);
b.installArtifact(simdjson_lib);
const fastgltf_lib: *std.Build.Step.Compile = switch (preferred_link_mode) {
@ -88,3 +92,21 @@ pub fn build(b: *std.Build) void {
run.dependOn(&run_artifact.step);
// b.installArtifact(example);
}
fn fix_evex512_simdjson(b: *std.Build, simdjson_dep: *std.Build.Dependency) !*std.Build.Step.WriteFile {
const original_file = try std.fs.openFileAbsolute(simdjson_dep.path(b.pathJoin(&.{ "singleheader", "simdjson.cpp" })).getPath(b), .{});
defer original_file.close();
const original_content = try original_file.readToEndAlloc(b.allocator, std.math.maxInt(usize));
defer b.allocator.free(original_content);
const edited_content = try std.mem.replaceOwned(
u8,
b.allocator,
original_content,
"SIMDJSON_TARGET_REGION(\"avx512f,avx512dq,avx512cd,avx512bw,avx512vbmi,avx512vbmi2,avx512vl,avx2,bmi,pclmul,lzcnt,popcnt\")",
"SIMDJSON_TARGET_REGION(\"avx512f,avx512dq,avx512cd,avx512bw,avx512vbmi,avx512vbmi2,avx512vl,avx2,bmi,pclmul,lzcnt,popcnt,evex512\")",
);
defer b.allocator.free(edited_content);
return b.addWriteFile("simdjson.cpp", edited_content);
}