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spirv: add capability to compile with x86_64 backend

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This commit is contained in:
Ali Chraghi 2024-02-15 17:28:15 +03:30
parent 44c31194e3
commit 23b7075656
1 changed files with 20 additions and 12 deletions
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32
src/codegen/spirv/Module.zig
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@ -8,6 +8,7 @@
const Module = @This();
const std = @import("std");
const builtin = @import("builtin");
const Allocator = std.mem.Allocator;
const assert = std.debug.assert;
@ -471,19 +472,26 @@ pub fn flush(self: *Module, file: std.fs.File, target: std.Target) !void {
self.sections.functions.toWords(),
};
var iovc_buffers: [buffers.len]std.os.iovec_const = undefined;
var file_size: u64 = 0;
for (&iovc_buffers, 0..) |*iovc, i| {
// Note, since spir-v supports both little and big endian we can ignore byte order here and
// just treat the words as a sequence of bytes.
const bytes = std.mem.sliceAsBytes(buffers[i]);
iovc.* = .{ .iov_base = bytes.ptr, .iov_len = bytes.len };
file_size += bytes.len;
}
if (builtin.zig_backend == .stage2_x86_64) {
for (buffers) |buf| {
try file.writeAll(std.mem.sliceAsBytes(buf));
}
} else {
// miscompiles with x86_64 backend
var iovc_buffers: [buffers.len]std.os.iovec_const = undefined;
var file_size: u64 = 0;
for (&iovc_buffers, 0..) |*iovc, i| {
// Note, since spir-v supports both little and big endian we can ignore byte order here and
// just treat the words as a sequence of bytes.
const bytes = std.mem.sliceAsBytes(buffers[i]);
iovc.* = .{ .iov_base = bytes.ptr, .iov_len = bytes.len };
file_size += bytes.len;
}
try file.seekTo(0);
try file.setEndPos(file_size);
try file.pwritevAll(&iovc_buffers, 0);
try file.seekTo(0);
try file.setEndPos(file_size);
try file.pwritevAll(&iovc_buffers, 0);
}
}
/// Merge the sections making up a function declaration into this module.