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compiler-rt: compute correct integer sizes from bits at runtime

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Also, accepting `align(1)` pointers ensures that the alignment is safety
checked rather than assumed.
This commit is contained in:
Jacob Young
2025-04-11 04:23:36 -04:00
parent ed9aa8f259
commit b31a91bbef
24 changed files with 167 additions and 133 deletions
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18
lib/compiler_rt/int_from_float_test.zig
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@@ -1,8 +1,6 @@
const std = @import("std");
const builtin = @import("builtin");
const testing = std.testing;
const math = std.math;
const endian = builtin.cpu.arch.endian();
const __fixunshfti = @import("fixunshfti.zig").__fixunshfti;
const __fixunsxfti = @import("fixunsxfti.zig").__fixunsxfti;
@@ -350,14 +348,12 @@ test "fixunssfti" {
fn test_fixsfei(comptime T: type, expected: T, a: f32) !void {
const int = @typeInfo(T).int;
var expected_buf: [@divExact(int.bits, 32)]u32 = undefined;
std.mem.writeInt(T, std.mem.asBytes(&expected_buf), expected, endian);
var actual_buf: [@divExact(int.bits, 32)]u32 = undefined;
var actual: T = undefined;
_ = switch (int.signedness) {
.signed => __fixsfei,
.unsigned => __fixunssfei,
}(&actual_buf, int.bits, a);
try testing.expect(std.mem.eql(u32, &expected_buf, &actual_buf));
}(@ptrCast(&actual), int.bits, a);
try testing.expect(expected == actual);
}
test "fixsfei" {
@@ -685,14 +681,12 @@ test "fixunsdfti" {
fn test_fixdfei(comptime T: type, expected: T, a: f64) !void {
const int = @typeInfo(T).int;
var expected_buf: [@divExact(int.bits, 32)]u32 = undefined;
std.mem.writeInt(T, std.mem.asBytes(&expected_buf), expected, endian);
var actual_buf: [@divExact(int.bits, 32)]u32 = undefined;
var actual: T = undefined;
_ = switch (int.signedness) {
.signed => __fixdfei,
.unsigned => __fixunsdfei,
}(&actual_buf, int.bits, a);
try testing.expect(std.mem.eql(u32, &expected_buf, &actual_buf));
}(@ptrCast(&actual), int.bits, a);
try testing.expect(expected == actual);
}
test "fixdfei" {