Hojun-Cho
7a4f60b041
Two cgen/check bugs surfaced by new lib modules, plus the modules
themselves (crc64, siphash, random, base64, base32).
1. `(big_u64): u32` (and `: u16`, `: u8`, `: bool`) didn't truncate.
N_CAST emitted nothing for int↔int; the value stayed in AX with
its upper bits intact and downstream CMPQ/DIVQ misread the slot.
The TK_TILDE path already had clamp logic for the same reason —
N_CAST was the missing case. Both stages now MOVL r,r for u32 and
ANDQ $mask for u8/u16/bool. Signed-narrow (i8/i16/i32) stays
no-op until w6a grows reg-reg MOVSBQ/MOVSWQ/MOVSXD. selfhost
cgcast walks alias chains via aliaslookup before checking
primsize/typenameisunsigned so `(u: random)` where
`type random = u64` still bypasses the clamp.
See cmd/w6c/cgen.c N_CAST and selfhost/cmd/wcc/cgenexpr.ww cgcast.
2. `mod.mod` type refs (`random.random` when the imported module
declares `export type random = u64;`) failed with "unknown type".
The driver concatenates imports into one flat scope, so SK_USE
`random` collided with SK_TYPE `random` and scope_define silently
dropped the use. resolve_typename's leaf lookup required
`kind == SK_USE` and gave up. Adds a `use_alias` flag to Sym; the
pass-1 decl scan now marks colliding syms in both directions
(use-after-type and type-after-use). resolve_typename and the
N_DOT cexpr branch treat `use_alias` like SK_USE for qualified
lookup. selfhost check.ww was already lenient on this path so no
ww-side change was needed; bootstrap fixed point (990-995) holds.
See cmd/wcc/check.c installdecl pass + N_DOT/resolve_typename and
cmd/wcc/ww.h Sym.use_alias.
New modules under lib/, each with @test vectors in *_test.ww and wired
into test/wcc/900_stdlib.c (26 modules → all compile):
- lib/hash/crc64 ECMA, ISO (mirror of crc32 shape)
- lib/hash/siphash SipHash-2-4, buffer-based sum/sum24
- lib/math/random SplitMix64 (init, next, u32n, u64n)
- lib/encoding/base64 RFC 4648 std + url-safe encode/decode + sizes
- lib/encoding/base32 RFC 4648 std + base32hex encode/decode + sizes
67 lines
1.6 KiB
Plaintext
67 lines
1.6 KiB
Plaintext
use crc64;
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fn putstr(s: str, into: []u8, off: i32) i32 = {
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let i: i32 = 0;
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for (i < s.len) {
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into[off + i] = s[i];
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i += 1;
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};
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return off + s.len;
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};
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fn check(s: str, ecma: u64, iso: u64) void = {
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let arr: [128]u8;
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let n: i32 = putstr(s, arr[0:128], 0);
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let buf: []u8 = arr[0:n];
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if (crc64.sum64ecma(buf) != ecma) { let _: i32 = 1/0; };
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if (crc64.sum64iso(buf) != iso) { let _: i32 = 1/0; };
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};
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@test fn vec_empty() void = {
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let arr: [1]u8;
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let buf: []u8 = arr[0:0];
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if (crc64.sum64ecma(buf) != 0u64) { let _: i32 = 1/0; };
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if (crc64.sum64iso(buf) != 0u64) { let _: i32 = 1/0; };
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};
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@test fn vec_oscar() void = {
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check("Man can believe the impossible, but can never believe the improbable. -- Oscar Wilde",
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0x17F71EF3BB851DC7u64, 0xD0E8ED57865D6AC6u64);
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};
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@test fn vec_hegel() void = {
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check("We learn from history that we do not learn from history. -- Georg Hegel",
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0xAA3C335BB49ABE9Du64, 0x5FD192CC516BBEC3u64);
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};
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@test fn vec_chapelain() void = {
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check("The final delusion is the belief that one has lost all delusions. -- Maurice Chapelain",
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0x7DFC4F7CE9552D23u64, 0xF71B429C925D99AEu64);
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};
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@test fn vec_unix() void = {
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check("UNIX is simple and coherent",
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0x9C1938E72C1D8619u64, 0x372ABFFD392FF27Du64);
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};
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@test fn vec_gnu() void = {
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check("GNU's not UNIX",
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0x2C0C97B1CB17FCBAu64, 0x9BD1FA95A419A43Du64);
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};
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@test fn vec_blm() void = {
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check("Black lives matter",
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0x159BB7B6086BF47Eu64, 0xC218CBB390CF44EBu64);
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};
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export fn main() i32 = {
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vec_empty();
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vec_oscar();
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vec_hegel();
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vec_chapelain();
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vec_unix();
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vec_gnu();
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vec_blm();
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return 0;
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};
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