`nx_bench_fnv.nx` source

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1// nx_bench_fnv.nx -- NishiLang twin of bench/xlang/fnv.c. FNV-1a over an LCG byte
2// stream (multiply+xor). Prints hash then elapsed_us. (x>>33)&0xff is sign-shift
3// agnostic (result low byte = x bits 33..40, identical for sar/shr) so the
4// checksum is bit-exact vs the gcc AND clang uint64 builds (3rd-party oracles).
5// license_tier: ORIGINAL  No hw writes (Rule 26).
6// (nx_syscalls_x86_64.nx import REMOVED 2026-07-31, debt 1785528831: this file already
7// gets the canonical syscall layer via nx_clock.nx -> syscalls.nx, so importing the raw-x86
8// module too put TWO syscall layers in one TU -- every wrapper twice, numbering picked by
9// definition ORDER, silently.)
10import "nx_clock.nx"
11const K_MAGIC_200000000: i64 = 200000000
12const K_MAGIC_1469598103934665603: i64 = 1469598103934665603
13const K_MAGIC_6364136223846793005: i64 = 6364136223846793005
14const K_MAGIC_1442695040888963407: i64 = 1442695040888963407
15const K_MAGIC_1099511628211: i64 = 1099511628211
16
17func bf_emit_i64(fd: i64, n: i64) -> i64 {
18    let scratch: *u8 = sys_mmap(32)
19    var v: i64 = n
20    var neg: i64 = 0
21    if v < 0 { neg = 1; v = 0 - v }
22    var k: i64 = 0
23    if v == 0 { scratch[0] = 0x30 as u8; k = 1 }
24    while v > 0 { scratch[k] = (0x30 + (v - (v / 10) * 10)) as u8; v = v / 10; k = k + 1 }
25    let rev: *u8 = sys_mmap(48)
26    var ro: i64 = 0
27    if neg == 1 { rev[0] = 0x2D as u8; ro = 1 }
28    var j: i64 = 0
29    while j < k { rev[ro + j] = scratch[k - 1 - j]; j = j + 1 }
30    rev[ro + k] = 0x0A as u8
31    sys_write(fd, rev, ro + k + 1)
32    return 0
33}
34
35func main() -> i64 {
36    let N: i64 = K_MAGIC_200000000
37    var x: i64 = 1
38    var h: i64 = K_MAGIC_1469598103934665603
39    let start: i64 = nx_clock_monotonic_ns()
40    var i: i64 = 0
41    while i < N {
42        x = x * K_MAGIC_6364136223846793005 + K_MAGIC_1442695040888963407
43        let b: i64 = (x >> 33) & 0xff
44        h = (h ^ b) * K_MAGIC_1099511628211
45        i = i + 1
46    }
47    let end: i64 = nx_clock_monotonic_ns()
48    let us: i64 = (end - start) / 1000
49    bf_emit_i64(1, h)
50    bf_emit_i64(1, us)
51    return 0
52}
nx_bench_fnv.nx source

`nx_bench_fnv.nx` source
