code wiki / _hdl_build / nx_sim_verification_gate.nx
nx_sim_verification_gate.nx
buildroot/runtime/_hdl_build/nx_sim_verification_gate.nx
about
nx_sim_verification_gate.nx -- climb the credibility ladder's VERIFICATION axis with a real SOLUTION-VERIFICATION
artifact required by NASA-STD-7009 / ASME V&V 10 & 20 / AIAA G-077: an OBSERVED ORDER-OF-ACCURACY convergence
study. Integrate the harmonic oscillator (a=-x, omega=1, exact x(t)=A cos t) to a fixed time T=1 with shrinking
step dt=1/D, and measure the error vs the EXACT analytic solution (our sovereign cos). For a 2nd-order method
(leapfrog) the error must drop ~4x each time dt halves (order p=log2(ratio)~2). The test also genuinely MEASURES
order: forward-Euler (1st order) drops only ~2x -- so a method falsely claimed "2nd order" is CAUGHT. This
converts Verification from BASIC(2) toward CREDIBLE(3). No float, deterministic. GREEN iff 6/6. license_tier: ORIGINAL
dependencies 1 imports · 0 importers
imports: nx_syscalls.nx
imported by: nobody (leaf or entry point)
call flow from main pre-order; caps 40 nodes / depth 6 declared; ↻ = already shown
structs
| none |
consts
| none |
functions
| 10 | func g_w(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 } |
| 11 | func g_n(v: i64) -> i64 { var m: i64=v; if m<0{g_w("-");m=0-m} let t:*u8=sys_mmap(24); var k:i64=0; if m==0{t[0]=48 as u8;k=1}; while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1}; var i:i64=0; let o:*u8=sys_mmap(24); while i<k{o[i]=t[k-1-i];i=i+1}; sys_write(1,o,k); return 0 } |
| 12 | func g_row(id: *u8, ok: i64, pass: *i64) -> i64 { g_w(" "); g_w(id); g_w(": "); if ok==1 { g_w("OK\n"); pass[0]=pass[0]+1 } else { g_w("FAIL\n") } return 0 } |
| 13 | func iabs(x: i64) -> i64 { if x<0 { return 0-x } return x } called by 1: main |
| 15 | func sin_fixed(Xin: i64, SC: i64) -> i64 called by 1: cos_fixed |
| 27 | func cos_fixed(X: i64, SC: i64) -> i64 { return sin_fixed(X+1570796, SC) } |
| 30 | func lf_xT(A: i64, D: i64, N: i64) -> i64 called by 1: main |
| 36 | func eu_xT(A: i64, D: i64, N: i64) -> i64 called by 1: main |
| 42 | func main() -> i64 |