Function cbm_rsq_decode

src/semantic/rotsq.c:121–127

/* ── Dequantize into the rotated basis ──────────────────────────────── */

void cbm_rsq_decode(const cbm_rsq_code_t *c, float *out) {
    for (int i = 0; i < CBM_RSQ_CODE_BYTES; i++) {
        uint8_t b = c->codes[i];
        out[i * 2] = c->offset + c->scale * (float)(b & 0x0F);
        out[i * 2 + 1] = c->offset + c->scale * (float)(b >> 4);
    }
}