SIMD Refactor: Merge simd-dev into dev (#55)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: aider (openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>
Co-authored-by: Warp <agent@warp.dev>

quantower/lib/sine.pine

@@ -0,0 +1,48 @@
+// The MIT License (MIT)
+// © mihakralj
+//@version=6
+indicator("Ehlers Sine Wave (SINE)", "SINE", overlay=false)
+
+//@function Calculates Ehlers’ original Sine Wave using a two‑pole High‑Pass, a Super‑Smoother,
+//         and a Hilbert‑transform FIR pair (In‑phase I / Quadrature Q).
+//@doc https://github.com/mihakralj/pinescript/blob/main/indicators/cycles/sine.md
+//@param src Series to calculate the Sine Wave from
+//@param hpLength High‑Pass filter length (detrending period)
+//@param ssfLength Super‑Smoother filter length (cycle smoothing period)
+//@returns single normalized sine‑wave value in [‑1 … +1]
+sine(series float src, simple int hpLength, simple int ssfLength) =>
+    if hpLength <= 0 or ssfLength <= 0
+        runtime.error("Periods must be > 0")
+    float pi = 2 * math.asin(1)
+    float angHP = 2 * pi / hpLength
+    float aHP = (1 - math.sin(angHP)) / math.cos(angHP)
+    var float hp = 0.0
+    hp := 0.5 * (1 + aHP) * (src - nz(src[1])) + aHP * nz(hp[1])
+    float angSSF = math.sqrt(2) * pi / ssfLength
+    float aSSF = math.exp(-angSSF)
+    float bSSF = 2 * aSSF * math.cos(angSSF)
+    float c2 = bSSF
+    float c3 = -aSSF * aSSF
+    float c1 = 1 - c2 - c3
+    var float filt = 0.0
+    filt := c1 * (hp + nz(hp[1])) / 2 + c2 * nz(filt[1]) + c3 * nz(filt[2])
+    float Q =  0.0962 * nz(filt[3])  + 0.5769 * nz(filt[1])
+             - 0.5769 * nz(filt[5])  - 0.0962 * nz(filt[7])
+    float I =  filt
+    float pwr = I*I + Q*Q
+    float sineWave = pwr == 0 ? 0 : I / math.sqrt(pwr)
+    math.min(1, math.max(-1, sineWave))
+
+// ---------- Main loop ----------
+
+// Inputs
+i_source    = input.source(close,  "Source")
+i_hpLength  = input.int(40,        "High‑Pass Filter Length",      minval=1)
+i_ssfLength = input.int(10,        "Super‑Smoother Filter Length", minval=1)
+
+// Calculation
+sine_wave = sine(i_source, i_hpLength, i_ssfLength)
+
+// Plot
+plot(sine_wave, "SINE", color=color.yellow, linewidth=2)
+hline(0, "Zero Line", color.gray, linestyle=hline.style_dashed)