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/dsp.pine

@@ -0,0 +1,50 @@
+// The MIT License (MIT)
+// © mihakralj
+//@version=6
+indicator("Detrended Synthetic Price (DSP)", "DSP", overlay=false)
+
+//@function Calculates Detrended Synthetic Price using Ehlers dual-EMA algorithm
+//@param source Series to detrend
+//@param period Dominant cycle period for quarter/half-cycle EMA calculation
+//@returns Detrended synthetic price (difference between quarter-cycle and half-cycle EMAs)
+dsp(series float source, simple int period) =>
+    if period <= 0
+        runtime.error("Period must be greater than 0")
+    int fast_period = math.max(2, int(math.round(period / 4.0)))
+    int slow_period = math.max(3, int(math.round(period / 2.0)))
+    float alpha_fast = 2.0 / (fast_period + 1)
+    float alpha_slow = 2.0 / (slow_period + 1)
+    var float ema_fast_raw = 0.0
+    var float ema_slow_raw = 0.0
+    float current = nz(source)
+    ema_fast_raw += alpha_fast * (current - ema_fast_raw)
+    ema_slow_raw += alpha_slow * (current - ema_slow_raw)
+    var bool warmup = true
+    var float e_fast = 1.0
+    var float e_slow = 1.0
+    float ema_fast = ema_fast_raw
+    float ema_slow = ema_slow_raw
+    if warmup
+        e_fast *= (1.0 - alpha_fast)
+        e_slow *= (1.0 - alpha_slow)
+        float c_fast = 1.0 / (1.0 - e_fast)
+        float c_slow = 1.0 / (1.0 - e_slow)
+        ema_fast := c_fast * ema_fast_raw
+        ema_slow := c_slow * ema_slow_raw
+        warmup := e_fast > 1e-10 or e_slow > 1e-10
+    
+    // Return difference (detrended synthetic price)
+    ema_fast - ema_slow
+
+// ---------- Main loop ----------
+
+// Inputs
+i_source = input.source(hlc3, "Source")
+i_period = input.int(40, "Dominant Cycle Period", minval=4, maxval=200, tooltip="Dominant cycle period. Quarter-cycle and half-cycle EMAs calculated from this value.")
+
+// Calculation
+dsp_val = dsp(i_source, i_period)
+
+// Plot
+plot(dsp_val, "DSP", color=color.yellow, linewidth=2)
+hline(0, "Zero Line", color=color.gray, linestyle=hline.style_solid)