ogl_beamforming

Commit: dfd834c4c23e90108067ee642f2be1a3592669c4
Parent: 59c5ac37beff2ea3a82a0beefff08c5cd2f52d33
Author: Randy Palamar
Date:   Tue,  7 Oct 2025 17:54:45 -0600

shaders/filter: 4% performance boost in 4X sampling mode

indexing directly into a constant 2 element array saves a few
instructions per sample over a conditional mov

Diffstat:
M
shaders/filter.glsl
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/shaders/filter.glsl b/shaders/filter.glsl
@@ -48,8 +48,8 @@ vec2 rotate_iq(vec2 iq, int index)
 		// arg = PI * index
 		// cos -> 1 -1  1 -1
 		// sin -> 0  0  0  0
-		const float scale = bool(index & 1) ? -1 : 1;
-		result = scale * iq;
+		const float scales[2] = {1, -1};
+		result = scales[index & 1] * iq;
 	}break;
 	case SamplingMode_2X:{
 		// fs  = fd