rtl/gfx: implement shuffler

1 files changed, 25 insertions, 0 deletions

diff --git a/rtl/gfx/gfx_sp_select.sv b/rtl/gfx/gfx_sp_select.sv
new file mode 100644
index 0000000..46b23c9
--- /dev/null
+++ b/rtl/gfx/gfx_sp_select.sv
@@ -0,0 +1,25 @@
+`include "gfx/gfx_defs.sv"
+
+module gfx_sp_select
+(
+	input  logic         clk,
+
+	input  vec4          a,
+	                     b,
+	input  shuffler_deco deco,
+	input  logic         stall,
+
+	output vec4          out
+);
+
+	always_ff @(posedge clk)
+		if (!stall)
+			for (integer i = 0; i < `FLOATS_PER_VEC; ++i)
+				if (deco.is_broadcast)
+					out[i] <= deco.imm;
+				else if (deco.select_mask[i])
+					out[i] <= b[i];
+				else
+					out[i] <= a[i];
+
+endmodule