Working with Primitives

During synthesis, the software maps your design's logic—LUTs, RAM, flipflops, etc.—to primitives. These primitives occupy specific locations (tiles or groups of tiles). Each tile has one or more sub-blocks in which to place a primitive. Placing multiple primitives into the same tile is called packing.

The following tables show the types of primitives, the tiles where you can place them, and the sub-blocks they can occupy.

Table 1. Mapping Trion Primitives to Tiles and Sub-Blocks
Tile	Sub-Block
Tile	0	1	2	3
EFT	EFX_LUT4 EFX_ADD	–	EFX_FF	–
EFL	EFX_LUT4 EFX_ADD	–	–	–
RAM	EFX_RAM_5K EFX_DPRAM_5K	Reserved	–	–
MULT	EFX_MULT	–	–	–

Table 2. Mapping Titanium and Topaz Primitives to Tiles and Sub-Blocks
Tile	Sub-Block
Tile	0	1	2	3
EFT	EFX_LUT4 EFX_ADD EFX_COMB4	Reserved	EFX_FF	–
EFM	EFX_LUT4 EFX_ADD EFX_COMB4 EFX_SRL8	Reserved	EFX_FF	–
RAM	EFX_RAM10 EFX_DPRAM10	Reserved	–	–
DSP48	EFX_DSP48 EFX_DSP24 EFX_DSP12	EFX_DSP24 EFX_DSP12	EFX_DSP12	EFX_DSP12

The following table shows another view of the same mappings.

Table 3. Mapping Primitives to Tiles
Primitive	Compatible Tiles			Allowed Sub-Block Indices
Primitive	Trion	Titanium	Topaz	Allowed Sub-Block Indices
EFX_LUT4	EFT, EFL	EFT, EFM	EFT, EFM	0
EFX_ADD	EFT, EFL	EFT, EFM	EFT, EFM	0
EFX_COMB4	EFT, EFL	EFT, EFM	EFT, EFM	0
EFX_FF	EFT	EFT, EFM	EFT, EFM	2
EFX_SRL8	–	EFM	EFM	0
EFX_RAM_5K	RAM	–	–	0
EFX_DPRAM_5K	RAM	–	–	0
EFX_RAM10	–	RAM	RAM	0
EFX_DPRAM10	–	RAM	RAM	0
EFX_MULT	MULT			0
EFX_DSP48	–	DSP48	DSP48	0
EFX_DSP24	–	DSP48	DSP48	0, 1
EFX_DSP12	–	DSP48	DSP48	0, 1, 2, 3

Finding Primitive Cell Names

When the software maps your design to primitives, it assigns a cell name to each instance. To view the primitive cell names:

In the Dashboard's Netlist tab, click the Load Synthesized Netlist icon and expand Leaf Cells.
Open the <project>.map.v file (in the Dashboard, go to Result pane > Synthesis). This file is in the project's outflow directory.