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-rw-r--r--techlibs/intel_alm/Makefile.inc3
-rw-r--r--techlibs/intel_alm/common/abc9_map.v18
-rw-r--r--techlibs/intel_alm/common/abc9_model.v55
-rw-r--r--techlibs/intel_alm/common/abc9_unmap.v11
-rw-r--r--techlibs/intel_alm/common/dff_sim.v42
-rw-r--r--techlibs/intel_alm/common/mem_sim.v10
-rw-r--r--techlibs/intel_alm/synth_intel_alm.cc29
7 files changed, 149 insertions, 19 deletions
diff --git a/techlibs/intel_alm/Makefile.inc b/techlibs/intel_alm/Makefile.inc
index ed6c4510b..477be6353 100644
--- a/techlibs/intel_alm/Makefile.inc
+++ b/techlibs/intel_alm/Makefile.inc
@@ -2,6 +2,9 @@
OBJS += techlibs/intel_alm/synth_intel_alm.o
# Techmap
+$(eval $(call add_share_file,share/intel_alm/common,techlibs/intel_alm/common/abc9_map.v))
+$(eval $(call add_share_file,share/intel_alm/common,techlibs/intel_alm/common/abc9_unmap.v))
+$(eval $(call add_share_file,share/intel_alm/common,techlibs/intel_alm/common/abc9_model.v))
$(eval $(call add_share_file,share/intel_alm/common,techlibs/intel_alm/common/alm_map.v))
$(eval $(call add_share_file,share/intel_alm/common,techlibs/intel_alm/common/alm_sim.v))
$(eval $(call add_share_file,share/intel_alm/common,techlibs/intel_alm/common/arith_alm_map.v))
diff --git a/techlibs/intel_alm/common/abc9_map.v b/techlibs/intel_alm/common/abc9_map.v
new file mode 100644
index 000000000..32ad79bdc
--- /dev/null
+++ b/techlibs/intel_alm/common/abc9_map.v
@@ -0,0 +1,18 @@
+// This file exists to map purely-synchronous flops to ABC9 flops, while
+// mapping flops with asynchronous-clear as boxes, this is because ABC9
+// doesn't support asynchronous-clear flops in sequential synthesis.
+
+module MISTRAL_FF(
+ input DATAIN, CLK, ACLR, ENA, SCLR, SLOAD, SDATA,
+ output reg Q
+);
+
+parameter _TECHMAP_CONSTMSK_ACLR_ = 1'b0;
+
+// If the async-clear is constant, we assume it's disabled.
+if (_TECHMAP_CONSTMSK_ACLR_ != 1'b0)
+ MISTRAL_FF_SYNCONLY _TECHMAP_REPLACE_ (.DATAIN(DATAIN), .CLK(CLK), .ENA(ENA), .SCLR(SCLR), .SLOAD(SLOAD), .SDATA(SDATA), .Q(Q));
+else
+ wire _TECHMAP_FAIL_ = 1;
+
+endmodule
diff --git a/techlibs/intel_alm/common/abc9_model.v b/techlibs/intel_alm/common/abc9_model.v
new file mode 100644
index 000000000..dd46147a5
--- /dev/null
+++ b/techlibs/intel_alm/common/abc9_model.v
@@ -0,0 +1,55 @@
+`ifdef cyclonev
+`define SYNCPATH 262
+`define SYNCSETUP 522
+`define COMBPATH 0
+`endif
+`ifdef cyclone10gx
+`define SYNCPATH 219
+`define SYNCSETUP 268
+`define COMBPATH 0
+`endif
+
+// fallback for when a family isn't detected (e.g. when techmapping for equivalence)
+`ifndef SYNCPATH
+`define SYNCPATH 0
+`define SYNCSETUP 0
+`define COMBPATH 0
+`endif
+
+// This is a purely-synchronous flop, that ABC9 can use for sequential synthesis.
+(* abc9_flop, lib_whitebox *)
+module MISTRAL_FF_SYNCONLY(
+ input DATAIN, CLK, ENA, SCLR, SLOAD, SDATA,
+ output reg Q
+);
+
+specify
+ if (ENA) (posedge CLK => (Q : DATAIN)) = `SYNCPATH;
+ if (ENA) (posedge CLK => (Q : SCLR)) = `SYNCPATH;
+ if (ENA) (posedge CLK => (Q : SLOAD)) = `SYNCPATH;
+ if (ENA) (posedge CLK => (Q : SDATA)) = `SYNCPATH;
+
+ $setup(DATAIN, posedge CLK, `SYNCSETUP);
+ $setup(ENA, posedge CLK, `SYNCSETUP);
+ $setup(SCLR, posedge CLK, `SYNCSETUP);
+ $setup(SLOAD, posedge CLK, `SYNCSETUP);
+ $setup(SDATA, posedge CLK, `SYNCSETUP);
+endspecify
+
+initial begin
+ // Altera flops initialise to zero.
+ Q = 0;
+end
+
+always @(posedge CLK) begin
+ // Clock-enable
+ if (ENA) begin
+ // Synchronous clear
+ if (SCLR) Q <= 0;
+ // Synchronous load
+ else if (SLOAD) Q <= SDATA;
+ else Q <= DATAIN;
+ end
+end
+
+endmodule
diff --git a/techlibs/intel_alm/common/abc9_unmap.v b/techlibs/intel_alm/common/abc9_unmap.v
new file mode 100644
index 000000000..0eda69560
--- /dev/null
+++ b/techlibs/intel_alm/common/abc9_unmap.v
@@ -0,0 +1,11 @@
+// After performing sequential synthesis, map the synchronous flops back to
+// standard MISTRAL_FF flops.
+
+module MISTRAL_FF_SYNCONLY(
+ input DATAIN, CLK, ENA, SCLR, SLOAD, SDATA,
+ output reg Q
+);
+
+MISTRAL_FF _TECHMAP_REPLACE_ (.DATAIN(DATAIN), .CLK(CLK), .ACLR(1'b1), .ENA(ENA), .SCLR(SCLR), .SLOAD(SLOAD), .SDATA(SDATA), .Q(Q));
+
+endmodule
diff --git a/techlibs/intel_alm/common/dff_sim.v b/techlibs/intel_alm/common/dff_sim.v
index 32444dd46..94aa37fb5 100644
--- a/techlibs/intel_alm/common/dff_sim.v
+++ b/techlibs/intel_alm/common/dff_sim.v
@@ -53,23 +53,45 @@
// Q: data output
//
// Note: the DFFEAS primitive is mostly emulated; it does not reflect what the hardware implements.
+
+`ifdef cyclonev
+`define SYNCPATH 262
+`define SYNCSETUP 522
+`define COMBPATH 0
+`endif
+`ifdef cyclone10gx
+`define SYNCPATH 219
+`define SYNCSETUP 268
+`define COMBPATH 0
+`endif
+
+// fallback for when a family isn't detected (e.g. when techmapping for equivalence)
+`ifndef SYNCPATH
+`define SYNCPATH 0
+`define SYNCSETUP 0
+`define COMBPATH 0
+`endif
+
+(* abc9_box, lib_whitebox *)
module MISTRAL_FF(
input DATAIN, CLK, ACLR, ENA, SCLR, SLOAD, SDATA,
output reg Q
);
-`ifdef cyclonev
-specify
- (posedge CLK => (Q : DATAIN)) = 262;
- $setup(DATAIN, posedge CLK, 522);
-endspecify
-`endif
-`ifdef cyclone10gx
specify
- (posedge CLK => (Q : DATAIN)) = 219;
- $setup(DATAIN, posedge CLK, 268);
+ if (ENA) (posedge CLK => (Q : DATAIN)) = `SYNCPATH;
+ if (ENA) (posedge CLK => (Q : SCLR)) = `SYNCPATH;
+ if (ENA) (posedge CLK => (Q : SLOAD)) = `SYNCPATH;
+ if (ENA) (posedge CLK => (Q : SDATA)) = `SYNCPATH;
+
+ $setup(DATAIN, posedge CLK, `SYNCSETUP);
+ $setup(ENA, posedge CLK, `SYNCSETUP);
+ $setup(SCLR, posedge CLK, `SYNCSETUP);
+ $setup(SLOAD, posedge CLK, `SYNCSETUP);
+ $setup(SDATA, posedge CLK, `SYNCSETUP);
+
+ (ACLR => Q) = `COMBPATH;
endspecify
-`endif
initial begin
// Altera flops initialise to zero.
diff --git a/techlibs/intel_alm/common/mem_sim.v b/techlibs/intel_alm/common/mem_sim.v
index ae79b19a4..f6f9ecb02 100644
--- a/techlibs/intel_alm/common/mem_sim.v
+++ b/techlibs/intel_alm/common/mem_sim.v
@@ -48,10 +48,20 @@
// the following model because it's very difficult to trigger this in practice
// as clock cycles will be much longer than any potential blip of 'x, so the
// model can be treated as always returning a defined result.
+
+(* abc9_box, lib_whitebox *)
module MISTRAL_MLAB(input [4:0] A1ADDR, input A1DATA, A1EN, CLK1, input [4:0] B1ADDR, output B1DATA);
reg [31:0] mem = 32'b0;
+// TODO
+specify
+ $setup(A1ADDR, posedge CLK1, 0);
+ $setup(A1DATA, posedge CLK1, 0);
+
+ (B1ADDR *> B1DATA) = 0;
+endspecify
+
always @(posedge CLK1)
if (A1EN) mem[A1ADDR] <= A1DATA;
diff --git a/techlibs/intel_alm/synth_intel_alm.cc b/techlibs/intel_alm/synth_intel_alm.cc
index fabfc9003..982857dd5 100644
--- a/techlibs/intel_alm/synth_intel_alm.cc
+++ b/techlibs/intel_alm/synth_intel_alm.cc
@@ -38,20 +38,26 @@ struct SynthIntelALMPass : public ScriptPass {
log("This command runs synthesis for ALM-based Intel FPGAs.\n");
log("\n");
log(" -top <module>\n");
- log(" use the specified module as top module (default='top')\n");
+ log(" use the specified module as top module\n");
log("\n");
log(" -family <family>\n");
log(" target one of:\n");
log(" \"cyclonev\" - Cyclone V (default)\n");
log(" \"cyclone10gx\" - Cyclone 10GX\n");
log("\n");
- log(" -quartus\n");
- log(" output a netlist using Quartus cells instead of MISTRAL_* cells\n");
- log("\n");
log(" -vqm <file>\n");
log(" write the design to the specified Verilog Quartus Mapping File. Writing of an\n");
log(" output file is omitted if this parameter is not specified. Implies -quartus.\n");
log("\n");
+ log(" -noflatten\n");
+ log(" do not flatten design before synthesis; useful for per-module area statistics\n");
+ log("\n");
+ log(" -quartus\n");
+ log(" output a netlist using Quartus cells instead of MISTRAL_* cells\n");
+ log("\n");
+ log(" -dff\n");
+ log(" pass DFFs to ABC to perform sequential logic optimisations (EXPERIMENTAL)\n");
+ log("\n");
log(" -run <from_label>:<to_label>\n");
log(" only run the commands between the labels (see below). an empty\n");
log(" from label is synonymous to 'begin', and empty to label is\n");
@@ -63,16 +69,13 @@ struct SynthIntelALMPass : public ScriptPass {
log(" -nobram\n");
log(" do not use block RAM cells in output netlist\n");
log("\n");
- log(" -noflatten\n");
- log(" do not flatten design before synthesis\n");
- log("\n");
log("The following commands are executed by this synthesis command:\n");
help_script();
log("\n");
}
string top_opt, family_opt, bram_type, vout_file;
- bool flatten, quartus, nolutram, nobram;
+ bool flatten, quartus, nolutram, nobram, dff;
void clear_flags() override
{
@@ -84,6 +87,7 @@ struct SynthIntelALMPass : public ScriptPass {
quartus = false;
nolutram = false;
nobram = false;
+ dff = false;
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
@@ -130,6 +134,10 @@ struct SynthIntelALMPass : public ScriptPass {
flatten = false;
continue;
}
+ if (args[argidx] == "-dff") {
+ dff = true;
+ continue;
+ }
break;
}
extra_args(args, argidx, design);
@@ -165,6 +173,7 @@ struct SynthIntelALMPass : public ScriptPass {
run(stringf("read_verilog -specify -lib -D %s +/intel_alm/common/alm_sim.v", family_opt.c_str()));
run(stringf("read_verilog -specify -lib -D %s +/intel_alm/common/dff_sim.v", family_opt.c_str()));
run(stringf("read_verilog -specify -lib -D %s +/intel_alm/common/mem_sim.v", family_opt.c_str()));
+ run(stringf("read_verilog -specify -lib -D %s +/intel_alm/common/abc9_model.v", family_opt.c_str()));
// Misc and common cells
run("read_verilog -lib +/intel/common/altpll_bb.v");
@@ -209,7 +218,9 @@ struct SynthIntelALMPass : public ScriptPass {
}
if (check_label("map_luts")) {
- run("abc9 -maxlut 6 -W 200");
+ run("techmap -map +/intel_alm/common/abc9_map.v");
+ run(stringf("abc9 %s -maxlut 6 -W 200", help_mode ? "[-dff]" : dff ? "-dff" : ""));
+ run("techmap -map +/intel_alm/common/abc9_unmap.v");
run("techmap -map +/intel_alm/common/alm_map.v");
run("opt -fast");
run("autoname");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-20 20:24:36 +0000