Added first xsthammer scripts

tests/xsthammer/.gitignore

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+generate
+rtl
+xst
+xst_temp

tests/xsthammer/README

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+
+	================================
+	This is work under construction!
+	================================
+
+
+This is going to be a collection of auto-generated test cases. The goal is
+to synthesize them with Yosys and Xilinx XST and perform formal equivialence
+checks using the Yosys SAT-based equivialence checker. This will hopefully
+reveal some bugs in both applications.. ;-)
+
+
+Generating the Test Cases:
+	clang -Wall -o generate generate.cc -lstdc++
+	./generate
+
+Running XST Synthesis:
+	bash run-xst.sh
+	rm -rf xst_temp
+
+Running Yosys Synthesis and Check:
+	TBD
+

tests/xsthammer/generate.cc

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+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <string>
+
+const char *arg_types[][2] = {
+	{ "{dir} [3:0] {name}", "{name}" },
+	{ "{dir} [4:0] {name}", "{name}" },
+	{ "{dir} [5:0] {name}", "{name}" },
+	{ "{dir} signed [3:0] {name}", "{name}" },
+	{ "{dir} signed [4:0] {name}", "{name}" },
+	{ "{dir} signed [5:0] {name}", "{name}" }
+};
+
+const char *ops[] = {
+	"+",
+	"-",
+	"*",
+	"&&",
+	"||",
+	"&",
+	"|",
+	"^",
+	"<<",
+	">>",
+	"<<<",
+	">>>",
+};
+
+void strsubst(std::string &str, const std::string &match, const std::string &replace)
+{
+	size_t pos;
+	while ((pos = str.find(match)) != std::string::npos)
+		str.replace(pos, match.size(), replace);
+}
+
+int main()
+{
+	mkdir("rtl", 0777);
+	for (int ai = 0; ai < sizeof(arg_types)/sizeof(arg_types[0]); ai++)
+	for (int bi = 0; bi < sizeof(arg_types)/sizeof(arg_types[0]); bi++)
+	for (int yi = 0; yi < sizeof(arg_types)/sizeof(arg_types[0]); yi++)
+	for (int oi = 0; oi < sizeof(ops)/sizeof(ops[0]); oi++)
+	{
+		std::string a_decl = arg_types[ai][0];
+		strsubst(a_decl, "{dir}", "input");
+		strsubst(a_decl, "{name}", "a");
+
+		std::string b_decl = arg_types[bi][0];
+		strsubst(b_decl, "{dir}", "input");
+		strsubst(b_decl, "{name}", "b");
+
+		std::string y_decl = arg_types[yi][0];
+		strsubst(y_decl, "{dir}", "output");
+		strsubst(y_decl, "{name}", "y");
+
+		std::string a_ref = arg_types[ai][1];
+		strsubst(a_ref, "{dir}", "input");
+		strsubst(a_ref, "{name}", "a");
+
+		std::string b_ref = arg_types[bi][1];
+		strsubst(b_ref, "{dir}", "input");
+		strsubst(b_ref, "{name}", "b");
+
+		std::string y_ref = arg_types[yi][1];
+		strsubst(y_ref, "{dir}", "output");
+		strsubst(y_ref, "{name}", "y");
+
+		char buffer[1024];
+		snprintf(buffer, 1024, "rtl/binary_ops_%02d%02d%02d%02d.v", ai, bi, yi, oi);
+
+		FILE *f = fopen(buffer, "w");
+		fprintf(f, "module binary_ops_%02d%02d%02d%02d(a, b, y);\n", ai, bi, yi, oi);
+		fprintf(f, "%s;\n", a_decl.c_str());
+		fprintf(f, "%s;\n", b_decl.c_str());
+		fprintf(f, "%s;\n", y_decl.c_str());
+		fprintf(f, "assign %s = %s %s %s;\n", y_ref.c_str(),
+				a_ref.c_str(), ops[oi], b_ref.c_str());
+		fprintf(f, "endmodule\n");
+		fclose(f);
+	}
+	return 0;
+}
+

tests/xsthammer/run-xst.sh

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+#!/bin/bash
+
+set -ex
+mkdir -p xst
+. /opt/Xilinx/14.2/ISE_DS/settings64.sh
+
+rm -rf xst_temp
+mkdir xst_temp
+cd xst_temp
+
+for job in $( ls ../rtl | sed 's,\.v$,,' )
+do
+	cat > $job.xst <<- EOT
+		run
+		-ifn $job.prj
+		-ifmt mixed
+		-ofn $job
+		-ofmt NGC
+		-p xc6vlx75t-2-ff784
+		-top $job
+		-opt_mode Speed
+		-opt_level 1
+		-power NO
+		-iuc NO
+		-keep_hierarchy NO
+		-rtlview Yes
+		-glob_opt AllClockNets
+		-read_cores YES
+		-write_timing_constraints NO
+		-cross_clock_analysis NO
+		-hierarchy_separator /
+		-bus_delimiter <>
+		-case maintain
+		-slice_utilization_ratio 100
+		-bram_utilization_ratio 100
+		-dsp_utilization_ratio 100
+		-fsm_extract YES -fsm_encoding Auto
+		-safe_implementation No
+		-fsm_style lut
+		-ram_extract Yes
+		-ram_style Auto
+		-rom_extract Yes
+		-shreg_extract YES
+		-rom_style Auto
+		-auto_bram_packing NO
+		-resource_sharing YES
+		-async_to_sync NO
+		-use_dsp48 auto
+		-iobuf NO
+		-max_fanout 100000
+		-bufg 32
+		-register_duplication YES
+		-register_balancing No
+		-optimize_primitives NO
+		-use_clock_enable Auto
+		-use_sync_set Auto
+		-use_sync_reset Auto
+		-iob auto
+		-equivalent_register_removal YES
+		-slice_utilization_ratio_maxmargin 5
+	EOT
+
+	cat > $job.prj <<- EOT
+		verilog work "../rtl/$job.v"
+	EOT
+
+	xst -ifn $job.xst
+	netgen -w -ofmt verilog $job.ngc $job
+	cp $job.v ../xst/$job.v
+done
+