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Added elsif preproc support

This commit is contained in:
Clifford Wolf 2013-12-18 13:41:36 +01:00
parent 921064c200
commit fbd06a1afc
2 changed files with 243 additions and 2 deletions
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15
frontends/verilog/preproc.cc
View File

@ -206,6 +206,7 @@ std::string frontend_verilog_preproc(FILE *f, std::string filename, const std::m
{
std::map<std::string, std::string> defines_map(pre_defines_map);
int ifdef_fail_level = 0;
bool in_elseif = false;
output_code.clear();
input_buffer.clear();
@ -222,17 +223,29 @@ std::string frontend_verilog_preproc(FILE *f, std::string filename, const std::m
if (tok == "`endif") {
if (ifdef_fail_level > 0)
ifdef_fail_level--;
if (ifdef_fail_level == 0)
in_elseif = false;
continue;
}
if (tok == "`else") {
if (ifdef_fail_level == 0)
ifdef_fail_level = 1;
else if (ifdef_fail_level == 1)
else if (ifdef_fail_level == 1 && !in_elseif)
ifdef_fail_level = 0;
continue;
}
if (tok == "`elsif") {
skip_spaces();
std::string name = next_token(true);
if (ifdef_fail_level == 0)
ifdef_fail_level = 1, in_elseif = true;
else if (ifdef_fail_level == 1 && defines_map.count(name) != 0)
ifdef_fail_level = 0, in_elseif = true;
continue;
}
if (tok == "`ifdef") {
skip_spaces();
std::string name = next_token(true);

230
tests/simple/macros.v
View File

@ -1,9 +1,237 @@
module test(a, y);
module test_def(a, y);
`define MSB_LSB_SEP :
`define get_msb(off, len) ((off)+(len)-1)
`define get_lsb(off, len) (off)
`define sel_bits(offset, len) `get_msb(offset, len) `MSB_LSB_SEP `get_lsb(offset, len)
input [31:0] a;
output [7:0] y;
assign y = a[`sel_bits(16, 8)];
endmodule
// ---------------------------------------------------
module test_ifdef(a, y);
input [2:0] a;
output reg [31:0] y;
always @* begin
y = 0;
`undef X
`ifdef X
y = y + 42;
`else
`undef A
`undef B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`undef A
`define B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`undef B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`define B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
// ------------------------------------
`undef A
`undef B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`undef A
`define B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`undef B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`define B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
// ------------------------------------
`undef A
`ifdef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
`define A
`ifdef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
// ------------------------------------
`undef A
`ifndef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
`define A
`ifndef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
`endif
`define X
`ifdef X
`undef A
`undef B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`undef A
`define B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`undef B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`define B
`ifdef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
// ------------------------------------
`undef A
`undef B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`undef A
`define B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`undef B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
`define A
`define B
`ifndef A
y = (y << 1) | a[0];
`elsif B
y = (y << 1) | a[1];
`else
y = (y << 1) | a[2];
`endif
// ------------------------------------
`undef A
`ifdef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
`define A
`ifdef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
// ------------------------------------
`undef A
`ifndef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
`define A
`ifndef A
y = (y << 1) | a[0];
`else
y = (y << 1) | a[2];
`endif
`else
y = y + 42;
`endif
end
endmodule