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| author | Dan Ravensloft <dan.ravensloft@gmail.com> | 2020-08-26 18:44:48 +0100 |
|---|---|---|
| committer | Marcelina Kościelnicka <mwk@0x04.net> | 2020-08-26 22:50:16 +0200 |
| commit | 1a07b330f8220ce441cabce2b21633a12434229a (patch) | |
| tree | 4c564ecf2f8ae5585c90756151ad7d15381f5400 /techlibs/intel_alm/common/quartus_rename.v | |
| parent | 4f2b78e19af3a2d342efe9780e220282b7a3a046 (diff) | |
| download | yosys-1a07b330f8220ce441cabce2b21633a12434229a.tar.gz yosys-1a07b330f8220ce441cabce2b21633a12434229a.tar.bz2 yosys-1a07b330f8220ce441cabce2b21633a12434229a.zip | |
intel_alm: Add multiply signedness to cells
Quartus assumes unsigned multiplication by default, breaking signed
multiplies, so add an input signedness parameter to the MISTRAL_MUL*
cells to propagate to Quartus' <family>_mac cells.
Diffstat (limited to 'techlibs/intel_alm/common/quartus_rename.v')
| -rw-r--r-- | techlibs/intel_alm/common/quartus_rename.v | 48 |
1 files changed, 45 insertions, 3 deletions
diff --git a/techlibs/intel_alm/common/quartus_rename.v b/techlibs/intel_alm/common/quartus_rename.v index 9bc532ca2..3b4628675 100644 --- a/techlibs/intel_alm/common/quartus_rename.v +++ b/techlibs/intel_alm/common/quartus_rename.v @@ -174,20 +174,62 @@ endmodule module MISTRAL_MUL27X27(input [26:0] A, B, output [53:0] Y); -`MAC #(.ax_width(27), .ay_scan_in_width(27), .result_a_width(54), .operation_mode("M27x27")) _TECHMAP_REPLACE_ (.ax(A), .ay(B), .resulta(Y)); +parameter A_SIGNED = 1; +parameter B_SIGNED = 1; + +`MAC #( + .ax_width(27), + .signed_max(A_SIGNED ? "true" : "false"), + .ay_scan_in_width(27), + .signed_may(B_SIGNED ? "true" : "false"), + .result_a_width(54), + .operation_mode("M27x27") +) _TECHMAP_REPLACE_ ( + .ax(A), + .ay(B), + .resulta(Y) +); endmodule module MISTRAL_MUL18X18(input [17:0] A, B, output [35:0] Y); -`MAC #(.ax_width(18), .ay_scan_in_width(18), .result_a_width(36), .operation_mode("M18x18_FULL")) _TECHMAP_REPLACE_ (.ax(B), .ay(A), .resulta(Y)); +parameter A_SIGNED = 1; +parameter B_SIGNED = 1; + +`MAC #( + .ax_width(18), + .signed_max(A_SIGNED ? "true" : "false"), + .ay_scan_in_width(18), + .signed_may(B_SIGNED ? "true" : "false"), + .result_a_width(36), + .operation_mode("M18x18_FULL") +) _TECHMAP_REPLACE_ ( + .ax(A), + .ay(B), + .resulta(Y) +); endmodule module MISTRAL_MUL9X9(input [8:0] A, B, output [17:0] Y); -`MAC #(.ax_width(9), .ay_scan_in_width(9), .result_a_width(18), .operation_mode("M9x9")) _TECHMAP_REPLACE_ (.ax(A), .ay(B), .resulta(Y)); +parameter A_SIGNED = 1; +parameter B_SIGNED = 1; + +`MAC #( + .ax_width(9), + .signed_max(A_SIGNED ? "true" : "false"), + .ay_scan_in_width(9), + .signed_may(B_SIGNED ? "true" : "false"), + .result_a_width(18), + .operation_mode("M9x9") +) _TECHMAP_REPLACE_ ( + .ax(A), + .ay(B), + .resulta(Y) +); endmodule |