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intel_alm: Add multiply signedness to cells

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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.
This commit is contained in:
Dan Ravensloft 2020-08-26 18:44:48 +01:00 • committed by Marcelina Kościelnicka
parent 4f2b78e19a
commit 1a07b330f8
7 changed files with 147 additions and 16 deletions
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48
techlibs/intel_alm/common/quartus_rename.v
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@ -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