From 07c4a7d4388cdacaa15512dd2f6f0f9e9fcb31f5 Mon Sep 17 00:00:00 2001 From: Bogdan Vukobratovic Date: Fri, 26 Jul 2019 11:36:48 +0200 Subject: Implement opt_share This pass identifies arithmetic operators that share an operand and whose results are used in mutually exclusive cases controlled by a multiplexer, and merges them together by multiplexing the other operands --- tests/opt/opt_share_cat.v | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 tests/opt/opt_share_cat.v (limited to 'tests/opt/opt_share_cat.v') diff --git a/tests/opt/opt_share_cat.v b/tests/opt/opt_share_cat.v new file mode 100644 index 000000000..c32073360 --- /dev/null +++ b/tests/opt/opt_share_cat.v @@ -0,0 +1,15 @@ +module add_sub( + input [15:0] a, + input [15:0] b, + input [15:0] c, + input [15:0] d, + input sel, + output [63:0] res, + ); + + reg [31: 0] cat1 = {a+b, c+d}; + reg [31: 0] cat2 = {a-b, c-d}; + + assign res = {b, sel ? cat1 : cat2, a}; + +endmodule -- cgit v1.2.3 From c075486c59155d16ed278922a3752366a95246ff Mon Sep 17 00:00:00 2001 From: Bogdan Vukobratovic Date: Sun, 28 Jul 2019 16:03:54 +0200 Subject: Reimplement opt_share to work on $alu and $pmux --- tests/opt/opt_share_cat.v | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tests/opt/opt_share_cat.v') diff --git a/tests/opt/opt_share_cat.v b/tests/opt/opt_share_cat.v index c32073360..605dcfe59 100644 --- a/tests/opt/opt_share_cat.v +++ b/tests/opt/opt_share_cat.v @@ -1,4 +1,4 @@ -module add_sub( +module opt_share_test( input [15:0] a, input [15:0] b, input [15:0] c, -- cgit v1.2.3 From 280c4e7794543e99244aafffc62a2dd4454bcb06 Mon Sep 17 00:00:00 2001 From: Bogdan Vukobratovic Date: Sat, 3 Aug 2019 12:28:46 +0200 Subject: Fix spacing in opt_share tests, change wording in opt_share help --- tests/opt/opt_share_cat.v | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'tests/opt/opt_share_cat.v') diff --git a/tests/opt/opt_share_cat.v b/tests/opt/opt_share_cat.v index 605dcfe59..7b6f626b9 100644 --- a/tests/opt/opt_share_cat.v +++ b/tests/opt/opt_share_cat.v @@ -1,15 +1,15 @@ module opt_share_test( - input [15:0] a, - input [15:0] b, - input [15:0] c, - input [15:0] d, - input sel, - output [63:0] res, - ); + input [15:0] a, + input [15:0] b, + input [15:0] c, + input [15:0] d, + input sel, + output [63:0] res, + ); - reg [31: 0] cat1 = {a+b, c+d}; - reg [31: 0] cat2 = {a-b, c-d}; + reg [31: 0] cat1 = {a+b, c+d}; + reg [31: 0] cat2 = {a-b, c-d}; - assign res = {b, sel ? cat1 : cat2, a}; + assign res = {b, sel ? cat1 : cat2, a}; endmodule -- cgit v1.2.3 From d8be5ce6ba11ec78d0f7925d488fad09a3eaba2c Mon Sep 17 00:00:00 2001 From: Bogdan Vukobratovic Date: Sat, 3 Aug 2019 12:35:46 +0200 Subject: Tabs to spaces in opt_share examples --- tests/opt/opt_share_cat.v | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) (limited to 'tests/opt/opt_share_cat.v') diff --git a/tests/opt/opt_share_cat.v b/tests/opt/opt_share_cat.v index 7b6f626b9..7fb97fef5 100644 --- a/tests/opt/opt_share_cat.v +++ b/tests/opt/opt_share_cat.v @@ -1,15 +1,15 @@ module opt_share_test( - input [15:0] a, - input [15:0] b, - input [15:0] c, - input [15:0] d, - input sel, - output [63:0] res, - ); + input [15:0] a, + input [15:0] b, + input [15:0] c, + input [15:0] d, + input sel, + output [63:0] res, + ); - reg [31: 0] cat1 = {a+b, c+d}; - reg [31: 0] cat2 = {a-b, c-d}; + reg [31: 0] cat1 = {a+b, c+d}; + reg [31: 0] cat2 = {a-b, c-d}; - assign res = {b, sel ? cat1 : cat2, a}; + assign res = {b, sel ? cat1 : cat2, a}; endmodule -- cgit v1.2.3