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https://opencores.org/ocsvn/raptor64/raptor64/trunk
[/] [raptor64/] [trunk/] [rtl/] [verilog/] [Raptor64_BranchHistory.v] - Diff between revs 45 and 48
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| Rev 45 |
Rev 48 |
| Line 24... |
Line 24... |
// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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//
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//
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//
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//=============================================================================
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//=============================================================================
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//
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//
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module Raptor64_BranchHistory(rst, clk, advanceX, xIRvalid, xIR, pc, xpc, takb, predict_taken);
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module Raptor64_BranchHistory(rst, clk, advanceX, xIR, pc, xpc, takb, predict_taken);
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input rst;
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input rst;
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input clk;
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input clk;
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input advanceX;
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input advanceX;
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input xIRvalid;
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input [31:0] xIR;
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input [31:0] xIR;
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input [63:0] pc;
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input [63:0] pc;
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input [63:0] xpc;
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input [63:0] xpc;
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input takb;
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input takb;
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output predict_taken;
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output predict_taken;
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wire [6:0] xOpcode = xIR[31:25];
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wire [6:0] xOpcode = xIR[31:25];
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wire isxBranchI = (xOpcode==`BEQI || xOpcode==`BNEI ||
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wire isxBranchI = (xOpcode==`BEQI || xOpcode==`BNEI ||
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xOpcode==`BLTI || xOpcode==`BLEI || xOpcode==`BGTI || xOpcode==`BGEI ||
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xOpcode==`BLTI || xOpcode==`BLEI || xOpcode==`BGTI || xOpcode==`BGEI ||
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xOpcode==`BLTUI || xOpcode==`BLEUI || xOpcode==`BGTUI || xOpcode==`BGEUI)
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xOpcode==`BLTUI || xOpcode==`BLEUI || xOpcode==`BGTUI || xOpcode==`BGEUI)
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;
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;
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wire isxBranch = xIRvalid && (isxBranchI || xOpcode==`TRAPcc || xOpcode==`TRAPcci || xOpcode==`BTRI || xOpcode==`BTRR);
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wire isxBranch = (isxBranchI || xOpcode==`TRAPcc || xOpcode==`TRAPcci || xOpcode==`BTRI || xOpcode==`BTRR);
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// Two bit saturating counter
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// Two bit saturating counter
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reg [1:0] xbits_new;
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reg [1:0] xbits_new;
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always @(takb or bht_xbits)
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always @(takb or bht_xbits)
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if (takb) begin
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if (takb) begin
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