| Line 347... |
Line 347... |
//
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//
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// Implement Find First/Last '1'
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// Implement Find First/Last '1'
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//
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//
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`define OR1200_IMPL_ALU_FFL1
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`define OR1200_IMPL_ALU_FFL1
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//
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//
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// Implement multiplier
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// Implement multiplier
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//
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//
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// By default multiplier is implemented
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// By default multiplier is implemented
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//
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//
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| Line 358... |
Line 359... |
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//
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//
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// Implement multiply-and-accumulate
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// Implement multiply-and-accumulate
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//
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//
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// By default MAC is implemented. To
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// By default MAC is implemented. To
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// implement MAC, multiplier needs to be
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// implement MAC, multiplier (non-serial) needs to be
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// implemented.
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// implemented.
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//
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//
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`define OR1200_MAC_IMPLEMENTED
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`define OR1200_MAC_IMPLEMENTED
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//
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//
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// Implement optional l.div/l.divu instructions
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// Implement optional l.div/l.divu instructions
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//
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//
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// By default divide instructions are not implemented
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// By default divide instructions are not implemented
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// to save area and increase clock frequency. or32 C/C++
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// to save area.
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// compiler can use soft library for division.
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//
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//
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// To implement divide, both multiplier and MAC needs to be implemented.
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//
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//
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`define OR1200_DIV_IMPLEMENTED
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`define OR1200_DIV_IMPLEMENTED
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//
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//
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// Low power, slower multiplier
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// Serial multiplier.
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//
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//`define OR1200_MULT_SERIAL
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//
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//
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// Select between low-power (larger) multiplier
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// Serial divider.
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// and faster multiplier. The actual difference
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// Uncomment to use a serial divider, otherwise will
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// is only AND logic that prevents distribution
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// be a generic parallel implementation.
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// of operands into the multiplier when instruction
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// in execution is not multiply instruction
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//
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//
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//`define OR1200_LOWPWR_MULT
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`define OR1200_DIV_SERIAL
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|
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//
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//
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// Implement HW Single Precision FPU
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// Implement HW Single Precision FPU
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//
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//
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`define OR1200_FPU_IMPLEMENTED
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`define OR1200_FPU_IMPLEMENTED
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| Line 462... |
Line 462... |
`define OR1200_ALUOP_MUL 4'd6
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`define OR1200_ALUOP_MUL 4'd6
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`define OR1200_ALUOP_CUST5 4'd7
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`define OR1200_ALUOP_CUST5 4'd7
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`define OR1200_ALUOP_SHROT 4'd8
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`define OR1200_ALUOP_SHROT 4'd8
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`define OR1200_ALUOP_DIV 4'd9
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`define OR1200_ALUOP_DIV 4'd9
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`define OR1200_ALUOP_DIVU 4'd10
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`define OR1200_ALUOP_DIVU 4'd10
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/* Order not specifically defined. */
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`define OR1200_ALUOP_MULU 4'd11
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/* Values sent to ALU from decode unit - not strictly defined by ISA */
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`define OR1200_ALUOP_IMM 4'd11
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`define OR1200_ALUOP_IMM 4'd11
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`define OR1200_ALUOP_MOVHI 4'd12
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`define OR1200_ALUOP_MOVHI 4'd12
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`define OR1200_ALUOP_COMP 4'd13
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`define OR1200_ALUOP_COMP 4'd13
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`define OR1200_ALUOP_MTSR 4'd14
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`define OR1200_ALUOP_MTSR 4'd14
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`define OR1200_ALUOP_MFSR 4'd15
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`define OR1200_ALUOP_MFSR 4'd15
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