| Line 35... |
Line 35... |
// `EOR_RR: res <= a ^ b;
|
// `EOR_RR: res <= a ^ b;
|
// `MUL_RR: prod <= a * b; // slows the whole core down
|
// `MUL_RR: prod <= a * b; // slows the whole core down
|
`ASL_RRR: res <= shlo;
|
`ASL_RRR: res <= shlo;
|
`LSR_RRR: res <= shro;
|
`LSR_RRR: res <= shro;
|
endcase
|
endcase
|
`ADD_ZPX,`ADD_IX,`ADD_IY,`ADD_ABS,`ADD_ABSX,`ADD_RIND: begin res <= a + b; end
|
`ADD_ZPX,`ADD_IX,`ADD_IY,`ADD_ABS,`ADD_ABSX,`ADD_RIND: begin res <= a + b + {31'b0,df&cf}; end
|
`SUB_ZPX,`SUB_IX,`SUB_IY,`SUB_ABS,`SUB_ABSX,`SUB_RIND: begin res <= a - b; end // Also CMP
|
`SUB_ZPX,`SUB_IX,`SUB_IY,`SUB_ABS,`SUB_ABSX,`SUB_RIND: begin res <= a - b - {31'b0,df&~cf&|Rt}; end // Also CMP
|
`AND_ZPX,`AND_IX,`AND_IY,`AND_ABS,`AND_ABSX,`AND_RIND: begin res <= a & b; end // Also BIT
|
`AND_ZPX,`AND_IX,`AND_IY,`AND_ABS,`AND_ABSX,`AND_RIND: begin res <= a & b; end // Also BIT
|
`OR_ZPX,`OR_IX,`OR_IY,`OR_ABS,`OR_ABSX,`OR_RIND: begin res <= a | b; end // Also LD
|
`OR_ZPX,`OR_IX,`OR_IY,`OR_ABS,`OR_ABSX,`OR_RIND: begin res <= a | b; end // Also LD
|
`EOR_ZPX,`EOR_IX,`EOR_IY,`EOR_ABS,`EOR_ABSX,`EOR_RIND: begin res <= a ^ b; end
|
`EOR_ZPX,`EOR_IX,`EOR_IY,`EOR_ABS,`EOR_ABSX,`EOR_RIND: begin res <= a ^ b; end
|
`LDX_ZPY,`LDX_ABS,`LDX_ABSY: begin res <= b; end
|
`LDX_ZPY,`LDX_ABS,`LDX_ABSY: begin res <= b; end
|
`LDY_ZPX,`LDY_ABS,`LDY_ABSX: begin res <= b; end
|
`LDY_ZPX,`LDY_ABS,`LDY_ABSX: begin res <= b; end
|
