X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/df770340caf8ecd26a55179484edb507082bd5c6..8e2bb38447e731bbba10c39cfb995b9b4eccd22c:/insn_jr-jrcc.v?ds=sidebyside diff --git a/insn_jr-jrcc.v b/insn_jr-jrcc.v index 7a869b3..767db6a 100644 --- a/insn_jr-jrcc.v +++ b/insn_jr-jrcc.v @@ -2,25 +2,22 @@ `INSN_JR_imm,`INSN_JRCC_imm: begin case (cycle) 0: begin - `EXEC_INC_PC; - `EXEC_NEXTADDR_PCINC; - rd <= 1; + `EXEC_INC_PC + `EXEC_READ(`_PC + 1) end - 1: begin - `EXEC_INC_PC; + 1: begin + `EXEC_INC_PC if (opcode[5]) begin // i.e., JP cc,nn /* We need to check the condition code to bail out. */ case (opcode[4:3]) - `INSN_cc_NZ: if (registers[`REG_F][7]) begin `EXEC_NEWCYCLE; end - `INSN_cc_Z: if (~registers[`REG_F][7]) begin `EXEC_NEWCYCLE; end - `INSN_cc_NC: if (registers[`REG_F][4]) begin `EXEC_NEWCYCLE; end - `INSN_cc_C: if (~registers[`REG_F][4]) begin `EXEC_NEWCYCLE; end + `INSN_cc_NZ: if (`_F[7]) `EXEC_NEWCYCLE + `INSN_cc_Z: if (~`_F[7]) `EXEC_NEWCYCLE + `INSN_cc_NC: if (`_F[4]) `EXEC_NEWCYCLE + `INSN_cc_C: if (~`_F[4]) `EXEC_NEWCYCLE endcase end end - 2: begin - `EXEC_NEWCYCLE; - end + 2: `EXEC_NEWCYCLE endcase end `endif @@ -30,9 +27,7 @@ case (cycle) 0: begin /* type F */ end 1: tmp <= rdata; - 2: {registers[`REG_PCH],registers[`REG_PCL]} <= - {registers[`REG_PCH],registers[`REG_PCL]} + - {tmp[7]?8'hFF:8'h00,tmp}; + 2: `_PC <= `_PC + {tmp[7]?8'hFF:8'h00,tmp}; endcase end `endif