URL
https://opencores.org/ocsvn/m32632/m32632/trunk
Subversion Repositories m32632
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- This comparison shows the changes necessary to convert path
/m32632/trunk
- from Rev 14 to Rev 15
- ↔ Reverse comparison
Rev 14 → Rev 15
/rtl/I_PFAD.v
4,11 → 4,12
// http://opencores.org/project,m32632 |
// |
// Filename: I_PFAD.v |
// Version: 1.1 bug fix |
// Version: 1.2 bug fix |
// Version: 1.1 bug fix release of 7 November 2015 |
// History: 1.0 first release of 30 Mai 2015 |
// Date: 7 November 2015 |
// Date: 4 February 2016 |
// |
// Copyright (C) 2015 Udo Moeller |
// Copyright (C) 2016 Udo Moeller |
// |
// This source file may be used and distributed without |
// restriction provided that this copyright statement is not |
574,7 → 575,7
// ++++++++++++++ Format 4 Opcodes : Basic Integer Opcodes, MOVi is special case +++++++++++++ |
|
reg cy_in; |
reg get_psr,rd_psr,rd_dsr; |
reg get_psr,rd_psr,rd_dsr,get_mod; |
wire add_flag; |
|
always @(BWD or SRC1) |
600,11 → 601,13
always @(posedge BCLK) get_psr <= (RDAA == 8'h9D) | (RDAA == 8'h90) | (RDAA == 8'h93); // PSR or US or DSR is read |
always @(posedge BCLK) rd_psr <= (RDAA[1:0] == 2'b01); |
always @(posedge BCLK) rd_dsr <= (RDAA[1:0] == 2'b11); |
always @(posedge BCLK) get_mod <= (RDAA == 8'h9F); |
|
always @(OPCODE or SRC1 or SRC2 or get_psr or rd_psr or rd_dsr or DSR or PSR or ADDR) |
always @(OPCODE or SRC1 or SRC2 or get_psr or rd_psr or rd_dsr or get_mod or DSR or PSR or ADDR) |
casex (OPCODE[3:1]) |
3'b001 : pfad_4a = SRC2 & ~SRC1; // BIC |
3'bx10 : pfad_4a = get_psr ? {({4{rd_dsr}} & DSR),16'd0,({4{rd_psr}} & PSR[11:8]),({8{~rd_dsr}} & PSR[7:0])} : SRC1; // MOV |
3'bx10 : pfad_4a = get_psr ? {({4{rd_dsr}} & DSR),16'd0,({4{rd_psr}} & PSR[11:8]),({8{~rd_dsr}} & PSR[7:0])} // MOV |
: (get_mod ? {16'd0,SRC1[15:0]} : SRC1); |
3'b011 : pfad_4a = SRC2 | SRC1; // OR |
3'b101 : pfad_4a = SRC2 & SRC1; // AND |
3'b111 : pfad_4a = SRC2 ^ SRC1; // XOR |