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[/] [hive/] [trunk/] [v01.10/] [op_encode.h] - Rev 3
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// `define nn 3'b000 `define eq 3'b001 `define lt 3'b010 `define le 3'b011 `define gt 3'b100 `define ge 3'b101 `define gl 3'b110 `define yy 3'b111 // localparam OP_W = 10; // // immediate read - 32 codes localparam [OP_W-1:0] op_rd_i = { 2'b00, `nn, 1'b0, 4'bxxxx }; // mem(B+I[3:0]) => A read immediate w/ offset (signed) localparam [OP_W-1:0] op_rd_ix = { 2'b00, `nn, 1'b1, 4'bxxxx }; // {mem(B+I[3:0]), A[lo]} => A read immediate extended w/ offset // immediate conditional jump - 192 codes localparam [OP_W-1:0] op_jmp_iez = { 2'b00, `eq, 5'bxxxxx }; // (A?0) PC+I[4:0] => PC jump relative immediate conditional localparam [OP_W-1:0] op_jmp_ilz = { 2'b00, `lt, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_ilez = { 2'b00, `le, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_igz = { 2'b00, `gt, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_igez = { 2'b00, `ge, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_iglz = { 2'b00, `gl, 5'bxxxxx }; // immediate unconditional jump - 32 codes localparam [OP_W-1:0] op_jmp_i = { 2'b00, `yy, 5'bxxxxx }; // immediate write - 32 codes localparam [OP_W-1:0] op_wr_i = { 2'b01, `nn, 1'b0, 4'bxxxx }; // A[lo] => mem(B+I[3:0]) write immediate w/ offset localparam [OP_W-1:0] op_wr_ix = { 2'b01, `nn, 1'b1, 4'bxxxx }; // A[hi] => mem(B+I[3:0]) write immediate extended w/ offset // immediate conditional jump - 192 codes localparam [OP_W-1:0] op_jmp_ie = { 2'b01, `eq, 5'bxxxxx }; // (A?B) PC+I[4:0] => PC jump relative immediate conditional localparam [OP_W-1:0] op_jmp_il = { 2'b01, `lt, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_ile = { 2'b01, `le, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_iug = { 2'b01, `gt, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_iuge = { 2'b01, `ge, 5'bxxxxx }; localparam [OP_W-1:0] op_jmp_igl = { 2'b01, `gl, 5'bxxxxx }; // 32 unused codes // // immediate byte - 256 codes localparam [OP_W-1:0] op_byt_i = { 2'b10, 8'bxxxxxxxx }; // I[7:0] => A byte immediate (signed) // immediate shift - 128 codes localparam [OP_W-1:0] op_shl_i = { 4'hc, 6'bxxxxxx }; // A<<I => A shift left A (signed) immediate localparam [OP_W-1:0] op_shl_iu = { 4'hd, 6'bxxxxxx }; // 1<<I | A<<I => A shift left immediate unsigned // immediate add - 64 codes localparam [OP_W-1:0] op_add_i = { 4'he, 6'bxxxxxx }; // A+I[5:0] => A add immediate (I signed) // conditional jump - 7 of 8 codes localparam [OP_W-1:0] op_jmp_ez = { 4'hf, 3'b000, `eq }; // (A?0) PC+B[lo] => PC jump relative conditional localparam [OP_W-1:0] op_jmp_lz = { 4'hf, 3'b000, `lt }; localparam [OP_W-1:0] op_jmp_lez = { 4'hf, 3'b000, `le }; localparam [OP_W-1:0] op_jmp_gz = { 4'hf, 3'b000, `gt }; localparam [OP_W-1:0] op_jmp_gez = { 4'hf, 3'b000, `ge }; localparam [OP_W-1:0] op_jmp_glz = { 4'hf, 3'b000, `gl }; localparam [OP_W-1:0] op_jmp = { 4'hf, 3'b000, `yy }; // conditional goto - 7 of 8 codes localparam [OP_W-1:0] op_gto_ez = { 4'hf, 3'b001, `eq }; // (A?0) B[lo] => PC jump absolute conditional localparam [OP_W-1:0] op_gto_lz = { 4'hf, 3'b001, `lt }; localparam [OP_W-1:0] op_gto_lez = { 4'hf, 3'b001, `le }; localparam [OP_W-1:0] op_gto_gz = { 4'hf, 3'b001, `gt }; localparam [OP_W-1:0] op_gto_gez = { 4'hf, 3'b001, `ge }; localparam [OP_W-1:0] op_gto_glz = { 4'hf, 3'b001, `gl }; localparam [OP_W-1:0] op_gto = { 4'hf, 3'b001, `yy }; // singles - 48 codes localparam [OP_W-1:0] op_add = { 4'hf, 2'b01, 4'h0 }; // A+B => A add localparam [OP_W-1:0] op_add_x = { 4'hf, 2'b01, 4'h2 }; // A+B => A add extended (signed) localparam [OP_W-1:0] op_add_ux = { 4'hf, 2'b01, 4'h3 }; // A+B => A add extended unsigned localparam [OP_W-1:0] op_sub = { 4'hf, 2'b01, 4'h4 }; // A-B => A subtract localparam [OP_W-1:0] op_sub_x = { 4'hf, 2'b01, 4'h6 }; // A-B => A subtract extended (signed) localparam [OP_W-1:0] op_sub_ux = { 4'hf, 2'b01, 4'h7 }; // A-B => A subtract extended unsigned localparam [OP_W-1:0] op_mul = { 4'hf, 2'b01, 4'h8 }; // A*B => A multiply localparam [OP_W-1:0] op_mul_x = { 4'hf, 2'b01, 4'ha }; // A*B => A multiply extended (signed) localparam [OP_W-1:0] op_mul_ux = { 4'hf, 2'b01, 4'hb }; // A*B => A multiply extended unsigned localparam [OP_W-1:0] op_shl = { 4'hf, 2'b01, 4'hc }; // A<<B => A shift left A (signed) localparam [OP_W-1:0] op_shl_u = { 4'hf, 2'b01, 4'hd }; // 1<<B | A<<B => A 2^B | shift left A unsigned // localparam [OP_W-1:0] op_and = { 4'hf, 2'b10, 4'h0 }; // A&B => A logical AND localparam [OP_W-1:0] op_or = { 4'hf, 2'b10, 4'h1 }; // A|B => A logical OR localparam [OP_W-1:0] op_xor = { 4'hf, 2'b10, 4'h2 }; // A^B => A logical XOR localparam [OP_W-1:0] op_not = { 4'hf, 2'b10, 4'h3 }; // ~B => A logical NOT localparam [OP_W-1:0] op_and_b = { 4'hf, 2'b10, 4'h4 }; // &B => A logical AND bit reduction localparam [OP_W-1:0] op_or_b = { 4'hf, 2'b10, 4'h5 }; // |B => A logical OR bit reduction localparam [OP_W-1:0] op_xor_b = { 4'hf, 2'b10, 4'h6 }; // ^B => A logical XOR bit reduction // localparam [OP_W-1:0] op_lit = { 4'hf, 2'b11, 4'h0 }; // mem(PC) => A literal low (signed) localparam [OP_W-1:0] op_lit_u = { 4'hf, 2'b11, 4'h1 }; // mem(PC) => A literal low unsigned localparam [OP_W-1:0] op_lit_x = { 4'hf, 2'b11, 4'h2 }; // {mem(PC),A[lo]} => A literal extended localparam [OP_W-1:0] op_cpy = { 4'hf, 2'b11, 4'h4 }; // B => A copy localparam [OP_W-1:0] op_pc = { 4'hf, 2'b11, 4'h8 }; // PC => A read PC (unsigned) localparam [OP_W-1:0] op_gsb = { 4'hf, 2'b11, 4'h9 }; // B[lo] => PC, PC => A subroutine call localparam [OP_W-1:0] op_cls = { 4'hf, 2'b11, 4'hc }; // clear stacks localparam [OP_W-1:0] op_pop = { 4'hf, 2'b11, 4'he }; // do nothing (but allow pops) localparam [OP_W-1:0] op_nop = { 4'hf, 2'b11, 4'hf }; // do nothing (no pops either)