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add Commen Units

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Marcel
2019-07-22 23:42:05 +02:00
parent fa65ff3c9f
commit 462f0490bd
512 changed files with 133512 additions and 5 deletions
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68
common/CPU/x86/microcode/scas.us Normal file
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// Copyright Jamie Iles, 2017
//
// This file is part of s80x86.
//
// s80x86 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// s80x86 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with s80x86. If not, see <http://www.gnu.org/licenses/>.
.at 0xae;
jmp scasb, ra_sel DI;
.auto_address;
scasb:
ra_sel DI, a_sel RA, alu_op SELA, mar_wr_sel Q, mar_write, rb_cl,
jmp_if_not_rep scasb_no_rep;
scasb_rep_loop:
ra_sel CX, jmp_rb_zero scasb_done;
ra_sel DI, a_sel RA, b_sel IMMEDIATE, immediate 0x1, alu_op SUB,
rd_sel_source MICROCODE_RD_SEL, rd_sel CX, segment ES, segment_force;
scasb_no_rep:
width W8, segment ES, segment_force, mem_read, ra_sel AL,
a_sel RA, alu_op SELA, tmp_wr_en;
width W8, a_sel MDR, b_sel TEMP, alu_op SUBREV,
update_flags OF SF ZF CF PF AF, jmp_if_not_rep scasb_done_no_rep;
a_sel MAR, b_sel IMMEDIATE, immediate 0x1, alu_op NEXT,
rd_sel_source MICROCODE_RD_SEL, rd_sel DI, mar_write, mar_wr_sel Q,
rb_cl, ext_int_yield, jmp_if_rep_not_complete scasb_rep_loop,
segment ES, segment_force;
scasb_done:
next_instruction;
scasb_done_no_rep:
a_sel MAR, b_sel IMMEDIATE, immediate 0x1, alu_op NEXT,
rd_sel_source MICROCODE_RD_SEL, rd_sel DI, next_instruction;
.at 0xaf;
jmp scasw, ra_sel DI;
.auto_address;
scasw:
ra_sel DI, a_sel RA, alu_op SELA, mar_wr_sel Q, mar_write,
rb_cl, jmp_if_not_rep scasw_no_rep;
scasw_rep_loop:
ra_sel CX, jmp_rb_zero scasw_done;
ra_sel DI, a_sel RA, b_sel IMMEDIATE, immediate 0x1, alu_op SUB,
rd_sel_source MICROCODE_RD_SEL, rd_sel CX, segment ES, segment_force;
scasw_no_rep:
segment ES, segment_force, mem_read, ra_sel AX, a_sel RA, alu_op SELA,
tmp_wr_en;
a_sel MDR, b_sel TEMP, alu_op SUBREV, update_flags OF SF ZF CF PF AF,
jmp_if_not_rep scasw_done_no_rep;
a_sel MAR, b_sel IMMEDIATE, immediate 0x2, alu_op NEXT,
rd_sel_source MICROCODE_RD_SEL, rd_sel DI, mar_write, mar_wr_sel Q,
rb_cl, ext_int_yield, jmp_if_rep_not_complete scasw_rep_loop,
segment ES, segment_force;
scasw_done:
next_instruction;
scasw_done_no_rep:
a_sel MAR, b_sel IMMEDIATE, immediate 0x2, alu_op NEXT,
rd_sel_source MICROCODE_RD_SEL, rd_sel DI, next_instruction;