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Add CMP emulation and test cases.

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This commit is contained in:
Radosław Kujawa 2017-01-28 13:26:51 +01:00
parent f3205e7272
commit 3640a162a3
13 changed files with 156 additions and 10 deletions
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18
src/65c02isa.csv
View File

@ -192,35 +192,35 @@ OP_LDA_ABSX,"lda",ABSOLUTEX,3,emul_lda,false
OP_LDX_ABSY,"ldx",ABSOLUTEY,3,emul_ldx,false
OP_BBS3_REL,"bbs3",ZPR,2,NULL,true
OP_CPY_IMM,"cpy",IMMEDIATE,2,NULL,false
OP_CMP_IZPX,"cmp",IZPX,2,NULL,false
OP_CMP_IZPX,"cmp",IZPX,2,emul_cmp,false
OP_NOPI_C3,"nop",IMMEDIATE,2,NULL,false
OP_NOPI_C4,"nop",IMPLIED,1,NULL,false
OP_CPY_ZP,"cpy",ZP,2,NULL,false
OP_CMP_ZP,"cmp",ZP,2,NULL,false
OP_CMP_ZP,"cmp",ZP,2,emul_cmp,false
OP_DEC_ZP,"dec",ZP,2,emul_dec,false
OP_SMB4_ZP,"smb4",ZP,2,NULL,false
OP_INY,"iny",IMPLIED,1,emul_iny,false
OP_CMP_IMM,"cmp",IMMEDIATE,2,NULL,false
OP_CMP_IMM,"cmp",IMMEDIATE,2,emul_cmp,false
OP_DEX,"dex",IMPLIED,1,emul_dex,false
OP_WAI,"wai",IMPLIED,1,NULL,false
OP_CPY_ABS,"cpy",ABSOLUTE,3,NULL,false
OP_CMP_ABS,"cmp",ABSOLUTE,3,NULL,false
OP_CMP_ABS,"cmp",ABSOLUTE,3,emul_cmp,false
OP_DEC_ABS,"dec",ABSOLUTE,3,emul_dec,false
OP_BBS4_REL,"bbs4",ZPR,2,NULL,true
OP_BNE_REL,"bne",RELATIVE,2,NULL,true
OP_CMP_IZPY,"cmp",IZPY,2,NULL,false
OP_CMP_IZP,"cmp",IZP,2,NULL,false
OP_CMP_IZPY,"cmp",IZPY,2,emul_cmp,false
OP_CMP_IZP,"cmp",IZP,2,emul_cmp,false
OP_NOPI_D4,"nop",IMPLIED,1,NULL,false
OP_NOPI_D5,"nop",ZPX,2,NULL,false
OP_CMP_ZPX,"cmp",ZPX,2,NULL,false
OP_CMP_ZPX,"cmp",ZPX,2,emul_cmp,false
OP_DEC_ZPX,"dec",ZPX,2,emul_dec,false
OP_SMB5_ZP,"smb5",ZP,2,NULL,false
OP_CLD,"cld",IMPLIED,1,NULL,false
OP_CMP_ABSY,"cmp",ABSOLUTEY,3,NULL,false
OP_CMP_ABSY,"cmp",ABSOLUTEY,3,emul_cmp,false
OP_PHX,"phx",IMPLIED,1,emul_phx,false
OP_STP,"stp",IMPLIED,1,emul_stp,false
OP_NOPI_DD,"nop",ABSOLUTE,3,NULL,false
OP_CMP_ABSX,"cmp",ABSOLUTEX,3,NULL,false
OP_CMP_ABSX,"cmp",ABSOLUTEX,3,emul_cmp,false
OP_DEC_ABSX,"dec",ABSOLUTEX,3,emul_dec,false
OP_BBS5_REL,"bbs5",ZPR,2,NULL,true
OP_CPX_IMM,"cpx",IMMEDIATE,2,NULL,false

1 opcode_id mnemonic addressing size emulation modify_pc
192 OP_LDX_ABSY ldx ABSOLUTEY 3 emul_ldx false
193 OP_BBS3_REL bbs3 ZPR 2 NULL true
194 OP_CPY_IMM cpy IMMEDIATE 2 NULL false
195 OP_CMP_IZPX cmp IZPX 2 NULL emul_cmp false
196 OP_NOPI_C3 nop IMMEDIATE 2 NULL false
197 OP_NOPI_C4 nop IMPLIED 1 NULL false
198 OP_CPY_ZP cpy ZP 2 NULL false
199 OP_CMP_ZP cmp ZP 2 NULL emul_cmp false
200 OP_DEC_ZP dec ZP 2 emul_dec false
201 OP_SMB4_ZP smb4 ZP 2 NULL false
202 OP_INY iny IMPLIED 1 emul_iny false
203 OP_CMP_IMM cmp IMMEDIATE 2 NULL emul_cmp false
204 OP_DEX dex IMPLIED 1 emul_dex false
205 OP_WAI wai IMPLIED 1 NULL false
206 OP_CPY_ABS cpy ABSOLUTE 3 NULL false
207 OP_CMP_ABS cmp ABSOLUTE 3 NULL emul_cmp false
208 OP_DEC_ABS dec ABSOLUTE 3 emul_dec false
209 OP_BBS4_REL bbs4 ZPR 2 NULL true
210 OP_BNE_REL bne RELATIVE 2 NULL true
211 OP_CMP_IZPY cmp IZPY 2 NULL emul_cmp false
212 OP_CMP_IZP cmp IZP 2 NULL emul_cmp false
213 OP_NOPI_D4 nop IMPLIED 1 NULL false
214 OP_NOPI_D5 nop ZPX 2 NULL false
215 OP_CMP_ZPX cmp ZPX 2 NULL emul_cmp false
216 OP_DEC_ZPX dec ZPX 2 emul_dec false
217 OP_SMB5_ZP smb5 ZP 2 NULL false
218 OP_CLD cld IMPLIED 1 NULL false
219 OP_CMP_ABSY cmp ABSOLUTEY 3 NULL emul_cmp false
220 OP_PHX phx IMPLIED 1 emul_phx false
221 OP_STP stp IMPLIED 1 emul_stp false
222 OP_NOPI_DD nop ABSOLUTE 3 NULL false
223 OP_CMP_ABSX cmp ABSOLUTEX 3 NULL emul_cmp false
224 OP_DEC_ABSX dec ABSOLUTEX 3 emul_dec false
225 OP_BBS5_REL bbs5 ZPR 2 NULL true
226 OP_CPX_IMM cpx IMMEDIATE 2 NULL false

18
src/emulation.c
View File

@ -86,6 +86,24 @@ emul_clv(rk65c02emu_t *e, void *id, instruction_t *i)
e->regs.P &= ~P_SIGN_OVERFLOW;
}
/* CMP - compare accumulator and memory location */
void
emul_cmp(rk65c02emu_t *e, void *id, instruction_t *i)
{
uint8_t val, sr;
val = instruction_data_read_1(e, (instrdef_t *) id, i);
sr = e->regs.A - val;
instruction_status_adjust_zero(e, sr);
instruction_status_adjust_negative(e, sr);
if (e->regs.A < val)
e->regs.P |= P_CARRY;
else
e->regs.P &= ~P_CARRY;
}
/* DEC - decrement memory location/acumulator */
void
emul_dec(rk65c02emu_t *e, void *id, instruction_t *i)

1
src/instruction.c
View File

@ -233,7 +233,6 @@ uint8_t
instruction_data_read_1(rk65c02emu_t *e, instrdef_t *id, instruction_t *i)
{
uint8_t rv; /* data read from the bus */
// uint8_t ziaddr; /* indirect zero page address */
uint16_t iaddr; /* indirect address */
rv = 0;

103
test/test_emulation.c
View File

@ -57,6 +57,108 @@ ATF_TC_BODY(emul_bit, tc)
bus_finish(&b);
}
ATF_TC_WITHOUT_HEAD(emul_cmp);
ATF_TC_BODY(emul_cmp, tc)
{
rk65c02emu_t e;
bus_t b;
b = bus_init();
e = rk65c02_init(&b);
/* CMP immediate */
e.regs.A = 0xAA;
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_imm.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(e.regs.P & P_ZERO);
ATF_CHECK(!(e.regs.P & P_CARRY));
ATF_CHECK(!(e.regs.P & P_NEGATIVE));
/* CMP zero page */
e.regs.A = 0xAA;
bus_write_1(&b, 0x10, 0xAB);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_zp.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(!(e.regs.P & P_ZERO));
ATF_CHECK(e.regs.P & P_CARRY);
ATF_CHECK(e.regs.P & P_NEGATIVE);
/* CMP zero page X */
e.regs.A = 0xAA;
e.regs.X = 0x1;
bus_write_1(&b, 0x11, 0xA0);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_zpx.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(!(e.regs.P & P_ZERO));
ATF_CHECK(!(e.regs.P & P_CARRY));
ATF_CHECK(!(e.regs.P & P_NEGATIVE));
/* CMP indirect zero page */
e.regs.A = 0x01;
bus_write_1(&b, 0x20, 0x0);
bus_write_1(&b, 0x21, 0x20);
bus_write_1(&b, 0x2000, 0xFF);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_izp.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(!(e.regs.P & P_ZERO));
ATF_CHECK(e.regs.P & P_CARRY);
ATF_CHECK(!(e.regs.P & P_NEGATIVE));
/* CMP indirect zero page X */
e.regs.A = 0x02;
e.regs.X = 0x02;
bus_write_1(&b, 0x22, 0x0);
bus_write_1(&b, 0x23, 0x20);
bus_write_1(&b, 0x2000, 0x3);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_izpx.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(!(e.regs.P & P_ZERO));
ATF_CHECK(e.regs.P & P_CARRY);
ATF_CHECK(e.regs.P & P_NEGATIVE);
/* CMP indirect zero page Y */
e.regs.A = 0x10;
e.regs.Y = 0x01;
bus_write_1(&b, 0x22, 0x0);
bus_write_1(&b, 0x23, 0x20);
bus_write_1(&b, 0x2000, 0xF);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_izpy.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(e.regs.P & P_ZERO);
ATF_CHECK(!(e.regs.P & P_CARRY));
ATF_CHECK(!(e.regs.P & P_NEGATIVE));
/* CMP absolute */
e.regs.A = 0xFF;
bus_write_1(&b, 0x2010, 0xFE);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_abs.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(!(e.regs.P & P_ZERO));
ATF_CHECK(!(e.regs.P & P_CARRY));
ATF_CHECK(!(e.regs.P & P_NEGATIVE));
/* CMP absolute X */
e.regs.A = 0x55;
e.regs.X = 0x2;
bus_write_1(&b, 0x2012, 0x55);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_absx.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(e.regs.P & P_ZERO);
ATF_CHECK(!(e.regs.P & P_CARRY));
ATF_CHECK(!(e.regs.P & P_NEGATIVE));
/* CMP absolute Y */
e.regs.A = 0xAA;
e.regs.Y = 0x50;
bus_write_1(&b, 0x2065, 0x55);
rk65c02_dump_regs(&e);
ATF_REQUIRE(rom_start(&e, "test_emulation_cmp_absy.rom", tc));
rk65c02_dump_regs(&e);
ATF_CHECK(!(e.regs.P & P_ZERO));
ATF_CHECK(!(e.regs.P & P_CARRY));
ATF_CHECK(e.regs.P & P_NEGATIVE);
}
ATF_TC_WITHOUT_HEAD(emul_dex_dey);
ATF_TC_BODY(emul_dex_dey, tc)
{
@ -698,6 +800,7 @@ ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, emul_and);
ATF_TP_ADD_TC(tp, emul_bit);
ATF_TP_ADD_TC(tp, emul_cmp);
ATF_TP_ADD_TC(tp, emul_dec);
ATF_TP_ADD_TC(tp, emul_dex_dey);
ATF_TP_ADD_TC(tp, emul_clc_sec);

3
test/test_emulation_cmp_abs.s Normal file
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@ -0,0 +1,3 @@
start: cmp 0x2010
stp

3
test/test_emulation_cmp_absx.s Normal file
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@ -0,0 +1,3 @@
start: cmp 0x2010,X
stp

3
test/test_emulation_cmp_absy.s Normal file
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@ -0,0 +1,3 @@
start: cmp 0x2010,Y
stp

3
test/test_emulation_cmp_imm.s Normal file
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@ -0,0 +1,3 @@
start: cmp #0xAA
stp

3
test/test_emulation_cmp_izp.s Normal file
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@ -0,0 +1,3 @@
start: cmp (0x20)
stp

3
test/test_emulation_cmp_izpx.s Normal file
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@ -0,0 +1,3 @@
start: cmp (0x20,X)
stp

3
test/test_emulation_cmp_izpy.s Normal file
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@ -0,0 +1,3 @@
start: cmp (0x20),Y
stp

3
test/test_emulation_cmp_zp.s Normal file
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@ -0,0 +1,3 @@
start: cmp 0x10
stp

2
test/test_emulation_cmp_zpx.s Normal file
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@ -0,0 +1,2 @@
start: cmp 0x10,X
stp