diff options
| author | Michael Snyder <msnyder@specifix.com> | 2003-04-13 17:06:29 +0000 |
|---|---|---|
| committer | Michael Snyder <msnyder@specifix.com> | 2003-04-13 17:06:29 +0000 |
| commit | 8b9babcaacaafd5942c05cf098049e3f151e0c31 (patch) | |
| tree | f38e28f83517c22dd7e4c63e872a10029322e0a3 /sim | |
| parent | 938b128484b45e8486f0453b8f0401651b298ed8 (diff) | |
| download | gdb-8b9babcaacaafd5942c05cf098049e3f151e0c31.tar.gz | |
2003-04-13 Michael Snyder <msnyder@redhat.com>
* compile.c (sim_resume): Implement 'daa' and 'das' instructions.
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/h8300/ChangeLog | 4 | ||||
| -rw-r--r-- | sim/h8300/compile.c | 51 |
2 files changed, 55 insertions, 0 deletions
diff --git a/sim/h8300/ChangeLog b/sim/h8300/ChangeLog index c3d79ba750c..600e9cc08a9 100644 --- a/sim/h8300/ChangeLog +++ b/sim/h8300/ChangeLog @@ -1,3 +1,7 @@ +2003-04-13 Michael Snyder <msnyder@redhat.com> + + * compile.c (sim_resume): Implement 'daa' and 'das' instructions. + 2003-03-20 D.Venkatasubramanian <dvenkat@noida.hcltech.com> * compile.c (cmdline_location): Added function to diff --git a/sim/h8300/compile.c b/sim/h8300/compile.c index 54a06591338..0e4b6d2b291 100644 --- a/sim/h8300/compile.c +++ b/sim/h8300/compile.c @@ -2138,6 +2138,57 @@ sim_resume (SIM_DESC sd, int step, int siggnal) } goto next; + case O (O_DAA, SB): + /* Decimal Adjust Addition. This is for BCD arithmetic. */ + res = GET_B_REG (code->src.reg); + if (!c && (0 <= (res >> 4) && (res >> 4) <= 9) + && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9)) + res = res; /* Value added == 0. */ + else if (!c && (0 <= (res >> 4) && (res >> 4) <= 8) + && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15)) + res = res + 0x6; /* Value added == 6. */ + else if (!c && (0 <= (res >> 4) && (res >> 4) <= 9) + && h && (0 <= (res & 0xf) && (res & 0xf) <= 3)) + res = res + 0x6; /* Value added == 6. */ + else if (!c && (10 <= (res >> 4) && (res >> 4) <= 15) + && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9)) + res = res + 0x60; /* Value added == 60. */ + else if (!c && (9 <= (res >> 4) && (res >> 4) <= 15) + && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15)) + res = res + 0x66; /* Value added == 66. */ + else if (!c && (10 <= (res >> 4) && (res >> 4) <= 15) + && h && (0 <= (res & 0xf) && (res & 0xf) <= 3)) + res = res + 0x66; /* Value added == 66. */ + else if (c && (1 <= (res >> 4) && (res >> 4) <= 2) + && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9)) + res = res + 0x160; /* Value added == 60, plus 'carry'. */ + else if (c && (1 <= (res >> 4) && (res >> 4) <= 2) + && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15)) + res = res + 0x166; /* Value added == 66, plus 'carry'. */ + else if (c && (1 <= (res >> 4) && (res >> 4) <= 3) + && h && (0 <= (res & 0xf) && (res & 0xf) <= 3)) + res = res + 0x166; /* Value added == 66, plus 'carry'. */ + + goto alu8; + + case O (O_DAS, SB): + /* Decimal Adjust Subtraction. This is for BCD arithmetic. */ + res = GET_B_REG (code->src.reg); /* FIXME fetch, fetch2... */ + if (!c && (0 <= (res >> 4) && (res >> 4) <= 9) + && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9)) + res = res; /* Value added == 0. */ + else if (!c && (0 <= (res >> 4) && (res >> 4) <= 8) + && h && (6 <= (res & 0xf) && (res & 0xf) <= 15)) + res = res + 0xfa; /* Value added == 0xfa. */ + else if (c && (7 <= (res >> 4) && (res >> 4) <= 15) + && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9)) + res = res + 0xa0; /* Value added == 0xa0. */ + else if (c && (6 <= (res >> 4) && (res >> 4) <= 15) + && h && (6 <= (res & 0xf) && (res & 0xf) <= 15)) + res = res + 0x9a; /* Value added == 0x9a. */ + + goto alu8; + default: illegal: cpu.state = SIM_STATE_STOPPED; |