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2003-04-13 Michael Snyder <msnyder@redhat.com> 

* compile.c (sim_resume): Implement 'daa' and 'das' instructions.
This commit is contained in:
Michael Snyder 2003-04-13 17:06:29 +00:00
parent a68f3a3f68
commit b7f97e9cb4
2 changed files with 55 additions and 0 deletions
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4
sim/h8300/ChangeLog
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@ -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

51
sim/h8300/compile.c
View File

@ -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;