Mercurial > repos > blastem

annotate runtime.S @ 559:6b248602ab84

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blastem builds and almost works on OS X now
author Mike Pavone <pavone@retrodev.com>
date Tue, 17 Jun 2014 01:50:29 -0400
parents 3090d016c9e9
children 7ed1dbb48f61
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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17
de0085d4ea40 Add asssembly runtime code stub
Mike Pavone <pavone@retrodev.com>
parents:
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485
b449af228c63 Follow amd64 ABI stack alignment requirements in places it matters so we can call sprintf with floating point arguments without crashing
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194
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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3 .global bcd_add
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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4 bcd_add:
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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5 xchg %rax, %rdi
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6
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811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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7 mov %cl, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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8 mov %al, %ah
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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9 and $0xF, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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10 and $0xF, %ah
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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11 and $0xF0, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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12 and $0xF0, %al
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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13 add %ah, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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14 cmp $10, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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15 jb no_adjust
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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16 add $6, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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17 no_adjust:
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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18 add %ch, %al
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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19 add %al, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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20 mov $0, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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21 jc def_adjust
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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22 cmp $0xA0, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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23 jb no_adjust_h
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24 def_adjust:
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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25 add $0x60, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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26 mov $1, %ch
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27 no_adjust_h:
485
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Mike Pavone <pavone@retrodev.com>
parents: 423
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29 mov %rdi, %rax
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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30 ret
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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31
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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32 .global bcd_sub
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33 bcd_sub:
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34 xchg %rax, %rdi
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parents: 423
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811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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36 mov %cl, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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37 mov %al, %ah
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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38 and $0xF, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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39 and $0xF, %ah
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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40 and $0xF0, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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41 and $0xF0, %al
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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42 sub %ah, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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43 cmp $10, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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44 jb no_adjusts
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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45 sub $6, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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46 no_adjusts:
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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47 add %ch, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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48 sub %al, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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49 mov $0, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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50 jc def_adjusts
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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51 cmp $0xA0, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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52 jb no_adjust_hs
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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53 def_adjusts:
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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parents: 193
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54 sub $0x60, %cl
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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55 mov $1, %ch
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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56 no_adjust_hs:
485
b449af228c63 Follow amd64 ABI stack alignment requirements in places it matters so we can call sprintf with floating point arguments without crashing
Mike Pavone <pavone@retrodev.com>
parents: 423
diff changeset
57
194
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
Mike Pavone <pavone@retrodev.com>
parents: 193
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58 mov %rdi, %rax
811163790e6c Implement ABCD an SBCD. Fix BTEST with register source.
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59 ret
82
6331ddec228f Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
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6331ddec228f Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
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6331ddec228f Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents: 72
diff changeset
62