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/* |
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* asm_support.s - Utility functions in assemmbly language (for native 68k support) |
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* asm_support.s - Utility functions in assembly language (for native 68k support) |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* Basilisk II (C) 1997-2005 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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.globl _ClearInterruptFlag__FUi |
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.globl _Execute68k |
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.globl _Execute68kTrap |
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.globl _Scod060Patch1 |
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.globl _Scod060Patch2 |
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.globl _ThInitFPUPatch |
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.globl _EmulOpTrampoline |
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.globl _RAMBaseHost |
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eot1: moveml sp@+,d0-d7/a0-a6 |Restore registers |
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addql #4,sp |Skip saved SP |
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rtr |
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/* |
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* Process Manager 68060 FPU patches |
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*/ |
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.type _Scod060Patch1,@function |
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_Scod060Patch1: fsave sp@- |Save FPU state |
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tstb sp@(2) |Null? |
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beqs sc1 |
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fmovemx fp0-fp7,sp@- |No, save FPU registers |
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fmovel fpi,sp@- |
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fmovel fpsr,sp@- |
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fmovel fpcr,sp@- |
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pea -1 |Push "FPU state saved" flag |
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sc1: movl d1,sp@- |
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movl d0,sp@- |
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bsrs sc3 |Switch integer registers and stack |
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addql #8,sp |
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tstb sp@(2) |New FPU state null or "FPU state saved" flag set? |
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beqs sc2 |
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addql #4,sp |Flag set, skip it |
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fmovel sp@+,fpcr |Restore FPU registers and state |
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fmovel sp@+,fpsr |
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fmovel sp@+,fpi |
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fmovemx sp@+,fp0-fp7 |
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sc2: frestore sp@+ |
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movml sp@+,d0-d1 |
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rts |
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sc3: movl sp@(4),a0 |Switch integer registers and stack |
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movw sr,sp@- |
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movml d2-d7/a2-a6,sp@- |
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cmpw #0,a0 |
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beqs sc4 |
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movl sp,a0@ |
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sc4: movl sp@(0x36),a0 |
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movml a0@+,d2-d7/a2-a6 |
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movw a0@+,sr |
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movl a0,sp |
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rts |
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.type _Scod060Patch2,@function |
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_Scod060Patch2: movl d0,sp@- |Create 68060 null frame on stack |
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movl d0,sp@- |
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movl d0,sp@- |
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frestore sp@+ |and load it |
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rts |
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/* |
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* Thread Manager 68060 FPU patches |
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*/ |
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.type _ThInitFPUPatch,@function |
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_ThInitFPUPatch: |
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tstb a4@(0x40) |
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bnes th1 |
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moveq #0,d0 |Create 68060 null frame on stack |
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movl d0,a3@- |
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movl d0,a3@- |
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movl d0,a3@- |
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th1: rts |
