132 lines
3.8 KiB
ArmAsm
Executable File
132 lines
3.8 KiB
ArmAsm
Executable File
#include "asm.h"
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/* Note that the XT is passed to the quotation in r12 */
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#define CALL_QUOT \
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ldr r12,[r0, #9] /* load quotation-xt slot */ ; \
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mov lr,pc ; \
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mov pc,r12
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#define JUMP_QUOT \
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ldr r12,[r0, #9] /* load quotation-xt slot */ ; \
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mov pc,r12
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#define SAVED_REGS_SIZE 32
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#define FRAME (RESERVED_SIZE + SAVED_REGS_SIZE + 8)
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#define LR_SAVE [sp, #-4]
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#define RESERVED_SIZE 8
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#define SAVE_LR str lr,LR_SAVE
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#define LOAD_LR ldr lr,LR_SAVE
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#define SAVE_AT(offset) (RESERVED_SIZE + 4 * offset)
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#define SAVE(register,offset) str register,[sp, #SAVE_AT(offset)]
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#define RESTORE(register,offset) ldr register,[sp, #SAVE_AT(offset)]
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#define PROLOGUE \
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SAVE_LR ; \
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sub sp,sp,#FRAME
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#define EPILOGUE \
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add sp,sp,#FRAME ; \
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LOAD_LR
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DEF(void,c_to_factor,(CELL quot)):
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PROLOGUE
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SAVE(r4,0) /* save GPRs */
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/* don't save ds pointer */
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/* don't save rs pointer */
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SAVE(r7,3)
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SAVE(r8,4)
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SAVE(r9,5)
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SAVE(r10,6)
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SAVE(r11,7)
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SAVE(r0,8) /* save quotation since we're about to mangle it */
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sub r0,sp,#4 /* pass call stack pointer as an argument */
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bl MANGLE(save_callstack_bottom)
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RESTORE(r0,8) /* restore quotation */
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CALL_QUOT
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RESTORE(r11,7) /* restore GPRs */
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RESTORE(r10,6)
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RESTORE(r9,5)
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RESTORE(r8,4)
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RESTORE(r7,3)
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/* don't restore rs pointer */
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/* don't restore ds pointer */
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RESTORE(r4,0)
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EPILOGUE
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mov pc,lr
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/* The JIT compiles an 'mov r1',sp in front of every primitive call, since a
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word which was defined as a primitive will not change its definition for the
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lifetime of the image -- adding new primitives requires a bootstrap. However,
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an undefined word can certainly become defined,
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DEFER: foo
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...
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: foo ... ;
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And calls to non-primitives do not have this one-instruction prologue, so we
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set the XT of undefined words to this symbol. */
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DEF(void,undefined,(CELL word)):
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sub r1,sp,#4
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b MANGLE(undefined_error)
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DEF(void,dosym,(CELL word)):
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str r0,[r5, #4]! /* push word to stack */
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mov pc,lr /* return */
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/* Here we have two entry points. The first one is taken when profiling is
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enabled */
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DEF(void,docol_profiling,(CELL word)):
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ldr r1,[r0, #25] /* load profile-count slot */
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add r1,r1,#8 /* increment count */
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str r1,[r0, #25] /* store profile-count slot */
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DEF(void,docol,(CELL word)):
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ldr r0,[r0, #13] /* load word-def slot */
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JUMP_QUOT
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/* We must pass the XT to the quotation in r12. */
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DEF(void,primitive_call,(void)):
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ldr r0,[r5], #-4 /* load quotation from data stack */
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JUMP_QUOT
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/* We must preserve r1 here in case we're calling a primitive */
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DEF(void,primitive_execute,(void)):
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ldr r0,[r5], #-4 /* load word from data stack */
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ldr pc,[r0, #29] /* jump to word-xt */
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DEF(void,set_callstack,(F_STACK_FRAME *to, F_STACK_FRAME *from, CELL length)):
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sub sp,r0,r2 /* compute new stack pointer */
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mov r0,sp /* start of destination of memcpy() */
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sub sp,sp,#12 /* alignment */
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bl MANGLE(memcpy) /* go */
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add sp,sp,#16 /* point SP at innermost frame */
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ldr pc,LR_SAVE /* return */
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DEF(void,throw_impl,(CELL quot, F_STACK_FRAME *rewind_to)):
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add sp,r1,#4 /* compute new stack pointer */
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ldr lr,LR_SAVE /* we have rewound the stack; load return address */
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JUMP_QUOT /* call the quotation */
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DEF(void,lazy_jit_compile,(CELL quot)):
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mov r1,sp /* save stack pointer */
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PROLOGUE
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bl MANGLE(primitive_jit_compile)
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EPILOGUE
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JUMP_QUOT /* call the quotation */
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#ifdef WINCE
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.section .drectve
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.ascii " -export:c_to_factor"
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#endif
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