mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 05:51:04 +00:00
103 lines
1.9 KiB
ArmAsm
103 lines
1.9 KiB
ArmAsm
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.global _setjmp
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.global _longjmp
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#ifdef __Z8001__
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segm
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#ifdef __STD_CALL__
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_setjmp:
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ldl rr6,rr14(#4) ! get argument
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ldl rr2,@rr14 ! fetch pc
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ldl @rr6,rr2 ! save it
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ldl rr6(#16),rr8
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ldl rr6(#4),rr10
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ldl rr6(#8),rr12 ! remember frame pointer
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ldl rr6(#12),rr14 ! remember stack pointer
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ldk r7,#0
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ret t
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_longjmp:
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ldl rr4,rr14(#4) ! get first argument
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ld r7,rr14(#8) ! get return value
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ldl rr8,rr4(#16)
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ldl rr10,rr4(#4)
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ldl rr12,rr4(#8) ! restore old frame pointer
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ldl rr14,rr4(#12) ! restore old stack pointer
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ldl rr4,@rr4 ! return address
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inc r15,#4
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jp @rr4
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#else /* above __STD_CALL_, below not */
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_setjmp:
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ldl rr2,@rr14 ! fetch pc
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ldl @rr6,rr2 ! save it
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ldl rr6(16),rr8
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ldl rr6(4),rr10
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ldl rr6(8),rr12 ! and the other special regs
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ldl rr6(12),rr14
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ldk r2,#0
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ret t
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_longjmp:
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ld r2,r5 ! get return value
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ldl rr4,rr6(0)
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ldl rr8,rr6(16)
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ldl rr10,rr6(4)
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ldl rr12,rr6(8)
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ldl rr14,rr6(12)
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inc r15,#4
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jp @rr4
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#endif /* not __STD_CALL__ */
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#else /* above Z8001, below Z8002 */
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unseg
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#ifdef __STD_CALL__
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_setjmp:
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ld r7,r15(#2) ! get argument
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ld r2,@r15 ! fetch pc
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ld @r7,r2 ! save it
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ldl r7(#14),rr8
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ldl r7(#2),rr10
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ldl r7(#6),rr12 ! remember frame pointer
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ldl r7(#10),rr14 ! remember stack pointer
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ldk r7,#0
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ret t
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_longjmp:
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ld r4,r15(#2) ! get first argument (jmp_buf)
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ld r7,r15(#4) ! get return value
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ldl rr8,r4(#14)
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ldl rr10,r4(#2)
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ldl rr12,r4(#6) ! restore old frame pointer
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ldl rr14,r4(#10) ! restore old stack pointer
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ld r4,@r4 ! return address
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inc r15,#2
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jp @r4
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#else /* above __STD_CALL_, below not */
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_setjmp:
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ld r2,@r15 ! fetch pc
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ld @r7,r2 ! save it
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ldl r7(4),rr10
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ldl r7(8),rr12 ! and the other special regs
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ldl r7(12),rr14
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ldk r2,#0
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ret t
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_longjmp:
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ld r2,r6 ! get return value
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ld r4,@r7
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ldl rr10,r7(4)
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ldl rr12,r7(8)
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ldl rr14,r7(12)
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inc r15,#2
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jp @r4
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#endif /* not __STD_CALL__ */
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#endif /* Z8002 version */
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