mirror of
https://github.com/autc04/Retro68.git
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120 lines
2.2 KiB
ArmAsm
120 lines
2.2 KiB
ArmAsm
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#ifdef __SH5__
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.section .data,"aw"
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.global ___data
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___data:
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.section .rodata,"a"
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.global ___rodata
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___rodata:
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#if __SH5__ == 64
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.section .text,"ax"
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#define LOAD_ADDR(sym, reg) \
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movi (sym >> 48) & 65535, reg; \
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shori (sym >> 32) & 65535, reg; \
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shori (sym >> 16) & 65535, reg; \
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shori sym & 65535, reg
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#else
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.mode SHmedia
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.section .text..SHmedia32,"ax"
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#define LOAD_ADDR(sym, reg) \
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movi (sym >> 16) & 65535, reg; \
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shori sym & 65535, reg
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#endif
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.global start
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start:
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LOAD_ADDR (_stack, r15)
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pt/l zero_bss_loop, tr0
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pt/l _atexit, tr1
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pt/l _init, tr5
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pt/l _main, tr6
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pt/l _exit, tr7
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! zero out bss
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LOAD_ADDR (_edata, r0)
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LOAD_ADDR (_end, r1)
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zero_bss_loop:
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stx.q r0, r63, r63
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addi r0, 8, r0
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bgt/l r1, r0, tr0
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LOAD_ADDR (___data, r26)
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LOAD_ADDR (___rodata, r27)
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#if ! __SH4_NOFPU__
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getcon cr0, r0
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movi 1, r1
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shlli r1, 15, r1
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or r1, r0, r0
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putcon r0, cr0
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#endif
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! arrange for exit to call fini
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LOAD_ADDR (_fini, r2)
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blink tr1, r18
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! call init
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blink tr5, r18
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! call the mainline
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blink tr6, r18
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! call exit
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blink tr7, r18
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#else
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.section .text
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.global start
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start:
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mov.l stack_k,r15
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! zero out bss
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mov.l edata_k,r0
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mov.l end_k,r1
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mov #0,r2
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start_l:
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mov.l r2,@r0
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add #4,r0
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cmp/ge r0,r1
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bt start_l
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#ifndef __SH2A_NOFPU__
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#if defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY) || defined(__SH2A__)
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mov.l set_fpscr_k, r1
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jsr @r1
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mov #0,r4
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lds r3,fpscr
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#endif /* defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__) || defined(__SH2A__) */
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#endif /* !__SH2A_NOFPU__ */
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! call the mainline
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mov.l main_k,r0
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jsr @r0
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or r0,r0
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! call exit
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mov r0,r4
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mov.l exit_k,r0
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jsr @r0
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or r0,r0
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.align 2
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#ifndef __SH2A_NOFPU__
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#if defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(__SH4_SINGLE_ONLY__) || defined(__SH2A__)
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set_fpscr_k:
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.long ___set_fpscr
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#endif /* defined (__SH3E__) || defined(__SH4_SINGLE__) || defined(__SH4__) || defined(SH4_SINGLE_ONLY) || defined(__SH2A__) */
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#endif /* !__SH2A_NOFPU__ */
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stack_k:
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.long _stack
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edata_k:
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.long _edata
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end_k:
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.long _end
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main_k:
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.long _main
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exit_k:
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.long _exit
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#endif
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