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converting asmsh to gnu as

vbt - Nov 3, 2018

vbt

Nov 3, 2018

i'm having some issues,
what would be the correct synthax

	
	
		
		
			in original code :

        move    =$00f0,r0

in my code :

val1:            .long 0x000000f0

        mov.l        val1,r0

in disassembled code :

!   10002:    d0 05           mov.l    0x10018,r0    ! f0



assembler error :

maths.s:42: Error: negative offset

maths.s:42: Error: pcrel too far

just wondering if this is correct :

	
	
		
		
			in original code :

    cnop    0,4

jumptab

    dc.l    __ashiftrt_r0_0

    dc.l    __ashiftrt_r0_1

    dc.l    __ashiftrt_r0_2

    dc.l    __ashiftrt_r0_3

    dc.l    __ashiftrt_r0_4

in my code :

.align    4

jumptab:

    .long    __ashiftrt_r0_0

    .long    __ashiftrt_r0_1

    .long    __ashiftrt_r0_2

    .long    __ashiftrt_r0_3

    .long    __ashiftrt_r0_4

it references fonctions so is it correct to define longs for that ?

		antime		Nov 3, 2018
			The move immediate instructions only support a positive offset, so the constant must be placed after the code that uses it. I don't know what the "cnop" directive is supposed to do, but otherwise it looks correct.

vbt

Nov 3, 2018

		antime said:

thanks @antime... it's assembled, it gives a new issue

saturn/maths.o: In function `jumptab':
(.text+0x100): undefined reference to `_ashiftrt_r0_0'
saturn/maths.o: In function `jumptab':
(.text+0x104): undefined reference to `_ashiftrt_r0_1'
saturn/maths.o: In function `jumptab':
(.text+0x108): undefined reference to `_ashiftrt_r0_2'
saturn/maths.o: In function `jumptab':
(.text+0x10c): undefined reference to `_ashiftrt_r0_3'
saturn/maths.o: In function `jumptab':
(.text+0x110): undefined reference to `_ashiftrt_r0_4'
saturn/maths.o: In function `jumptab':
(.text+0x114): undefined reference to `_ashiftrt_r0_5'
saturn/maths.o: In function `jumptab':
(.text+0x118): undefined reference to `_ashiftrt_r0_6'
saturn/maths.o: In function `jumptab':
(.text+0x11c): undefined reference to `_ashiftrt_r0_7'
collect2.exe: error: ld returned 1 exit status

i don't find these functions in gcc, maybe it was just in the old cygnus ?
the target of that asm lib was to improve speed of the original functions provided by the compiler for sh2.

		antime		Nov 3, 2018
			There's a corresponding set of ___ashiftrt_r4_n functions in libgcc.a (both modern, and cygnus-2.7-96Q3). Renesas' toolchain uses a different ABI, so if your original assembly isn't for GCC you'll probably need to adapt it in places.

		vbt		Nov 4, 2018
			well, thanks Antime, everything is assembled, i can't swear the replaced functions are really faster than modern gcc. I recompiled fba with these updates. here are the modified functions : Address Names alphabetically 00000482 __ASHIFTRT_R4_0 0000047E __ASHIFTRT_R4_1 00000404 __ASHIFTRT_R4_10 000003F8 __ASHIFTRT_R4_11 000003EA __ASHIFTRT_R4_12 000003DC __ASHIFTRT_R4_13 000003CC __ASHIFTRT_R4_14 000003BC __ASHIFTRT_R4_15 000003B6 __ASHIFTRT_R4_16 000003AE __ASHIFTRT_R4_17 000003A4 __ASHIFTRT_R4_18 00000398 __ASHIFTRT_R4_19 0000047C __ASHIFTRT_R4_2 0000038C __ASHIFTRT_R4_20 0000037E __ASHIFTRT_R4_21 00000370 __ASHIFTRT_R4_22 00000360 __ASHIFTRT_R4_23 00000358 __ASHIFTRT_R4_24 0000034E __ASHIFTRT_R4_25 00000342 __ASHIFTRT_R4_26 00000334 __ASHIFTRT_R4_27 00000326 __ASHIFTRT_R4_28 00000316 __ASHIFTRT_R4_29 0000047A __ASHIFTRT_R4_3 00000306 __ASHIFTRT_R4_30 00000300 __ASHIFTRT_R4_31 00000300 __ASHIFTRT_R4_32 00000478 __ASHIFTRT_R4_4 00000476 __ASHIFTRT_R4_5 00000474 __ASHIFTRT_R4_6 00000472 __ASHIFTRT_R4_7 0000041A __ASHIFTRT_R4_8 00000410 __ASHIFTRT_R4_9 00000150 __ASHRSI3 00000000 __MULSI3 00000006 __SDIVSI3 00000028 __UDIVSI3 i will publish the version for gas, maybe there are still bugs (well, there are ), the asmsh version was bug free.