e867861f6d
Add rules for 8-byte integers to m68020 ncg. Add 8-byte long long to ACK C on linux68k. Enable long-long tests for linux68k. The tests pass in our emulator using musahi; I don't have a real 68k processor and haven't tried other emulators. Still missing are conversions between 8-byte integers and any size of floats. The long-long tests don't cover these conversions, and our emulator can't do floating-point. Our build always enables TBL68020 and uses word size 4. Without TBL68020, 8-byte multiply and divide are missing. With word size 2, some conversions between 2-byte and 8-byte integers are missing. Fix .cii in libem, which didn't work when converting from 1-byte or 2-byte integers. Now .cii and .cuu work, but also add some rules to skip .cii and .cuu when converting 8-byte integers. The new rule for loc 4 loc 8 cii `with test_set4` exposes a bug: the table may believe that the condition codes test a 4-byte register when they only test a word or byte, and this incorrect test may describe an unsigned word or byte as negative. Another rule `with exact test_set1+test_set2` works around the bug by ignoring the negative flag, because a zero-extended word or byte is never negative. The old rules for comparison and logic do work with 8-byte integers and bitsets, but add some specific 8-byte rules to skip libem calls or loops. There were no rules for 8-byte arithmetic, shift, or rotate; so add some. There is a register shortage, because the table requires preserving d3 to d7, leaving only 3 data registers (d0, d1, d2) for 8-byte operations. Because of the shortage, the code may move data to an address register, or read a memory location more than once. The multiplication and division code are translations of the i386 code. They pass the tests, but might not give the best performance on a real 68k processor.
87 lines
1.9 KiB
Text
87 lines
1.9 KiB
Text
# $Source: /cvsroot/tack/Ack/plat/linux386/descr,v $
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# $State: Exp $
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# $Revision: 1.1 $
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var w=4
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var wa=4
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var p={w}
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var pa={w}
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var s=2
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var sa={s}
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var l={w}
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var la={w}
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var q=8
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var qa=4
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var f={w}
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var fa={w}
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var d=8
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var da={d}
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var x=8
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var xa={x}
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var ARCH=m68020
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var PLATFORM=linux68k
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var PLATFORMDIR={EM}/share/ack/{PLATFORM}
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var CPP_F=-D__unix -D__mc68020 -D__m68k -D__mc68000 -D__M68020 -D_EM_LLSIZE={q}
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var ALIGN=-a0:4 -a1:4 -a2:4 -a3:4 -b0:0x08000054
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var C_LIB={PLATFORMDIR}/libc-ansi.a
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# bitfields reversed for compatibility with (g)cc.
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# long long enabled.
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var CC_ALIGN=-Vrq{q}.{qa}
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var OLD_C_LIB={C_LIB}
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var MACHOPT_F=-ml10
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var EGO_PLAT_FLAGS=-M{EM}/share/ack/ego/{ARCH}.descr
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# Override the setting in fe so that files compiled for linux68k can see
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# the platform-specific headers.
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var C_INCLUDES=-I{EM}/share/ack/linux/include -I{EM}/share/ack/include/ansi
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name be
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from .m.g
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to .s
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program {EM}/lib/ack/{PLATFORM}/ncg
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mapflag -gdb GF=-gdb
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args {GF?} <
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stdout
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need .e
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end
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name as
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from .s.so
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to .o
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program {EM}/lib/ack/{PLATFORM}/as
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args - -o > <
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prep cond
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end
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name led
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from .o.a
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to .out
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program {EM}/lib/ack/em_led
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mapflag -l* LNAME={PLATFORMDIR}/lib*
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mapflag -fp FLOATS={EM}/{LIB}fp
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args {ALIGN} {SEPID?} \
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({RTS}:.b=-u _i_main) \
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(.e:{HEAD}={PLATFORMDIR}/boot.o) \
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({RTS}:.ocm.bas.b={PLATFORMDIR}/c-ansi.o) \
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({RTS}:.c={PLATFORMDIR}/c-ansi.o) \
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({RTS}:.mod={PLATFORMDIR}/modula2.o) \
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({RTS}:.p={PLATFORMDIR}/pascal.o) \
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-o > < \
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(.p:{TAIL}={PLATFORMDIR}/libpascal.a) \
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(.b:{TAIL}={PLATFORMDIR}/libb.a) \
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(.bas:{TAIL}={PLATFORMDIR}/libbasic.a) \
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(.mod:{TAIL}={PLATFORMDIR}/libmodula2.a) \
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(.ocm:{TAIL}={PLATFORMDIR}/liboccam.a) \
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(.ocm.bas.mod.b.c.p:{TAIL}={PLATFORMDIR}/libc.a) \
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{FLOATS?} \
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(.e:{TAIL}={PLATFORMDIR}/libem.a \
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{PLATFORMDIR}/libsys.a \
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{PLATFORMDIR}/libend.a)
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linker
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end
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name cv
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from .out
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to .exe
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program {EM}/bin/aelflod
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args -m4 -b < >
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outfile linux68k.exe
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end
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