0c2b6f523c
David Given made top for PowerPC. Copy the asopt phase (running top)
from linuxppc to osxppc.
Remove CC_ALIGN=-Vr to become compatible with Apple's gcc. Apple uses
left adjustment for bitfields; the first bitfield is on the left side
(the big end), not the right side.
Remove unused variables C_LIB and OLD_C_LIB; the file libc-ansi.a
doesn't exist.
Change MACHOPT_F from -m10 to -m3. This means to use no more than 3
adds and shifts to optimize a multiply by a constant. I pick -m3
because -m4 can use too many instructions. At -m4, the compiler
rewrites
n * 14
as
s = n << 1
(s << 3) + (0 - s)
This means (n * 16 - n * 2), but even at ack -O6, the compiler doesn't
rewrite (a + (0 - b)) as (a - b). The compiler emits 5 instructions:
2 of rlinmw for 2 left shifts, then addi to load 0 in a register, subf
to subtract from that 0, then add. These 5 instructions cost 5 cycles
on the MPC7450, using the cycle counts from mach/powerpc/ncg/table.
At -m3, (n * 14) becomes 2 instructions: addi to load 14 in a register
and mullw to multiply. This also costs 5 cycles (because mullw costs
4 cycles), but uses less space.
86 lines
1.6 KiB
Plaintext
86 lines
1.6 KiB
Plaintext
# plat/osxppc/descr
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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 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=powerpc
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var PLATFORM=osxppc
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var PLATFORMDIR={EM}/share/ack/{PLATFORM}
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var CPP_F=-D__unix
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var ALIGN=-a0:4 -a1:4 -a2:4096 -a3:4 -b0:0x129c
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var MACHOPT_F=-m3
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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 osxppc can see
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# the platform-specific headers.
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var C_INCLUDES=-I{EM}/share/ack/osx/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/linuxppc/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 asopt
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from .s
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to .so
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program {EM}/lib/ack/linuxppc/top
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args
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optimizer
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stdin
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stdout
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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/linuxppc/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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(.e:{HEAD}={PLATFORMDIR}/boot.o) \
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({RTS}:.ocm.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}/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.b.mod.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}/lib/ack/cvmach
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args -m18 < >
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outfile osxppc.exe
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end
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