244a0bcf48
1. Previously, printing the number 1.0 could produce 0x1p+0, 0x2p-1, 0x4p-2, or 0x8p-3, depending on what happened to be convenient. This meant that printing a value as a double and printing the same value as a long double could produce different (but equivalent) results. The change is to always make the leading digit a 1, unless the number is 0. This solves the aforementioned problem and has several other advantages. 2. Use the FPU to do rounding. This is far simpler and more portable than manipulating the bits, and it fixes an obsure round-to-even bug. It also raises the exceptions now required by IEEE 754R. The drawbacks are that it is usually slightly slower, and it makes printf less effective as a debugging tool when the FPU is hosed (e.g., due to a buggy softfloat implementation). 3. On i386, twiddle the rounding precision so that (2) works properly for long doubles. 4. Make several simplifications that are now possible due to (2). 5. Split __hldtoa() into a separate file. Thanks to remko for access to a sparc64 box for testing.
21 lines
477 B
Makefile
21 lines
477 B
Makefile
# $FreeBSD$
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# netlib gdtoa sources
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.PATH: ${.CURDIR}/gdtoa
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MISRCS+=_hdtoa.c _hldtoa.c _ldtoa.c glue.c
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GDTOASRCS+=dmisc.c dtoa.c gdtoa.c gethex.c gmisc.c \
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hd_init.c hexnan.c misc.c smisc.c \
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strtod.c strtodg.c strtof.c strtord.c sum.c ulp.c
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SYM_MAPS+=${.CURDIR}/gdtoa/Symbol.map
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CFLAGS+=-I${.CURDIR}/../../contrib/gdtoa
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.for src in ${GDTOASRCS}
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MISRCS+=gdtoa_${src}
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CLEANFILES+=gdtoa_${src}
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gdtoa_${src}:
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ln -sf ${.CURDIR}/../../contrib/gdtoa/${src} ${.TARGET}
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.endfor
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