patches/glibc/2.6/160-use_short_for_fnstsw.patch
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"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
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Sun Jul 17 22:46:47 2011 +0200 (2011-07-17) |
| changeset 2892 |
aa934ec4b4ee |
| parent 607 |
aaf7ae5cb11a
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| permissions |
-rw-r--r-- |
cc/gcc: add the backend/frontend infra for final gcc
Currently, we issue the bare-metal compiler from the pass_1 & pass_2
core compilers, because the final gcc breaks while doing so.
This implies we have to build some libces during the start_files step,
instead of the standard libc step. This is the case for newlib.
By adding a backend/frontend infra to the final gcc, we can abstract
what backend to call: the standard backend for non-bare-metal gcc,
and the core backend for bare-metal.
This patch is just an no-op, it just adds the final backend and
frontend without changing the way bare-metal is built, to come in a
subsequent patch.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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yann@607
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Original patch from H.J. Lu, as reported there:
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yann@607
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http://www.nabble.com/PATCH:-Use-short-for-fnstsw-td14775171.html
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yann@607
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yann@607
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fnstsw stores 16bit into %ax. The upper 16bit of %eax is unchanged.
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yann@607
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The new assembler (binutils-2.18.50.0.4 and up) will disallow "fnstsw %eax".
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yann@607
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yann@607
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diff -dur glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c
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yann@607
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--- glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c 2004-03-05 11:14:48.000000000 +0100
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yann@607
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+++ glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c 2008-06-24 10:56:14.000000000 +0200
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yann@607
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@@ -26,7 +26,7 @@
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yann@607
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int
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yann@607
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fetestexcept (int excepts)
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yann@607
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{
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yann@607
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- int temp;
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yann@607
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+ short temp;
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yann@607
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int xtemp = 0;
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yann@607
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yann@607
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/* Get current exceptions. */
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