block-sha1: guard gcc extensions with __GNUC__
With this, the code should now be portable to any C compiler. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -9,7 +9,7 @@
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#include "sha1.h"
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#if defined(__i386__) || defined(__x86_64__)
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
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/*
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* Force usage of rol or ror by selecting the one with the smaller constant.
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@ -54,7 +54,7 @@
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#if defined(__i386__) || defined(__x86_64__)
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#define setW(x, val) (*(volatile unsigned int *)&W(x) = (val))
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#elif defined(__arm__)
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#elif defined(__GNUC__) && defined(__arm__)
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#define setW(x, val) do { W(x) = (val); __asm__("":::"memory"); } while (0)
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#else
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#define setW(x, val) (W(x) = (val))
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