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375ecf678c
Update the vendored TomsFastMath (TFM) library to v0.13.1. Resolves: https://bugzilla.clamav.net/show_bug.cgi?id=11992 I removed compatibility macro's from when libTomMath was used. This required removing a bunch of faux-error handling because the fast-math equivalent functions return void, and cannot fail. The previous version used had named the header "bignum_fast.h" instead of "tfm.h" and had customizations in that header to enable TFM_CHECK all the time, and also TFM_NO_ASM if __GNUC__ not defined or if the system isn't 64bit architecture. This update uses tfm.h as-is, and has CMake define TFM_CHECK and TFM_NO_ASM as needed. I've kept bignum.h as an interface to including tfm.h so that in the future we can more easily add support for system-installed TomsFastMath instead of the vendored one, taking inspiration from Debian's patch to support system-TomsFastMath. See: https://salsa.debian.org/clamav-team/clamav/-/blob/unstable/debian/patches/add-support-for-system-tomsfastmath.patch
38 lines
700 B
C
38 lines
700 B
C
/* TomsFastMath, a fast ISO C bignum library.
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*
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* This project is meant to fill in where LibTomMath
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* falls short. That is speed ;-)
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*
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* This project is public domain and free for all purposes.
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*
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* Tom St Denis, tomstdenis@gmail.com
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*/
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#include <tfm_private.h>
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void fp_lshd(fp_int *a, int x)
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{
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int y;
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/* move up and truncate as required */
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y = MIN(a->used + x - 1, (int)(FP_SIZE-1));
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/* store new size */
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a->used = y + 1;
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/* move digits */
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for (; y >= x; y--) {
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a->dp[y] = a->dp[y-x];
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}
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/* zero lower digits */
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for (; y >= 0; y--) {
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a->dp[y] = 0;
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}
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/* clamp digits */
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fp_clamp(a);
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}
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/* $Source$ */
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/* $Revision$ */
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/* $Date$ */
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