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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
126 lines
2.7 KiB
C
126 lines
2.7 KiB
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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/* b = a*a */
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void fp_sqr(fp_int *A, fp_int *B)
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{
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int y, old_used;
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old_used = B->used;
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/* call generic if we're out of range */
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if (A->used + A->used > FP_SIZE) {
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fp_sqr_comba(A, B);
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goto clean;
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}
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y = A->used;
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#if defined(TFM_SQR3) && FP_SIZE >= 6
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if (y <= 3) {
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fp_sqr_comba3(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR4) && FP_SIZE >= 8
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if (y == 4) {
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fp_sqr_comba4(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR6) && FP_SIZE >= 12
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if (y <= 6) {
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fp_sqr_comba6(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR7) && FP_SIZE >= 14
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if (y == 7) {
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fp_sqr_comba7(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR8) && FP_SIZE >= 16
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if (y == 8) {
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fp_sqr_comba8(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR9) && FP_SIZE >= 18
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if (y == 9) {
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fp_sqr_comba9(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR12) && FP_SIZE >= 24
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if (y <= 12) {
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fp_sqr_comba12(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR17) && FP_SIZE >= 34
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if (y <= 17) {
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fp_sqr_comba17(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SMALL_SET)
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if (y <= 16) {
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fp_sqr_comba_small(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR20) && FP_SIZE >= 40
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if (y <= 20) {
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fp_sqr_comba20(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR24) && FP_SIZE >= 48
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if (y <= 24) {
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fp_sqr_comba24(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR28) && FP_SIZE >= 56
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if (y <= 28) {
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fp_sqr_comba28(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR32) && FP_SIZE >= 64
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if (y <= 32) {
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fp_sqr_comba32(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR48) && FP_SIZE >= 96
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if (y <= 48) {
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fp_sqr_comba48(A,B);
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goto clean;
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}
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#endif
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#if defined(TFM_SQR64) && FP_SIZE >= 128
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if (y <= 64) {
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fp_sqr_comba64(A,B);
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goto clean;
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}
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#endif
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fp_sqr_comba(A, B);
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clean:
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for (y = B->used; y < old_used; y++) {
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B->dp[y] = 0;
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}
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}
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/* $Source: /cvs/libtom/tomsfastmath/src/sqr/fp_sqr.c,v $ */
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/* $Revision: 1.1 $ */
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/* $Date: 2006/12/31 21:25:53 $ */
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