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(scm_difference): Correction to bignum - negative inum.

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This commit is contained in:
Kevin Ryde 2003-08-22 01:17:48 +00:00
parent fde791b502
commit 708f22c6af
1 changed files with 4 additions and 1 deletions
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5
libguile/numbers.c
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@ -3370,7 +3370,10 @@ scm_difference (SCM x, SCM y)
{ {
SCM result = scm_i_mkbig (); SCM result = scm_i_mkbig ();
mpz_sub_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), yy); if (yy >= 0)
mpz_sub_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), yy);
else
mpz_add_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), -yy);
scm_remember_upto_here_1 (x); scm_remember_upto_here_1 (x);
if ((sgn_x < 0 && (yy > 0)) || ((sgn_x > 0) && yy < 0)) if ((sgn_x < 0 && (yy > 0)) || ((sgn_x > 0) && yy < 0))