diff options
Diffstat (limited to 'sysdeps/generic/mul_n.c')
| -rw-r--r-- | sysdeps/generic/mul_n.c | 110 |
1 files changed, 53 insertions, 57 deletions
diff --git a/sysdeps/generic/mul_n.c b/sysdeps/generic/mul_n.c index e37c5d8290..049f63dce8 100644 --- a/sysdeps/generic/mul_n.c +++ b/sysdeps/generic/mul_n.c @@ -1,6 +1,6 @@ -/* __mpn_mul_n -- Multiply two natural numbers of length n. +/* mpn_mul_n -- Multiply two natural numbers of length n. -Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc. +Copyright (C) 1991, 1992, 1993, 1994, 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. @@ -41,13 +41,6 @@ the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define KARATSUBA_THRESHOLD 2 #endif -void -#if __STDC__ -____mpn_mul_n (mp_ptr, mp_srcptr, mp_srcptr, mp_size_t, mp_ptr); -#else -____mpn_mul_n (); -#endif - /* Handle simple cases with traditional multiplication. This is the most critical code of multiplication. All multiplies rely @@ -57,9 +50,9 @@ ____mpn_mul_n (); void #if __STDC__ -____mpn_mul_n_basecase (mp_ptr prodp, mp_srcptr up, mp_srcptr vp, mp_size_t size) +impn_mul_n_basecase (mp_ptr prodp, mp_srcptr up, mp_srcptr vp, mp_size_t size) #else -____mpn_mul_n_basecase (prodp, up, vp, size) +impn_mul_n_basecase (prodp, up, vp, size) mp_ptr prodp; mp_srcptr up; mp_srcptr vp; @@ -82,7 +75,7 @@ ____mpn_mul_n_basecase (prodp, up, vp, size) cy_limb = 0; } else - cy_limb = __mpn_mul_1 (prodp, up, size, v_limb); + cy_limb = mpn_mul_1 (prodp, up, size, v_limb); prodp[size] = cy_limb; prodp++; @@ -96,10 +89,10 @@ ____mpn_mul_n_basecase (prodp, up, vp, size) { cy_limb = 0; if (v_limb == 1) - cy_limb = __mpn_add_n (prodp, prodp, up, size); + cy_limb = mpn_add_n (prodp, prodp, up, size); } else - cy_limb = __mpn_addmul_1 (prodp, up, size, v_limb); + cy_limb = mpn_addmul_1 (prodp, up, size, v_limb); prodp[size] = cy_limb; prodp++; @@ -108,10 +101,10 @@ ____mpn_mul_n_basecase (prodp, up, vp, size) void #if __STDC__ -____mpn_mul_n (mp_ptr prodp, +impn_mul_n (mp_ptr prodp, mp_srcptr up, mp_srcptr vp, mp_size_t size, mp_ptr tspace) #else -____mpn_mul_n (prodp, up, vp, size, tspace) +impn_mul_n (prodp, up, vp, size, tspace) mp_ptr prodp; mp_srcptr up; mp_srcptr vp; @@ -135,9 +128,9 @@ ____mpn_mul_n (prodp, up, vp, size, tspace) mp_limb cy_limb; MPN_MUL_N_RECURSE (prodp, up, vp, esize, tspace); - cy_limb = __mpn_addmul_1 (prodp + esize, up, esize, vp[esize]); + cy_limb = mpn_addmul_1 (prodp + esize, up, esize, vp[esize]); prodp[esize + esize] = cy_limb; - cy_limb = __mpn_addmul_1 (prodp + esize, vp, size, up[esize]); + cy_limb = mpn_addmul_1 (prodp + esize, vp, size, up[esize]); prodp[esize + size] = cy_limb; } @@ -170,24 +163,24 @@ ____mpn_mul_n (prodp, up, vp, size, tspace) /*** Product M. ________________ |_(U1-U0)(V0-V1)_| */ - if (__mpn_cmp (up + hsize, up, hsize) >= 0) + if (mpn_cmp (up + hsize, up, hsize) >= 0) { - __mpn_sub_n (prodp, up + hsize, up, hsize); + mpn_sub_n (prodp, up + hsize, up, hsize); negflg = 0; } else { - __mpn_sub_n (prodp, up, up + hsize, hsize); + mpn_sub_n (prodp, up, up + hsize, hsize); negflg = 1; } - if (__mpn_cmp (vp + hsize, vp, hsize) >= 0) + if (mpn_cmp (vp + hsize, vp, hsize) >= 0) { - __mpn_sub_n (prodp + hsize, vp + hsize, vp, hsize); + mpn_sub_n (prodp + hsize, vp + hsize, vp, hsize); negflg ^= 1; } else { - __mpn_sub_n (prodp + hsize, vp, vp + hsize, hsize); + mpn_sub_n (prodp + hsize, vp, vp + hsize, hsize); /* No change of NEGFLG. */ } /* Read temporary operands from low part of PROD. @@ -197,13 +190,13 @@ ____mpn_mul_n (prodp, up, vp, size, tspace) /*** Add/copy product H. */ MPN_COPY (prodp + hsize, prodp + size, hsize); - cy = __mpn_add_n (prodp + size, prodp + size, prodp + size + hsize, hsize); + cy = mpn_add_n (prodp + size, prodp + size, prodp + size + hsize, hsize); /*** Add product M (if NEGFLG M is a negative number). */ if (negflg) - cy -= __mpn_sub_n (prodp + hsize, prodp + hsize, tspace, size); + cy -= mpn_sub_n (prodp + hsize, prodp + hsize, tspace, size); else - cy += __mpn_add_n (prodp + hsize, prodp + hsize, tspace, size); + cy += mpn_add_n (prodp + hsize, prodp + hsize, tspace, size); /*** Product L. ________________ ________________ |________________||____U0 x V0_____| */ @@ -214,22 +207,22 @@ ____mpn_mul_n (prodp, up, vp, size, tspace) /*** Add/copy Product L (twice). */ - cy += __mpn_add_n (prodp + hsize, prodp + hsize, tspace, size); + cy += mpn_add_n (prodp + hsize, prodp + hsize, tspace, size); if (cy) - __mpn_add_1 (prodp + hsize + size, prodp + hsize + size, hsize, cy); + mpn_add_1 (prodp + hsize + size, prodp + hsize + size, hsize, cy); MPN_COPY (prodp, tspace, hsize); - cy = __mpn_add_n (prodp + hsize, prodp + hsize, tspace + hsize, hsize); + cy = mpn_add_n (prodp + hsize, prodp + hsize, tspace + hsize, hsize); if (cy) - __mpn_add_1 (prodp + size, prodp + size, size, 1); + mpn_add_1 (prodp + size, prodp + size, size, 1); } } void #if __STDC__ -____mpn_sqr_n_basecase (mp_ptr prodp, mp_srcptr up, mp_size_t size) +impn_sqr_n_basecase (mp_ptr prodp, mp_srcptr up, mp_size_t size) #else -____mpn_sqr_n_basecase (prodp, up, size) +impn_sqr_n_basecase (prodp, up, size) mp_ptr prodp; mp_srcptr up; mp_size_t size; @@ -251,7 +244,7 @@ ____mpn_sqr_n_basecase (prodp, up, size) cy_limb = 0; } else - cy_limb = __mpn_mul_1 (prodp, up, size, v_limb); + cy_limb = mpn_mul_1 (prodp, up, size, v_limb); prodp[size] = cy_limb; prodp++; @@ -265,10 +258,10 @@ ____mpn_sqr_n_basecase (prodp, up, size) { cy_limb = 0; if (v_limb == 1) - cy_limb = __mpn_add_n (prodp, prodp, up, size); + cy_limb = mpn_add_n (prodp, prodp, up, size); } else - cy_limb = __mpn_addmul_1 (prodp, up, size, v_limb); + cy_limb = mpn_addmul_1 (prodp, up, size, v_limb); prodp[size] = cy_limb; prodp++; @@ -277,10 +270,10 @@ ____mpn_sqr_n_basecase (prodp, up, size) void #if __STDC__ -____mpn_sqr_n (mp_ptr prodp, +impn_sqr_n (mp_ptr prodp, mp_srcptr up, mp_size_t size, mp_ptr tspace) #else -____mpn_sqr_n (prodp, up, size, tspace) +impn_sqr_n (prodp, up, size, tspace) mp_ptr prodp; mp_srcptr up; mp_size_t size; @@ -303,9 +296,9 @@ ____mpn_sqr_n (prodp, up, size, tspace) mp_limb cy_limb; MPN_SQR_N_RECURSE (prodp, up, esize, tspace); - cy_limb = __mpn_addmul_1 (prodp + esize, up, esize, up[esize]); + cy_limb = mpn_addmul_1 (prodp + esize, up, esize, up[esize]); prodp[esize + esize] = cy_limb; - cy_limb = __mpn_addmul_1 (prodp + esize, up, size, up[esize]); + cy_limb = mpn_addmul_1 (prodp + esize, up, size, up[esize]); prodp[esize + size] = cy_limb; } @@ -322,13 +315,13 @@ ____mpn_sqr_n (prodp, up, size, tspace) /*** Product M. ________________ |_(U1-U0)(U0-U1)_| */ - if (__mpn_cmp (up + hsize, up, hsize) >= 0) + if (mpn_cmp (up + hsize, up, hsize) >= 0) { - __mpn_sub_n (prodp, up + hsize, up, hsize); + mpn_sub_n (prodp, up + hsize, up, hsize); } else { - __mpn_sub_n (prodp, up, up + hsize, hsize); + mpn_sub_n (prodp, up, up + hsize, hsize); } /* Read temporary operands from low part of PROD. @@ -338,10 +331,10 @@ ____mpn_sqr_n (prodp, up, size, tspace) /*** Add/copy product H. */ MPN_COPY (prodp + hsize, prodp + size, hsize); - cy = __mpn_add_n (prodp + size, prodp + size, prodp + size + hsize, hsize); + cy = mpn_add_n (prodp + size, prodp + size, prodp + size + hsize, hsize); /*** Add product M (if NEGFLG M is a negative number). */ - cy -= __mpn_sub_n (prodp + hsize, prodp + hsize, tspace, size); + cy -= mpn_sub_n (prodp + hsize, prodp + hsize, tspace, size); /*** Product L. ________________ ________________ |________________||____U0 x U0_____| */ @@ -352,53 +345,56 @@ ____mpn_sqr_n (prodp, up, size, tspace) /*** Add/copy Product L (twice). */ - cy += __mpn_add_n (prodp + hsize, prodp + hsize, tspace, size); + cy += mpn_add_n (prodp + hsize, prodp + hsize, tspace, size); if (cy) - __mpn_add_1 (prodp + hsize + size, prodp + hsize + size, hsize, cy); + mpn_add_1 (prodp + hsize + size, prodp + hsize + size, hsize, cy); MPN_COPY (prodp, tspace, hsize); - cy = __mpn_add_n (prodp + hsize, prodp + hsize, tspace + hsize, hsize); + cy = mpn_add_n (prodp + hsize, prodp + hsize, tspace + hsize, hsize); if (cy) - __mpn_add_1 (prodp + size, prodp + size, size, 1); + mpn_add_1 (prodp + size, prodp + size, size, 1); } } /* This should be made into an inline function in gmp.h. */ inline void #if __STDC__ -__mpn_mul_n (mp_ptr prodp, mp_srcptr up, mp_srcptr vp, mp_size_t size) +mpn_mul_n (mp_ptr prodp, mp_srcptr up, mp_srcptr vp, mp_size_t size) #else -__mpn_mul_n (prodp, up, vp, size) +mpn_mul_n (prodp, up, vp, size) mp_ptr prodp; mp_srcptr up; mp_srcptr vp; mp_size_t size; #endif { + TMP_DECL (marker); + TMP_MARK (marker); if (up == vp) { if (size < KARATSUBA_THRESHOLD) { - ____mpn_sqr_n_basecase (prodp, up, size); + impn_sqr_n_basecase (prodp, up, size); } else { mp_ptr tspace; - tspace = (mp_ptr) alloca (2 * size * BYTES_PER_MP_LIMB); - ____mpn_sqr_n (prodp, up, size, tspace); + tspace = (mp_ptr) TMP_ALLOC (2 * size * BYTES_PER_MP_LIMB); + impn_sqr_n (prodp, up, size, tspace); } } else { if (size < KARATSUBA_THRESHOLD) { - ____mpn_mul_n_basecase (prodp, up, vp, size); + impn_mul_n_basecase (prodp, up, vp, size); } else { mp_ptr tspace; - tspace = (mp_ptr) alloca (2 * size * BYTES_PER_MP_LIMB); - ____mpn_mul_n (prodp, up, vp, size, tspace); + tspace = (mp_ptr) TMP_ALLOC (2 * size * BYTES_PER_MP_LIMB); + impn_mul_n (prodp, up, vp, size, tspace); } } + TMP_FREE (marker); } |