diff options
Diffstat (limited to 'arch/ppc/math-emu/op-2.h')
| -rw-r--r-- | arch/ppc/math-emu/op-2.h | 433 |
1 files changed, 0 insertions, 433 deletions
diff --git a/arch/ppc/math-emu/op-2.h b/arch/ppc/math-emu/op-2.h deleted file mode 100644 index b9b06b4..0000000 --- a/arch/ppc/math-emu/op-2.h +++ /dev/null @@ -1,433 +0,0 @@ -/* - * Basic two-word fraction declaration and manipulation. - */ - -#define _FP_FRAC_DECL_2(X) _FP_W_TYPE X##_f0, X##_f1 -#define _FP_FRAC_COPY_2(D,S) (D##_f0 = S##_f0, D##_f1 = S##_f1) -#define _FP_FRAC_SET_2(X,I) __FP_FRAC_SET_2(X, I) -#define _FP_FRAC_HIGH_2(X) (X##_f1) -#define _FP_FRAC_LOW_2(X) (X##_f0) -#define _FP_FRAC_WORD_2(X,w) (X##_f##w) - -#define _FP_FRAC_SLL_2(X,N) \ - do { \ - if ((N) < _FP_W_TYPE_SIZE) \ - { \ - if (__builtin_constant_p(N) && (N) == 1) \ - { \ - X##_f1 = X##_f1 + X##_f1 + (((_FP_WS_TYPE)(X##_f0)) < 0); \ - X##_f0 += X##_f0; \ - } \ - else \ - { \ - X##_f1 = X##_f1 << (N) | X##_f0 >> (_FP_W_TYPE_SIZE - (N)); \ - X##_f0 <<= (N); \ - } \ - } \ - else \ - { \ - X##_f1 = X##_f0 << ((N) - _FP_W_TYPE_SIZE); \ - X##_f0 = 0; \ - } \ - } while (0) - -#define _FP_FRAC_SRL_2(X,N) \ - do { \ - if ((N) < _FP_W_TYPE_SIZE) \ - { \ - X##_f0 = X##_f0 >> (N) | X##_f1 << (_FP_W_TYPE_SIZE - (N)); \ - X##_f1 >>= (N); \ - } \ - else \ - { \ - X##_f0 = X##_f1 >> ((N) - _FP_W_TYPE_SIZE); \ - X##_f1 = 0; \ - } \ - } while (0) - -/* Right shift with sticky-lsb. */ -#define _FP_FRAC_SRS_2(X,N,sz) \ - do { \ - if ((N) < _FP_W_TYPE_SIZE) \ - { \ - X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) | \ - (__builtin_constant_p(N) && (N) == 1 \ - ? X##_f0 & 1 \ - : (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \ - X##_f1 >>= (N); \ - } \ - else \ - { \ - X##_f0 = (X##_f1 >> ((N) - _FP_W_TYPE_SIZE) | \ - (((X##_f1 << (sz - (N))) | X##_f0) != 0)); \ - X##_f1 = 0; \ - } \ - } while (0) - -#define _FP_FRAC_ADDI_2(X,I) \ - __FP_FRAC_ADDI_2(X##_f1, X##_f0, I) - -#define _FP_FRAC_ADD_2(R,X,Y) \ - __FP_FRAC_ADD_2(R##_f1, R##_f0, X##_f1, X##_f0, Y##_f1, Y##_f0) - -#define _FP_FRAC_SUB_2(R,X,Y) \ - __FP_FRAC_SUB_2(R##_f1, R##_f0, X##_f1, X##_f0, Y##_f1, Y##_f0) - -#define _FP_FRAC_CLZ_2(R,X) \ - do { \ - if (X##_f1) \ - __FP_CLZ(R,X##_f1); \ - else \ - { \ - __FP_CLZ(R,X##_f0); \ - R += _FP_W_TYPE_SIZE; \ - } \ - } while(0) - -/* Predicates */ -#define _FP_FRAC_NEGP_2(X) ((_FP_WS_TYPE)X##_f1 < 0) -#define _FP_FRAC_ZEROP_2(X) ((X##_f1 | X##_f0) == 0) -#define _FP_FRAC_OVERP_2(fs,X) (X##_f1 & _FP_OVERFLOW_##fs) -#define _FP_FRAC_EQ_2(X, Y) (X##_f1 == Y##_f1 && X##_f0 == Y##_f0) -#define _FP_FRAC_GT_2(X, Y) \ - ((X##_f1 > Y##_f1) || (X##_f1 == Y##_f1 && X##_f0 > Y##_f0)) -#define _FP_FRAC_GE_2(X, Y) \ - ((X##_f1 > Y##_f1) || (X##_f1 == Y##_f1 && X##_f0 >= Y##_f0)) - -#define _FP_ZEROFRAC_2 0, 0 -#define _FP_MINFRAC_2 0, 1 - -/* - * Internals - */ - -#define __FP_FRAC_SET_2(X,I1,I0) (X##_f0 = I0, X##_f1 = I1) - -#define __FP_CLZ_2(R, xh, xl) \ - do { \ - if (xh) \ - __FP_CLZ(R,xl); \ - else \ - { \ - __FP_CLZ(R,xl); \ - R += _FP_W_TYPE_SIZE; \ - } \ - } while(0) - -#if 0 - -#ifndef __FP_FRAC_ADDI_2 -#define __FP_FRAC_ADDI_2(xh, xl, i) \ - (xh += ((xl += i) < i)) -#endif -#ifndef __FP_FRAC_ADD_2 -#define __FP_FRAC_ADD_2(rh, rl, xh, xl, yh, yl) \ - (rh = xh + yh + ((rl = xl + yl) < xl)) -#endif -#ifndef __FP_FRAC_SUB_2 -#define __FP_FRAC_SUB_2(rh, rl, xh, xl, yh, yl) \ - (rh = xh - yh - ((rl = xl - yl) > xl)) -#endif - -#else - -#undef __FP_FRAC_ADDI_2 -#define __FP_FRAC_ADDI_2(xh, xl, i) add_ssaaaa(xh, xl, xh, xl, 0, i) -#undef __FP_FRAC_ADD_2 -#define __FP_FRAC_ADD_2 add_ssaaaa -#undef __FP_FRAC_SUB_2 -#define __FP_FRAC_SUB_2 sub_ddmmss - -#endif - -/* - * Unpack the raw bits of a native fp value. Do not classify or - * normalize the data. - */ - -#define _FP_UNPACK_RAW_2(fs, X, val) \ - do { \ - union _FP_UNION_##fs _flo; _flo.flt = (val); \ - \ - X##_f0 = _flo.bits.frac0; \ - X##_f1 = _flo.bits.frac1; \ - X##_e = _flo.bits.exp; \ - X##_s = _flo.bits.sign; \ - } while (0) - - -/* - * Repack the raw bits of a native fp value. - */ - -#define _FP_PACK_RAW_2(fs, val, X) \ - do { \ - union _FP_UNION_##fs _flo; \ - \ - _flo.bits.frac0 = X##_f0; \ - _flo.bits.frac1 = X##_f1; \ - _flo.bits.exp = X##_e; \ - _flo.bits.sign = X##_s; \ - \ - (val) = _flo.flt; \ - } while (0) - - -/* - * Multiplication algorithms: - */ - -/* Given a 1W * 1W => 2W primitive, do the extended multiplication. */ - -#define _FP_MUL_MEAT_2_wide(fs, R, X, Y, doit) \ - do { \ - _FP_FRAC_DECL_4(_z); _FP_FRAC_DECL_2(_b); _FP_FRAC_DECL_2(_c); \ - \ - doit(_FP_FRAC_WORD_4(_z,1), _FP_FRAC_WORD_4(_z,0), X##_f0, Y##_f0); \ - doit(_b_f1, _b_f0, X##_f0, Y##_f1); \ - doit(_c_f1, _c_f0, X##_f1, Y##_f0); \ - doit(_FP_FRAC_WORD_4(_z,3), _FP_FRAC_WORD_4(_z,2), X##_f1, Y##_f1); \ - \ - __FP_FRAC_ADD_4(_FP_FRAC_WORD_4(_z,3),_FP_FRAC_WORD_4(_z,2), \ - _FP_FRAC_WORD_4(_z,1),_FP_FRAC_WORD_4(_z,0), \ - 0, _b_f1, _b_f0, 0, \ - _FP_FRAC_WORD_4(_z,3),_FP_FRAC_WORD_4(_z,2), \ - _FP_FRAC_WORD_4(_z,1),_FP_FRAC_WORD_4(_z,0)); \ - __FP_FRAC_ADD_4(_FP_FRAC_WORD_4(_z,3),_FP_FRAC_WORD_4(_z,2), \ - _FP_FRAC_WORD_4(_z,1),_FP_FRAC_WORD_4(_z,0), \ - 0, _c_f1, _c_f0, 0, \ - _FP_FRAC_WORD_4(_z,3),_FP_FRAC_WORD_4(_z,2), \ - _FP_FRAC_WORD_4(_z,1),_FP_FRAC_WORD_4(_z,0)); \ - \ - /* Normalize since we know where the msb of the multiplicands \ - were (bit B), we know that the msb of the of the product is \ - at either 2B or 2B-1. */ \ - _FP_FRAC_SRS_4(_z, _FP_WFRACBITS_##fs-1, 2*_FP_WFRACBITS_##fs); \ - R##_f0 = _FP_FRAC_WORD_4(_z,0); \ - R##_f1 = _FP_FRAC_WORD_4(_z,1); \ - } while (0) - -/* This next macro appears to be totally broken. Fortunately nowhere - * seems to use it :-> The problem is that we define _z[4] but - * then use it in _FP_FRAC_SRS_4, which will attempt to access - * _z_f[n] which will cause an error. The fix probably involves - * declaring it with _FP_FRAC_DECL_4, see previous macro. -- PMM 02/1998 - */ -#define _FP_MUL_MEAT_2_gmp(fs, R, X, Y) \ - do { \ - _FP_W_TYPE _x[2], _y[2], _z[4]; \ - _x[0] = X##_f0; _x[1] = X##_f1; \ - _y[0] = Y##_f0; _y[1] = Y##_f1; \ - \ - mpn_mul_n(_z, _x, _y, 2); \ - \ - /* Normalize since we know where the msb of the multiplicands \ - were (bit B), we know that the msb of the of the product is \ - at either 2B or 2B-1. */ \ - _FP_FRAC_SRS_4(_z, _FP_WFRACBITS##_fs-1, 2*_FP_WFRACBITS_##fs); \ - R##_f0 = _z[0]; \ - R##_f1 = _z[1]; \ - } while (0) - - -/* - * Division algorithms: - * This seems to be giving me difficulties -- PMM - * Look, NetBSD seems to be able to comment algorithms. Can't you? - * I've thrown printks at the problem. - * This now appears to work, but I still don't really know why. - * Also, I don't think the result is properly normalised... - */ - -#define _FP_DIV_MEAT_2_udiv_64(fs, R, X, Y) \ - do { \ - extern void _fp_udivmodti4(_FP_W_TYPE q[2], _FP_W_TYPE r[2], \ - _FP_W_TYPE n1, _FP_W_TYPE n0, \ - _FP_W_TYPE d1, _FP_W_TYPE d0); \ - _FP_W_TYPE _n_f3, _n_f2, _n_f1, _n_f0, _r_f1, _r_f0; \ - _FP_W_TYPE _q_f1, _q_f0, _m_f1, _m_f0; \ - _FP_W_TYPE _rmem[2], _qmem[2]; \ - /* I think this check is to ensure that the result is normalised. \ - * Assuming X,Y normalised (ie in [1.0,2.0)) X/Y will be in \ - * [0.5,2.0). Furthermore, it will be less than 1.0 iff X < Y. \ - * In this case we tweak things. (this is based on comments in \ - * the NetBSD FPU emulation code. ) \ - * We know X,Y are normalised because we ensure this as part of \ - * the unpacking process. -- PMM \ - */ \ - if (_FP_FRAC_GT_2(X, Y)) \ - { \ -/* R##_e++; */ \ - _n_f3 = X##_f1 >> 1; \ - _n_f2 = X##_f1 << (_FP_W_TYPE_SIZE - 1) | X##_f0 >> 1; \ - _n_f1 = X##_f0 << (_FP_W_TYPE_SIZE - 1); \ - _n_f0 = 0; \ - } \ - else \ - { \ - R##_e--; \ - _n_f3 = X##_f1; \ - _n_f2 = X##_f0; \ - _n_f1 = _n_f0 = 0; \ - } \ - \ - /* Normalize, i.e. make the most significant bit of the \ - denominator set. CHANGED: - 1 to nothing -- PMM */ \ - _FP_FRAC_SLL_2(Y, _FP_WFRACXBITS_##fs /* -1 */); \ - \ - /* Do the 256/128 bit division given the 128-bit _fp_udivmodtf4 \ - primitive snagged from libgcc2.c. */ \ - \ - _fp_udivmodti4(_qmem, _rmem, _n_f3, _n_f2, 0, Y##_f1); \ - _q_f1 = _qmem[0]; \ - umul_ppmm(_m_f1, _m_f0, _q_f1, Y##_f0); \ - _r_f1 = _rmem[0]; \ - _r_f0 = _n_f1; \ - if (_FP_FRAC_GT_2(_m, _r)) \ - { \ - _q_f1--; \ - _FP_FRAC_ADD_2(_r, _r, Y); \ - if (_FP_FRAC_GE_2(_r, Y) && _FP_FRAC_GT_2(_m, _r)) \ - { \ - _q_f1--; \ - _FP_FRAC_ADD_2(_r, _r, Y); \ - } \ - } \ - _FP_FRAC_SUB_2(_r, _r, _m); \ - \ - _fp_udivmodti4(_qmem, _rmem, _r_f1, _r_f0, 0, Y##_f1); \ - _q_f0 = _qmem[0]; \ - umul_ppmm(_m_f1, _m_f0, _q_f0, Y##_f0); \ - _r_f1 = _rmem[0]; \ - _r_f0 = _n_f0; \ - if (_FP_FRAC_GT_2(_m, _r)) \ - { \ - _q_f0--; \ - _FP_FRAC_ADD_2(_r, _r, Y); \ - if (_FP_FRAC_GE_2(_r, Y) && _FP_FRAC_GT_2(_m, _r)) \ - { \ - _q_f0--; \ - _FP_FRAC_ADD_2(_r, _r, Y); \ - } \ - } \ - _FP_FRAC_SUB_2(_r, _r, _m); \ - \ - R##_f1 = _q_f1; \ - R##_f0 = _q_f0 | ((_r_f1 | _r_f0) != 0); \ - /* adjust so answer is normalized again. I'm not sure what the \ - * final sz param should be. In practice it's never used since \ - * N is 1 which is always going to be < _FP_W_TYPE_SIZE... \ - */ \ - /* _FP_FRAC_SRS_2(R,1,_FP_WFRACBITS_##fs); */ \ - } while (0) - - -#define _FP_DIV_MEAT_2_gmp(fs, R, X, Y) \ - do { \ - _FP_W_TYPE _x[4], _y[2], _z[4]; \ - _y[0] = Y##_f0; _y[1] = Y##_f1; \ - _x[0] = _x[3] = 0; \ - if (_FP_FRAC_GT_2(X, Y)) \ - { \ - R##_e++; \ - _x[1] = (X##_f0 << (_FP_WFRACBITS-1 - _FP_W_TYPE_SIZE) | \ - X##_f1 >> (_FP_W_TYPE_SIZE - \ - (_FP_WFRACBITS-1 - _FP_W_TYPE_SIZE))); \ - _x[2] = X##_f1 << (_FP_WFRACBITS-1 - _FP_W_TYPE_SIZE); \ - } \ - else \ - { \ - _x[1] = (X##_f0 << (_FP_WFRACBITS - _FP_W_TYPE_SIZE) | \ - X##_f1 >> (_FP_W_TYPE_SIZE - \ - (_FP_WFRACBITS - _FP_W_TYPE_SIZE))); \ - _x[2] = X##_f1 << (_FP_WFRACBITS - _FP_W_TYPE_SIZE); \ - } \ - \ - (void) mpn_divrem (_z, 0, _x, 4, _y, 2); \ - R##_f1 = _z[1]; \ - R##_f0 = _z[0] | ((_x[0] | _x[1]) != 0); \ - } while (0) - - -/* - * Square root algorithms: - * We have just one right now, maybe Newton approximation - * should be added for those machines where division is fast. - */ - -#define _FP_SQRT_MEAT_2(R, S, T, X, q) \ - do { \ - while (q) \ - { \ - T##_f1 = S##_f1 + q; \ - if (T##_f1 <= X##_f1) \ - { \ - S##_f1 = T##_f1 + q; \ - X##_f1 -= T##_f1; \ - R##_f1 += q; \ - } \ - _FP_FRAC_SLL_2(X, 1); \ - q >>= 1; \ - } \ - q = (_FP_W_TYPE)1 << (_FP_W_TYPE_SIZE - 1); \ - while (q) \ - { \ - T##_f0 = S##_f0 + q; \ - T##_f1 = S##_f1; \ - if (T##_f1 < X##_f1 || \ - (T##_f1 == X##_f1 && T##_f0 < X##_f0)) \ - { \ - S##_f0 = T##_f0 + q; \ - if (((_FP_WS_TYPE)T##_f0) < 0 && \ - ((_FP_WS_TYPE)S##_f0) >= 0) \ - S##_f1++; \ - _FP_FRAC_SUB_2(X, X, T); \ - R##_f0 += q; \ - } \ - _FP_FRAC_SLL_2(X, 1); \ - q >>= 1; \ - } \ - } while (0) - - -/* - * Assembly/disassembly for converting to/from integral types. - * No shifting or overflow handled here. - */ - -#define _FP_FRAC_ASSEMBLE_2(r, X, rsize) \ - do { \ - if (rsize <= _FP_W_TYPE_SIZE) \ - r = X##_f0; \ - else \ - { \ - r = X##_f1; \ - r <<= _FP_W_TYPE_SIZE; \ - r += X##_f0; \ - } \ - } while (0) - -#define _FP_FRAC_DISASSEMBLE_2(X, r, rsize) \ - do { \ - X##_f0 = r; \ - X##_f1 = (rsize <= _FP_W_TYPE_SIZE ? 0 : r >> _FP_W_TYPE_SIZE); \ - } while (0) - -/* - * Convert FP values between word sizes - */ - -#define _FP_FRAC_CONV_1_2(dfs, sfs, D, S) \ - do { \ - _FP_FRAC_SRS_2(S, (_FP_WFRACBITS_##sfs - _FP_WFRACBITS_##dfs), \ - _FP_WFRACBITS_##sfs); \ - D##_f = S##_f0; \ - } while (0) - -#define _FP_FRAC_CONV_2_1(dfs, sfs, D, S) \ - do { \ - D##_f0 = S##_f; \ - D##_f1 = 0; \ - _FP_FRAC_SLL_2(D, (_FP_WFRACBITS_##dfs - _FP_WFRACBITS_##sfs)); \ - } while (0) - |