| /* Copyright (C) 2007 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 2, or (at your option) any later |
| version. |
| |
| In addition to the permissions in the GNU General Public License, the |
| Free Software Foundation gives you unlimited permission to link the |
| compiled version of this file into combinations with other programs, |
| and to distribute those combinations without any restriction coming |
| from the use of this file. (The General Public License restrictions |
| do apply in other respects; for example, they cover modification of |
| the file, and distribution when not linked into a combine |
| executable.) |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| #undef IN_LIBGCC2 |
| #include "bid-dpd.h" |
| |
| /* get full 64x64bit product */ |
| #define __mul_64x64_to_128(P, CX, CY) \ |
| { \ |
| UINT64 CXH, CXL, CYH,CYL,PL,PH,PM,PM2; \ |
| CXH = (CX) >> 32; \ |
| CXL = (UINT32)(CX); \ |
| CYH = (CY) >> 32; \ |
| CYL = (UINT32)(CY); \ |
| \ |
| PM = CXH*CYL; \ |
| PH = CXH*CYH; \ |
| PL = CXL*CYL; \ |
| PM2 = CXL*CYH; \ |
| PH += (PM>>32); \ |
| PM = (UINT64)((UINT32)PM)+PM2+(PL>>32); \ |
| \ |
| (P).w[1] = PH + (PM>>32); \ |
| (P).w[0] = (PM<<32)+(UINT32)PL; \ |
| } |
| |
| /* add 64-bit value to 128-bit */ |
| #define __add_128_64(R128, A128, B64) \ |
| { \ |
| UINT64 R64H; \ |
| R64H = (A128).w[1]; \ |
| (R128).w[0] = (B64) + (A128).w[0]; \ |
| if((R128).w[0] < (B64)) R64H ++; \ |
| (R128).w[1] = R64H; \ |
| } |
| |
| /* add 128-bit value to 128-bit (assume no carry-out) */ |
| #define __add_128_128(R128, A128, B128) \ |
| { \ |
| UINT128 Q128; \ |
| Q128.w[1] = (A128).w[1]+(B128).w[1]; \ |
| Q128.w[0] = (B128).w[0] + (A128).w[0]; \ |
| if(Q128.w[0] < (B128).w[0]) Q128.w[1] ++; \ |
| (R128).w[1] = Q128.w[1]; \ |
| (R128).w[0] = Q128.w[0]; \ |
| } |
| |
| #define __mul_128x128_high(Q, A, B) \ |
| { \ |
| UINT128 ALBL, ALBH, AHBL, AHBH, QM, QM2; \ |
| \ |
| __mul_64x64_to_128(ALBH, (A).w[0], (B).w[1]); \ |
| __mul_64x64_to_128(AHBL, (B).w[0], (A).w[1]); \ |
| __mul_64x64_to_128(ALBL, (A).w[0], (B).w[0]); \ |
| __mul_64x64_to_128(AHBH, (A).w[1],(B).w[1]); \ |
| \ |
| __add_128_128(QM, ALBH, AHBL); \ |
| __add_128_64(QM2, QM, ALBL.w[1]); \ |
| __add_128_64((Q), AHBH, QM2.w[1]); \ |
| } |
| |
| #include "bid2dpd_dpd2bid.h" |
| |
| static const unsigned int dm103[] = |
| { 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 11000 }; |
| |
| void _bid_to_dpd32 (_Decimal32 *, _Decimal32 *); |
| |
| void |
| _bid_to_dpd32 (_Decimal32 *pres, _Decimal32 *px) { |
| unsigned int sign, coefficient_x, exp, dcoeff; |
| unsigned int b2, b1, b0, b01, res; |
| _Decimal32 x = *px; |
| |
| sign = (x & 0x80000000); |
| if ((x & 0x60000000ul) == 0x60000000ul) { |
| /* special encodings */ |
| if ((x & 0x78000000ul) == 0x78000000ul) { |
| *pres = x; /* NaN or Infinity */ |
| return; |
| } |
| /* coefficient */ |
| coefficient_x = (x & 0x001ffffful) | 0x00800000ul; |
| if (coefficient_x >= 10000000) coefficient_x = 0; |
| /* get exponent */ |
| exp = (x >> 21) & 0xff; |
| } else { |
| exp = (x >> 23) & 0xff; |
| coefficient_x = (x & 0x007ffffful); |
| } |
| b01 = coefficient_x / 1000; |
| b2 = coefficient_x - 1000 * b01; |
| b0 = b01 / 1000; |
| b1 = b01 - 1000 * b0; |
| dcoeff = b2d[b2] | b2d2[b1]; |
| if (b0 >= 8) { /* is b0 8 or 9? */ |
| res = sign | ((0x600 | ((exp >> 6) << 7) | |
| ((b0 & 1) << 6) | (exp & 0x3f)) << 20) | dcoeff; |
| } else { /* else b0 is 0..7 */ |
| res = sign | ((((exp >> 6) << 9) | (b0 << 6) | |
| (exp & 0x3f)) << 20) | dcoeff; |
| } |
| *pres = res; |
| } |
| |
| void _dpd_to_bid32 (_Decimal32 *, _Decimal32 *); |
| |
| void |
| _dpd_to_bid32 (_Decimal32 *pres, _Decimal32 *px) { |
| unsigned int r; |
| unsigned int sign, exp, bcoeff; |
| UINT64 trailing; |
| unsigned int d0, d1, d2; |
| _Decimal32 x = *px; |
| |
| sign = (x & 0x80000000); |
| trailing = (x & 0x000fffff); |
| if ((x & 0x78000000) == 0x78000000) { |
| *pres = x; |
| return; |
| } else { /* normal number */ |
| if ((x & 0x60000000) == 0x60000000) { /* G0..G1 = 11 -> d0 = 8 + G4 */ |
| d0 = d2b3[((x >> 26) & 1) | 8]; /* d0 = (comb & 0x0100 ? 9 : 8); */ |
| exp = (x >> 27) & 3; /* exp leading bits are G2..G3 */ |
| } else { |
| d0 = d2b3[(x >> 26) & 0x7]; |
| exp = (x >> 29) & 3; /* exp loading bits are G0..G1 */ |
| } |
| d1 = d2b2[(trailing >> 10) & 0x3ff]; |
| d2 = d2b[(trailing) & 0x3ff]; |
| bcoeff = d2 + d1 + d0; |
| exp = (exp << 6) + ((x >> 20) & 0x3f); |
| if (bcoeff < (1 << 23)) { |
| r = exp; |
| r <<= 23; |
| r |= (bcoeff | sign); |
| } else { |
| r = exp; |
| r <<= 21; |
| r |= (sign | 0x60000000ul); |
| /* add coeff, without leading bits */ |
| r |= (((unsigned int) bcoeff) & 0x1fffff); |
| } |
| } |
| *pres = r; |
| } |
| |
| void _bid_to_dpd64 (_Decimal64 *, _Decimal64 *); |
| |
| void |
| _bid_to_dpd64 (_Decimal64 *pres, _Decimal64 *px) { |
| UINT64 res; |
| UINT64 sign, comb, exp, B34, B01; |
| UINT64 d103, D61; |
| UINT64 b0, b2, b3, b5; |
| unsigned int b1, b4; |
| UINT64 bcoeff; |
| UINT64 dcoeff; |
| unsigned int yhi, ylo; |
| _Decimal64 x = *px; |
| |
| sign = (x & 0x8000000000000000ull); |
| comb = (x & 0x7ffc000000000000ull) >> 51; |
| if ((comb & 0xf00) == 0xf00) { |
| *pres = x; |
| return; |
| } else { /* Normal number */ |
| if ((comb & 0xc00) == 0xc00) { /* G0..G1 = 11 -> exp is G2..G11 */ |
| exp = (comb) & 0x3ff; |
| bcoeff = (x & 0x0007ffffffffffffull) | 0x0020000000000000ull; |
| } else { |
| exp = (comb >> 2) & 0x3ff; |
| bcoeff = (x & 0x001fffffffffffffull); |
| } |
| D61 = 2305843009ull; /* Floor(2^61 / 10^9) */ |
| /* Multiply the binary coefficient by ceil(2^64 / 1000), and take the upper |
| 64-bits in order to compute a division by 1000. */ |
| yhi = (D61 * (UINT64)(bcoeff >> (UINT64)27)) >> (UINT64)34; |
| ylo = bcoeff - 1000000000ull * yhi; |
| if (ylo >= 1000000000) { |
| ylo = ylo - 1000000000; |
| yhi = yhi + 1; |
| } |
| d103 = 0x4189374c; |
| B34 = ((UINT64) ylo * d103) >> (32 + 8); |
| B01 = ((UINT64) yhi * d103) >> (32 + 8); |
| b5 = ylo - B34 * 1000; |
| b2 = yhi - B01 * 1000; |
| b3 = ((UINT64) B34 * d103) >> (32 + 8); |
| b0 = ((UINT64) B01 * d103) >> (32 + 8); |
| b4 = (unsigned int) B34 - (unsigned int) b3 *1000; |
| b1 = (unsigned int) B01 - (unsigned int) dm103[b0]; |
| dcoeff = b2d[b5] | b2d2[b4] | b2d3[b3] | b2d4[b2] | b2d5[b1]; |
| if (b0 >= 8) /* is b0 8 or 9? */ |
| res = sign | ((0x1800 | ((exp >> 8) << 9) | ((b0 & 1) << 8) | |
| (exp & 0xff)) << 50) | dcoeff; |
| else /* else b0 is 0..7 */ |
| res = sign | ((((exp >> 8) << 11) | (b0 << 8) | |
| (exp & 0xff)) << 50) | dcoeff; |
| } |
| *pres = res; |
| } |
| |
| void _dpd_to_bid64 (_Decimal64 *, _Decimal64 *); |
| |
| void |
| _dpd_to_bid64 (_Decimal64 *pres, _Decimal64 *px) { |
| UINT64 res; |
| UINT64 sign, comb, exp; |
| UINT64 trailing; |
| UINT64 d0, d1, d2; |
| unsigned int d3, d4, d5; |
| UINT64 bcoeff, mask; |
| _Decimal64 x = *px; |
| |
| sign = (x & 0x8000000000000000ull); |
| comb = (x & 0x7ffc000000000000ull) >> 50; |
| trailing = (x & 0x0003ffffffffffffull); |
| if ((comb & 0x1e00) == 0x1e00) { |
| if ((comb & 0x1f00) == 0x1f00) { /* G0..G4 = 11111 -> NaN */ |
| if (comb & 0x0100) { /* G5 = 1 -> sNaN */ |
| *pres = x; |
| } else { /* G5 = 0 -> qNaN */ |
| *pres = x; |
| } |
| } else { /*if ((comb & 0x1e00) == 0x1e00); G0..G4 = 11110 -> INF */ |
| *pres = x; |
| } |
| return; |
| } else { /* normal number */ |
| if ((comb & 0x1800) == 0x1800) { /* G0..G1 = 11 -> d0 = 8 + G4 */ |
| d0 = d2b6[((comb >> 8) & 1) | 8]; /* d0 = (comb & 0x0100 ? 9 : 8); */ |
| exp = (comb & 0x600) >> 1; /* exp = (comb & 0x0400 ? 1 : 0) * 0x200 + |
| (comb & 0x0200 ? 1 : 0) * 0x100; exp leading bits are G2..G3 */ |
| } else { |
| d0 = d2b6[(comb >> 8) & 0x7]; |
| exp = (comb & 0x1800) >> 3; /* exp = (comb & 0x1000 ? 1 : 0) * 0x200 + |
| (comb & 0x0800 ? 1 : 0) * 0x100; exp loading bits are G0..G1 */ |
| } |
| d1 = d2b5[(trailing >> 40) & 0x3ff]; |
| d2 = d2b4[(trailing >> 30) & 0x3ff]; |
| d3 = d2b3[(trailing >> 20) & 0x3ff]; |
| d4 = d2b2[(trailing >> 10) & 0x3ff]; |
| d5 = d2b[(trailing) & 0x3ff]; |
| bcoeff = (d5 + d4 + d3) + d2 + d1 + d0; |
| exp += (comb & 0xff); |
| mask = 1; |
| mask <<= 53; |
| if (bcoeff < mask) { /* check whether coefficient fits in 10*5+3 bits */ |
| res = exp; |
| res <<= 53; |
| res |= (bcoeff | sign); |
| *pres = res; |
| return; |
| } |
| /* special format */ |
| res = (exp << 51) | (sign | 0x6000000000000000ull); |
| /* add coeff, without leading bits */ |
| mask = (mask >> 2) - 1; |
| bcoeff &= mask; |
| res |= bcoeff; |
| } |
| *pres = res; |
| } |
| |
| void _bid_to_dpd128 (_Decimal128 *, _Decimal128 *); |
| |
| void |
| _bid_to_dpd128 (_Decimal128 *pres, _Decimal128 *px) { |
| UINT128 res; |
| UINT128 sign; |
| unsigned int comb; |
| UINT128 bcoeff; |
| UINT128 dcoeff; |
| UINT128 BH, d1018, BT2, BT1; |
| UINT64 exp, BL, d109; |
| UINT64 d106, d103; |
| UINT64 k1, k2, k4, k5, k7, k8, k10, k11; |
| unsigned int BHH32, BLL32, BHL32, BLH32, k0, k3, k6, k9, amount; |
| _Decimal128 x = *px; |
| |
| sign.w[1] = (x.w[1] & 0x8000000000000000ull); |
| sign.w[0] = 0; |
| comb = (x.w[1] /*& 0x7fffc00000000000ull */ ) >> 46; |
| exp = 0; |
| if ((comb & 0x1e000) == 0x1e000) { |
| if ((comb & 0x1f000) == 0x1f000) { /* G0..G4 = 11111 -> NaN */ |
| if (comb & 0x01000) { /* G5 = 1 -> sNaN */ |
| res = x; |
| } else { /* G5 = 0 -> qNaN */ |
| res = x; |
| } |
| } else { /* G0..G4 = 11110 -> INF */ |
| res = x; |
| } |
| } else { /* normal number */ |
| exp = ((x.w[1] & 0x7fff000000000000ull) >> 49) & 0x3fff; |
| bcoeff.w[1] = (x.w[1] & 0x0001ffffffffffffull); |
| bcoeff.w[0] = x.w[0]; |
| d1018 = reciprocals10_128[18]; |
| __mul_128x128_high (BH, bcoeff, d1018); |
| amount = recip_scale[18]; |
| BH.w[0] = (BH.w[0] >> amount) | (BH.w[1] << (64 - amount)); |
| BL = bcoeff.w[0] - BH.w[0] * 1000000000000000000ull; |
| d109 = reciprocals10_64[9]; |
| __mul_64x64_to_128 (BT1, BH.w[0], d109); |
| BHH32 = (unsigned int) (BT1.w[1] >> short_recip_scale[9]); |
| BHL32 = (unsigned int) BH.w[0] - BHH32 * 1000000000; |
| __mul_64x64_to_128 (BT2, BL, d109); |
| BLH32 = (unsigned int) (BT2.w[1] >> short_recip_scale[9]); |
| BLL32 = (unsigned int) BL - BLH32 * 1000000000; |
| d106 = 0x431BDE83; |
| d103 = 0x4189374c; |
| k0 = ((UINT64) BHH32 * d106) >> (32 + 18); |
| BHH32 -= (unsigned int) k0 *1000000; |
| k1 = ((UINT64) BHH32 * d103) >> (32 + 8); |
| k2 = BHH32 - (unsigned int) k1 *1000; |
| k3 = ((UINT64) BHL32 * d106) >> (32 + 18); |
| BHL32 -= (unsigned int) k3 *1000000; |
| k4 = ((UINT64) BHL32 * d103) >> (32 + 8); |
| k5 = BHL32 - (unsigned int) k4 *1000; |
| k6 = ((UINT64) BLH32 * d106) >> (32 + 18); |
| BLH32 -= (unsigned int) k6 *1000000; |
| k7 = ((UINT64) BLH32 * d103) >> (32 + 8); |
| k8 = BLH32 - (unsigned int) k7 *1000; |
| k9 = ((UINT64) BLL32 * d106) >> (32 + 18); |
| BLL32 -= (unsigned int) k9 *1000000; |
| k10 = ((UINT64) BLL32 * d103) >> (32 + 8); |
| k11 = BLL32 - (unsigned int) k10 *1000; |
| dcoeff.w[1] = (b2d[k5] >> 4) | (b2d[k4] << 6) | (b2d[k3] << 16) | |
| (b2d[k2] << 26) | (b2d[k1] << 36); |
| dcoeff.w[0] = b2d[k11] | (b2d[k10] << 10) | (b2d[k9] << 20) | |
| (b2d[k8] << 30) | (b2d[k7] << 40) | (b2d[k6] << 50) | (b2d[k5] << 60); |
| res.w[0] = dcoeff.w[0]; |
| if (k0 >= 8) { |
| res.w[1] = sign.w[1] | ((0x18000 | ((exp >> 12) << 13) | |
| ((k0 & 1) << 12) | (exp & 0xfff)) << 46) | dcoeff.w[1]; |
| } else { |
| res.w[1] = sign.w[1] | ((((exp >> 12) << 15) | (k0 << 12) | |
| (exp & 0xfff)) << 46) | dcoeff.w[1]; |
| } |
| } |
| *pres = res; |
| } |
| |
| void _dpd_to_bid128 (_Decimal128 *, _Decimal128 *); |
| |
| void |
| _dpd_to_bid128 (_Decimal128 *pres, _Decimal128 *px) { |
| UINT128 res; |
| UINT128 sign; |
| UINT64 exp, comb; |
| UINT128 trailing; |
| UINT64 d0, d1, d2, d3, d4, d5, d6, d7, d8, d9, d10, d11; |
| UINT128 bcoeff; |
| UINT64 tl, th; |
| _Decimal128 x = *px; |
| |
| sign.w[1] = (x.w[1] & 0x8000000000000000ull); |
| sign.w[0] = 0; |
| comb = (x.w[1] & 0x7fffc00000000000ull) >> 46; |
| trailing.w[1] = x.w[1]; |
| trailing.w[0] = x.w[0]; |
| if ((comb & 0x1e000) == 0x1e000) { |
| if ((comb & 0x1f000) == 0x1f000) { /* G0..G4 = 11111 -> NaN */ |
| if (comb & 0x01000) { /* G5 = 1 -> sNaN */ |
| *pres = x; |
| } else { /* G5 = 0 -> qNaN */ |
| *pres = x; |
| } |
| } else { /* G0..G4 = 11110 -> INF */ |
| *pres = x; |
| } |
| return; |
| } else { /* Normal number */ |
| if ((comb & 0x18000) == 0x18000) { /* G0..G1 = 11 -> d0 = 8 + G4 */ |
| d0 = d2b6[8 + ((comb & 0x01000) >> 12)]; |
| exp = (comb & 0x06000) >> 1; /* exp leading bits are G2..G3 */ |
| } else { |
| d0 = d2b6[((comb & 0x07000) >> 12)]; |
| exp = (comb & 0x18000) >> 3; /* exp loading bits are G0..G1 */ |
| } |
| d11 = d2b[(trailing.w[0]) & 0x3ff]; |
| d10 = d2b2[(trailing.w[0] >> 10) & 0x3ff]; |
| d9 = d2b3[(trailing.w[0] >> 20) & 0x3ff]; |
| d8 = d2b4[(trailing.w[0] >> 30) & 0x3ff]; |
| d7 = d2b5[(trailing.w[0] >> 40) & 0x3ff]; |
| d6 = d2b6[(trailing.w[0] >> 50) & 0x3ff]; |
| d5 = d2b[(trailing.w[0] >> 60) | ((trailing.w[1] & 0x3f) << 4)]; |
| d4 = d2b2[(trailing.w[1] >> 6) & 0x3ff]; |
| d3 = d2b3[(trailing.w[1] >> 16) & 0x3ff]; |
| d2 = d2b4[(trailing.w[1] >> 26) & 0x3ff]; |
| d1 = d2b5[(trailing.w[1] >> 36) & 0x3ff]; |
| tl = d11 + d10 + d9 + d8 + d7 + d6; |
| th = d5 + d4 + d3 + d2 + d1 + d0; |
| __mul_64x64_to_128 (bcoeff, th, 1000000000000000000ull); |
| __add_128_64 (bcoeff, bcoeff, tl); |
| exp += (comb & 0xfff); |
| res.w[0] = bcoeff.w[0]; |
| res.w[1] = (exp << 49) | sign.w[1] | bcoeff.w[1]; |
| } |
| *pres = res; |
| } |
