systfloat.S revision 1.2
1 /* $NetBSD: systfloat.S,v 1.2 2001/03/13 07:43:19 ross Exp $ */ 2 3 /* This is a derivative work. */ 4 5 /*- 6 * Copyright (c) 2001 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Ross Harvey. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 =============================================================================== 43 44 This GNU assembler source file is part of TestFloat, Release 2a, a package 45 of programs for testing the correctness of floating-point arithmetic 46 complying to the IEC/IEEE Standard for Floating-Point. 47 48 Written by John R. Hauser. More information is available through the Web 49 page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'. 50 51 THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort 52 has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT 53 TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO 54 PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY 55 AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. 56 57 Derivative works are acceptable, even for commercial purposes, so long as 58 (1) they include prominent notice that the work is derivative, and (2) they 59 include prominent notice akin to these four paragraphs for those parts of 60 this code that are retained. 61 62 =============================================================================== 63 */ 64 65 .text 66 67 /* 68 ------------------------------------------------------------------------------- 69 ------------------------------------------------------------------------------- 70 */ 71 72 #include <machine/asm.h> 73 74 ENTRY(syst_int32_to_floatx80) 75 fildl 8(%esp) 76 movl 4(%esp),%eax 77 fstpt (%eax) 78 ret $4 79 80 /* 81 ------------------------------------------------------------------------------- 82 ------------------------------------------------------------------------------- 83 */ 84 85 ENTRY(syst_int64_to_floatx80) 86 fildq 8(%esp) 87 movl 4(%esp),%eax 88 fstpt (%eax) 89 ret $4 90 91 /* 92 ------------------------------------------------------------------------------- 93 ------------------------------------------------------------------------------- 94 */ 95 ENTRY(syst_float32_to_floatx80) 96 flds 8(%esp) 97 movl 4(%esp),%eax 98 fstpt (%eax) 99 ret $4 100 101 /* 102 ------------------------------------------------------------------------------- 103 ------------------------------------------------------------------------------- 104 */ 105 ENTRY(syst_float64_to_floatx80) 106 fldl 8(%esp) 107 movl 4(%esp),%eax 108 fstpt (%eax) 109 ret $4 110 111 /* 112 ------------------------------------------------------------------------------- 113 ------------------------------------------------------------------------------- 114 */ 115 ENTRY(syst_floatx80_to_int32) 116 fldt 4(%esp) 117 subl $4,%esp 118 fistpl (%esp) 119 movl (%esp),%eax 120 addl $4,%esp 121 ret 122 123 /* 124 ------------------------------------------------------------------------------- 125 ------------------------------------------------------------------------------- 126 */ 127 ENTRY(syst_floatx80_to_int64) 128 fldt 4(%esp) 129 subl $8,%esp 130 fistpq (%esp) 131 movl (%esp),%eax 132 movl 4(%esp),%edx 133 addl $8,%esp 134 ret 135 136 /* 137 ------------------------------------------------------------------------------- 138 ------------------------------------------------------------------------------- 139 */ 140 ENTRY(syst_floatx80_to_float32) 141 fldt 4(%esp) 142 subl $4,%esp 143 fstps (%esp) 144 movl (%esp),%eax 145 addl $4,%esp 146 ret 147 148 /* 149 ------------------------------------------------------------------------------- 150 ------------------------------------------------------------------------------- 151 */ 152 ENTRY(syst_floatx80_to_float64) 153 fldt 4(%esp) 154 subl $8,%esp 155 fstpl (%esp) 156 movl 4(%esp),%edx 157 movl (%esp),%eax 158 addl $8,%esp 159 ret 160 161 /* 162 ------------------------------------------------------------------------------- 163 ------------------------------------------------------------------------------- 164 */ 165 ENTRY(syst_floatx80_round_to_int) 166 fldt 8(%esp) 167 frndint 168 movl 4(%esp),%eax 169 fstpt (%eax) 170 ret $4 171 172 /* 173 ------------------------------------------------------------------------------- 174 ------------------------------------------------------------------------------- 175 */ 176 ENTRY(syst_floatx80_add) 177 fldt 8(%esp) 178 fldt 20(%esp) 179 faddp 180 movl 4(%esp),%eax 181 fstpt (%eax) 182 ret $4 183 184 /* 185 ------------------------------------------------------------------------------- 186 ------------------------------------------------------------------------------- 187 */ 188 ENTRY(syst_floatx80_sub) 189 fldt 8(%esp) 190 fldt 20(%esp) 191 fsubrp 192 movl 4(%esp),%eax 193 fstpt (%eax) 194 ret $4 195 196 /* 197 ------------------------------------------------------------------------------- 198 ------------------------------------------------------------------------------- 199 */ 200 ENTRY(syst_floatx80_mul) 201 fldt 8(%esp) 202 fldt 20(%esp) 203 fmulp 204 movl 4(%esp),%eax 205 fstpt (%eax) 206 ret $4 207 208 /* 209 ------------------------------------------------------------------------------- 210 ------------------------------------------------------------------------------- 211 */ 212 ENTRY(syst_floatx80_div) 213 fldt 8(%esp) 214 fldt 20(%esp) 215 fdivrp 216 movl 4(%esp),%eax 217 fstpt (%eax) 218 ret $4 219 220 /* 221 ------------------------------------------------------------------------------- 222 ------------------------------------------------------------------------------- 223 */ 224 ENTRY(syst_floatx80_rem) 225 fldt 20(%esp) 226 fldt 8(%esp) 227 floatx80_rem_loop: 228 fprem1 229 fnstsw %ax 230 btw $10,%ax 231 jc floatx80_rem_loop 232 movl 4(%esp),%eax 233 fstpt (%eax) 234 fstp %st(0) 235 ret $4 236 237 /* 238 ------------------------------------------------------------------------------- 239 ------------------------------------------------------------------------------- 240 */ 241 ENTRY(syst_floatx80_sqrt) 242 fldt 8(%esp) 243 fsqrt 244 movl 4(%esp),%eax 245 fstpt (%eax) 246 ret $4 247 248 /* 249 ------------------------------------------------------------------------------- 250 ------------------------------------------------------------------------------- 251 */ 252 ENTRY(syst_floatx80_eq) 253 fldt 16(%esp) 254 fldt 4(%esp) 255 fucompp 256 fnstsw %ax 257 andw $17664,%ax 258 cmpw $16384,%ax 259 seteb %al 260 movzb %al,%eax 261 ret 262 263 /* 264 ------------------------------------------------------------------------------- 265 ------------------------------------------------------------------------------- 266 */ 267 ENTRY(syst_floatx80_le) 268 fldt 4(%esp) 269 fldt 16(%esp) 270 fcompp 271 fnstsw %ax 272 notl %eax 273 shrl $8,%eax 274 andl $1,%eax 275 ret 276 277 /* 278 ------------------------------------------------------------------------------- 279 ------------------------------------------------------------------------------- 280 */ 281 ENTRY(syst_floatx80_lt) 282 fldt 4(%esp) 283 fldt 16(%esp) 284 fcompp 285 fnstsw %ax 286 andw $17664,%ax 287 setzb %al 288 movzb %al,%eax 289 ret 290 291 /* 292 ------------------------------------------------------------------------------- 293 ------------------------------------------------------------------------------- 294 */ 295 ENTRY(syst_floatx80_eq_signaling) 296 fldt 16(%esp) 297 fldt 4(%esp) 298 fcompp 299 fnstsw %ax 300 andw $17664,%ax 301 cmpw $16384,%ax 302 seteb %al 303 movzb %al,%eax 304 ret 305 306 /* 307 ------------------------------------------------------------------------------- 308 ------------------------------------------------------------------------------- 309 */ 310 ENTRY(syst_floatx80_le_quiet) 311 fldt 4(%esp) 312 fldt 16(%esp) 313 fucompp 314 fnstsw %ax 315 notl %eax 316 shrl $8,%eax 317 andl $1,%eax 318 ret 319 320 /* 321 ------------------------------------------------------------------------------- 322 ------------------------------------------------------------------------------- 323 */ 324 325 ENTRY(syst_floatx80_lt_quiet) 326 fldt 4(%esp) 327 fldt 16(%esp) 328 fucompp 329 fnstsw %ax 330 andw $17664,%ax 331 setzb %al 332 movzb %al,%eax 333 ret 334 335 /* 336 ------------------------------------------------------------------------------- 337 ------------------------------------------------------------------------------- 338 */ 339 340 ENTRY(syst_floatx80_to_int32_round_to_zero) 341 pushl %ebp 342 movl %esp,%ebp 343 subl $12,%esp 344 fldt 8(%ebp) 345 fnstcw -4(%ebp) 346 movl -4(%ebp),%edx 347 movb $12,%dh 348 movl %edx,-12(%ebp) 349 fldcw -12(%ebp) 350 fistpl -12(%ebp) 351 movl -12(%ebp),%eax 352 fldcw -4(%ebp) 353 leave 354 ret 355 356 /* 357 ------------------------------------------------------------------------------- 358 ------------------------------------------------------------------------------- 359 */ 360 361 ENTRY(syst_floatx80_to_int64_round_to_zero) 362 pushl %ebp 363 movl %esp,%ebp 364 subl $12,%esp 365 fldt 8(%ebp) 366 fnstcw -4(%ebp) 367 movl -4(%ebp),%ecx 368 movb $12,%ch 369 movl %ecx,-12(%ebp) 370 fldcw -12(%ebp) 371 fistpq -12(%ebp) 372 movl -12(%ebp),%eax 373 movl -8(%ebp),%edx 374 fldcw -4(%ebp) 375 leave 376 ret 377
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