2 * Copyright (c) 2008 David Schultz <das@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * Tests for fma{,f,l}().
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
42 #define ALL_STD_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \
43 FE_OVERFLOW | FE_UNDERFLOW)
45 #pragma STDC FENV_ACCESS ON
48 * Test that a function returns the correct value and sets the
49 * exception flags correctly. The exceptmask specifies which
50 * exceptions we should check. We need to be lenient for several
51 * reasons, but mainly because on some architectures it's impossible
52 * to raise FE_OVERFLOW without raising FE_INEXACT.
54 * These are macros instead of functions so that assert provides more
55 * meaningful error messages.
57 #define test(func, x, y, z, result, exceptmask, excepts) do { \
58 assert(feclearexcept(FE_ALL_EXCEPT) == 0); \
59 assert(fpequal((func)((x), (y), (z)), (result))); \
60 assert(((func), fetestexcept(exceptmask) == (excepts))); \
63 #define testall(x, y, z, result, exceptmask, excepts) do { \
64 test(fma, (x), (y), (z), (double)(result), (exceptmask), (excepts)); \
65 test(fmaf, (x), (y), (z), (float)(result), (exceptmask), (excepts)); \
66 test(fmal, (x), (y), (z), (result), (exceptmask), (excepts)); \
69 /* Test in all rounding modes. */
70 #define testrnd(func, x, y, z, rn, ru, rd, rz, exceptmask, excepts) do { \
71 fesetround(FE_TONEAREST); \
72 test((func), (x), (y), (z), (rn), (exceptmask), (excepts)); \
73 fesetround(FE_UPWARD); \
74 test((func), (x), (y), (z), (ru), (exceptmask), (excepts)); \
75 fesetround(FE_DOWNWARD); \
76 test((func), (x), (y), (z), (rd), (exceptmask), (excepts)); \
77 fesetround(FE_TOWARDZERO); \
78 test((func), (x), (y), (z), (rz), (exceptmask), (excepts)); \
82 * Determine whether x and y are equal, with two special rules:
87 fpequal(long double x, long double y)
90 return ((x == y && !signbit(x) == !signbit(y))
91 || (isnan(x) && isnan(y)));
97 const int rd = (fegetround() == FE_DOWNWARD);
99 testall(0.0, 0.0, 0.0, 0.0, ALL_STD_EXCEPT, 0);
100 testall(1.0, 0.0, 0.0, 0.0, ALL_STD_EXCEPT, 0);
101 testall(0.0, 1.0, 0.0, 0.0, ALL_STD_EXCEPT, 0);
102 testall(0.0, 0.0, 1.0, 1.0, ALL_STD_EXCEPT, 0);
104 testall(-0.0, 0.0, 0.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
105 testall(0.0, -0.0, 0.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
106 testall(-0.0, -0.0, 0.0, 0.0, ALL_STD_EXCEPT, 0);
107 testall(0.0, 0.0, -0.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
108 testall(-0.0, -0.0, -0.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
110 testall(-0.0, 0.0, -0.0, -0.0, ALL_STD_EXCEPT, 0);
111 testall(0.0, -0.0, -0.0, -0.0, ALL_STD_EXCEPT, 0);
113 testall(-1.0, 1.0, 1.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
114 testall(1.0, -1.0, 1.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
115 testall(-1.0, -1.0, -1.0, rd ? -0.0 : 0.0, ALL_STD_EXCEPT, 0);
117 switch (fegetround()) {
120 test(fmaf, -FLT_MIN, FLT_MIN, 0.0, -0.0,
121 ALL_STD_EXCEPT, FE_INEXACT | FE_UNDERFLOW);
122 test(fma, -DBL_MIN, DBL_MIN, 0.0, -0.0,
123 ALL_STD_EXCEPT, FE_INEXACT | FE_UNDERFLOW);
124 test(fmal, -LDBL_MIN, LDBL_MIN, 0.0, -0.0,
125 ALL_STD_EXCEPT, FE_INEXACT | FE_UNDERFLOW);
130 test_infinities(void)
133 testall(INFINITY, 1.0, -1.0, INFINITY, ALL_STD_EXCEPT, 0);
134 testall(-1.0, INFINITY, 0.0, -INFINITY, ALL_STD_EXCEPT, 0);
135 testall(0.0, 0.0, INFINITY, INFINITY, ALL_STD_EXCEPT, 0);
136 testall(1.0, 1.0, INFINITY, INFINITY, ALL_STD_EXCEPT, 0);
137 testall(1.0, 1.0, -INFINITY, -INFINITY, ALL_STD_EXCEPT, 0);
139 testall(INFINITY, -INFINITY, 1.0, -INFINITY, ALL_STD_EXCEPT, 0);
140 testall(INFINITY, INFINITY, 1.0, INFINITY, ALL_STD_EXCEPT, 0);
141 testall(-INFINITY, -INFINITY, INFINITY, INFINITY, ALL_STD_EXCEPT, 0);
143 testall(0.0, INFINITY, 1.0, NAN, ALL_STD_EXCEPT, FE_INVALID);
144 testall(INFINITY, 0.0, -0.0, NAN, ALL_STD_EXCEPT, FE_INVALID);
146 /* The invalid exception is optional in this case. */
147 testall(INFINITY, 0.0, NAN, NAN, ALL_STD_EXCEPT & ~FE_INVALID, 0);
149 testall(INFINITY, INFINITY, -INFINITY, NAN,
150 ALL_STD_EXCEPT, FE_INVALID);
151 testall(-INFINITY, INFINITY, INFINITY, NAN,
152 ALL_STD_EXCEPT, FE_INVALID);
153 testall(INFINITY, -1.0, INFINITY, NAN,
154 ALL_STD_EXCEPT, FE_INVALID);
156 test(fmaf, FLT_MAX, FLT_MAX, -INFINITY, -INFINITY, ALL_STD_EXCEPT, 0);
157 test(fma, DBL_MAX, DBL_MAX, -INFINITY, -INFINITY, ALL_STD_EXCEPT, 0);
158 test(fmal, LDBL_MAX, LDBL_MAX, -INFINITY, -INFINITY,
160 test(fmaf, FLT_MAX, -FLT_MAX, INFINITY, INFINITY, ALL_STD_EXCEPT, 0);
161 test(fma, DBL_MAX, -DBL_MAX, INFINITY, INFINITY, ALL_STD_EXCEPT, 0);
162 test(fmal, LDBL_MAX, -LDBL_MAX, INFINITY, INFINITY,
170 testall(NAN, 0.0, 0.0, NAN, ALL_STD_EXCEPT, 0);
171 testall(1.0, NAN, 1.0, NAN, ALL_STD_EXCEPT, 0);
172 testall(1.0, -1.0, NAN, NAN, ALL_STD_EXCEPT, 0);
173 testall(0.0, 0.0, NAN, NAN, ALL_STD_EXCEPT, 0);
174 testall(NAN, NAN, NAN, NAN, ALL_STD_EXCEPT, 0);
176 /* x*y should not raise an inexact/overflow/underflow if z is NaN. */
177 testall(M_PI, M_PI, NAN, NAN, ALL_STD_EXCEPT, 0);
178 test(fmaf, FLT_MIN, FLT_MIN, NAN, NAN, ALL_STD_EXCEPT, 0);
179 test(fma, DBL_MIN, DBL_MIN, NAN, NAN, ALL_STD_EXCEPT, 0);
180 test(fmal, LDBL_MIN, LDBL_MIN, NAN, NAN, ALL_STD_EXCEPT, 0);
181 test(fmaf, FLT_MAX, FLT_MAX, NAN, NAN, ALL_STD_EXCEPT, 0);
182 test(fma, DBL_MAX, DBL_MAX, NAN, NAN, ALL_STD_EXCEPT, 0);
183 test(fmal, LDBL_MAX, LDBL_MAX, NAN, NAN, ALL_STD_EXCEPT, 0);
187 * Tests for cases where z is very small compared to x*y.
193 /* x*y positive, z positive */
194 if (fegetround() == FE_UPWARD) {
195 test(fmaf, 1.0, 1.0, 0x1.0p-100, 1.0 + FLT_EPSILON,
196 ALL_STD_EXCEPT, FE_INEXACT);
197 test(fma, 1.0, 1.0, 0x1.0p-200, 1.0 + DBL_EPSILON,
198 ALL_STD_EXCEPT, FE_INEXACT);
199 test(fmal, 1.0, 1.0, 0x1.0p-200, 1.0 + LDBL_EPSILON,
200 ALL_STD_EXCEPT, FE_INEXACT);
202 testall(0x1.0p100, 1.0, 0x1.0p-100, 0x1.0p100,
203 ALL_STD_EXCEPT, FE_INEXACT);
206 /* x*y negative, z negative */
207 if (fegetround() == FE_DOWNWARD) {
208 test(fmaf, -1.0, 1.0, -0x1.0p-100, -(1.0 + FLT_EPSILON),
209 ALL_STD_EXCEPT, FE_INEXACT);
210 test(fma, -1.0, 1.0, -0x1.0p-200, -(1.0 + DBL_EPSILON),
211 ALL_STD_EXCEPT, FE_INEXACT);
212 test(fmal, -1.0, 1.0, -0x1.0p-200, -(1.0 + LDBL_EPSILON),
213 ALL_STD_EXCEPT, FE_INEXACT);
215 testall(0x1.0p100, -1.0, -0x1.0p-100, -0x1.0p100,
216 ALL_STD_EXCEPT, FE_INEXACT);
219 /* x*y positive, z negative */
220 if (fegetround() == FE_DOWNWARD || fegetround() == FE_TOWARDZERO) {
221 test(fmaf, 1.0, 1.0, -0x1.0p-100, 1.0 - FLT_EPSILON / 2,
222 ALL_STD_EXCEPT, FE_INEXACT);
223 test(fma, 1.0, 1.0, -0x1.0p-200, 1.0 - DBL_EPSILON / 2,
224 ALL_STD_EXCEPT, FE_INEXACT);
225 test(fmal, 1.0, 1.0, -0x1.0p-200, 1.0 - LDBL_EPSILON / 2,
226 ALL_STD_EXCEPT, FE_INEXACT);
228 testall(0x1.0p100, 1.0, -0x1.0p-100, 0x1.0p100,
229 ALL_STD_EXCEPT, FE_INEXACT);
232 /* x*y negative, z positive */
233 if (fegetround() == FE_UPWARD || fegetround() == FE_TOWARDZERO) {
234 test(fmaf, -1.0, 1.0, 0x1.0p-100, -1.0 + FLT_EPSILON / 2,
235 ALL_STD_EXCEPT, FE_INEXACT);
236 test(fma, -1.0, 1.0, 0x1.0p-200, -1.0 + DBL_EPSILON / 2,
237 ALL_STD_EXCEPT, FE_INEXACT);
238 test(fmal, -1.0, 1.0, 0x1.0p-200, -1.0 + LDBL_EPSILON / 2,
239 ALL_STD_EXCEPT, FE_INEXACT);
241 testall(-0x1.0p100, 1.0, 0x1.0p-100, -0x1.0p100,
242 ALL_STD_EXCEPT, FE_INEXACT);
247 * Tests for cases where z is very large compared to x*y.
253 /* z positive, x*y positive */
254 if (fegetround() == FE_UPWARD) {
255 test(fmaf, 0x1.0p-50, 0x1.0p-50, 1.0, 1.0 + FLT_EPSILON,
256 ALL_STD_EXCEPT, FE_INEXACT);
257 test(fma, 0x1.0p-100, 0x1.0p-100, 1.0, 1.0 + DBL_EPSILON,
258 ALL_STD_EXCEPT, FE_INEXACT);
259 test(fmal, 0x1.0p-100, 0x1.0p-100, 1.0, 1.0 + LDBL_EPSILON,
260 ALL_STD_EXCEPT, FE_INEXACT);
262 testall(-0x1.0p-50, -0x1.0p-50, 0x1.0p100, 0x1.0p100,
263 ALL_STD_EXCEPT, FE_INEXACT);
266 /* z negative, x*y negative */
267 if (fegetround() == FE_DOWNWARD) {
268 test(fmaf, -0x1.0p-50, 0x1.0p-50, -1.0, -(1.0 + FLT_EPSILON),
269 ALL_STD_EXCEPT, FE_INEXACT);
270 test(fma, -0x1.0p-100, 0x1.0p-100, -1.0, -(1.0 + DBL_EPSILON),
271 ALL_STD_EXCEPT, FE_INEXACT);
272 test(fmal, -0x1.0p-100, 0x1.0p-100, -1.0, -(1.0 + LDBL_EPSILON),
273 ALL_STD_EXCEPT, FE_INEXACT);
275 testall(0x1.0p-50, -0x1.0p-50, -0x1.0p100, -0x1.0p100,
276 ALL_STD_EXCEPT, FE_INEXACT);
279 /* z negative, x*y positive */
280 if (fegetround() == FE_UPWARD || fegetround() == FE_TOWARDZERO) {
281 test(fmaf, -0x1.0p-50, -0x1.0p-50, -1.0,
282 -1.0 + FLT_EPSILON / 2, ALL_STD_EXCEPT, FE_INEXACT);
283 test(fma, -0x1.0p-100, -0x1.0p-100, -1.0,
284 -1.0 + DBL_EPSILON / 2, ALL_STD_EXCEPT, FE_INEXACT);
285 test(fmal, -0x1.0p-100, -0x1.0p-100, -1.0,
286 -1.0 + LDBL_EPSILON / 2, ALL_STD_EXCEPT, FE_INEXACT);
288 testall(0x1.0p-50, 0x1.0p-50, -0x1.0p100, -0x1.0p100,
289 ALL_STD_EXCEPT, FE_INEXACT);
292 /* z positive, x*y negative */
293 if (fegetround() == FE_DOWNWARD || fegetround() == FE_TOWARDZERO) {
294 test(fmaf, 0x1.0p-50, -0x1.0p-50, 1.0, 1.0 - FLT_EPSILON / 2,
295 ALL_STD_EXCEPT, FE_INEXACT);
296 test(fma, 0x1.0p-100, -0x1.0p-100, 1.0, 1.0 - DBL_EPSILON / 2,
297 ALL_STD_EXCEPT, FE_INEXACT);
298 test(fmal, 0x1.0p-100, -0x1.0p-100, 1.0, 1.0 - LDBL_EPSILON / 2,
299 ALL_STD_EXCEPT, FE_INEXACT);
301 testall(-0x1.0p-50, 0x1.0p-50, 0x1.0p100, 0x1.0p100,
302 ALL_STD_EXCEPT, FE_INEXACT);
310 /* ilogb(x*y) - ilogb(z) = 20 */
311 testrnd(fmaf, -0x1.c139d8p-51, -0x1.600e7ap32, 0x1.26558cp-38,
312 0x1.34e48ap-18, 0x1.34e48cp-18, 0x1.34e48ap-18, 0x1.34e48ap-18,
313 ALL_STD_EXCEPT, FE_INEXACT);
314 testrnd(fma, -0x1.c139d7b84f1a3p-51, -0x1.600e7a2a16484p32,
315 0x1.26558cac31580p-38, 0x1.34e48a78aae97p-18,
316 0x1.34e48a78aae97p-18, 0x1.34e48a78aae96p-18,
317 0x1.34e48a78aae96p-18, ALL_STD_EXCEPT, FE_INEXACT);
318 #if LDBL_MANT_DIG == 113
319 testrnd(fmal, -0x1.c139d7b84f1a3079263afcc5bae3p-51L,
320 -0x1.600e7a2a164840edbe2e7d301a72p32L,
321 0x1.26558cac315807eb07e448042101p-38L,
322 0x1.34e48a78aae96c76ed36077dd387p-18L,
323 0x1.34e48a78aae96c76ed36077dd388p-18L,
324 0x1.34e48a78aae96c76ed36077dd387p-18L,
325 0x1.34e48a78aae96c76ed36077dd387p-18L,
326 ALL_STD_EXCEPT, FE_INEXACT);
327 #elif LDBL_MANT_DIG == 64
328 testrnd(fmal, -0x1.c139d7b84f1a307ap-51L, -0x1.600e7a2a164840eep32L,
329 0x1.26558cac315807ecp-38L, 0x1.34e48a78aae96c78p-18L,
330 0x1.34e48a78aae96c78p-18L, 0x1.34e48a78aae96c76p-18L,
331 0x1.34e48a78aae96c76p-18L, ALL_STD_EXCEPT, FE_INEXACT);
332 #elif LDBL_MANT_DIG == 53
333 testrnd(fmal, -0x1.c139d7b84f1a3p-51L, -0x1.600e7a2a16484p32L,
334 0x1.26558cac31580p-38L, 0x1.34e48a78aae97p-18L,
335 0x1.34e48a78aae97p-18L, 0x1.34e48a78aae96p-18L,
336 0x1.34e48a78aae96p-18L, ALL_STD_EXCEPT, FE_INEXACT);
339 /* ilogb(x*y) - ilogb(z) = -40 */
340 testrnd(fmaf, 0x1.98210ap53, 0x1.9556acp-24, 0x1.d87da4p70,
341 0x1.d87da4p70, 0x1.d87da6p70, 0x1.d87da4p70, 0x1.d87da4p70,
342 ALL_STD_EXCEPT, FE_INEXACT);
343 testrnd(fma, 0x1.98210ac83fe2bp53, 0x1.9556ac1475f0fp-24,
344 0x1.d87da3aafc60ep70, 0x1.d87da3aafda40p70,
345 0x1.d87da3aafda40p70, 0x1.d87da3aafda3fp70,
346 0x1.d87da3aafda3fp70, ALL_STD_EXCEPT, FE_INEXACT);
347 #if LDBL_MANT_DIG == 113
348 testrnd(fmal, 0x1.98210ac83fe2a8f65b6278b74cebp53L,
349 0x1.9556ac1475f0f28968b61d0de65ap-24L,
350 0x1.d87da3aafc60d830aa4c6d73b749p70L,
351 0x1.d87da3aafda3f36a69eb86488224p70L,
352 0x1.d87da3aafda3f36a69eb86488225p70L,
353 0x1.d87da3aafda3f36a69eb86488224p70L,
354 0x1.d87da3aafda3f36a69eb86488224p70L,
355 ALL_STD_EXCEPT, FE_INEXACT);
356 #elif LDBL_MANT_DIG == 64
357 testrnd(fmal, 0x1.98210ac83fe2a8f6p53L, 0x1.9556ac1475f0f28ap-24L,
358 0x1.d87da3aafc60d83p70L, 0x1.d87da3aafda3f36ap70L,
359 0x1.d87da3aafda3f36ap70L, 0x1.d87da3aafda3f368p70L,
360 0x1.d87da3aafda3f368p70L, ALL_STD_EXCEPT, FE_INEXACT);
361 #elif LDBL_MANT_DIG == 53
362 testrnd(fmal, 0x1.98210ac83fe2bp53L, 0x1.9556ac1475f0fp-24L,
363 0x1.d87da3aafc60ep70L, 0x1.d87da3aafda40p70L,
364 0x1.d87da3aafda40p70L, 0x1.d87da3aafda3fp70L,
365 0x1.d87da3aafda3fp70L, ALL_STD_EXCEPT, FE_INEXACT);
370 test_double_rounding(void)
374 * a = 0x1.8000000000001p0
375 * b = 0x1.8000000000001p0
376 * c = -0x0.0000000000000000000000000080...1p+1
377 * a * b = 0x1.2000000000001800000000000080p+1
379 * The correct behavior is to round DOWN to 0x1.2000000000001p+1 in
380 * round-to-nearest mode. An implementation that computes a*b+c in
381 * double+double precision, however, will get 0x1.20000000000018p+1,
384 fesetround(FE_TONEAREST);
385 test(fma, 0x1.8000000000001p0, 0x1.8000000000001p0,
386 -0x1.0000000000001p-104, 0x1.2000000000001p+1,
387 ALL_STD_EXCEPT, FE_INEXACT);
388 fesetround(FE_DOWNWARD);
389 test(fma, 0x1.8000000000001p0, 0x1.8000000000001p0,
390 -0x1.0000000000001p-104, 0x1.2000000000001p+1,
391 ALL_STD_EXCEPT, FE_INEXACT);
392 fesetround(FE_UPWARD);
393 test(fma, 0x1.8000000000001p0, 0x1.8000000000001p0,
394 -0x1.0000000000001p-104, 0x1.2000000000002p+1,
395 ALL_STD_EXCEPT, FE_INEXACT);
397 fesetround(FE_TONEAREST);
398 test(fmaf, 0x1.800002p+0, 0x1.800002p+0, -0x1.000002p-46, 0x1.200002p+1,
399 ALL_STD_EXCEPT, FE_INEXACT);
400 fesetround(FE_DOWNWARD);
401 test(fmaf, 0x1.800002p+0, 0x1.800002p+0, -0x1.000002p-46, 0x1.200002p+1,
402 ALL_STD_EXCEPT, FE_INEXACT);
403 fesetround(FE_UPWARD);
404 test(fmaf, 0x1.800002p+0, 0x1.800002p+0, -0x1.000002p-46, 0x1.200004p+1,
405 ALL_STD_EXCEPT, FE_INEXACT);
407 fesetround(FE_TONEAREST);
408 #if LDBL_MANT_DIG == 64
409 test(fmal, 0x1.4p+0L, 0x1.0000000000000004p+0L, 0x1p-128L,
410 0x1.4000000000000006p+0L, ALL_STD_EXCEPT, FE_INEXACT);
411 #elif LDBL_MANT_DIG == 113
412 /* XXX untested test */
413 test(fmal, 0x1.4p+0L, 0x1.0000000000000000000000000002p+0L, 0x1p-224L,
414 0x1.4000000000000000000000000003p+0L, ALL_STD_EXCEPT, FE_INEXACT);
420 main(int argc, char *argv[])
422 int rmodes[] = { FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO };
427 #if defined(__i386__)
428 printf("1..0 # SKIP all testcases fail on i386\n");
433 for (i = 0; i < nitems(rmodes); i++, j++) {
434 printf("rmode = %d\n", rmodes[i]);
435 fesetround(rmodes[i]);
437 printf("ok %d - fma zeroes\n", j);
440 for (i = 0; i < nitems(rmodes); i++, j++) {
441 printf("rmode = %d\n", rmodes[i]);
442 fesetround(rmodes[i]);
444 printf("ok %d - fma infinities\n", j);
447 fesetround(FE_TONEAREST);
449 printf("ok %d - fma NaNs\n", j);
452 for (i = 0; i < nitems(rmodes); i++, j++) {
453 printf("rmode = %d\n", rmodes[i]);
454 fesetround(rmodes[i]);
456 printf("ok %d - fma small z\n", j);
459 for (i = 0; i < nitems(rmodes); i++, j++) {
460 printf("rmode = %d\n", rmodes[i]);
461 fesetround(rmodes[i]);
463 printf("ok %d - fma big z\n", j);
466 fesetround(FE_TONEAREST);
468 printf("ok %d - fma accuracy\n", j);
471 test_double_rounding();
472 printf("ok %d - fma double rounding\n", j);
477 * - Tests for subnormals
478 * - Cancellation tests (e.g., z = (double)x*y, but x*y is inexact)