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Andreas Färber8d725fa2011-03-07 01:34:04 +01001/*
2 * QEMU float support
3 *
4 * Derived from SoftFloat.
5 */
6
bellard158142c2005-03-13 16:54:06 +00007/*============================================================================
8
9This C header file is part of the SoftFloat IEC/IEEE Floating-point Arithmetic
10Package, Release 2b.
11
12Written by John R. Hauser. This work was made possible in part by the
13International Computer Science Institute, located at Suite 600, 1947 Center
14Street, Berkeley, California 94704. Funding was partially provided by the
15National Science Foundation under grant MIP-9311980. The original version
16of this code was written as part of a project to build a fixed-point vector
17processor in collaboration with the University of California at Berkeley,
18overseen by Profs. Nelson Morgan and John Wawrzynek. More information
19is available through the Web page `http://www.cs.berkeley.edu/~jhauser/
20arithmetic/SoftFloat.html'.
21
22THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has
23been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
24RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
25AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
26COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
27EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
28INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
29OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
30
31Derivative works are acceptable, even for commercial purposes, so long as
32(1) the source code for the derivative work includes prominent notice that
33the work is derivative, and (2) the source code includes prominent notice with
34these four paragraphs for those parts of this code that are retained.
35
36=============================================================================*/
37
38#ifndef SOFTFLOAT_H
39#define SOFTFLOAT_H
40
Juan Quintela75b5a692009-07-27 16:13:23 +020041#if defined(CONFIG_SOLARIS) && defined(CONFIG_NEEDS_LIBSUNMATH)
ths0475a5c2007-04-01 18:54:44 +000042#include <sunmath.h>
43#endif
44
bellard158142c2005-03-13 16:54:06 +000045#include <inttypes.h>
46#include "config.h"
47
48/*----------------------------------------------------------------------------
49| Each of the following `typedef's defines the most convenient type that holds
50| integers of at least as many bits as specified. For example, `uint8' should
51| be the most convenient type that can hold unsigned integers of as many as
52| 8 bits. The `flag' type must be able to hold either a 0 or 1. For most
53| implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
54| to the same as `int'.
55*----------------------------------------------------------------------------*/
bellard750afe92006-10-28 19:27:11 +000056typedef uint8_t flag;
bellard158142c2005-03-13 16:54:06 +000057typedef uint8_t uint8;
58typedef int8_t int8;
malcb29fe3e2008-11-18 01:42:22 +000059#ifndef _AIX
bellard158142c2005-03-13 16:54:06 +000060typedef int uint16;
61typedef int int16;
malcb29fe3e2008-11-18 01:42:22 +000062#endif
bellard158142c2005-03-13 16:54:06 +000063typedef unsigned int uint32;
64typedef signed int int32;
65typedef uint64_t uint64;
66typedef int64_t int64;
67
bellard158142c2005-03-13 16:54:06 +000068#define LIT64( a ) a##LL
69#define INLINE static inline
70
Guan Xuetaod2fbca92011-04-12 16:27:03 +080071#if defined(TARGET_MIPS) || defined(TARGET_SH4) || defined(TARGET_UNICORE32)
Christophe Lyon85596662011-02-21 17:38:44 +010072#define SNAN_BIT_IS_ONE 1
73#else
74#define SNAN_BIT_IS_ONE 0
75#endif
76
bellard158142c2005-03-13 16:54:06 +000077#define STATUS_PARAM , float_status *status
78#define STATUS(field) status->field
79#define STATUS_VAR , status
80
bellard1d6bda32005-03-13 18:52:29 +000081/*----------------------------------------------------------------------------
82| Software IEC/IEEE floating-point ordering relations
83*----------------------------------------------------------------------------*/
84enum {
85 float_relation_less = -1,
86 float_relation_equal = 0,
87 float_relation_greater = 1,
88 float_relation_unordered = 2
89};
90
bellard158142c2005-03-13 16:54:06 +000091/*----------------------------------------------------------------------------
92| Software IEC/IEEE floating-point types.
93*----------------------------------------------------------------------------*/
pbrookf090c9d2007-11-18 14:33:24 +000094/* Use structures for soft-float types. This prevents accidentally mixing
95 them with native int/float types. A sufficiently clever compiler and
96 sane ABI should be able to see though these structs. However
97 x86/gcc 3.x seems to struggle a bit, so leave them disabled by default. */
98//#define USE_SOFTFLOAT_STRUCT_TYPES
99#ifdef USE_SOFTFLOAT_STRUCT_TYPES
100typedef struct {
Peter Maydellbb4d4bb2011-02-10 11:28:56 +0000101 uint16_t v;
102} float16;
103#define float16_val(x) (((float16)(x)).v)
104#define make_float16(x) __extension__ ({ float16 f16_val = {x}; f16_val; })
Peter Maydelld5138cf2011-02-10 13:59:34 +0000105#define const_float16(x) { x }
Peter Maydellbb4d4bb2011-02-10 11:28:56 +0000106typedef struct {
pbrookf090c9d2007-11-18 14:33:24 +0000107 uint32_t v;
108} float32;
109/* The cast ensures an error if the wrong type is passed. */
110#define float32_val(x) (((float32)(x)).v)
111#define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; })
Peter Maydelld5138cf2011-02-10 13:59:34 +0000112#define const_float32(x) { x }
pbrookf090c9d2007-11-18 14:33:24 +0000113typedef struct {
114 uint64_t v;
115} float64;
116#define float64_val(x) (((float64)(x)).v)
117#define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; })
Peter Maydelld5138cf2011-02-10 13:59:34 +0000118#define const_float64(x) { x }
pbrookf090c9d2007-11-18 14:33:24 +0000119#else
Peter Maydellbb4d4bb2011-02-10 11:28:56 +0000120typedef uint16_t float16;
bellard158142c2005-03-13 16:54:06 +0000121typedef uint32_t float32;
122typedef uint64_t float64;
Peter Maydellbb4d4bb2011-02-10 11:28:56 +0000123#define float16_val(x) (x)
pbrookf090c9d2007-11-18 14:33:24 +0000124#define float32_val(x) (x)
125#define float64_val(x) (x)
Peter Maydellbb4d4bb2011-02-10 11:28:56 +0000126#define make_float16(x) (x)
pbrookf090c9d2007-11-18 14:33:24 +0000127#define make_float32(x) (x)
128#define make_float64(x) (x)
Peter Maydelld5138cf2011-02-10 13:59:34 +0000129#define const_float16(x) (x)
130#define const_float32(x) (x)
131#define const_float64(x) (x)
pbrookf090c9d2007-11-18 14:33:24 +0000132#endif
bellard158142c2005-03-13 16:54:06 +0000133typedef struct {
134 uint64_t low;
135 uint16_t high;
136} floatx80;
Aurelien Jarnof3218a82011-04-20 13:04:22 +0200137#define make_floatx80(exp, mant) ((floatx80) { mant, exp })
bellard158142c2005-03-13 16:54:06 +0000138typedef struct {
Juan Quintelae2542fe2009-07-27 16:13:06 +0200139#ifdef HOST_WORDS_BIGENDIAN
bellard158142c2005-03-13 16:54:06 +0000140 uint64_t high, low;
141#else
142 uint64_t low, high;
143#endif
144} float128;
bellard158142c2005-03-13 16:54:06 +0000145
146/*----------------------------------------------------------------------------
147| Software IEC/IEEE floating-point underflow tininess-detection mode.
148*----------------------------------------------------------------------------*/
149enum {
150 float_tininess_after_rounding = 0,
151 float_tininess_before_rounding = 1
152};
153
154/*----------------------------------------------------------------------------
155| Software IEC/IEEE floating-point rounding mode.
156*----------------------------------------------------------------------------*/
157enum {
158 float_round_nearest_even = 0,
159 float_round_down = 1,
160 float_round_up = 2,
161 float_round_to_zero = 3
162};
163
164/*----------------------------------------------------------------------------
165| Software IEC/IEEE floating-point exception flags.
166*----------------------------------------------------------------------------*/
167enum {
168 float_flag_invalid = 1,
169 float_flag_divbyzero = 4,
170 float_flag_overflow = 8,
171 float_flag_underflow = 16,
Peter Maydell37d18662011-01-06 19:37:53 +0000172 float_flag_inexact = 32,
Peter Maydelle6afc872011-05-19 14:46:17 +0100173 float_flag_input_denormal = 64,
174 float_flag_output_denormal = 128
bellard158142c2005-03-13 16:54:06 +0000175};
176
177typedef struct float_status {
178 signed char float_detect_tininess;
179 signed char float_rounding_mode;
180 signed char float_exception_flags;
bellard158142c2005-03-13 16:54:06 +0000181 signed char floatx80_rounding_precision;
Peter Maydell37d18662011-01-06 19:37:53 +0000182 /* should denormalised results go to zero and set the inexact flag? */
pbrookfe76d972008-12-19 14:33:59 +0000183 flag flush_to_zero;
Peter Maydell37d18662011-01-06 19:37:53 +0000184 /* should denormalised inputs go to zero and set the input_denormal flag? */
185 flag flush_inputs_to_zero;
pbrook5c7908e2008-12-19 13:53:37 +0000186 flag default_nan_mode;
bellard158142c2005-03-13 16:54:06 +0000187} float_status;
188
189void set_float_rounding_mode(int val STATUS_PARAM);
bellard1d6bda32005-03-13 18:52:29 +0000190void set_float_exception_flags(int val STATUS_PARAM);
Peter Maydellc29aca42011-04-12 13:56:40 +0100191INLINE void set_float_detect_tininess(int val STATUS_PARAM)
192{
193 STATUS(float_detect_tininess) = val;
194}
pbrookfe76d972008-12-19 14:33:59 +0000195INLINE void set_flush_to_zero(flag val STATUS_PARAM)
196{
197 STATUS(flush_to_zero) = val;
198}
Peter Maydell37d18662011-01-06 19:37:53 +0000199INLINE void set_flush_inputs_to_zero(flag val STATUS_PARAM)
200{
201 STATUS(flush_inputs_to_zero) = val;
202}
pbrook5c7908e2008-12-19 13:53:37 +0000203INLINE void set_default_nan_mode(flag val STATUS_PARAM)
204{
205 STATUS(default_nan_mode) = val;
206}
bellard1d6bda32005-03-13 18:52:29 +0000207INLINE int get_float_exception_flags(float_status *status)
208{
209 return STATUS(float_exception_flags);
210}
bellard158142c2005-03-13 16:54:06 +0000211void set_floatx80_rounding_precision(int val STATUS_PARAM);
bellard158142c2005-03-13 16:54:06 +0000212
213/*----------------------------------------------------------------------------
214| Routine to raise any or all of the software IEC/IEEE floating-point
215| exception flags.
216*----------------------------------------------------------------------------*/
bellardec530c82006-04-25 22:36:06 +0000217void float_raise( int8 flags STATUS_PARAM);
bellard158142c2005-03-13 16:54:06 +0000218
219/*----------------------------------------------------------------------------
220| Software IEC/IEEE integer-to-floating-point conversion routines.
221*----------------------------------------------------------------------------*/
Andreas Färber87b8cc32011-03-07 01:34:05 +0100222float32 int32_to_float32( int32 STATUS_PARAM );
223float64 int32_to_float64( int32 STATUS_PARAM );
bellard1d6bda32005-03-13 18:52:29 +0000224float32 uint32_to_float32( unsigned int STATUS_PARAM );
225float64 uint32_to_float64( unsigned int STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100226floatx80 int32_to_floatx80( int32 STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100227float128 int32_to_float128( int32 STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100228float32 int64_to_float32( int64 STATUS_PARAM );
229float32 uint64_to_float32( uint64 STATUS_PARAM );
230float64 int64_to_float64( int64 STATUS_PARAM );
231float64 uint64_to_float64( uint64 STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100232floatx80 int64_to_floatx80( int64 STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100233float128 int64_to_float128( int64 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000234
235/*----------------------------------------------------------------------------
Paul Brook60011492009-11-19 16:45:20 +0000236| Software half-precision conversion routines.
237*----------------------------------------------------------------------------*/
Peter Maydellbb4d4bb2011-02-10 11:28:56 +0000238float16 float32_to_float16( float32, flag STATUS_PARAM );
239float32 float16_to_float32( float16, flag STATUS_PARAM );
240
241/*----------------------------------------------------------------------------
242| Software half-precision operations.
243*----------------------------------------------------------------------------*/
244int float16_is_quiet_nan( float16 );
245int float16_is_signaling_nan( float16 );
246float16 float16_maybe_silence_nan( float16 );
Paul Brook60011492009-11-19 16:45:20 +0000247
248/*----------------------------------------------------------------------------
Christophe Lyon85596662011-02-21 17:38:44 +0100249| The pattern for a default generated half-precision NaN.
250*----------------------------------------------------------------------------*/
251#if defined(TARGET_ARM)
252#define float16_default_nan make_float16(0x7E00)
253#elif SNAN_BIT_IS_ONE
254#define float16_default_nan make_float16(0x7DFF)
255#else
256#define float16_default_nan make_float16(0xFE00)
257#endif
258
259/*----------------------------------------------------------------------------
bellard158142c2005-03-13 16:54:06 +0000260| Software IEC/IEEE single-precision conversion routines.
261*----------------------------------------------------------------------------*/
Andreas Färber87b8cc32011-03-07 01:34:05 +0100262int16 float32_to_int16_round_to_zero( float32 STATUS_PARAM );
Peter Maydellcbcef452010-12-07 15:37:34 +0000263unsigned int float32_to_uint16_round_to_zero( float32 STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100264int32 float32_to_int32( float32 STATUS_PARAM );
265int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM );
266uint32 float32_to_uint32( float32 STATUS_PARAM );
267uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
268int64 float32_to_int64( float32 STATUS_PARAM );
269int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000270float64 float32_to_float64( float32 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000271floatx80 float32_to_floatx80( float32 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000272float128 float32_to_float128( float32 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000273
274/*----------------------------------------------------------------------------
275| Software IEC/IEEE single-precision operations.
276*----------------------------------------------------------------------------*/
277float32 float32_round_to_int( float32 STATUS_PARAM );
278float32 float32_add( float32, float32 STATUS_PARAM );
279float32 float32_sub( float32, float32 STATUS_PARAM );
280float32 float32_mul( float32, float32 STATUS_PARAM );
281float32 float32_div( float32, float32 STATUS_PARAM );
282float32 float32_rem( float32, float32 STATUS_PARAM );
283float32 float32_sqrt( float32 STATUS_PARAM );
Aurelien Jarno8229c992009-02-05 12:04:05 +0100284float32 float32_exp2( float32 STATUS_PARAM );
aurel32374dfc32009-02-05 13:42:47 +0000285float32 float32_log2( float32 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200286int float32_eq( float32, float32 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000287int float32_le( float32, float32 STATUS_PARAM );
288int float32_lt( float32, float32 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200289int float32_unordered( float32, float32 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200290int float32_eq_quiet( float32, float32 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000291int float32_le_quiet( float32, float32 STATUS_PARAM );
292int float32_lt_quiet( float32, float32 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200293int float32_unordered_quiet( float32, float32 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000294int float32_compare( float32, float32 STATUS_PARAM );
295int float32_compare_quiet( float32, float32 STATUS_PARAM );
Peter Maydell274f1b02011-03-11 08:12:25 +0000296float32 float32_min(float32, float32 STATUS_PARAM);
297float32 float32_max(float32, float32 STATUS_PARAM);
Peter Maydell18569872010-12-17 15:56:06 +0000298int float32_is_quiet_nan( float32 );
bellard750afe92006-10-28 19:27:11 +0000299int float32_is_signaling_nan( float32 );
Peter Maydellb408dbd2010-12-07 15:37:34 +0000300float32 float32_maybe_silence_nan( float32 );
pbrook9ee6e8b2007-11-11 00:04:49 +0000301float32 float32_scalbn( float32, int STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000302
bellard1d6bda32005-03-13 18:52:29 +0000303INLINE float32 float32_abs(float32 a)
304{
Peter Maydell37d18662011-01-06 19:37:53 +0000305 /* Note that abs does *not* handle NaN specially, nor does
306 * it flush denormal inputs to zero.
307 */
pbrookf090c9d2007-11-18 14:33:24 +0000308 return make_float32(float32_val(a) & 0x7fffffff);
bellard1d6bda32005-03-13 18:52:29 +0000309}
310
311INLINE float32 float32_chs(float32 a)
312{
Peter Maydell37d18662011-01-06 19:37:53 +0000313 /* Note that chs does *not* handle NaN specially, nor does
314 * it flush denormal inputs to zero.
315 */
pbrookf090c9d2007-11-18 14:33:24 +0000316 return make_float32(float32_val(a) ^ 0x80000000);
bellard1d6bda32005-03-13 18:52:29 +0000317}
318
aurel32c52ab6f2008-12-15 17:14:20 +0000319INLINE int float32_is_infinity(float32 a)
320{
aurel32dadd71a2008-12-18 22:43:16 +0000321 return (float32_val(a) & 0x7fffffff) == 0x7f800000;
aurel32c52ab6f2008-12-15 17:14:20 +0000322}
323
324INLINE int float32_is_neg(float32 a)
325{
326 return float32_val(a) >> 31;
327}
328
329INLINE int float32_is_zero(float32 a)
330{
331 return (float32_val(a) & 0x7fffffff) == 0;
332}
333
Peter Maydell21d6ebd2010-12-07 15:37:34 +0000334INLINE int float32_is_any_nan(float32 a)
335{
336 return ((float32_val(a) & ~(1 << 31)) > 0x7f800000UL);
337}
338
Peter Maydell6f3300a2011-01-14 20:39:18 +0100339INLINE int float32_is_zero_or_denormal(float32 a)
340{
341 return (float32_val(a) & 0x7f800000) == 0;
342}
343
Christophe Lyonc30fe7d2011-02-21 17:38:45 +0100344INLINE float32 float32_set_sign(float32 a, int sign)
345{
346 return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
347}
348
pbrookf090c9d2007-11-18 14:33:24 +0000349#define float32_zero make_float32(0)
aurel32196cfc82009-02-04 13:52:27 +0000350#define float32_one make_float32(0x3f800000)
Aurelien Jarno8229c992009-02-05 12:04:05 +0100351#define float32_ln2 make_float32(0x3f317218)
Aurelien Jarnoc4b4c772011-04-20 13:04:22 +0200352#define float32_pi make_float32(0x40490fdb)
Christophe Lyonc30fe7d2011-02-21 17:38:45 +0100353#define float32_half make_float32(0x3f000000)
354#define float32_infinity make_float32(0x7f800000)
pbrookf090c9d2007-11-18 14:33:24 +0000355
Christophe Lyon85596662011-02-21 17:38:44 +0100356
357/*----------------------------------------------------------------------------
358| The pattern for a default generated single-precision NaN.
359*----------------------------------------------------------------------------*/
360#if defined(TARGET_SPARC)
361#define float32_default_nan make_float32(0x7FFFFFFF)
362#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
363#define float32_default_nan make_float32(0x7FC00000)
364#elif SNAN_BIT_IS_ONE
365#define float32_default_nan make_float32(0x7FBFFFFF)
366#else
367#define float32_default_nan make_float32(0xFFC00000)
368#endif
369
bellard158142c2005-03-13 16:54:06 +0000370/*----------------------------------------------------------------------------
371| Software IEC/IEEE double-precision conversion routines.
372*----------------------------------------------------------------------------*/
Andreas Färber87b8cc32011-03-07 01:34:05 +0100373int16 float64_to_int16_round_to_zero( float64 STATUS_PARAM );
Peter Maydellcbcef452010-12-07 15:37:34 +0000374unsigned int float64_to_uint16_round_to_zero( float64 STATUS_PARAM );
Andreas Färber87b8cc32011-03-07 01:34:05 +0100375int32 float64_to_int32( float64 STATUS_PARAM );
376int32 float64_to_int32_round_to_zero( float64 STATUS_PARAM );
377uint32 float64_to_uint32( float64 STATUS_PARAM );
378uint32 float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
379int64 float64_to_int64( float64 STATUS_PARAM );
380int64 float64_to_int64_round_to_zero( float64 STATUS_PARAM );
381uint64 float64_to_uint64 (float64 a STATUS_PARAM);
382uint64 float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
bellard158142c2005-03-13 16:54:06 +0000383float32 float64_to_float32( float64 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000384floatx80 float64_to_floatx80( float64 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000385float128 float64_to_float128( float64 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000386
387/*----------------------------------------------------------------------------
388| Software IEC/IEEE double-precision operations.
389*----------------------------------------------------------------------------*/
390float64 float64_round_to_int( float64 STATUS_PARAM );
pbrooke6e59062006-10-22 00:18:54 +0000391float64 float64_trunc_to_int( float64 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000392float64 float64_add( float64, float64 STATUS_PARAM );
393float64 float64_sub( float64, float64 STATUS_PARAM );
394float64 float64_mul( float64, float64 STATUS_PARAM );
395float64 float64_div( float64, float64 STATUS_PARAM );
396float64 float64_rem( float64, float64 STATUS_PARAM );
397float64 float64_sqrt( float64 STATUS_PARAM );
aurel32374dfc32009-02-05 13:42:47 +0000398float64 float64_log2( float64 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200399int float64_eq( float64, float64 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000400int float64_le( float64, float64 STATUS_PARAM );
401int float64_lt( float64, float64 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200402int float64_unordered( float64, float64 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200403int float64_eq_quiet( float64, float64 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000404int float64_le_quiet( float64, float64 STATUS_PARAM );
405int float64_lt_quiet( float64, float64 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200406int float64_unordered_quiet( float64, float64 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000407int float64_compare( float64, float64 STATUS_PARAM );
408int float64_compare_quiet( float64, float64 STATUS_PARAM );
Peter Maydell274f1b02011-03-11 08:12:25 +0000409float64 float64_min(float64, float64 STATUS_PARAM);
410float64 float64_max(float64, float64 STATUS_PARAM);
Peter Maydell18569872010-12-17 15:56:06 +0000411int float64_is_quiet_nan( float64 a );
bellard750afe92006-10-28 19:27:11 +0000412int float64_is_signaling_nan( float64 );
Peter Maydellb408dbd2010-12-07 15:37:34 +0000413float64 float64_maybe_silence_nan( float64 );
pbrook9ee6e8b2007-11-11 00:04:49 +0000414float64 float64_scalbn( float64, int STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000415
bellard1d6bda32005-03-13 18:52:29 +0000416INLINE float64 float64_abs(float64 a)
417{
Peter Maydell37d18662011-01-06 19:37:53 +0000418 /* Note that abs does *not* handle NaN specially, nor does
419 * it flush denormal inputs to zero.
420 */
pbrookf090c9d2007-11-18 14:33:24 +0000421 return make_float64(float64_val(a) & 0x7fffffffffffffffLL);
bellard1d6bda32005-03-13 18:52:29 +0000422}
423
424INLINE float64 float64_chs(float64 a)
425{
Peter Maydell37d18662011-01-06 19:37:53 +0000426 /* Note that chs does *not* handle NaN specially, nor does
427 * it flush denormal inputs to zero.
428 */
pbrookf090c9d2007-11-18 14:33:24 +0000429 return make_float64(float64_val(a) ^ 0x8000000000000000LL);
bellard1d6bda32005-03-13 18:52:29 +0000430}
431
aurel32c52ab6f2008-12-15 17:14:20 +0000432INLINE int float64_is_infinity(float64 a)
433{
434 return (float64_val(a) & 0x7fffffffffffffffLL ) == 0x7ff0000000000000LL;
435}
436
437INLINE int float64_is_neg(float64 a)
438{
439 return float64_val(a) >> 63;
440}
441
442INLINE int float64_is_zero(float64 a)
443{
444 return (float64_val(a) & 0x7fffffffffffffffLL) == 0;
445}
446
Peter Maydell21d6ebd2010-12-07 15:37:34 +0000447INLINE int float64_is_any_nan(float64 a)
448{
449 return ((float64_val(a) & ~(1ULL << 63)) > 0x7ff0000000000000ULL);
450}
451
Aurelien Jarno587eabf2011-05-15 14:09:18 +0200452INLINE int float64_is_zero_or_denormal(float64 a)
453{
454 return (float64_val(a) & 0x7ff0000000000000LL) == 0;
455}
456
Christophe Lyonc30fe7d2011-02-21 17:38:45 +0100457INLINE float64 float64_set_sign(float64 a, int sign)
458{
459 return make_float64((float64_val(a) & 0x7fffffffffffffffULL)
460 | ((int64_t)sign << 63));
461}
462
pbrookf090c9d2007-11-18 14:33:24 +0000463#define float64_zero make_float64(0)
aurel32196cfc82009-02-04 13:52:27 +0000464#define float64_one make_float64(0x3ff0000000000000LL)
Aurelien Jarno8229c992009-02-05 12:04:05 +0100465#define float64_ln2 make_float64(0x3fe62e42fefa39efLL)
Aurelien Jarnoc4b4c772011-04-20 13:04:22 +0200466#define float64_pi make_float64(0x400921fb54442d18LL)
Christophe Lyonc30fe7d2011-02-21 17:38:45 +0100467#define float64_half make_float64(0x3fe0000000000000LL)
468#define float64_infinity make_float64(0x7ff0000000000000LL)
pbrookf090c9d2007-11-18 14:33:24 +0000469
Christophe Lyon85596662011-02-21 17:38:44 +0100470/*----------------------------------------------------------------------------
471| The pattern for a default generated double-precision NaN.
472*----------------------------------------------------------------------------*/
473#if defined(TARGET_SPARC)
474#define float64_default_nan make_float64(LIT64( 0x7FFFFFFFFFFFFFFF ))
475#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA)
476#define float64_default_nan make_float64(LIT64( 0x7FF8000000000000 ))
477#elif SNAN_BIT_IS_ONE
478#define float64_default_nan make_float64(LIT64( 0x7FF7FFFFFFFFFFFF ))
479#else
480#define float64_default_nan make_float64(LIT64( 0xFFF8000000000000 ))
481#endif
482
bellard158142c2005-03-13 16:54:06 +0000483/*----------------------------------------------------------------------------
484| Software IEC/IEEE extended double-precision conversion routines.
485*----------------------------------------------------------------------------*/
Andreas Färber87b8cc32011-03-07 01:34:05 +0100486int32 floatx80_to_int32( floatx80 STATUS_PARAM );
487int32 floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
488int64 floatx80_to_int64( floatx80 STATUS_PARAM );
489int64 floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000490float32 floatx80_to_float32( floatx80 STATUS_PARAM );
491float64 floatx80_to_float64( floatx80 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000492float128 floatx80_to_float128( floatx80 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000493
494/*----------------------------------------------------------------------------
495| Software IEC/IEEE extended double-precision operations.
496*----------------------------------------------------------------------------*/
497floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
498floatx80 floatx80_add( floatx80, floatx80 STATUS_PARAM );
499floatx80 floatx80_sub( floatx80, floatx80 STATUS_PARAM );
500floatx80 floatx80_mul( floatx80, floatx80 STATUS_PARAM );
501floatx80 floatx80_div( floatx80, floatx80 STATUS_PARAM );
502floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
503floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200504int floatx80_eq( floatx80, floatx80 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000505int floatx80_le( floatx80, floatx80 STATUS_PARAM );
506int floatx80_lt( floatx80, floatx80 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200507int floatx80_unordered( floatx80, floatx80 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200508int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000509int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
510int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200511int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM );
Aurelien Jarnof6714d32011-04-20 13:04:22 +0200512int floatx80_compare( floatx80, floatx80 STATUS_PARAM );
513int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM );
Peter Maydell18569872010-12-17 15:56:06 +0000514int floatx80_is_quiet_nan( floatx80 );
bellard750afe92006-10-28 19:27:11 +0000515int floatx80_is_signaling_nan( floatx80 );
Aurelien Jarnof6a7d922011-01-06 15:38:19 +0100516floatx80 floatx80_maybe_silence_nan( floatx80 );
pbrook9ee6e8b2007-11-11 00:04:49 +0000517floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000518
bellard1d6bda32005-03-13 18:52:29 +0000519INLINE floatx80 floatx80_abs(floatx80 a)
520{
521 a.high &= 0x7fff;
522 return a;
523}
524
525INLINE floatx80 floatx80_chs(floatx80 a)
526{
527 a.high ^= 0x8000;
528 return a;
529}
530
aurel32c52ab6f2008-12-15 17:14:20 +0000531INLINE int floatx80_is_infinity(floatx80 a)
532{
Aurelien Jarnob76235e2011-04-20 13:04:22 +0200533 return (a.high & 0x7fff) == 0x7fff && a.low == 0x8000000000000000LL;
aurel32c52ab6f2008-12-15 17:14:20 +0000534}
535
536INLINE int floatx80_is_neg(floatx80 a)
537{
538 return a.high >> 15;
539}
540
541INLINE int floatx80_is_zero(floatx80 a)
542{
543 return (a.high & 0x7fff) == 0 && a.low == 0;
544}
545
Aurelien Jarno587eabf2011-05-15 14:09:18 +0200546INLINE int floatx80_is_zero_or_denormal(floatx80 a)
547{
548 return (a.high & 0x7fff) == 0;
549}
550
Peter Maydell2bed6522011-01-06 18:34:43 +0000551INLINE int floatx80_is_any_nan(floatx80 a)
552{
553 return ((a.high & 0x7fff) == 0x7fff) && (a.low<<1);
554}
555
Aurelien Jarnof3218a82011-04-20 13:04:22 +0200556#define floatx80_zero make_floatx80(0x0000, 0x0000000000000000LL)
557#define floatx80_one make_floatx80(0x3fff, 0x8000000000000000LL)
558#define floatx80_ln2 make_floatx80(0x3ffe, 0xb17217f7d1cf79acLL)
Aurelien Jarnoc4b4c772011-04-20 13:04:22 +0200559#define floatx80_pi make_floatx80(0x4000, 0xc90fdaa22168c235LL)
Aurelien Jarnof3218a82011-04-20 13:04:22 +0200560#define floatx80_half make_floatx80(0x3ffe, 0x8000000000000000LL)
561#define floatx80_infinity make_floatx80(0x7fff, 0x8000000000000000LL)
562
Christophe Lyon85596662011-02-21 17:38:44 +0100563/*----------------------------------------------------------------------------
564| The pattern for a default generated extended double-precision NaN. The
565| `high' and `low' values hold the most- and least-significant bits,
566| respectively.
567*----------------------------------------------------------------------------*/
568#if SNAN_BIT_IS_ONE
569#define floatx80_default_nan_high 0x7FFF
570#define floatx80_default_nan_low LIT64( 0xBFFFFFFFFFFFFFFF )
571#else
572#define floatx80_default_nan_high 0xFFFF
573#define floatx80_default_nan_low LIT64( 0xC000000000000000 )
574#endif
575
bellard158142c2005-03-13 16:54:06 +0000576/*----------------------------------------------------------------------------
577| Software IEC/IEEE quadruple-precision conversion routines.
578*----------------------------------------------------------------------------*/
Andreas Färber87b8cc32011-03-07 01:34:05 +0100579int32 float128_to_int32( float128 STATUS_PARAM );
580int32 float128_to_int32_round_to_zero( float128 STATUS_PARAM );
581int64 float128_to_int64( float128 STATUS_PARAM );
582int64 float128_to_int64_round_to_zero( float128 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000583float32 float128_to_float32( float128 STATUS_PARAM );
584float64 float128_to_float64( float128 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000585floatx80 float128_to_floatx80( float128 STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000586
587/*----------------------------------------------------------------------------
588| Software IEC/IEEE quadruple-precision operations.
589*----------------------------------------------------------------------------*/
590float128 float128_round_to_int( float128 STATUS_PARAM );
591float128 float128_add( float128, float128 STATUS_PARAM );
592float128 float128_sub( float128, float128 STATUS_PARAM );
593float128 float128_mul( float128, float128 STATUS_PARAM );
594float128 float128_div( float128, float128 STATUS_PARAM );
595float128 float128_rem( float128, float128 STATUS_PARAM );
596float128 float128_sqrt( float128 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200597int float128_eq( float128, float128 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000598int float128_le( float128, float128 STATUS_PARAM );
599int float128_lt( float128, float128 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200600int float128_unordered( float128, float128 STATUS_PARAM );
Aurelien Jarnob6893622011-04-14 00:49:29 +0200601int float128_eq_quiet( float128, float128 STATUS_PARAM );
bellard750afe92006-10-28 19:27:11 +0000602int float128_le_quiet( float128, float128 STATUS_PARAM );
603int float128_lt_quiet( float128, float128 STATUS_PARAM );
Aurelien Jarno67b78612011-04-14 00:49:29 +0200604int float128_unordered_quiet( float128, float128 STATUS_PARAM );
blueswir11f587322007-11-25 18:40:20 +0000605int float128_compare( float128, float128 STATUS_PARAM );
606int float128_compare_quiet( float128, float128 STATUS_PARAM );
Peter Maydell18569872010-12-17 15:56:06 +0000607int float128_is_quiet_nan( float128 );
bellard750afe92006-10-28 19:27:11 +0000608int float128_is_signaling_nan( float128 );
Aurelien Jarnof6a7d922011-01-06 15:38:19 +0100609float128 float128_maybe_silence_nan( float128 );
pbrook9ee6e8b2007-11-11 00:04:49 +0000610float128 float128_scalbn( float128, int STATUS_PARAM );
bellard158142c2005-03-13 16:54:06 +0000611
bellard1d6bda32005-03-13 18:52:29 +0000612INLINE float128 float128_abs(float128 a)
613{
614 a.high &= 0x7fffffffffffffffLL;
615 return a;
616}
617
618INLINE float128 float128_chs(float128 a)
619{
620 a.high ^= 0x8000000000000000LL;
621 return a;
622}
623
aurel32c52ab6f2008-12-15 17:14:20 +0000624INLINE int float128_is_infinity(float128 a)
625{
626 return (a.high & 0x7fffffffffffffffLL) == 0x7fff000000000000LL && a.low == 0;
627}
628
629INLINE int float128_is_neg(float128 a)
630{
631 return a.high >> 63;
632}
633
634INLINE int float128_is_zero(float128 a)
635{
636 return (a.high & 0x7fffffffffffffffLL) == 0 && a.low == 0;
637}
638
Aurelien Jarno587eabf2011-05-15 14:09:18 +0200639INLINE int float128_is_zero_or_denormal(float128 a)
640{
641 return (a.high & 0x7fff000000000000LL) == 0;
642}
643
Peter Maydell2bed6522011-01-06 18:34:43 +0000644INLINE int float128_is_any_nan(float128 a)
645{
646 return ((a.high >> 48) & 0x7fff) == 0x7fff &&
647 ((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
648}
649
Christophe Lyon85596662011-02-21 17:38:44 +0100650/*----------------------------------------------------------------------------
651| The pattern for a default generated quadruple-precision NaN. The `high' and
652| `low' values hold the most- and least-significant bits, respectively.
653*----------------------------------------------------------------------------*/
654#if SNAN_BIT_IS_ONE
655#define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF )
656#define float128_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF )
657#else
658#define float128_default_nan_high LIT64( 0xFFFF800000000000 )
659#define float128_default_nan_low LIT64( 0x0000000000000000 )
660#endif
661
bellard158142c2005-03-13 16:54:06 +0000662#endif /* !SOFTFLOAT_H */