gwj / at91sam9263 · Commits

Commit 1d6bda356153c82e100680d9f2165e32c8fb1330

Authored by bellard
1 parent 53cd6637

added abs, chs and compare functions 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1338 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 2 changed files with 204 additions and 0 deletions
fpu/softfloat.c
  View file @1d6bda3
... ... @@ -54,6 +54,11 @@ void set_float_rounding_mode(int val STATUS_PARAM)
54 54 STATUS(float_rounding_mode) = val;
55 55 }
56 56  
  57 +void set_float_exception_flags(int val STATUS_PARAM)
  58 +{
  59 + STATUS(float_exception_flags) = val;
  60 +}
  61 +
57 62 #ifdef FLOATX80
58 63 void set_floatx80_rounding_precision(int val STATUS_PARAM)
59 64 {
... ... @@ -5183,3 +5188,133 @@ flag float128_lt_quiet( float128 a, float128 b STATUS_PARAM )
5183 5188  
5184 5189 #endif
5185 5190  
  5191 +/* misc functions */
  5192 +float32 uint32_to_float32( unsigned int a STATUS_PARAM )
  5193 +{
  5194 + return int64_to_float32(a STATUS_VAR);
  5195 +}
  5196 +
  5197 +float64 uint32_to_float64( unsigned int a STATUS_PARAM )
  5198 +{
  5199 + return int64_to_float64(a STATUS_VAR);
  5200 +}
  5201 +
  5202 +unsigned int float32_to_uint32( float32 a STATUS_PARAM )
  5203 +{
  5204 + int64_t v;
  5205 + unsigned int res;
  5206 +
  5207 + v = float32_to_int64(a STATUS_VAR);
  5208 + if (v < 0) {
  5209 + res = 0;
  5210 + float_raise( float_flag_invalid STATUS_VAR);
  5211 + } else if (v > 0xffffffff) {
  5212 + res = 0xffffffff;
  5213 + float_raise( float_flag_invalid STATUS_VAR);
  5214 + } else {
  5215 + res = v;
  5216 + }
  5217 + return res;
  5218 +}
  5219 +
  5220 +unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM )
  5221 +{
  5222 + int64_t v;
  5223 + unsigned int res;
  5224 +
  5225 + v = float32_to_int64_round_to_zero(a STATUS_VAR);
  5226 + if (v < 0) {
  5227 + res = 0;
  5228 + float_raise( float_flag_invalid STATUS_VAR);
  5229 + } else if (v > 0xffffffff) {
  5230 + res = 0xffffffff;
  5231 + float_raise( float_flag_invalid STATUS_VAR);
  5232 + } else {
  5233 + res = v;
  5234 + }
  5235 + return res;
  5236 +}
  5237 +
  5238 +unsigned int float64_to_uint32( float64 a STATUS_PARAM )
  5239 +{
  5240 + int64_t v;
  5241 + unsigned int res;
  5242 +
  5243 + v = float64_to_int64(a STATUS_VAR);
  5244 + if (v < 0) {
  5245 + res = 0;
  5246 + float_raise( float_flag_invalid STATUS_VAR);
  5247 + } else if (v > 0xffffffff) {
  5248 + res = 0xffffffff;
  5249 + float_raise( float_flag_invalid STATUS_VAR);
  5250 + } else {
  5251 + res = v;
  5252 + }
  5253 + return res;
  5254 +}
  5255 +
  5256 +unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM )
  5257 +{
  5258 + int64_t v;
  5259 + unsigned int res;
  5260 +
  5261 + v = float64_to_int64_round_to_zero(a STATUS_VAR);
  5262 + if (v < 0) {
  5263 + res = 0;
  5264 + float_raise( float_flag_invalid STATUS_VAR);
  5265 + } else if (v > 0xffffffff) {
  5266 + res = 0xffffffff;
  5267 + float_raise( float_flag_invalid STATUS_VAR);
  5268 + } else {
  5269 + res = v;
  5270 + }
  5271 + return res;
  5272 +}
  5273 +
  5274 +#define COMPARE(s, nan_exp) \
  5275 +INLINE char float ## s ## _compare_internal( float ## s a, float ## s b, \
  5276 + int is_quiet STATUS_PARAM ) \
  5277 +{ \
  5278 + flag aSign, bSign; \
  5279 + \
  5280 + if (( ( extractFloat ## s ## Exp( a ) == nan_exp ) && \
  5281 + extractFloat ## s ## Frac( a ) ) || \
  5282 + ( ( extractFloat ## s ## Exp( b ) == nan_exp ) && \
  5283 + extractFloat ## s ## Frac( b ) )) { \
  5284 + if (!is_quiet || \
  5285 + float ## s ## _is_signaling_nan( a ) || \
  5286 + float ## s ## _is_signaling_nan( b ) ) { \
  5287 + float_raise( float_flag_invalid STATUS_VAR); \
  5288 + } \
  5289 + return float_relation_unordered; \
  5290 + } \
  5291 + aSign = extractFloat ## s ## Sign( a ); \
  5292 + bSign = extractFloat ## s ## Sign( b ); \
  5293 + if ( aSign != bSign ) { \
  5294 + if ( (bits ## s) ( ( a | b )<<1 ) == 0 ) { \
  5295 + /* zero case */ \
  5296 + return float_relation_equal; \
  5297 + } else { \
  5298 + return 1 - (2 * aSign); \
  5299 + } \
  5300 + } else { \
  5301 + if (a == b) { \
  5302 + return float_relation_equal; \
  5303 + } else { \
  5304 + return 1 - 2 * (aSign ^ ( a < b )); \
  5305 + } \
  5306 + } \
  5307 +} \
  5308 + \
  5309 +char float ## s ## _compare( float ## s a, float ## s b STATUS_PARAM ) \
  5310 +{ \
  5311 + return float ## s ## _compare_internal(a, b, 0 STATUS_VAR); \
  5312 +} \
  5313 + \
  5314 +char float ## s ## _compare_quiet( float ## s a, float ## s b STATUS_PARAM ) \
  5315 +{ \
  5316 + return float ## s ## _compare_internal(a, b, 1 STATUS_VAR); \
  5317 +}
  5318 +
  5319 +COMPARE(32, 0xff)
  5320 +COMPARE(64, 0x7ff)
... ...
fpu/softfloat.h
  View file @1d6bda3
... ... @@ -93,6 +93,16 @@ typedef int64_t sbits64;
93 93 #define STATUS(field) status->field
94 94 #define STATUS_VAR , status
95 95  
  96 +/*----------------------------------------------------------------------------
  97 +| Software IEC/IEEE floating-point ordering relations
  98 +*----------------------------------------------------------------------------*/
  99 +enum {
  100 + float_relation_less = -1,
  101 + float_relation_equal = 0,
  102 + float_relation_greater = 1,
  103 + float_relation_unordered = 2
  104 +};
  105 +
96 106 #ifdef CONFIG_SOFTFLOAT
97 107 /*----------------------------------------------------------------------------
98 108 | Software IEC/IEEE floating-point types.
... ... @@ -154,6 +164,11 @@ typedef struct float_status {
154 164 } float_status;
155 165  
156 166 void set_float_rounding_mode(int val STATUS_PARAM);
  167 +void set_float_exception_flags(int val STATUS_PARAM);
  168 +INLINE int get_float_exception_flags(float_status *status)
  169 +{
  170 + return STATUS(float_exception_flags);
  171 +}
157 172 #ifdef FLOATX80
158 173 void set_floatx80_rounding_precision(int val STATUS_PARAM);
159 174 #endif
... ... @@ -169,6 +184,8 @@ void float_raise( signed char STATUS_PARAM);
169 184 *----------------------------------------------------------------------------*/
170 185 float32 int32_to_float32( int STATUS_PARAM );
171 186 float64 int32_to_float64( int STATUS_PARAM );
  187 +float32 uint32_to_float32( unsigned int STATUS_PARAM );
  188 +float64 uint32_to_float64( unsigned int STATUS_PARAM );
172 189 #ifdef FLOATX80
173 190 floatx80 int32_to_floatx80( int STATUS_PARAM );
174 191 #endif
... ... @@ -189,6 +206,8 @@ float128 int64_to_float128( int64_t STATUS_PARAM );
189 206 *----------------------------------------------------------------------------*/
190 207 int float32_to_int32( float32 STATUS_PARAM );
191 208 int float32_to_int32_round_to_zero( float32 STATUS_PARAM );
  209 +unsigned int float32_to_uint32( float32 STATUS_PARAM );
  210 +unsigned int float32_to_uint32_round_to_zero( float32 STATUS_PARAM );
192 211 int64_t float32_to_int64( float32 STATUS_PARAM );
193 212 int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM );
194 213 float64 float32_to_float64( float32 STATUS_PARAM );
... ... @@ -215,13 +234,27 @@ char float32_lt( float32, float32 STATUS_PARAM );
215 234 char float32_eq_signaling( float32, float32 STATUS_PARAM );
216 235 char float32_le_quiet( float32, float32 STATUS_PARAM );
217 236 char float32_lt_quiet( float32, float32 STATUS_PARAM );
  237 +char float32_compare( float32, float32 STATUS_PARAM );
  238 +char float32_compare_quiet( float32, float32 STATUS_PARAM );
218 239 char float32_is_signaling_nan( float32 );
219 240  
  241 +INLINE float32 float32_abs(float32 a)
  242 +{
  243 + return a & 0x7fffffff;
  244 +}
  245 +
  246 +INLINE float32 float32_chs(float32 a)
  247 +{
  248 + return a ^ 0x80000000;
  249 +}
  250 +
220 251 /*----------------------------------------------------------------------------
221 252 | Software IEC/IEEE double-precision conversion routines.
222 253 *----------------------------------------------------------------------------*/
223 254 int float64_to_int32( float64 STATUS_PARAM );
224 255 int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
  256 +unsigned int float64_to_uint32( float64 STATUS_PARAM );
  257 +unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
225 258 int64_t float64_to_int64( float64 STATUS_PARAM );
226 259 int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
227 260 float32 float64_to_float32( float64 STATUS_PARAM );
... ... @@ -248,8 +281,20 @@ char float64_lt( float64, float64 STATUS_PARAM );
248 281 char float64_eq_signaling( float64, float64 STATUS_PARAM );
249 282 char float64_le_quiet( float64, float64 STATUS_PARAM );
250 283 char float64_lt_quiet( float64, float64 STATUS_PARAM );
  284 +char float64_compare( float64, float64 STATUS_PARAM );
  285 +char float64_compare_quiet( float64, float64 STATUS_PARAM );
251 286 char float64_is_signaling_nan( float64 );
252 287  
  288 +INLINE float64 float64_abs(float64 a)
  289 +{
  290 + return a & 0x7fffffffffffffffLL;
  291 +}
  292 +
  293 +INLINE float64 float64_chs(float64 a)
  294 +{
  295 + return a ^ 0x8000000000000000LL;
  296 +}
  297 +
253 298 #ifdef FLOATX80
254 299  
255 300 /*----------------------------------------------------------------------------
... ... @@ -283,6 +328,18 @@ char floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
283 328 char floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
284 329 char floatx80_is_signaling_nan( floatx80 );
285 330  
  331 +INLINE floatx80 floatx80_abs(floatx80 a)
  332 +{
  333 + a.high &= 0x7fff;
  334 + return a;
  335 +}
  336 +
  337 +INLINE floatx80 floatx80_chs(floatx80 a)
  338 +{
  339 + a.high ^= 0x8000;
  340 + return a;
  341 +}
  342 +
286 343 #endif
287 344  
288 345 #ifdef FLOAT128
... ... @@ -318,6 +375,18 @@ char float128_le_quiet( float128, float128 STATUS_PARAM );
318 375 char float128_lt_quiet( float128, float128 STATUS_PARAM );
319 376 char float128_is_signaling_nan( float128 );
320 377  
  378 +INLINE float128 float128_abs(float128 a)
  379 +{
  380 + a.high &= 0x7fffffffffffffffLL;
  381 + return a;
  382 +}
  383 +
  384 +INLINE float128 float128_chs(float128 a)
  385 +{
  386 + a.high ^= 0x8000000000000000LL;
  387 + return a;
  388 +}
  389 +
321 390 #endif
322 391  
323 392 #else /* CONFIG_SOFTFLOAT */
... ...