float.h 21 KB

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  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
  2. /*
  3. * Linux/PA-RISC Project (http://www.parisc-linux.org/)
  4. *
  5. * Floating-point emulation code
  6. * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
  7. */
  8. /*
  9. * BEGIN_DESC
  10. *
  11. * File:
  12. * @(#) pa/spmath/float.h $Revision: 1.1 $
  13. *
  14. * Purpose:
  15. * <<please update with a synopis of the functionality provided by this file>>
  16. *
  17. * BE header: no
  18. *
  19. * Shipped: yes
  20. * /usr/conf/pa/spmath/float.h
  21. *
  22. * END_DESC
  23. */
  24. #ifdef __NO_PA_HDRS
  25. PA header file -- do not include this header file for non-PA builds.
  26. #endif
  27. #include "fpbits.h"
  28. #include "hppa.h"
  29. /*
  30. * Want to pick up the FPU capability flags, not the PDC structures.
  31. * 'LOCORE' isn't really true in this case, but we don't want the C structures
  32. * so it suits our purposes
  33. */
  34. #define LOCORE
  35. #include "fpu.h"
  36. /*
  37. * Declare the basic structures for the 3 different
  38. * floating-point precisions.
  39. *
  40. * Single number
  41. * +-------+-------+-------+-------+-------+-------+-------+-------+
  42. * |s| exp | mantissa |
  43. * +-------+-------+-------+-------+-------+-------+-------+-------+
  44. */
  45. #define Sall(object) (object)
  46. #define Ssign(object) Bitfield_extract( 0, 1,object)
  47. #define Ssignedsign(object) Bitfield_signed_extract( 0, 1,object)
  48. #define Sexponent(object) Bitfield_extract( 1, 8,object)
  49. #define Smantissa(object) Bitfield_mask( 9, 23,object)
  50. #define Ssignaling(object) Bitfield_extract( 9, 1,object)
  51. #define Ssignalingnan(object) Bitfield_extract( 1, 9,object)
  52. #define Shigh2mantissa(object) Bitfield_extract( 9, 2,object)
  53. #define Sexponentmantissa(object) Bitfield_mask( 1, 31,object)
  54. #define Ssignexponent(object) Bitfield_extract( 0, 9,object)
  55. #define Shidden(object) Bitfield_extract( 8, 1,object)
  56. #define Shiddenoverflow(object) Bitfield_extract( 7, 1,object)
  57. #define Shiddenhigh7mantissa(object) Bitfield_extract( 8, 8,object)
  58. #define Shiddenhigh3mantissa(object) Bitfield_extract( 8, 4,object)
  59. #define Slow(object) Bitfield_mask( 31, 1,object)
  60. #define Slow4(object) Bitfield_mask( 28, 4,object)
  61. #define Slow31(object) Bitfield_mask( 1, 31,object)
  62. #define Shigh31(object) Bitfield_extract( 0, 31,object)
  63. #define Ssignedhigh31(object) Bitfield_signed_extract( 0, 31,object)
  64. #define Shigh4(object) Bitfield_extract( 0, 4,object)
  65. #define Sbit24(object) Bitfield_extract( 24, 1,object)
  66. #define Sbit28(object) Bitfield_extract( 28, 1,object)
  67. #define Sbit29(object) Bitfield_extract( 29, 1,object)
  68. #define Sbit30(object) Bitfield_extract( 30, 1,object)
  69. #define Sbit31(object) Bitfield_mask( 31, 1,object)
  70. #define Deposit_ssign(object,value) Bitfield_deposit(value,0,1,object)
  71. #define Deposit_sexponent(object,value) Bitfield_deposit(value,1,8,object)
  72. #define Deposit_smantissa(object,value) Bitfield_deposit(value,9,23,object)
  73. #define Deposit_shigh2mantissa(object,value) Bitfield_deposit(value,9,2,object)
  74. #define Deposit_sexponentmantissa(object,value) \
  75. Bitfield_deposit(value,1,31,object)
  76. #define Deposit_ssignexponent(object,value) Bitfield_deposit(value,0,9,object)
  77. #define Deposit_slow(object,value) Bitfield_deposit(value,31,1,object)
  78. #define Deposit_shigh4(object,value) Bitfield_deposit(value,0,4,object)
  79. #define Is_ssign(object) Bitfield_mask( 0, 1,object)
  80. #define Is_ssignaling(object) Bitfield_mask( 9, 1,object)
  81. #define Is_shidden(object) Bitfield_mask( 8, 1,object)
  82. #define Is_shiddenoverflow(object) Bitfield_mask( 7, 1,object)
  83. #define Is_slow(object) Bitfield_mask( 31, 1,object)
  84. #define Is_sbit24(object) Bitfield_mask( 24, 1,object)
  85. #define Is_sbit28(object) Bitfield_mask( 28, 1,object)
  86. #define Is_sbit29(object) Bitfield_mask( 29, 1,object)
  87. #define Is_sbit30(object) Bitfield_mask( 30, 1,object)
  88. #define Is_sbit31(object) Bitfield_mask( 31, 1,object)
  89. /*
  90. * Double number.
  91. * +-------+-------+-------+-------+-------+-------+-------+-------+
  92. * |s| exponent | mantissa part 1 |
  93. * +-------+-------+-------+-------+-------+-------+-------+-------+
  94. *
  95. * +-------+-------+-------+-------+-------+-------+-------+-------+
  96. * | mantissa part 2 |
  97. * +-------+-------+-------+-------+-------+-------+-------+-------+
  98. */
  99. #define Dallp1(object) (object)
  100. #define Dsign(object) Bitfield_extract( 0, 1,object)
  101. #define Dsignedsign(object) Bitfield_signed_extract( 0, 1,object)
  102. #define Dexponent(object) Bitfield_extract( 1, 11,object)
  103. #define Dmantissap1(object) Bitfield_mask( 12, 20,object)
  104. #define Dsignaling(object) Bitfield_extract( 12, 1,object)
  105. #define Dsignalingnan(object) Bitfield_extract( 1, 12,object)
  106. #define Dhigh2mantissa(object) Bitfield_extract( 12, 2,object)
  107. #define Dexponentmantissap1(object) Bitfield_mask( 1, 31,object)
  108. #define Dsignexponent(object) Bitfield_extract( 0, 12,object)
  109. #define Dhidden(object) Bitfield_extract( 11, 1,object)
  110. #define Dhiddenoverflow(object) Bitfield_extract( 10, 1,object)
  111. #define Dhiddenhigh7mantissa(object) Bitfield_extract( 11, 8,object)
  112. #define Dhiddenhigh3mantissa(object) Bitfield_extract( 11, 4,object)
  113. #define Dlowp1(object) Bitfield_mask( 31, 1,object)
  114. #define Dlow31p1(object) Bitfield_mask( 1, 31,object)
  115. #define Dhighp1(object) Bitfield_extract( 0, 1,object)
  116. #define Dhigh4p1(object) Bitfield_extract( 0, 4,object)
  117. #define Dhigh31p1(object) Bitfield_extract( 0, 31,object)
  118. #define Dsignedhigh31p1(object) Bitfield_signed_extract( 0, 31,object)
  119. #define Dbit3p1(object) Bitfield_extract( 3, 1,object)
  120. #define Deposit_dsign(object,value) Bitfield_deposit(value,0,1,object)
  121. #define Deposit_dexponent(object,value) Bitfield_deposit(value,1,11,object)
  122. #define Deposit_dmantissap1(object,value) Bitfield_deposit(value,12,20,object)
  123. #define Deposit_dhigh2mantissa(object,value) Bitfield_deposit(value,12,2,object)
  124. #define Deposit_dexponentmantissap1(object,value) \
  125. Bitfield_deposit(value,1,31,object)
  126. #define Deposit_dsignexponent(object,value) Bitfield_deposit(value,0,12,object)
  127. #define Deposit_dlowp1(object,value) Bitfield_deposit(value,31,1,object)
  128. #define Deposit_dhigh4p1(object,value) Bitfield_deposit(value,0,4,object)
  129. #define Is_dsign(object) Bitfield_mask( 0, 1,object)
  130. #define Is_dsignaling(object) Bitfield_mask( 12, 1,object)
  131. #define Is_dhidden(object) Bitfield_mask( 11, 1,object)
  132. #define Is_dhiddenoverflow(object) Bitfield_mask( 10, 1,object)
  133. #define Is_dlowp1(object) Bitfield_mask( 31, 1,object)
  134. #define Is_dhighp1(object) Bitfield_mask( 0, 1,object)
  135. #define Is_dbit3p1(object) Bitfield_mask( 3, 1,object)
  136. #define Dallp2(object) (object)
  137. #define Dmantissap2(object) (object)
  138. #define Dlowp2(object) Bitfield_mask( 31, 1,object)
  139. #define Dlow4p2(object) Bitfield_mask( 28, 4,object)
  140. #define Dlow31p2(object) Bitfield_mask( 1, 31,object)
  141. #define Dhighp2(object) Bitfield_extract( 0, 1,object)
  142. #define Dhigh31p2(object) Bitfield_extract( 0, 31,object)
  143. #define Dbit2p2(object) Bitfield_extract( 2, 1,object)
  144. #define Dbit3p2(object) Bitfield_extract( 3, 1,object)
  145. #define Dbit21p2(object) Bitfield_extract( 21, 1,object)
  146. #define Dbit28p2(object) Bitfield_extract( 28, 1,object)
  147. #define Dbit29p2(object) Bitfield_extract( 29, 1,object)
  148. #define Dbit30p2(object) Bitfield_extract( 30, 1,object)
  149. #define Dbit31p2(object) Bitfield_mask( 31, 1,object)
  150. #define Deposit_dlowp2(object,value) Bitfield_deposit(value,31,1,object)
  151. #define Is_dlowp2(object) Bitfield_mask( 31, 1,object)
  152. #define Is_dhighp2(object) Bitfield_mask( 0, 1,object)
  153. #define Is_dbit2p2(object) Bitfield_mask( 2, 1,object)
  154. #define Is_dbit3p2(object) Bitfield_mask( 3, 1,object)
  155. #define Is_dbit21p2(object) Bitfield_mask( 21, 1,object)
  156. #define Is_dbit28p2(object) Bitfield_mask( 28, 1,object)
  157. #define Is_dbit29p2(object) Bitfield_mask( 29, 1,object)
  158. #define Is_dbit30p2(object) Bitfield_mask( 30, 1,object)
  159. #define Is_dbit31p2(object) Bitfield_mask( 31, 1,object)
  160. /*
  161. * Quad number.
  162. * +-------+-------+-------+-------+-------+-------+-------+-------+
  163. * |s| exponent | mantissa part 1 |
  164. * +-------+-------+-------+-------+-------+-------+-------+-------+
  165. *
  166. * +-------+-------+-------+-------+-------+-------+-------+-------+
  167. * | mantissa part 2 |
  168. * +-------+-------+-------+-------+-------+-------+-------+-------+
  169. *
  170. * +-------+-------+-------+-------+-------+-------+-------+-------+
  171. * | mantissa part 3 |
  172. * +-------+-------+-------+-------+-------+-------+-------+-------+
  173. *
  174. * +-------+-------+-------+-------+-------+-------+-------+-------+
  175. * | mantissa part 4 |
  176. * +-------+-------+-------+-------+-------+-------+-------+-------+
  177. */
  178. typedef struct
  179. {
  180. union
  181. {
  182. struct { unsigned qallp1; } u_qallp1;
  183. /* Not needed for now...
  184. Bitfield_extract( 0, 1,u_qsign,qsign)
  185. Bitfield_signed_extract( 0, 1,u_qsignedsign,qsignedsign)
  186. Bitfield_extract( 1, 15,u_qexponent,qexponent)
  187. Bitfield_extract(16, 16,u_qmantissap1,qmantissap1)
  188. Bitfield_extract(16, 1,u_qsignaling,qsignaling)
  189. Bitfield_extract(1, 16,u_qsignalingnan,qsignalingnan)
  190. Bitfield_extract(16, 2,u_qhigh2mantissa,qhigh2mantissa)
  191. Bitfield_extract( 1, 31,u_qexponentmantissap1,qexponentmantissap1)
  192. Bitfield_extract( 0, 16,u_qsignexponent,qsignexponent)
  193. Bitfield_extract(15, 1,u_qhidden,qhidden)
  194. Bitfield_extract(14, 1,u_qhiddenoverflow,qhiddenoverflow)
  195. Bitfield_extract(15, 8,u_qhiddenhigh7mantissa,qhiddenhigh7mantissa)
  196. Bitfield_extract(15, 4,u_qhiddenhigh3mantissa,qhiddenhigh3mantissa)
  197. Bitfield_extract(31, 1,u_qlowp1,qlowp1)
  198. Bitfield_extract( 1, 31,u_qlow31p1,qlow31p1)
  199. Bitfield_extract( 0, 1,u_qhighp1,qhighp1)
  200. Bitfield_extract( 0, 4,u_qhigh4p1,qhigh4p1)
  201. Bitfield_extract( 0, 31,u_qhigh31p1,qhigh31p1)
  202. */
  203. } quad_u1;
  204. union
  205. {
  206. struct { unsigned qallp2; } u_qallp2;
  207. /* Not needed for now...
  208. Bitfield_extract(31, 1,u_qlowp2,qlowp2)
  209. Bitfield_extract( 1, 31,u_qlow31p2,qlow31p2)
  210. Bitfield_extract( 0, 1,u_qhighp2,qhighp2)
  211. Bitfield_extract( 0, 31,u_qhigh31p2,qhigh31p2)
  212. */
  213. } quad_u2;
  214. union
  215. {
  216. struct { unsigned qallp3; } u_qallp3;
  217. /* Not needed for now...
  218. Bitfield_extract(31, 1,u_qlowp3,qlowp3)
  219. Bitfield_extract( 1, 31,u_qlow31p3,qlow31p3)
  220. Bitfield_extract( 0, 1,u_qhighp3,qhighp3)
  221. Bitfield_extract( 0, 31,u_qhigh31p3,qhigh31p3)
  222. */
  223. } quad_u3;
  224. union
  225. {
  226. struct { unsigned qallp4; } u_qallp4;
  227. /* Not need for now...
  228. Bitfield_extract(31, 1,u_qlowp4,qlowp4)
  229. Bitfield_extract( 1, 31,u_qlow31p4,qlow31p4)
  230. Bitfield_extract( 0, 1,u_qhighp4,qhighp4)
  231. Bitfield_extract( 0, 31,u_qhigh31p4,qhigh31p4)
  232. */
  233. } quad_u4;
  234. } quad_floating_point;
  235. /* Extension - An additional structure to hold the guard, round and
  236. * sticky bits during computations.
  237. */
  238. #define Extall(object) (object)
  239. #define Extsign(object) Bitfield_extract( 0, 1,object)
  240. #define Exthigh31(object) Bitfield_extract( 0, 31,object)
  241. #define Extlow31(object) Bitfield_extract( 1, 31,object)
  242. #define Extlow(object) Bitfield_extract( 31, 1,object)
  243. /*
  244. * Single extended - The upper word is just like single precision,
  245. * but one additional word of mantissa is needed.
  246. */
  247. #define Sextallp1(object) (object)
  248. #define Sextallp2(object) (object)
  249. #define Sextlowp1(object) Bitfield_extract( 31, 1,object)
  250. #define Sexthighp2(object) Bitfield_extract( 0, 1,object)
  251. #define Sextlow31p2(object) Bitfield_extract( 1, 31,object)
  252. #define Sexthiddenoverflow(object) Bitfield_extract( 4, 1,object)
  253. #define Is_sexthiddenoverflow(object) Bitfield_mask( 4, 1,object)
  254. /*
  255. * Double extended - The upper two words are just like double precision,
  256. * but two additional words of mantissa are needed.
  257. */
  258. #define Dextallp1(object) (object)
  259. #define Dextallp2(object) (object)
  260. #define Dextallp3(object) (object)
  261. #define Dextallp4(object) (object)
  262. #define Dextlowp2(object) Bitfield_extract( 31, 1,object)
  263. #define Dexthighp3(object) Bitfield_extract( 0, 1,object)
  264. #define Dextlow31p3(object) Bitfield_extract( 1, 31,object)
  265. #define Dexthiddenoverflow(object) Bitfield_extract( 10, 1,object)
  266. #define Is_dexthiddenoverflow(object) Bitfield_mask( 10, 1,object)
  267. #define Deposit_dextlowp4(object,value) Bitfield_deposit(value,31,1,object)
  268. /*
  269. * Declare the basic structures for the 3 different
  270. * fixed-point precisions.
  271. *
  272. * Single number
  273. * +-------+-------+-------+-------+-------+-------+-------+-------+
  274. * |s| integer |
  275. * +-------+-------+-------+-------+-------+-------+-------+-------+
  276. */
  277. typedef int sgl_integer;
  278. /*
  279. * Double number.
  280. * +-------+-------+-------+-------+-------+-------+-------+-------+
  281. * |s| high integer |
  282. * +-------+-------+-------+-------+-------+-------+-------+-------+
  283. *
  284. * +-------+-------+-------+-------+-------+-------+-------+-------+
  285. * | low integer |
  286. * +-------+-------+-------+-------+-------+-------+-------+-------+
  287. */
  288. struct dint {
  289. int wd0;
  290. unsigned int wd1;
  291. };
  292. struct dblwd {
  293. unsigned int wd0;
  294. unsigned int wd1;
  295. };
  296. /*
  297. * Quad number.
  298. * +-------+-------+-------+-------+-------+-------+-------+-------+
  299. * |s| integer part1 |
  300. * +-------+-------+-------+-------+-------+-------+-------+-------+
  301. *
  302. * +-------+-------+-------+-------+-------+-------+-------+-------+
  303. * | integer part 2 |
  304. * +-------+-------+-------+-------+-------+-------+-------+-------+
  305. *
  306. * +-------+-------+-------+-------+-------+-------+-------+-------+
  307. * | integer part 3 |
  308. * +-------+-------+-------+-------+-------+-------+-------+-------+
  309. *
  310. * +-------+-------+-------+-------+-------+-------+-------+-------+
  311. * | integer part 4 |
  312. * +-------+-------+-------+-------+-------+-------+-------+-------+
  313. */
  314. struct quadwd {
  315. int wd0;
  316. unsigned int wd1;
  317. unsigned int wd2;
  318. unsigned int wd3;
  319. };
  320. typedef struct quadwd quad_integer;
  321. /* useful typedefs */
  322. typedef unsigned int sgl_floating_point;
  323. typedef struct dblwd dbl_floating_point;
  324. typedef struct dint dbl_integer;
  325. typedef struct dblwd dbl_unsigned;
  326. /*
  327. * Define the different precisions' parameters.
  328. */
  329. #define SGL_BITLENGTH 32
  330. #define SGL_EMAX 127
  331. #define SGL_EMIN (-126)
  332. #define SGL_BIAS 127
  333. #define SGL_WRAP 192
  334. #define SGL_INFINITY_EXPONENT (SGL_EMAX+SGL_BIAS+1)
  335. #define SGL_THRESHOLD 32
  336. #define SGL_EXP_LENGTH 8
  337. #define SGL_P 24
  338. #define DBL_BITLENGTH 64
  339. #define DBL_EMAX 1023
  340. #define DBL_EMIN (-1022)
  341. #define DBL_BIAS 1023
  342. #define DBL_WRAP 1536
  343. #define DBL_INFINITY_EXPONENT (DBL_EMAX+DBL_BIAS+1)
  344. #define DBL_THRESHOLD 64
  345. #define DBL_EXP_LENGTH 11
  346. #define DBL_P 53
  347. #define QUAD_BITLENGTH 128
  348. #define QUAD_EMAX 16383
  349. #define QUAD_EMIN (-16382)
  350. #define QUAD_BIAS 16383
  351. #define QUAD_WRAP 24576
  352. #define QUAD_INFINITY_EXPONENT (QUAD_EMAX+QUAD_BIAS+1)
  353. #define QUAD_P 113
  354. /* Boolean Values etc. */
  355. #define FALSE 0
  356. #define TRUE (!FALSE)
  357. #define NOT !
  358. #define XOR ^
  359. /* other constants */
  360. #undef NULL
  361. #define NULL 0
  362. #define NIL 0
  363. #define SGL 0
  364. #define DBL 1
  365. #define BADFMT 2
  366. #define QUAD 3
  367. /* Types */
  368. typedef int boolean;
  369. typedef int FORMAT;
  370. typedef int VOID;
  371. /* Declare status register equivalent to FPUs architecture.
  372. *
  373. * 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1
  374. * +-------+-------+-------+-------+-------+-------+-------+-------+
  375. * |V|Z|O|U|I|C| rsv | model | version |RM |rsv|T|r|V|Z|O|U|I|
  376. * +-------+-------+-------+-------+-------+-------+-------+-------+
  377. */
  378. #define Cbit(object) Bitfield_extract( 5, 1,object)
  379. #define Tbit(object) Bitfield_extract( 25, 1,object)
  380. #define Roundingmode(object) Bitfield_extract( 21, 2,object)
  381. #define Invalidtrap(object) Bitfield_extract( 27, 1,object)
  382. #define Divisionbyzerotrap(object) Bitfield_extract( 28, 1,object)
  383. #define Overflowtrap(object) Bitfield_extract( 29, 1,object)
  384. #define Underflowtrap(object) Bitfield_extract( 30, 1,object)
  385. #define Inexacttrap(object) Bitfield_extract( 31, 1,object)
  386. #define Invalidflag(object) Bitfield_extract( 0, 1,object)
  387. #define Divisionbyzeroflag(object) Bitfield_extract( 1, 1,object)
  388. #define Overflowflag(object) Bitfield_extract( 2, 1,object)
  389. #define Underflowflag(object) Bitfield_extract( 3, 1,object)
  390. #define Inexactflag(object) Bitfield_extract( 4, 1,object)
  391. #define Allflags(object) Bitfield_extract( 0, 5,object)
  392. /* Definitions relevant to the status register */
  393. /* Rounding Modes */
  394. #define ROUNDNEAREST 0
  395. #define ROUNDZERO 1
  396. #define ROUNDPLUS 2
  397. #define ROUNDMINUS 3
  398. /* Exceptions */
  399. #define NOEXCEPTION 0x0
  400. #define INVALIDEXCEPTION 0x20
  401. #define DIVISIONBYZEROEXCEPTION 0x10
  402. #define OVERFLOWEXCEPTION 0x08
  403. #define UNDERFLOWEXCEPTION 0x04
  404. #define INEXACTEXCEPTION 0x02
  405. #define UNIMPLEMENTEDEXCEPTION 0x01
  406. /* New exceptions for the 2E Opcode */
  407. #define OPC_2E_INVALIDEXCEPTION 0x30
  408. #define OPC_2E_OVERFLOWEXCEPTION 0x18
  409. #define OPC_2E_UNDERFLOWEXCEPTION 0x0c
  410. #define OPC_2E_INEXACTEXCEPTION 0x12
  411. /* Declare exception registers equivalent to FPUs architecture
  412. *
  413. * 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1
  414. * +-------+-------+-------+-------+-------+-------+-------+-------+
  415. * |excepttype | r1 | r2/ext | operation |parm |n| t/cond |
  416. * +-------+-------+-------+-------+-------+-------+-------+-------+
  417. */
  418. #define Allexception(object) (object)
  419. #define Exceptiontype(object) Bitfield_extract( 0, 6,object)
  420. #define Instructionfield(object) Bitfield_mask( 6,26,object)
  421. #define Parmfield(object) Bitfield_extract( 23, 3,object)
  422. #define Rabit(object) Bitfield_extract( 24, 1,object)
  423. #define Ibit(object) Bitfield_extract( 25, 1,object)
  424. #define Set_exceptiontype(object,value) Bitfield_deposit(value, 0, 6,object)
  425. #define Set_parmfield(object,value) Bitfield_deposit(value, 23, 3,object)
  426. #define Set_exceptiontype_and_instr_field(exception,instruction,object) \
  427. object = exception << 26 | instruction
  428. /* Declare the condition field
  429. *
  430. * 0 1 2 3 4 5 6 7 8 910 1 2 3 4 5 6 7 8 920 1 2 3 4 5 6 7 8 930 1
  431. * +-------+-------+-------+-------+-------+-------+-------+-------+
  432. * | |G|L|E|U|X|
  433. * +-------+-------+-------+-------+-------+-------+-------+-------+
  434. */
  435. #define Greaterthanbit(object) Bitfield_extract( 27, 1,object)
  436. #define Lessthanbit(object) Bitfield_extract( 28, 1,object)
  437. #define Equalbit(object) Bitfield_extract( 29, 1,object)
  438. #define Unorderedbit(object) Bitfield_extract( 30, 1,object)
  439. #define Exceptionbit(object) Bitfield_extract( 31, 1,object)
  440. /* An alias name for the status register */
  441. #define Fpustatus_register (*status)
  442. /**************************************************
  443. * Status register referencing and manipulation. *
  444. **************************************************/
  445. /* Rounding mode */
  446. #define Rounding_mode() Roundingmode(Fpustatus_register)
  447. #define Is_rounding_mode(rmode) \
  448. (Roundingmode(Fpustatus_register) == rmode)
  449. #define Set_rounding_mode(value) \
  450. Bitfield_deposit(value,21,2,Fpustatus_register)
  451. /* Boolean testing of the trap enable bits */
  452. #define Is_invalidtrap_enabled() Invalidtrap(Fpustatus_register)
  453. #define Is_divisionbyzerotrap_enabled() Divisionbyzerotrap(Fpustatus_register)
  454. #define Is_overflowtrap_enabled() Overflowtrap(Fpustatus_register)
  455. #define Is_underflowtrap_enabled() Underflowtrap(Fpustatus_register)
  456. #define Is_inexacttrap_enabled() Inexacttrap(Fpustatus_register)
  457. /* Set the indicated flags in the status register */
  458. #define Set_invalidflag() Bitfield_deposit(1,0,1,Fpustatus_register)
  459. #define Set_divisionbyzeroflag() Bitfield_deposit(1,1,1,Fpustatus_register)
  460. #define Set_overflowflag() Bitfield_deposit(1,2,1,Fpustatus_register)
  461. #define Set_underflowflag() Bitfield_deposit(1,3,1,Fpustatus_register)
  462. #define Set_inexactflag() Bitfield_deposit(1,4,1,Fpustatus_register)
  463. #define Clear_all_flags() Bitfield_deposit(0,0,5,Fpustatus_register)
  464. /* Manipulate the trap and condition code bits (tbit and cbit) */
  465. #define Set_tbit() Bitfield_deposit(1,25,1,Fpustatus_register)
  466. #define Clear_tbit() Bitfield_deposit(0,25,1,Fpustatus_register)
  467. #define Is_tbit_set() Tbit(Fpustatus_register)
  468. #define Is_cbit_set() Cbit(Fpustatus_register)
  469. #define Set_status_cbit(value) \
  470. Bitfield_deposit(value,5,1,Fpustatus_register)
  471. /*******************************
  472. * Condition field referencing *
  473. *******************************/
  474. #define Unordered(cond) Unorderedbit(cond)
  475. #define Equal(cond) Equalbit(cond)
  476. #define Lessthan(cond) Lessthanbit(cond)
  477. #define Greaterthan(cond) Greaterthanbit(cond)
  478. #define Exception(cond) Exceptionbit(cond)
  479. /* Defines for the extension */
  480. #define Ext_isone_sign(extent) (Extsign(extent))
  481. #define Ext_isnotzero(extent) \
  482. (Extall(extent))
  483. #define Ext_isnotzero_lower(extent) \
  484. (Extlow31(extent))
  485. #define Ext_leftshiftby1(extent) \
  486. Extall(extent) <<= 1
  487. #define Ext_negate(extent) \
  488. (int )Extall(extent) = 0 - (int )Extall(extent)
  489. #define Ext_setone_low(extent) Bitfield_deposit(1,31,1,extent)
  490. #define Ext_setzero(extent) Extall(extent) = 0
  491. typedef int operation;
  492. /* error messages */
  493. #define NONE 0
  494. #define UNDEFFPINST 1
  495. /* Function definitions: opcode, opclass */
  496. #define FTEST (1<<2) | 0
  497. #define FCPY (2<<2) | 0
  498. #define FABS (3<<2) | 0
  499. #define FSQRT (4<<2) | 0
  500. #define FRND (5<<2) | 0
  501. #define FCNVFF (0<<2) | 1
  502. #define FCNVXF (1<<2) | 1
  503. #define FCNVFX (2<<2) | 1
  504. #define FCNVFXT (3<<2) | 1
  505. #define FCMP (0<<2) | 2
  506. #define FADD (0<<2) | 3
  507. #define FSUB (1<<2) | 3
  508. #define FMPY (2<<2) | 3
  509. #define FDIV (3<<2) | 3
  510. #define FREM (4<<2) | 3