1 ; SPARC 32/64 FPU description. -*- Scheme -*-
2 ; This file contains fpu instructions common to both sparc32/sparc64.
3 ; It also contains sparc32/64 specific insns, but only when they are a variant
4 ; of a collection of common ones (at least that's the current theory).
5 ; Copyright (C) 2000 Red Hat, Inc.
6 ; This file is part of CGEN.
7 ; See file COPYING.CGEN for details.
9 ; FP support is defined even for cpu's without an fpu as the instructions
10 ; still have to be assembled and the simulator still has to recognize them
11 ; so that the appropriate trap can be generated.
13 ; The physical registers are stored as an array of SI values: here `SI'
14 ; denotes "set of 32 bits" rather than "32 bit signed integer".
16 ; wip: currently evaluating the various possibilities
18 ; Floating point hardware.
20 ; The description needs to know whether the fpu is present.
21 ; Creating a utility register for this purposes seems reasonable.
22 ; Might want an attribute to denote it as such.
24 (dsh h-fpu? "h/w fpu present?" () (register BI))
25 (dnop fpu? "h/w fpu present?" () h-fpu? f-nil)
27 (define-pmacro (build-freg-name n) ((.sym f n) n))
32 (comment "sparc32 floating point regs")
34 (type register SI (32))
35 (indices keyword "%" (.map build-freg-name (.iota 32)))
40 (comment "sparc64 floating point regs")
42 (type register SI (64))
43 (indices keyword "%" (.map build-freg-name (.iota 64)))
49 (comment "sparc32 double precision floating point regs")
50 (attrs VIRTUAL (MACH32))
51 (type register DI (16))
52 ; ??? This works, but multiple copies of all the register names might be
53 ; unpalatable. Another way is to specify a register table plus a constraint.
54 ;(indices keyword "%" (.map build-freg-name (.iota 16 0 2)))
55 (get (index) (join DI SI
57 (reg h-fr (add index 1))))
60 (set (reg h-fr index) (subword SI newval 0))
61 (set (reg h-fr (add index 1)) (subword SI newval 1))))
67 (comment "sparc32 quad precision floating point regs")
68 (attrs VIRTUAL (MACH32))
69 (type register TF (8))
70 (indices keyword "%" (.map build-freg-name (.iota 8 0 4)))
71 (get (index) (join TF SI
73 (reg h-fr (add index (const 1)))
74 (reg h-fr (add index (const 2)))
75 (reg h-fr (add index (const 3)))))
78 (set (reg h-fr index) (subword SI newval 0))
79 (set (reg h-fr (add index (const 1))) (subword SI newval 1))
80 (set (reg h-fr (add index (const 2))) (subword SI newval 2))
81 (set (reg h-fr (add index (const 3))) (subword SI newval 3))))
87 (comment "sparc64 double precision floating point regs")
88 (attrs VIRTUAL (MACH64))
89 (type register DF (32))
90 (indices keyword "%" (.map build-freg-name (.iota 32 0 2)))
91 (get (index) (join DF SI
93 (reg h-fr (add index (const 1)))))
96 (set (reg h-fr index) (subword SI newval 0))
97 (set (reg h-fr (add index (const 1))) (subword SI newval 1))))
102 (semantic-name h-frq)
103 (comment "sparc64 quad precision floating point regs")
104 (attrs VIRTUAL (MACH64))
105 (type register TF (16))
106 (indices keyword "%" (.map build-freg-name (.iota 16 0 4)))
107 (get (index) (join TF SI
109 (reg h-fr (add index (const 1)))
110 (reg h-fr (add index (const 2)))
111 (reg h-fr (add index (const 3)))))
114 (set (reg h-fr index) (subword SI newval 0))
115 (set (reg h-fr (add index (const 1))) (subword SI newval 1))
116 (set (reg h-fr (add index (const 2))) (subword SI newval 2))
117 (set (reg h-fr (add index (const 3))) (subword SI newval 3))))
122 (dsh h-fcc0 "%fcc0" () (register (UINT 2)))
123 (dsh h-fcc1 "%fcc1" ((MACH64)) (register (UINT 2)))
124 (dsh h-fcc2 "%fcc2" ((MACH64)) (register (UINT 2)))
125 (dsh h-fcc3 "%fcc3" ((MACH64)) (register (UINT 2)))
127 ; sparc64 fpu control regs
129 (dsh h-fsr-rd "fsr rounding direction" ((MACH64)) (register UQI))
130 (dsh h-fsr-tem "fsr trap enable mask" ((MACH64)) (register UQI))
131 (dsh h-fsr-ns "fsr nonstandard fp" ((MACH64)) (register BI))
132 (dsh h-fsr-ver "fsr version" ((MACH64)) (register UQI))
133 (dsh h-fsr-ftt "fsr fp trap type" ((MACH64)) (register UQI))
134 (dsh h-fsr-qne "fsr queue not empty" ((MACH64)) (register BI))
135 (dsh h-fsr-aexc "fsr accrued exception" ((MACH64)) (register UQI))
136 (dsh h-fsr-cexc "fsr current exception" ((MACH64)) (register UQI))
137 ;(dsh h-fsr "floating point state" ((MACH64)) (register UDI))
139 (dsh h-fpsr-fef "fpsr enable fp" ((MACH64)) (register BI))
140 (dsh h-fpsr-du "fpsr dirty upper" ((MACH64)) (register BI))
141 (dsh h-fpsr-dl "fpsr dirty lower" ((MACH64)) (register BI))
145 (comment "fp regs state")
146 (attrs VIRTUAL (MACH64))
148 (get () (const 0)) ; FIXME
149 (set (newval) (set (raw-reg UQI h-fpsr) (const 0))) ; FIXME
152 ; Floating point operands.
156 (comment "single precision floating point source register 1")
163 (comment "single precision floating point source register 2")
170 (comment "single precision floating point dest'n register")
178 (comment "double precision floating point source register 1")
186 (comment "double precision floating point source register 2")
194 (comment "double precision floating point dest'n register")
201 (dnop frs1q "quad precision floating point source register 1" ((MACH32))
203 (dnop frs2q "quad precision floating point source register 2" ((MACH32))
205 (dnop frdq "quad precision floating point dest'n register" ((MACH32))
208 ; Encoding/decoding of field for sparc64 requires extra effort.
209 ; See v9 page 40: 5.1.4.1 Floating-Point Register Number Encoding.
210 (df f-frs1d-64 "rs1 field for sparc64 DF regs" ((MACH64)) 18 5 UINT
211 ((value pc) (or INT (srl value (const 5)) (and value (const #x1e))))
212 ((value pc) (or INT (sll (and value (const 1)) (const 5))
213 (and value (const #x1e))))
215 (df f-frs2d-64 "rs2 field for sparc64 DF regs" ((MACH64)) 4 5 UINT
216 ((value pc) (or INT (srl value (const 5)) (and value (const #x1e))))
217 ((value pc) (or INT (sll (and value (const 1)) (const 5))
218 (and value (const #x1e))))
220 (df f-frdd-64 "rd field for sparc64 DF regs" ((MACH64)) 29 5 UINT
221 ((value pc) (or INT (srl value (const 5)) (and value (const #x1e))))
222 ((value pc) (or INT (sll (and value (const 1)) (const 5))
223 (and value (const #x1e))))
225 (dnop frs1d "double precision floating point source register 1" ((MACH64))
227 (dnop frs2d "double precision floating point source register 2" ((MACH64))
229 (dnop frdd "double precision floating point dest'n register" ((MACH64))
232 ; Encoding/decoding of field for sparc64 requires extra effort.
233 ; See v9 page 40: 5.1.4.1 Floating-Point Register Number Encoding.
234 (df f-frs1q-64 "rs1 field for sparc64 TF regs" ((MACH64)) 18 5 UINT
235 ((value pc) (or INT (srl value (const 5)) (and value (const #x1e))))
236 ((value pc) (or INT (sll (and value (const 1)) (const 5))
237 (and value (const #x1e))))
239 (df f-frs2q-64 "rs2 field for sparc64 TF regs" ((MACH64)) 4 5 UINT
240 ((value pc) (or INT (srl value (const 5)) (and value (const #x1e))))
241 ((value pc) (or INT (sll (and value (const 1)) (const 5))
242 (and value (const #x1e))))
244 (df f-frdq-64 "rd field for sparc64 TF regs" ((MACH64)) 29 5 UINT
245 ((value pc) (or INT (srl value (const 5)) (and value (const #x1e))))
246 ((value pc) (or INT (sll (and value (const 1)) (const 5))
247 (and value (const #x1e))))
249 (dnop frs1q "quad precision floating point source register 1" ((MACH64))
251 (dnop frs2q "quad precision floating point source register 2" ((MACH64))
253 (dnop frdq "quad precision floating point dest'n register" ((MACH64))
256 (dnop fcc0 "%fcc0" () h-fcc0 f-nil)
258 ; Misc. support macros.
260 ; FIXME: sparc32/sparc64 differences
261 ; FIXME: trap handling in general (c-call's used until more thought invested)
263 ; Check if fpu is present and enabled.
265 (define-pmacro (check-fp-enabled)
266 ; FIXME: more things to check
268 (c-call VOID "@cpu@_hw_trap" pc (c-code INT "TRAP32_FP_DIS")))
271 ; Return pointer to FPU.
272 ; ??? wip. maybe move `snan?' to language proper?
274 (define-pmacro (current-fpu) (c-call PTR "CGEN_CPU_FPU"))
276 ; Issue appropriate trap if x is an snan.
278 (define-pmacro (check-sf-snan x)
279 (if (c-raw-call BI "cgen_sf_snan_p" (current-fpu) x)
280 (c-call VOID "@cpu@_hw_trap" pc (c-code INT "TRAP32_FP_DIS"))) ; FIXME
283 (define-pmacro (check-df-snan x)
284 (if (c-raw-call BI "cgen_df_snan_p" (current-fpu) x)
285 (c-call VOID "@cpu@_hw_trap" pc (c-code INT "TRAP32_FP_DIS"))) ; FIXME
288 ; Floating point memory ops.
290 ; Note: the startup code uses a load to %f0 to see if an fpu is present.
291 ; Other startup code tries to set the EF bit in the PSR.
293 (define-pmacro (fp-ld-op name comment op3 mode dest)
295 (dnmi (.sym name "f-reg") comment ()
296 (.str name " [$rs1],$" dest)
297 (emit (.sym name f-reg+reg) rs1 (rs2 0) dest))
298 (dnmi (.sym name "f-reg+0") comment ()
299 (.str name " [$rs1],$" dest)
300 (emit (.sym name f-reg+imm) rs1 (simm13 0) dest))
301 (dni (.sym name "f-reg+reg") comment ()
302 (.str name " [$rs1+$rs2],$" dest)
303 (+ OP_3 op3 dest rs1 (f-i 0) (f-res-asi 0) rs2)
306 (set dest (mem mode (add WI rs1 rs2))))
308 (dni (.sym name "f-reg+imm") comment ()
309 (.str name " [$rs1+$simm13],$" dest)
310 (+ OP_3 op3 dest rs1 (f-i 1) simm13)
313 (set dest (mem mode (add WI rs1 simm13))))
315 (dnmi (.sym name "f-reg/asi") comment ()
316 (.str name " [$rs1]$asi,$" dest)
317 (emit (.sym name f-reg+reg/asi) rs1 (rs2 0) asi dest))
318 (dni (.sym name "f-reg+reg/asi") comment ()
319 (.str name " [$rs1+$rs2]$asi,$" dest)
320 (+ OP_3 (.sym op3 A) dest rs1 (f-i 0) asi rs2)
323 (set dest (mem mode (add WI rs1 rs2))))
327 (fp-ld-op ld "fp SF load" OP3_LDF SF frds)
328 (fp-ld-op ldd "fp DF load" OP3_LDDF DF frdd)
330 (define-pmacro (fp-st-op name comment op3 mode src)
332 (dnmi (.sym name "f-reg") comment ()
333 (.str name " $" src ",[$rs1]")
334 (emit (.sym name f-reg+reg) rs1 (rs2 0) src))
335 (dnmi (.sym name "f-reg+0") comment ()
336 (.str name " $" src ",[$rs1]")
337 (emit (.sym name f-reg+imm) rs1 (simm13 0) src))
338 (dni (.sym name "f-reg+reg") comment ()
339 (.str name " $" src ",[$rs1+$rs2]")
340 (+ OP_3 op3 src rs1 (f-i 0) (f-res-asi 0) rs2)
343 (set (mem mode (add WI rs1 rs2)) src))
345 (dni (.sym name "f-reg+imm") comment ()
346 (.str name " $" src ",[$rs1+$simm13]")
347 (+ OP_3 op3 src rs1 (f-i 1) simm13)
350 (set (mem mode (add WI rs1 simm13)) src))
352 (dnmi (.sym name "f-reg/asi") comment ()
353 (.str name " $" src ",[$rs1]$asi")
354 (emit (.sym name -reg+reg/asi) rs1 (rs2 0) asi src))
355 (dni (.sym name "f-reg+reg/asi") comment ()
356 (.str name " $" src ",[$rs1+$rs2]$asi")
357 (+ OP_3 (.sym op3 A) src rs1 (f-i 0) asi rs2)
360 (set (mem mode (add WI rs1 rs2)) src))
364 (fp-st-op st "fp SF store" OP3_STF SF frds)
365 (fp-st-op std "fp DF store" OP3_STDF DF frdd)
367 ; SF mode arithmetic ops.
369 (define-pmacro (sf-unary-op name comment op3 fpop1 fn)
372 (.str name " $frs1s,$frds")
373 (+ OP_2 op3 fpop1 frds frs1s (f-rs2 0))
376 (set frds (fn frs1s))
377 ; ??? dest is modified if snan, assign to tmp first?
378 ; [grep for all check-*-snan's]
379 (check-sf-snan frds))
384 (define-pmacro (sf-binary-op name comment op3 fpop1 fn)
387 (.str name " $frs1s,$frs2s,$frds")
388 (+ OP_2 op3 fpop1 frds frs1s frs2s)
391 (set frds (fn frs1s frs2s))
392 (check-sf-snan frds))
397 (sf-unary-op fnegs "32 bit fp neg" OP3_FPOPS1 FPOPS1_FNEGS neg)
398 (sf-unary-op fabss "32 bit fp abs" OP3_FPOPS1 FPOPS1_FABSS abs)
400 (sf-binary-op fadds "32 bit fp add" OP3_FPOPS1 FPOPS1_FADDS add)
401 (sf-binary-op fsubs "32 bit fp sub" OP3_FPOPS1 FPOPS1_FSUBS sub)
402 (sf-binary-op fmuls "32 bit fp mul" OP3_FPOPS1 FPOPS1_FMULS mul)
403 (sf-binary-op fdivs "32 bit fp div" OP3_FPOPS1 FPOPS1_FDIVS div)
405 ; ??? floating point compares are wip
407 (dni fp-fcmps "32 bit compare" ()
408 "fcmps $frs1s,$frs2s"
409 (+ OP_2 OP3_FPOPS2 FPOPS2_FCMPS (f-rd 0) frs1s frs2s)
412 (set fcc0 (c-call UINT "SFCMP" frs1s frs2s)))
416 (dni fp-fcmpse "32 bit compare, signal if any nans" ()
417 "fcmpse $frs1s,$frs2s"
418 (+ OP_2 OP3_FPOPS2 FPOPS2_FCMPSE (f-rd 0) frs1s frs2s)
421 (check-sf-snan frs1s)
422 (check-sf-snan frs2s)
423 (set fcc0 (c-call UINT "SFCMP" frs1s frs2s)))
427 ; DF mode arithmetic ops.
429 (define-pmacro (df-unary-op name comment op3 fpop1 fn)
432 (.str name " $frs1d,$frdd")
433 (+ OP_2 op3 fpop1 frdd frs1d (f-rs2 0))
436 (set frdd (fn frs1d))
437 (check-df-snan frdd))
442 (define-pmacro (df-binary-op name comment op3 fpop1 fn)
445 (.str name " $frs1d,$frs2d,$frdd")
446 (+ OP_2 op3 fpop1 frdd frs1d frs2d)
449 (set frdd (fn frs1d frs2d))
450 (check-df-snan frdd))
455 (df-unary-op fnegd "64 bit fp neg" OP3_FPOPS1 FPOPS1_FNEGD neg)
456 (df-unary-op fabsd "64 bit fp abs" OP3_FPOPS1 FPOPS1_FABSD abs)
458 (df-binary-op faddd "64 bit fp add" OP3_FPOPS1 FPOPS1_FADDD add)
459 (df-binary-op fsubd "64 bit fp sub" OP3_FPOPS1 FPOPS1_FSUBD sub)
460 (df-binary-op fmuld "64 bit fp mul" OP3_FPOPS1 FPOPS1_FMULD mul)
461 (df-binary-op fdivd "64 bit fp div" OP3_FPOPS1 FPOPS1_FDIVD div)
463 ; ??? floating point compares are wip
465 (dni fp-fcmpd "64 bit compare" ()
466 "fcmpd $frs1d,$frs2d"
467 (+ OP_2 OP3_FPOPS2 FPOPS2_FCMPD (f-rd 0) frs1d frs2d)
470 (set fcc0 (c-call UINT "DFCMP" frs1d frs2d)))
474 (dni fp-fcmpde "64 bit compare, signal if any nans" ()
475 "fcmpde $frs1d,$frs2d"
476 (+ OP_2 OP3_FPOPS2 FPOPS2_FCMPDE (f-rd 0) frs1d frs2d)
479 (check-df-snan frs1d)
480 (check-df-snan frs2d)
481 (set fcc0 (c-call UINT "DFCMP" frs1d frs2d)))
487 ; CC is one of fcc0,fcc
488 (define-pmacro (ftest-u cc) (eq cc FCC_UN))
489 (define-pmacro (ftest-g cc) (eq cc FCC_GT))
490 (define-pmacro (ftest-ug cc) (orif (eq cc FCC_UN) (eq cc FCC_GT)))
491 (define-pmacro (ftest-l cc) (eq cc FCC_LT))
492 (define-pmacro (ftest-ul cc) (orif (eq cc FCC_UN) (eq cc FCC_LT)))
493 (define-pmacro (ftest-lg cc) (orif (eq cc FCC_LT) (eq cc FCC_GT)))
494 (define-pmacro (ftest-ne cc) (ne cc FCC_EQ))
495 (define-pmacro (ftest-e cc) (eq cc FCC_EQ))
496 (define-pmacro (ftest-ue cc) (orif (eq cc FCC_UN) (eq cc FCC_EQ)))
497 (define-pmacro (ftest-ge cc) (orif (eq cc FCC_GT) (eq cc FCC_EQ)))
498 (define-pmacro (ftest-uge cc) (ne cc FCC_LT))
499 (define-pmacro (ftest-le cc) (orif (eq cc FCC_LT) (eq cc FCC_EQ)))
500 (define-pmacro (ftest-ule cc) (ne cc FCC_GT))
501 (define-pmacro (ftest-o cc) (ne cc FCC_UN))
503 (define-pmacro (fbfcc-branch bname comment cond test br-sem)
505 (dni bname (.str "fp branch " comment) (V9-DEPRECATED)
506 (.str bname "$a $disp22")
507 (+ OP_0 a cond OP2_FBFCC disp22)
512 (fbfcc-branch fba "always" FCOND_A test-always uncond-br-sem)
513 (fbfcc-branch fbn "never" FCOND_N test-never uncond-br-sem)
514 (fbfcc-branch fbu "unordered" FCOND_U ftest-u cond-br-sem)
515 (fbfcc-branch fbg "greater" FCOND_G ftest-g cond-br-sem)
516 (fbfcc-branch fbug "unordered or greater" FCOND_UG ftest-ug cond-br-sem)
517 (fbfcc-branch fbl "less" FCOND_L ftest-l cond-br-sem)
518 (fbfcc-branch fbul "unordered or less" FCOND_UL ftest-ul cond-br-sem)
519 (fbfcc-branch fblg "less or greater" FCOND_LG ftest-lg cond-br-sem)
520 (fbfcc-branch fbne "not equal" FCOND_NE ftest-ne cond-br-sem)
521 (fbfcc-branch fbe "equal" FCOND_E ftest-e cond-br-sem)
522 (fbfcc-branch fbue "unordered or equal" FCOND_UE ftest-ue cond-br-sem)
523 (fbfcc-branch fbge "greater or equal" FCOND_GE ftest-ge cond-br-sem)
524 (fbfcc-branch fbuge "unordered or greater or equal" FCOND_UGE ftest-uge cond-br-sem)
525 (fbfcc-branch fble "less or equal" FCOND_LE ftest-le cond-br-sem)
526 (fbfcc-branch fbule "unordered or less or equal" FCOND_ULE ftest-ule cond-br-sem)
527 (fbfcc-branch fbo "ordered" FCOND_O ftest-o cond-br-sem)