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|
;; This file contains instructions that support fixed-point operations
;; for Atmel AVR micro controllers.
;; Copyright (C) 2012-2013 Free Software Foundation, Inc.
;;
;; Contributed by Sean D'Epagnier (sean@depagnier.com)
;; Georg-Johann Lay (avr@gjlay.de)
;; This file is part of GCC.
;;
;; GCC is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;;
;; GCC is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GCC; see the file COPYING3. If not see
;; <http://www.gnu.org/licenses/>.
(define_mode_iterator ALL1Q [QQ UQQ])
(define_mode_iterator ALL2Q [HQ UHQ])
(define_mode_iterator ALL2A [HA UHA])
(define_mode_iterator ALL4A [SA USA])
(define_mode_iterator ALL2QA [HQ UHQ HA UHA])
(define_mode_iterator ALL4QA [SQ USQ SA USA])
(define_mode_iterator ALL124QA [ QQ HQ HA SA SQ
UQQ UHQ UHA USA USQ])
(define_mode_iterator ALL2S [HQ HA])
(define_mode_iterator ALL4S [SA SQ])
(define_mode_iterator ALL24S [ HQ HA SA SQ])
(define_mode_iterator ALL124S [ QQ HQ HA SA SQ])
(define_mode_iterator ALL124U [UQQ UHQ UHA USA USQ])
;;; Conversions
(define_mode_iterator FIXED_A
[QQ UQQ
HQ UHQ HA UHA
SQ USQ SA USA
DQ UDQ DA UDA
TA UTA
QI HI SI DI])
;; Same so that be can build cross products
(define_mode_iterator FIXED_B
[QQ UQQ
HQ UHQ HA UHA
SQ USQ SA USA
DQ UDQ DA UDA
TA UTA
QI HI SI DI])
(define_insn "fract<FIXED_B:mode><FIXED_A:mode>2"
[(set (match_operand:FIXED_A 0 "register_operand" "=r")
(fract_convert:FIXED_A
(match_operand:FIXED_B 1 "register_operand" "r")))]
"<FIXED_B:MODE>mode != <FIXED_A:MODE>mode"
{
return avr_out_fract (insn, operands, true, NULL);
}
[(set_attr "cc" "clobber")
(set_attr "adjust_len" "sfract")])
(define_insn "fractuns<FIXED_B:mode><FIXED_A:mode>2"
[(set (match_operand:FIXED_A 0 "register_operand" "=r")
(unsigned_fract_convert:FIXED_A
(match_operand:FIXED_B 1 "register_operand" "r")))]
"<FIXED_B:MODE>mode != <FIXED_A:MODE>mode"
{
return avr_out_fract (insn, operands, false, NULL);
}
[(set_attr "cc" "clobber")
(set_attr "adjust_len" "ufract")])
;******************************************************************************
;** Saturated Addition and Subtraction
;******************************************************************************
;; Fixme: It would be nice if we could expand the 32-bit versions to a
;; transparent libgcc call if $2 is a REG. Problem is that it is
;; not possible to describe that addition is commutative.
;; And defining register classes/constraintrs for the involved hard
;; registers and let IRA do the work, yields inacceptable bloated code.
;; Thus, we have to live with the up to 11 instructions that are output
;; for these 32-bit saturated operations.
;; "ssaddqq3" "ssaddhq3" "ssaddha3" "ssaddsq3" "ssaddsa3"
;; "sssubqq3" "sssubhq3" "sssubha3" "sssubsq3" "sssubsa3"
(define_insn "<code_stdname><mode>3"
[(set (match_operand:ALL124S 0 "register_operand" "=??d,d")
(ss_addsub:ALL124S (match_operand:ALL124S 1 "register_operand" "<abelian>0,0")
(match_operand:ALL124S 2 "nonmemory_operand" "r,Ynn")))]
""
{
return avr_out_plus (insn, operands);
}
[(set_attr "cc" "clobber")
(set_attr "adjust_len" "plus")])
;; "usadduqq3" "usadduhq3" "usadduha3" "usaddusq3" "usaddusa3"
;; "ussubuqq3" "ussubuhq3" "ussubuha3" "ussubusq3" "ussubusa3"
(define_insn "<code_stdname><mode>3"
[(set (match_operand:ALL124U 0 "register_operand" "=??r,d")
(us_addsub:ALL124U (match_operand:ALL124U 1 "register_operand" "<abelian>0,0")
(match_operand:ALL124U 2 "nonmemory_operand" "r,Ynn")))]
""
{
return avr_out_plus (insn, operands);
}
[(set_attr "cc" "clobber")
(set_attr "adjust_len" "plus")])
;******************************************************************************
;** Saturated Negation and Absolute Value
;******************************************************************************
;; Fixme: This will always result in 0. Dunno why simplify-rtx.c says
;; "unknown" on how to optimize this. libgcc call would be in order,
;; but the performance is *PLAIN* *HORROR* because the optimizers don't
;; manage to optimize out MEMCPY that's sprincled all over fixed-bit.c */
(define_expand "usneg<mode>2"
[(parallel [(match_operand:ALL124U 0 "register_operand" "")
(match_operand:ALL124U 1 "nonmemory_operand" "")])]
""
{
emit_move_insn (operands[0], CONST0_RTX (<MODE>mode));
DONE;
})
(define_insn "ssnegqq2"
[(set (match_operand:QQ 0 "register_operand" "=r")
(ss_neg:QQ (match_operand:QQ 1 "register_operand" "0")))]
""
"neg %0\;brvc 0f\;dec %0\;0:"
[(set_attr "cc" "clobber")
(set_attr "length" "3")])
(define_insn "ssabsqq2"
[(set (match_operand:QQ 0 "register_operand" "=r")
(ss_abs:QQ (match_operand:QQ 1 "register_operand" "0")))]
""
"sbrc %0,7\;neg %0\;sbrc %0,7\;dec %0"
[(set_attr "cc" "clobber")
(set_attr "length" "4")])
;; "ssneghq2" "ssnegha2" "ssnegsq2" "ssnegsa2"
;; "ssabshq2" "ssabsha2" "ssabssq2" "ssabssa2"
(define_expand "<code_stdname><mode>2"
[(set (match_dup 2)
(match_operand:ALL24S 1 "register_operand" ""))
(set (match_dup 2)
(ss_abs_neg:ALL24S (match_dup 2)))
(set (match_operand:ALL24S 0 "register_operand" "")
(match_dup 2))]
""
{
operands[2] = gen_rtx_REG (<MODE>mode, 26 - GET_MODE_SIZE (<MODE>mode));
})
;; "*ssneghq2" "*ssnegha2"
;; "*ssabshq2" "*ssabsha2"
(define_insn "*<code_stdname><mode>2"
[(set (reg:ALL2S 24)
(ss_abs_neg:ALL2S (reg:ALL2S 24)))]
""
"%~call __<code_stdname>_2"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; "*ssnegsq2" "*ssnegsa2"
;; "*ssabssq2" "*ssabssa2"
(define_insn "*<code_stdname><mode>2"
[(set (reg:ALL4S 22)
(ss_abs_neg:ALL4S (reg:ALL4S 22)))]
""
"%~call __<code_stdname>_4"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;******************************************************************************
; mul
;; "mulqq3" "muluqq3"
(define_expand "mul<mode>3"
[(parallel [(match_operand:ALL1Q 0 "register_operand" "")
(match_operand:ALL1Q 1 "register_operand" "")
(match_operand:ALL1Q 2 "register_operand" "")])]
""
{
emit_insn (AVR_HAVE_MUL
? gen_mul<mode>3_enh (operands[0], operands[1], operands[2])
: gen_mul<mode>3_nomul (operands[0], operands[1], operands[2]));
DONE;
})
(define_insn "mulqq3_enh"
[(set (match_operand:QQ 0 "register_operand" "=r")
(mult:QQ (match_operand:QQ 1 "register_operand" "a")
(match_operand:QQ 2 "register_operand" "a")))]
"AVR_HAVE_MUL"
"fmuls %1,%2\;dec r1\;brvs 0f\;inc r1\;0:\;mov %0,r1\;clr __zero_reg__"
[(set_attr "length" "6")
(set_attr "cc" "clobber")])
(define_insn "muluqq3_enh"
[(set (match_operand:UQQ 0 "register_operand" "=r")
(mult:UQQ (match_operand:UQQ 1 "register_operand" "r")
(match_operand:UQQ 2 "register_operand" "r")))]
"AVR_HAVE_MUL"
"mul %1,%2\;mov %0,r1\;clr __zero_reg__"
[(set_attr "length" "3")
(set_attr "cc" "clobber")])
(define_expand "mulqq3_nomul"
[(set (reg:QQ 24)
(match_operand:QQ 1 "register_operand" ""))
(set (reg:QQ 25)
(match_operand:QQ 2 "register_operand" ""))
;; "*mulqq3.call"
(parallel [(set (reg:QQ 23)
(mult:QQ (reg:QQ 24)
(reg:QQ 25)))
(clobber (reg:QI 22))
(clobber (reg:HI 24))])
(set (match_operand:QQ 0 "register_operand" "")
(reg:QQ 23))]
"!AVR_HAVE_MUL")
(define_expand "muluqq3_nomul"
[(set (reg:UQQ 22)
(match_operand:UQQ 1 "register_operand" ""))
(set (reg:UQQ 24)
(match_operand:UQQ 2 "register_operand" ""))
;; "*umulqihi3.call"
(parallel [(set (reg:HI 24)
(mult:HI (zero_extend:HI (reg:QI 22))
(zero_extend:HI (reg:QI 24))))
(clobber (reg:QI 21))
(clobber (reg:HI 22))])
(set (match_operand:UQQ 0 "register_operand" "")
(reg:UQQ 25))]
"!AVR_HAVE_MUL")
(define_insn "*mulqq3.call"
[(set (reg:QQ 23)
(mult:QQ (reg:QQ 24)
(reg:QQ 25)))
(clobber (reg:QI 22))
(clobber (reg:HI 24))]
"!AVR_HAVE_MUL"
"%~call __mulqq3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; "mulhq3" "muluhq3"
;; "mulha3" "muluha3"
(define_expand "mul<mode>3"
[(set (reg:ALL2QA 18)
(match_operand:ALL2QA 1 "register_operand" ""))
(set (reg:ALL2QA 26)
(match_operand:ALL2QA 2 "register_operand" ""))
;; "*mulhq3.call.enh"
(parallel [(set (reg:ALL2QA 24)
(mult:ALL2QA (reg:ALL2QA 18)
(reg:ALL2QA 26)))
(clobber (reg:HI 22))])
(set (match_operand:ALL2QA 0 "register_operand" "")
(reg:ALL2QA 24))]
"AVR_HAVE_MUL")
;; "*mulhq3.call" "*muluhq3.call"
;; "*mulha3.call" "*muluha3.call"
(define_insn "*mul<mode>3.call"
[(set (reg:ALL2QA 24)
(mult:ALL2QA (reg:ALL2QA 18)
(reg:ALL2QA 26)))
(clobber (reg:HI 22))]
"AVR_HAVE_MUL"
"%~call __mul<mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; On the enhanced core, don't clobber either input and use a separate output
;; "mulsa3" "mulusa3"
(define_expand "mul<mode>3"
[(set (reg:ALL4A 16)
(match_operand:ALL4A 1 "register_operand" ""))
(set (reg:ALL4A 20)
(match_operand:ALL4A 2 "register_operand" ""))
(set (reg:ALL4A 24)
(mult:ALL4A (reg:ALL4A 16)
(reg:ALL4A 20)))
(set (match_operand:ALL4A 0 "register_operand" "")
(reg:ALL4A 24))]
"AVR_HAVE_MUL")
;; "*mulsa3.call" "*mulusa3.call"
(define_insn "*mul<mode>3.call"
[(set (reg:ALL4A 24)
(mult:ALL4A (reg:ALL4A 16)
(reg:ALL4A 20)))]
"AVR_HAVE_MUL"
"%~call __mul<mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
; / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / /
; div
(define_code_iterator usdiv [udiv div])
;; "divqq3" "udivuqq3"
(define_expand "<code><mode>3"
[(set (reg:ALL1Q 25)
(match_operand:ALL1Q 1 "register_operand" ""))
(set (reg:ALL1Q 22)
(match_operand:ALL1Q 2 "register_operand" ""))
(parallel [(set (reg:ALL1Q 24)
(usdiv:ALL1Q (reg:ALL1Q 25)
(reg:ALL1Q 22)))
(clobber (reg:QI 25))])
(set (match_operand:ALL1Q 0 "register_operand" "")
(reg:ALL1Q 24))])
;; "*divqq3.call" "*udivuqq3.call"
(define_insn "*<code><mode>3.call"
[(set (reg:ALL1Q 24)
(usdiv:ALL1Q (reg:ALL1Q 25)
(reg:ALL1Q 22)))
(clobber (reg:QI 25))]
""
"%~call __<code><mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; "divhq3" "udivuhq3"
;; "divha3" "udivuha3"
(define_expand "<code><mode>3"
[(set (reg:ALL2QA 26)
(match_operand:ALL2QA 1 "register_operand" ""))
(set (reg:ALL2QA 22)
(match_operand:ALL2QA 2 "register_operand" ""))
(parallel [(set (reg:ALL2QA 24)
(usdiv:ALL2QA (reg:ALL2QA 26)
(reg:ALL2QA 22)))
(clobber (reg:HI 26))
(clobber (reg:QI 21))])
(set (match_operand:ALL2QA 0 "register_operand" "")
(reg:ALL2QA 24))])
;; "*divhq3.call" "*udivuhq3.call"
;; "*divha3.call" "*udivuha3.call"
(define_insn "*<code><mode>3.call"
[(set (reg:ALL2QA 24)
(usdiv:ALL2QA (reg:ALL2QA 26)
(reg:ALL2QA 22)))
(clobber (reg:HI 26))
(clobber (reg:QI 21))]
""
"%~call __<code><mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; Note the first parameter gets passed in already offset by 2 bytes
;; "divsa3" "udivusa3"
(define_expand "<code><mode>3"
[(set (reg:ALL4A 24)
(match_operand:ALL4A 1 "register_operand" ""))
(set (reg:ALL4A 18)
(match_operand:ALL4A 2 "register_operand" ""))
(parallel [(set (reg:ALL4A 22)
(usdiv:ALL4A (reg:ALL4A 24)
(reg:ALL4A 18)))
(clobber (reg:HI 26))
(clobber (reg:HI 30))])
(set (match_operand:ALL4A 0 "register_operand" "")
(reg:ALL4A 22))])
;; "*divsa3.call" "*udivusa3.call"
(define_insn "*<code><mode>3.call"
[(set (reg:ALL4A 22)
(usdiv:ALL4A (reg:ALL4A 24)
(reg:ALL4A 18)))
(clobber (reg:HI 26))
(clobber (reg:HI 30))]
""
"%~call __<code><mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;******************************************************************************
;** Rounding
;******************************************************************************
;; "roundqq3" "rounduqq3"
;; "roundhq3" "rounduhq3" "roundha3" "rounduha3"
;; "roundsq3" "roundusq3" "roundsa3" "roundusa3"
(define_expand "round<mode>3"
[(set (match_dup 4)
(match_operand:ALL124QA 1 "register_operand" ""))
(set (reg:QI 24)
(match_dup 5))
(parallel [(set (match_dup 3)
(unspec:ALL124QA [(match_dup 4)
(reg:QI 24)] UNSPEC_ROUND))
(clobber (match_dup 4))])
(set (match_operand:ALL124QA 0 "register_operand" "")
(match_dup 3))
(use (match_operand:HI 2 "nonmemory_operand" ""))]
""
{
if (CONST_INT_P (operands[2])
&& !(optimize_size
&& 4 == GET_MODE_SIZE (<MODE>mode)))
{
emit_insn (gen_round<mode>3_const (operands[0], operands[1], operands[2]));
DONE;
}
// Input and output of the libgcc function
const unsigned int regno_in[] = { -1, 22, 22, -1, 18 };
const unsigned int regno_out[] = { -1, 24, 24, -1, 22 };
operands[3] = gen_rtx_REG (<MODE>mode, regno_out[(size_t) GET_MODE_SIZE (<MODE>mode)]);
operands[4] = gen_rtx_REG (<MODE>mode, regno_in[(size_t) GET_MODE_SIZE (<MODE>mode)]);
operands[5] = simplify_gen_subreg (QImode, force_reg (HImode, operands[2]), HImode, 0);
// $2 is no more needed, but is referenced for expand.
operands[2] = const0_rtx;
})
;; Expand rounding with known rounding points inline so that the addend / mask
;; will be consumed by operation with immediate operands and there is no
;; need for a shift with variable offset.
;; "roundqq3_const" "rounduqq3_const"
;; "roundhq3_const" "rounduhq3_const" "roundha3_const" "rounduha3_const"
;; "roundsq3_const" "roundusq3_const" "roundsa3_const" "roundusa3_const"
(define_insn "round<mode>3_const"
[(set (match_operand:ALL124QA 0 "register_operand" "=d")
(unspec:ALL124QA [(match_operand:ALL124QA 1 "register_operand" "0")
(match_operand:HI 2 "const_int_operand" "n")
(const_int 0)]
UNSPEC_ROUND))]
""
{
return avr_out_round (insn, operands);
}
[(set_attr "cc" "clobber")
(set_attr "adjust_len" "round")])
;; "*roundqq3.libgcc" "*rounduqq3.libgcc"
(define_insn "*round<mode>3.libgcc"
[(set (reg:ALL1Q 24)
(unspec:ALL1Q [(reg:ALL1Q 22)
(reg:QI 24)] UNSPEC_ROUND))
(clobber (reg:ALL1Q 22))]
""
"%~call __round<mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; "*roundhq3.libgcc" "*rounduhq3.libgcc"
;; "*roundha3.libgcc" "*rounduha3.libgcc"
(define_insn "*round<mode>3.libgcc"
[(set (reg:ALL2QA 24)
(unspec:ALL2QA [(reg:ALL2QA 22)
(reg:QI 24)] UNSPEC_ROUND))
(clobber (reg:ALL2QA 22))]
""
"%~call __round<mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
;; "*roundsq3.libgcc" "*roundusq3.libgcc"
;; "*roundsa3.libgcc" "*roundusa3.libgcc"
(define_insn "*round<mode>3.libgcc"
[(set (reg:ALL4QA 22)
(unspec:ALL4QA [(reg:ALL4QA 18)
(reg:QI 24)] UNSPEC_ROUND))
(clobber (reg:ALL4QA 18))]
""
"%~call __round<mode>3"
[(set_attr "type" "xcall")
(set_attr "cc" "clobber")])
|
