diff options
author | Georg-Johann Lay <avr@gjlay.de> | 2016-07-15 16:25:38 +0000 |
---|---|---|
committer | Georg-Johann Lay <gjl@gcc.gnu.org> | 2016-07-15 16:25:38 +0000 |
commit | be88b0c7819ecf82f4020ab037cba99c5b0e99ad (patch) | |
tree | bcd5d773d7bef7e04623303af8ec0ccb16ada3e8 /gcc/config | |
parent | 5eed9a887bb0bcccc6d8298609423bf917932964 (diff) | |
download | gcc-be88b0c7819ecf82f4020ab037cba99c5b0e99ad.zip gcc-be88b0c7819ecf82f4020ab037cba99c5b0e99ad.tar.gz gcc-be88b0c7819ecf82f4020ab037cba99c5b0e99ad.tar.bz2 |
predicates.md (const_m255_to_m1_operand): New.
* config/avr/predicates.md (const_m255_to_m1_operand): New.
* config/avr/constraints.md (Cn8, Ca1, Co1, Yx2): New constraints.
* config/avr/avr.md (add<mode>3) <ALL1>: Make "r,0,r" more
expensive.
(*cmphi.zero-extend.0, *cmphi.zero-extend.1)
(*usum_widenqihi3, *udiff_widenqihi3)
(*addhi3_zero_extend.const): New combiner insns.
(andqi3, iorqi3): Provide "l" (NO_LD_REGS) alternative if
just 1 bit is affected.
* config/avr/avr.c (avr_out_bitop) <QImode>: Don't access xop[3].
(avr_out_compare) [EQ,NE]: Tweak comparing d-regs against -1.
From-SVN: r238381
Diffstat (limited to 'gcc/config')
-rw-r--r-- | gcc/config/avr/avr.c | 32 | ||||
-rw-r--r-- | gcc/config/avr/avr.md | 74 | ||||
-rw-r--r-- | gcc/config/avr/constraints.md | 21 | ||||
-rw-r--r-- | gcc/config/avr/predicates.md | 5 |
4 files changed, 117 insertions, 15 deletions
diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index 7371f29..2c0d884 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -5346,6 +5346,34 @@ avr_out_compare (rtx_insn *insn, rtx *xop, int *plen) } } + /* Comparisons == -1 and != -1 of a d-register that's used after the + comparison. (If it's unused after we use CPI / SBCI or ADIW sequence + from below.) Instead of CPI Rlo,-1 / LDI Rx,-1 / CPC Rhi,Rx we can + use CPI Rlo,-1 / CPC Rhi,Rlo which is 1 instruction shorter: + If CPI is true then Rlo contains -1 and we can use Rlo instead of Rx + when CPC'ing the high part. If CPI is false then CPC cannot render + the result to true. This also works for the more generic case where + the constant is of the form 0xabab. */ + + if (n_bytes == 2 + && xval != 0 + && test_hard_reg_class (LD_REGS, xreg) + && compare_eq_p (insn) + && !reg_unused_after (insn, xreg)) + { + rtx xlo8 = simplify_gen_subreg (QImode, xval, mode, 0); + rtx xhi8 = simplify_gen_subreg (QImode, xval, mode, 1); + + if (INTVAL (xlo8) == INTVAL (xhi8)) + { + xop[0] = xreg; + xop[1] = xlo8; + + return avr_asm_len ("cpi %A0,%1" CR_TAB + "cpc %B0,%A0", xop, plen, 2); + } + } + for (i = 0; i < n_bytes; i++) { /* We compare byte-wise. */ @@ -7687,11 +7715,11 @@ avr_out_bitop (rtx insn, rtx *xop, int *plen) /* op[0]: 8-bit destination register op[1]: 8-bit const int - op[2]: 8-bit clobber register or SCRATCH + op[2]: 8-bit clobber register, SCRATCH or NULL_RTX. op[3]: 8-bit register containing 0xff or NULL_RTX */ rtx op[4]; - op[2] = xop[3]; + op[2] = QImode == mode ? NULL_RTX : xop[3]; op[3] = NULL_RTX; if (plen) diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md index 98951865..13c5373 100644 --- a/gcc/config/avr/avr.md +++ b/gcc/config/avr/avr.md @@ -1175,7 +1175,7 @@ inc %0\;inc %0 dec %0\;dec %0" [(set_attr "length" "1,1,1,1,2,2") - (set_attr "cc" "set_czn,set_czn,set_vzn,set_vzn,set_vzn,set_vzn")]) + (set_attr "cc" "set_czn,set_czn,set_vzn,set_vzn,set_zn,set_zn")]) ;; "addhi3" ;; "addhq3" "adduhq3" @@ -1240,6 +1240,33 @@ [(set_attr "length" "5") (set_attr "cc" "clobber")]) +(define_insn "*addhi3_zero_extend.const" + [(set (match_operand:HI 0 "register_operand" "=d") + (plus:HI (zero_extend:HI (match_operand:QI 1 "register_operand" "0")) + (match_operand:HI 2 "const_m255_to_m1_operand" "Cn8")))] + "" + "subi %A0,%n2\;sbc %B0,%B0" + [(set_attr "length" "2") + (set_attr "cc" "set_czn")]) + +(define_insn "*usum_widenqihi3" + [(set (match_operand:HI 0 "register_operand" "=r") + (plus:HI (zero_extend:HI (match_operand:QI 1 "register_operand" "0")) + (zero_extend:HI (match_operand:QI 2 "register_operand" "r"))))] + "" + "add %A0,%2\;clr %B0\;rol %B0" + [(set_attr "length" "3") + (set_attr "cc" "clobber")]) + +(define_insn "*udiff_widenqihi3" + [(set (match_operand:HI 0 "register_operand" "=r") + (minus:HI (zero_extend:HI (match_operand:QI 1 "register_operand" "0")) + (zero_extend:HI (match_operand:QI 2 "register_operand" "r"))))] + "" + "sub %A0,%2\;sbc %B0,%B0" + [(set_attr "length" "2") + (set_attr "cc" "set_czn")]) + (define_insn "*addhi3_sp" [(set (match_operand:HI 1 "stack_register_operand" "=q") (plus:HI (match_operand:HI 2 "stack_register_operand" "q") @@ -3102,15 +3129,16 @@ ; and (define_insn "andqi3" - [(set (match_operand:QI 0 "register_operand" "=??r,d") - (and:QI (match_operand:QI 1 "register_operand" "%0,0") - (match_operand:QI 2 "nonmemory_operand" "r,i")))] + [(set (match_operand:QI 0 "register_operand" "=??r,d,*l") + (and:QI (match_operand:QI 1 "register_operand" "%0,0,0") + (match_operand:QI 2 "nonmemory_operand" "r,i,Ca1")))] "" "@ and %0,%2 - andi %0,lo8(%2)" - [(set_attr "length" "1,1") - (set_attr "cc" "set_zn,set_zn")]) + andi %0,lo8(%2) + * return avr_out_bitop (insn, operands, NULL);" + [(set_attr "length" "1,1,2") + (set_attr "cc" "set_zn,set_zn,none")]) (define_insn "andhi3" [(set (match_operand:HI 0 "register_operand" "=??r,d,d,r ,r") @@ -3184,15 +3212,16 @@ ;; ior (define_insn "iorqi3" - [(set (match_operand:QI 0 "register_operand" "=??r,d") - (ior:QI (match_operand:QI 1 "register_operand" "%0,0") - (match_operand:QI 2 "nonmemory_operand" "r,i")))] + [(set (match_operand:QI 0 "register_operand" "=??r,d,*l") + (ior:QI (match_operand:QI 1 "register_operand" "%0,0,0") + (match_operand:QI 2 "nonmemory_operand" "r,i,Co1")))] "" "@ or %0,%2 - ori %0,lo8(%2)" - [(set_attr "length" "1,1") - (set_attr "cc" "set_zn,set_zn")]) + ori %0,lo8(%2) + * return avr_out_bitop (insn, operands, NULL);" + [(set_attr "length" "1,1,2") + (set_attr "cc" "set_zn,set_zn,none")]) (define_insn "iorhi3" [(set (match_operand:HI 0 "register_operand" "=??r,d,d,r ,r") @@ -4607,6 +4636,25 @@ [(set_attr "cc" "compare") (set_attr "length" "1")]) + +(define_insn "*cmphi.zero-extend.0" + [(set (cc0) + (compare (zero_extend:HI (match_operand:QI 0 "register_operand" "r")) + (match_operand:HI 1 "register_operand" "r")))] + "" + "cp %0,%A1\;cpc __zero_reg__,%B1" + [(set_attr "cc" "compare") + (set_attr "length" "2")]) + +(define_insn "*cmphi.zero-extend.1" + [(set (cc0) + (compare (match_operand:HI 0 "register_operand" "r") + (zero_extend:HI (match_operand:QI 1 "register_operand" "r"))))] + "" + "cp %A0,%1\;cpc %B0,__zero_reg__" + [(set_attr "cc" "compare") + (set_attr "length" "2")]) + ;; "*cmphi" ;; "*cmphq" "*cmpuhq" ;; "*cmpha" "*cmpuha" diff --git a/gcc/config/avr/constraints.md b/gcc/config/avr/constraints.md index 0c25592..80cff0c 100644 --- a/gcc/config/avr/constraints.md +++ b/gcc/config/avr/constraints.md @@ -133,6 +133,11 @@ (and (match_code "const_int") (match_test "ival == 7"))) +(define_constraint "Ca1" + "Constant 1-byte integer that allows AND by means of CLT + BLD." + (and (match_code "const_int") + (match_test "avr_popcount_each_byte (op, 1, 1<<7)"))) + (define_constraint "Ca2" "Constant 2-byte integer that allows AND without clobber register." (and (match_code "const_int") @@ -148,6 +153,11 @@ (and (match_code "const_int") (match_test "avr_popcount_each_byte (op, 4, (1<<0) | (1<<7) | (1<<8))"))) +(define_constraint "Co1" + "Constant 1-byte integer that allows AND by means of SET + BLD." + (and (match_code "const_int") + (match_test "avr_popcount_each_byte (op, 1, 1<<1)"))) + (define_constraint "Co2" "Constant 2-byte integer that allows OR without clobber register." (and (match_code "const_int") @@ -193,6 +203,11 @@ (and (match_code "const_int") (match_test "!avr_has_nibble_0xf (op)"))) +(define_constraint "Cn8" + "A negative constant integer in the range @minus{}255 @dots{} @minus{}1." + (and (match_code "const_int") + (match_test "IN_RANGE (ival, -255, -1)"))) + ;; CONST_FIXED is no element of 'n' so cook our own. ;; "i" or "s" would match but because the insn uses iterators that cover ;; INT_MODE, "i" or "s" is not always possible. @@ -230,6 +245,12 @@ (match_test "-2 == INTVAL (avr_to_int_mode (op))")) (match_test "satisfies_constraint_Cm2 (op)"))) +(define_constraint "Yx2" + "Fixed-point or integer constant not in the range @minus{}2 @dots{} 2" + (and (ior (match_code "const_int") + (match_code "const_fixed")) + (match_test "!IN_RANGE (INTVAL (avr_to_int_mode (op)), -2, 2)"))) + ;; Similar to "IJ" used with ADIW/SBIW, but for CONST_FIXED. (define_constraint "YIJ" diff --git a/gcc/config/avr/predicates.md b/gcc/config/avr/predicates.md index 4570656..c7d3a24 100644 --- a/gcc/config/avr/predicates.md +++ b/gcc/config/avr/predicates.md @@ -114,6 +114,11 @@ (and (match_code "const_int") (match_test "IN_RANGE (INTVAL (op), 2, 6)"))) +;; Return 1 if OP is constant integer -255..-1. +(define_predicate "const_m255_to_m1_operand" + (and (match_code "const_int") + (match_test "IN_RANGE (INTVAL (op), -255, -1)"))) + ;; Returns true if OP is either the constant zero or a register. (define_predicate "reg_or_0_operand" (ior (match_operand 0 "register_operand") |