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riscv-gcc-1
Commit adcd8f77 by Marek Michalkiewicz Committed by Denis Chertykov
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avr.c (ashlhi3_out, [...]): Optimize more cases with known shift count. 

	* config/avr/avr.c (ashlhi3_out, ashlsi3_out, ashrhi3_out,
	ashrsi3_out, lshrhi3_out, lshrsi3_out): Optimize more cases
	with known shift count.
	* config/avr/avr.md (ashlsi3, ashrsi3, lshrsi3):
	New alternative for shift count 2 with no scratch register.
	(ashlhi3, ashlsi3): Change "cc" attribute from "clobber" to
	"set_n" for shift counts 1 and 2.

From-SVN: r36685
parent e1defe10
Showing with 348 additions and 46 deletions
gcc/ChangeLog
2000-09-30 Marek Michalkiewicz <marekm@linux.org.pl>
* config/avr/avr.c (ashlhi3_out, ashlsi3_out, ashrhi3_out,
ashrsi3_out, lshrhi3_out, lshrsi3_out): Optimize more cases
with known shift count.
* config/avr/avr.md (ashlsi3, ashrsi3, lshrsi3):
New alternative for shift count 2 with no scratch register.
(ashlhi3, ashlsi3): Change "cc" attribute from "clobber" to
"set_n" for shift counts 1 and 2.
2000-09-30 Geoff Keating <geoffk@cygnus.com>
* config/rs6000/rs6000.md (movsi_to_cr): Remove the USE. Calculate
......
gcc/config/avr/avr.md
......@@ -893,19 +893,19 @@
(match_operand:QI 2 "general_operand" "r,P,O,K,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,X,&d,X"))]
""
"* return ashlhi3_out (insn,operands, NULL);"
"* return ashlhi3_out (insn, operands, NULL);"
[(set_attr "length" "7,2,4,2,5,8")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber,clobber")])
(set_attr "cc" "clobber,set_n,clobber,set_n,clobber,clobber")])
(define_insn "ashlsi3"
[(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r")
(ashift:SI (match_operand:SI 1 "register_operand" "0,0,r,0,0")
(match_operand:QI 2 "general_operand" "r,P,O,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,&d,X"))]
[(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r,r")
(ashift:SI (match_operand:SI 1 "register_operand" "0,0,r,0,0,0")
(match_operand:QI 2 "general_operand" "r,P,O,K,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,X,&d,X"))]
""
"* return ashlsi3_out (insn,operands, NULL);"
[(set_attr "length" "9,4,4,7,10")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber")])
"* return ashlsi3_out (insn, operands, NULL);"
[(set_attr "length" "9,4,4,8,7,10")
(set_attr "cc" "clobber,set_n,clobber,set_n,clobber,clobber")])
;; >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >>
;; arithmetic shift right
......@@ -925,19 +925,19 @@
(match_operand:QI 2 "general_operand" "r,P,K,O,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,X,&d,X"))]
""
"* return ashrhi3_out (insn,operands, NULL);"
"* return ashrhi3_out (insn, operands, NULL);"
[(set_attr "length" "7,2,4,2,5,8")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber,clobber")])
(define_insn "ashrsi3"
[(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r")
(ashiftrt:SI (match_operand:SI 1 "register_operand" "0,0,r,0,0")
(match_operand:QI 2 "general_operand" "r,P,O,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,&d,X"))]
[(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r,r")
(ashiftrt:SI (match_operand:SI 1 "register_operand" "0,0,r,0,0,0")
(match_operand:QI 2 "general_operand" "r,P,O,K,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,X,&d,X"))]
""
"* return ashrsi3_out (insn,operands, NULL);"
[(set_attr "length" "9,4,6,7,10")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber")])
"* return ashrsi3_out (insn, operands, NULL);"
[(set_attr "length" "9,4,6,8,7,10")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber,clobber")])
;; >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >>
;; logical shift right
......@@ -947,7 +947,7 @@
(lshiftrt:QI (match_operand:QI 1 "register_operand" "0,0,0,0")
(match_operand:QI 2 "general_operand" "r,n,n,Qm")))]
""
"* return lshrqi3_out (insn,operands, NULL);"
"* return lshrqi3_out (insn, operands, NULL);"
[(set_attr "length" "6,4,6,7")
(set_attr "cc" "clobber,set_czn,set_czn,clobber")])
......@@ -957,19 +957,19 @@
(match_operand:QI 2 "general_operand" "r,P,K,O,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,X,&d,X"))]
""
"* return lshrhi3_out (insn,operands, NULL);"
"* return lshrhi3_out (insn, operands, NULL);"
[(set_attr "length" "7,2,4,2,5,8")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber,clobber")])
(define_insn "lshrsi3"
[(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r")
(lshiftrt:SI (match_operand:SI 1 "register_operand" "0,0,r,0,0")
(match_operand:QI 2 "general_operand" "r,P,O,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,&d,X"))]
""
"* return lshrsi3_out (insn,operands, NULL);"
[(set_attr "length" "9,4,4,7,10")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber")])
[(set (match_operand:SI 0 "register_operand" "=r,r,r,r,r,r")
(lshiftrt:SI (match_operand:SI 1 "register_operand" "0,0,r,0,0,0")
(match_operand:QI 2 "general_operand" "r,P,O,K,i,Qm")))
(clobber (match_scratch:QI 3 "=X,X,X,X,&d,X"))]
""
"* return lshrsi3_out (insn, operands, NULL);"
[(set_attr "length" "9,4,4,8,7,10")
(set_attr "cc" "clobber,clobber,clobber,clobber,clobber,clobber")])
;; abs(x) abs(x) abs(x) abs(x) abs(x) abs(x) abs(x) abs(x) abs(x) abs(x) abs(x)
;; abs
......
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