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c4x.md (decrement_and_branch_on_count): Disabled.

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* config/c4x/c4x.md (decrement_and_branch_on_count): Disabled.
	(doloop_begin, doloop_end): New patterns.
	(*rptb_init): Added extra operands.

From-SVN: r26939
This commit is contained in:
Michael Hayes 1999-05-14 19:16:36 +00:00 • committed by Michael Hayes
parent a017abecb9
commit 152d599762
2 changed files with 63 additions and 10 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Sat May 15 14:09:08 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.md (decrement_and_branch_on_count): Disabled.
(doloop_begin, doloop_end): New patterns.
(*rptb_init): Added extra operands.
Fri May 14 21:31:36 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.md (*umulqi3_highpart_clobber): Fix operand 2

67
gcc/config/c4x/c4x.md
View file

@ -4788,6 +4788,9 @@
; say that RS and RE are loaded.
(define_insn "*rptb_init"
[(unspec[(match_operand:QI 0 "register_operand" "va")] 22)
(use (match_operand:QI 1 "const_int_operand" ""))
(use (match_operand:QI 2 "const_int_operand" ""))
(use (match_operand:QI 3 "const_int_operand" ""))
(clobber (reg:QI 25))
(clobber (reg:QI 26))]
""
@ -4795,6 +4798,18 @@
[(set_attr "type" "repeat")])
(define_expand "doloop_begin"
[(parallel [(unspec[(match_operand:QI 0 "register_operand" "va")] 22)
(use (match_operand:QI 1 "const_int_operand" ""))
(use (match_operand:QI 2 "const_int_operand" ""))
(use (match_operand:QI 3 "const_int_operand" ""))
(clobber (reg:QI 25))
(clobber (reg:QI 26))])]
""
"if (INTVAL (operands[3]) > 1 || ! TARGET_RPTB)
FAIL;")
; The RS (25) and RE (26) registers must be unviolate from the top of the loop
; to here.
(define_insn "rptb_end"
@ -4806,6 +4821,9 @@
(set (match_dup 0)
(plus:QI (match_dup 0)
(const_int -1)))
(use (match_operand:QI 2 "const_int_operand" ""))
(use (match_operand:QI 3 "const_int_operand" ""))
(use (match_operand:QI 4 "const_int_operand" ""))
(use (reg:QI 25))
(use (reg:QI 26))
(clobber (reg:CC_NOOV 21))]
@ -4824,7 +4842,44 @@
"
[(set_attr "type" "repeat,db,jmpc,jmpc,jmpc")])
; operand 0 is the loop count register
; operand 1 is the label to jump to at the top of the loop
; operand 2 is the number of loop iterations or 0 if it is unknown
; operand 3 is the maximum number of loop iterations
; operand 4 is the number of levels of enclosed loops
(define_expand "doloop_end"
[(parallel [(set (pc)
(if_then_else (ge (match_operand:QI 0 "register_operand" "")
(const_int 0))
(label_ref (match_operand 1 "" ""))
(pc)))
(set (match_dup 0)
(plus:QI (match_dup 0)
(const_int -1)))
(use (match_operand:QI 2 "const_int_operand" ""))
(use (match_operand:QI 3 "const_int_operand" ""))
(use (match_operand:QI 4 "const_int_operand" ""))
(use (reg:QI 25))
(use (reg:QI 26))
(clobber (reg:CC_NOOV 21))])]
""
"if (! TARGET_LOOP_UNSIGNED
&& (unsigned HOST_WIDE_INT) INTVAL (operands[3]) > (1U << 31))
FAIL;
if (INTVAL (operands[4]) > 1 || ! TARGET_RPTB)
{
/* The C30 maximum iteration count for DB is 2^24. */
if (! TARGET_DB)
FAIL;
emit_insn (gen_decrement_and_branch_until_zero (operands[0],
operands[1]));
DONE;
}")
; The current low overhead looping code is naff and is not failsafe
; If you want RTPB instructions to be generated, apply the patches
; from www.elec.canterbury.ac.nz/c4x. This will utilise the
; doloop_begin and doloop_end patterns in this MD.
(define_expand "decrement_and_branch_on_count"
[(parallel [(set (pc)
(if_then_else (ge (match_operand:QI 0 "register_operand" "")
@ -4837,16 +4892,8 @@
(use (reg:QI 25))
(use (reg:QI 26))
(clobber (reg:CC_NOOV 21))])]
""
"if (0)
{
/* The C30 maximum iteration count for DB is 2^24. */
if (!TARGET_DB)
FAIL;
emit_insn (gen_decrement_and_branch_until_zero (operands[0],
operands[1]));
DONE;
}")
"0"
"")
(define_expand "movstrqi_small2"
[(parallel [(set (mem:BLK (match_operand:BLK 0 "src_operand" ""))