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c4x.md (rptb_init): Renamed from *rptb_init.

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Sat Sep  4 16:56:28 1999  Michael Hayes  <m.hayes@elec.canterbury.ac.nz>

	* config/c4x/c4x.md (rptb_init): Renamed from *rptb_init.
	(doloop_begin):  Simplify pattern and use emit_jump_insn.
	(doloop_end): Simplify pattern, switch operand order,
	and use emit_jump_insn.

From-SVN: r29098
This commit is contained in:
Michael Hayes 1999-09-04 05:13:53 +00:00 • committed by Michael Hayes
parent edf5013023
commit f0cae6c755
2 changed files with 38 additions and 38 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
Sat Sep 4 16:56:28 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.md (rptb_init): Renamed from *rptb_init.
(doloop_begin): Simplify pattern and use emit_jump_insn.
(doloop_end): Simplify pattern, switch operand order,
and use emit_jump_insn.
Fri Sep 3 19:02:38 1999 Bernd Schmidt <crux@pool.informatik.rwth-aachen.de>
* function.h (struct function): Add new element LANGUAGE.

69
gcc/config/c4x/c4x.md
View file

@ -4929,11 +4929,8 @@
; This pattern needs to be emitted at the start of the loop to
; say that RS and RE are loaded.
(define_insn "*rptb_init"
(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))]
""
@ -4941,16 +4938,21 @@
[(set_attr "type" "repeat")])
; operand 0 is the loop count pseudo register
; operand 1 is the number of loop iterations or 0 if it is unknown
; operand 2 is the maximum number of loop iterations
; operand 3 is the number of levels of enclosed loops
(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))])]
[(use (match_operand 0 "register_operand" ""))
(use (match_operand:QI 1 "const_int_operand" ""))
(use (match_operand:QI 2 "const_int_operand" ""))
(use (match_operand:QI 3 "const_int_operand" ""))]
""
"if (INTVAL (operands[3]) > 1 || ! TARGET_RPTB)
FAIL;")
FAIL;
emit_jump_insn (gen_rptb_init (operands[0]));
DONE;
")
; The RS (25) and RE (26) registers must be unviolate from the top of the loop
@ -4964,9 +4966,6 @@
(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))]
@ -4985,39 +4984,33 @@
"
[(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
; operand 0 is the loop count pseudo register
; operand 1 is the number of loop iterations or 0 if it is unknown
; operand 2 is the maximum number of loop iterations
; operand 3 is the number of levels of enclosed loops
; operand 4 is the label to jump to at the top of the loop
(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))])]
[(use (match_operand 0 "register_operand" ""))
(use (match_operand:QI 1 "const_int_operand" ""))
(use (match_operand:QI 2 "const_int_operand" ""))
(use (match_operand:QI 3 "const_int_operand" ""))
(use (label_ref (match_operand 4 "" "")))]
""
"if (! TARGET_LOOP_UNSIGNED
&& (unsigned HOST_WIDE_INT) INTVAL (operands[3]) > (1U << 31))
&& (unsigned HOST_WIDE_INT) INTVAL (operands[2]) > (1U << 31))
FAIL;
if (INTVAL (operands[4]) > 1 || ! TARGET_RPTB)
if (INTVAL (operands[3]) > 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]));
emit_jump_insn (gen_decrement_and_branch_until_zero (operands[0],
operands[4]));
DONE;
}")
}
emit_jump_insn (gen_rptb_end (operands[0], operands[4]));
DONE;
")
; The current low overhead looping code is naff and is not failsafe
; If you want RTPB instructions to be generated, apply the patches