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c4x.md (*db): Enable pattern if TARGET_LOOP_UNSIGNED is non-zero.

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* config/c4x/c4x.md (*db): Enable pattern if TARGET_LOOP_UNSIGNED
	is non-zero.
	(movstrqi_small, movstrqi_large, *cmpstrqi): Add + modifier to address
 	register constraints.
	(*movhi_clobber+1): Modify splitter pattern to handle destination
	register that is used in the source address.
	(*xorhi3_clobber): Replace AND with XOR in call to legitimize_operands.

From-SVN: r26108
This commit is contained in:
Michael Hayes 1999-04-01 16:40:38 +00:00 committed by Michael Hayes
parent 4adf744bb4
commit 8de858c039
2 changed files with 48 additions and 13 deletions
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10
gcc/ChangeLog
View File

@ -1,3 +1,13 @@
Fri Apr 2 12:19:17 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.md (*db): Enable pattern if TARGET_LOOP_UNSIGNED
is non-zero.
(movstrqi_small, movstrqi_large, *cmpstrqi): Add + modifier to address
register constraints.
(*movhi_clobber+1): Modify splitter pattern to handle destination
register that is used in the source address.
(*xorhi3_clobber): Replace AND with XOR in call to legitimize_operands.
Fri Apr 2 12:16:15 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz> Fri Apr 2 12:16:15 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.h: Added more comments. * config/c4x/c4x.h: Added more comments.

51
gcc/config/c4x/c4x.md
View File

@ -4553,7 +4553,7 @@
(plus:QI (match_dup 0) (plus:QI (match_dup 0)
(const_int -1))) (const_int -1)))
(clobber (reg:CC_NOOV 21))] (clobber (reg:CC_NOOV 21))]
"TARGET_DB && find_reg_note (insn, REG_NONNEG, 0)" "TARGET_DB && (find_reg_note (insn, REG_NONNEG, 0) || TARGET_LOOP_UNSIGNED)"
"* "*
if (which_alternative == 0) if (which_alternative == 0)
return \"dbu%#\\t%0,%l1\"; return \"dbu%#\\t%0,%l1\";
@ -4705,8 +4705,8 @@
; operand 4 is a scratch register ; operand 4 is a scratch register
(define_insn "movstrqi_small" (define_insn "movstrqi_small"
[(set (mem:BLK (match_operand:QI 0 "addr_reg_operand" "a")) [(set (mem:BLK (match_operand:QI 0 "addr_reg_operand" "+a"))
(mem:BLK (match_operand:QI 1 "addr_reg_operand" "a"))) (mem:BLK (match_operand:QI 1 "addr_reg_operand" "+a")))
(use (match_operand:QI 2 "immediate_operand" "i")) (use (match_operand:QI 2 "immediate_operand" "i"))
(use (match_operand:QI 3 "immediate_operand" "")) (use (match_operand:QI 3 "immediate_operand" ""))
(clobber (match_operand:QI 4 "ext_low_reg_operand" "=&q")) (clobber (match_operand:QI 4 "ext_low_reg_operand" "=&q"))
@ -4734,8 +4734,8 @@
[(set_attr "type" "multi")]) [(set_attr "type" "multi")])
(define_insn "movstrqi_large" (define_insn "movstrqi_large"
[(set (mem:BLK (match_operand:QI 0 "addr_reg_operand" "a")) [(set (mem:BLK (match_operand:QI 0 "addr_reg_operand" "+a"))
(mem:BLK (match_operand:QI 1 "addr_reg_operand" "a"))) (mem:BLK (match_operand:QI 1 "addr_reg_operand" "+a")))
(use (match_operand:QI 2 "immediate_operand" "i")) (use (match_operand:QI 2 "immediate_operand" "i"))
(use (match_operand:QI 3 "immediate_operand" "")) (use (match_operand:QI 3 "immediate_operand" ""))
(clobber (match_operand:QI 4 "ext_low_reg_operand" "=&q")) (clobber (match_operand:QI 4 "ext_low_reg_operand" "=&q"))
@ -4804,8 +4804,8 @@
(define_insn "*cmpstrqi" (define_insn "*cmpstrqi"
[(set (match_operand:QI 0 "ext_reg_operand" "=d") [(set (match_operand:QI 0 "ext_reg_operand" "=d")
(compare:QI (mem:BLK (match_operand:QI 1 "addr_reg_operand" "a")) (compare:QI (mem:BLK (match_operand:QI 1 "addr_reg_operand" "+a"))
(mem:BLK (match_operand:QI 2 "addr_reg_operand" "a")))) (mem:BLK (match_operand:QI 2 "addr_reg_operand" "+a"))))
(use (match_operand:QI 3 "immediate_operand" "i")) (use (match_operand:QI 3 "immediate_operand" "i"))
(use (match_operand:QI 4 "immediate_operand" "")) (use (match_operand:QI 4 "immediate_operand" ""))
(clobber (match_operand:QI 5 "std_reg_operand" "=&c")) (clobber (match_operand:QI 5 "std_reg_operand" "=&c"))
@ -5397,6 +5397,20 @@
"#" "#"
[(set_attr "type" "multi,multi")]) [(set_attr "type" "multi,multi")])
; This will fail miserably if the destination register is used in the
; source memory address.
; The usual strategy in this case is to swap the order of insns we emit,
; however, this will fail if we have an autoincrement memory address.
; For example:
; ldi *ar0++, ar0
; ldi *ar0++, ar1
;
; We could convert this to
; ldi *ar0(1), ar1
; ldi *ar0, ar0
;
; However, things are likely to be very screwed up if we get this.
(define_split (define_split
[(set (match_operand:HI 0 "src_operand" "") [(set (match_operand:HI 0 "src_operand" "")
(match_operand:HI 1 "src_operand" ""))] (match_operand:HI 1 "src_operand" ""))]
@ -5404,12 +5418,23 @@
&& (reg_operand (operands[0], HImode) && (reg_operand (operands[0], HImode)
|| reg_operand (operands[1], HImode) || reg_operand (operands[1], HImode)
|| stik_const_operand (operands[1], HImode))" || stik_const_operand (operands[1], HImode))"
[(set (match_dup 2) (match_dup 3)) [(set (match_dup 2) (match_dup 4))
(set (match_dup 4) (match_dup 5))] (set (match_dup 3) (match_dup 5))]
"operands[2] = c4x_operand_subword (operands[0], 0, 1, HImode); "operands[2] = c4x_operand_subword (operands[0], 0, 1, HImode);
operands[3] = c4x_operand_subword (operands[1], 0, 1, HImode); operands[3] = c4x_operand_subword (operands[0], 1, 1, HImode);
operands[4] = c4x_operand_subword (operands[0], 1, 1, HImode); operands[4] = c4x_operand_subword (operands[1], 0, 1, HImode);
operands[5] = c4x_operand_subword (operands[1], 1, 1, HImode);") operands[5] = c4x_operand_subword (operands[1], 1, 1, HImode);
if (reg_overlap_mentioned_p (operands[2], operands[5]))
{
/* Swap order of move insns. */
rtx tmp;
tmp = operands[2];
operands[2] =operands[3];
operands[3] = tmp;
tmp = operands[4];
operands[4] =operands[5];
operands[5] = tmp;
}")
(define_insn "extendqihi2" (define_insn "extendqihi2"
@ -5737,7 +5762,7 @@
(match_operand:HI 2 "src_operand" ""))) (match_operand:HI 2 "src_operand" "")))
(clobber (reg:CC 21))])] (clobber (reg:CC 21))])]
"" ""
"legitimize_operands (AND, operands, HImode);") "legitimize_operands (XOR, operands, HImode);")
(define_insn "*xorhi3_clobber" (define_insn "*xorhi3_clobber"