From 8de858c039e88a7957458d6c21ec5545818d634d Mon Sep 17 00:00:00 2001 From: Michael Hayes Date: Thu, 1 Apr 1999 16:40:38 +0000 Subject: [PATCH] c4x.md (*db): Enable pattern if TARGET_LOOP_UNSIGNED is non-zero. * 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 --- gcc/ChangeLog | 10 +++++++++ gcc/config/c4x/c4x.md | 51 ++++++++++++++++++++++++++++++++----------- 2 files changed, 48 insertions(+), 13 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7b482c8447f..84a589e1d02 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,13 @@ +Fri Apr 2 12:19:17 1999 Michael Hayes + + * 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 * config/c4x/c4x.h: Added more comments. diff --git a/gcc/config/c4x/c4x.md b/gcc/config/c4x/c4x.md index 51cb0245408..6509941e4e2 100644 --- a/gcc/config/c4x/c4x.md +++ b/gcc/config/c4x/c4x.md @@ -4553,7 +4553,7 @@ (plus:QI (match_dup 0) (const_int -1))) (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) return \"dbu%#\\t%0,%l1\"; @@ -4705,8 +4705,8 @@ ; operand 4 is a scratch register (define_insn "movstrqi_small" - [(set (mem:BLK (match_operand:QI 0 "addr_reg_operand" "a")) - (mem:BLK (match_operand:QI 1 "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"))) (use (match_operand:QI 2 "immediate_operand" "i")) (use (match_operand:QI 3 "immediate_operand" "")) (clobber (match_operand:QI 4 "ext_low_reg_operand" "=&q")) @@ -4734,8 +4734,8 @@ [(set_attr "type" "multi")]) (define_insn "movstrqi_large" - [(set (mem:BLK (match_operand:QI 0 "addr_reg_operand" "a")) - (mem:BLK (match_operand:QI 1 "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"))) (use (match_operand:QI 2 "immediate_operand" "i")) (use (match_operand:QI 3 "immediate_operand" "")) (clobber (match_operand:QI 4 "ext_low_reg_operand" "=&q")) @@ -4804,8 +4804,8 @@ (define_insn "*cmpstrqi" [(set (match_operand:QI 0 "ext_reg_operand" "=d") - (compare:QI (mem:BLK (match_operand:QI 1 "addr_reg_operand" "a")) - (mem:BLK (match_operand:QI 2 "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")))) (use (match_operand:QI 3 "immediate_operand" "i")) (use (match_operand:QI 4 "immediate_operand" "")) (clobber (match_operand:QI 5 "std_reg_operand" "=&c")) @@ -5397,6 +5397,20 @@ "#" [(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 [(set (match_operand:HI 0 "src_operand" "") (match_operand:HI 1 "src_operand" ""))] @@ -5404,12 +5418,23 @@ && (reg_operand (operands[0], HImode) || reg_operand (operands[1], HImode) || stik_const_operand (operands[1], HImode))" - [(set (match_dup 2) (match_dup 3)) - (set (match_dup 4) (match_dup 5))] + [(set (match_dup 2) (match_dup 4)) + (set (match_dup 3) (match_dup 5))] "operands[2] = c4x_operand_subword (operands[0], 0, 1, HImode); - operands[3] = c4x_operand_subword (operands[1], 0, 1, HImode); - operands[4] = c4x_operand_subword (operands[0], 1, 1, HImode); - operands[5] = c4x_operand_subword (operands[1], 1, 1, HImode);") + operands[3] = 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); + 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" @@ -5737,7 +5762,7 @@ (match_operand:HI 2 "src_operand" ""))) (clobber (reg:CC 21))])] "" - "legitimize_operands (AND, operands, HImode);") + "legitimize_operands (XOR, operands, HImode);") (define_insn "*xorhi3_clobber" -- 2.30.2