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| author | m.hayes <m.hayes@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-01-26 02:33:29 +0000 |
|---|---|---|
| committer | m.hayes <m.hayes@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-01-26 02:33:29 +0000 |
| commit | da7e2f82240b392e9a200fe925ca37b51862cb14 (patch) | |
| tree | 26b970f2bf4e614c87cce9c00f41529608de4ab1 /gcc/config/c4x/c4x.md | |
| parent | 02e19191a77b0f1918baa3a4ac7472c7ea4ea33f (diff) | |
| download | gcc-da7e2f82240b392e9a200fe925ca37b51862cb14.tar.gz | |
Tue Jan 26 23:21:49 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.h (COUNTER_REGS): New register class.
* config/c4x/c4x.md (*rptb_init): Change constraints.
(rptb_end): Emit alternate looping instructions if
RC register not allocated for loop counter.
(decrement_and_branch_on_count): Allow other registers
for loop counter.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@24868 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/c4x/c4x.md')
| -rw-r--r-- | gcc/config/c4x/c4x.md | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/gcc/config/c4x/c4x.md b/gcc/config/c4x/c4x.md index 60bc43fd99f..8e406cc28a0 100644 --- a/gcc/config/c4x/c4x.md +++ b/gcc/config/c4x/c4x.md @@ -4582,23 +4582,24 @@ ; This pattern needs to be emitted at the start of the loop to ; say that RS and RE are loaded. -(define_insn "init_branch_on_count" - [(unspec[(match_operand:QI 0 "rc_reg_operand" "v")] 22) +(define_insn "*rptb_init" + [(unspec[(match_operand:QI 0 "register_operand" "va")] 22) (clobber (reg:QI 25)) (clobber (reg:QI 26))] "" "" [(set_attr "type" "repeat")]) + ; The RS (25) and RE (26) registers must be unviolate from the top of the loop ; to here. (define_insn "rptb_end" [(set (pc) - (if_then_else (ge (match_operand:QI 2 "rc_reg_operand" "0,0,0,0,0") + (if_then_else (ge (match_operand:QI 0 "register_operand" "+v,?a,!*d,!*x*k,!m") (const_int 0)) (label_ref (match_operand 1 "" "")) (pc))) - (set (match_operand:QI 0 "rc_reg_operand" "+v,*a,*d,*x*k,*m") + (set (match_dup 0) (plus:QI (match_dup 0) (const_int -1))) (use (reg:QI 25)) @@ -4608,11 +4609,11 @@ "* if (which_alternative == 0) return c4x_rptb_nop_p (insn) ? \"nop\" : \"\"; - else if (which_alternative == 1) + else if (which_alternative == 1 && TARGET_DB) return \"dbu%#\\t%0,%l1\"; else if (which_alternative == 2) return c4x_output_cbranch (\"subi\\t1,%0\\n\\tbge\", insn); - else if (which_alternative == 3) + else if (which_alternative == 3 || (which_alternative == 1 && ! TARGET_DB)) return c4x_output_cbranch (\"subi\\t1,%0\\n\\tcmpi\\t0,%0\\n\\tbge\", insn); else return c4x_output_cbranch (\"push\\tr0\\n\\tldi\\t%0,r0\\n\\tsubi\\t1,r0\\n\\tsti\\tr0,%0\\n\\tpop\\tr0\\n\\tbhs\", insn); @@ -4622,7 +4623,7 @@ (define_expand "decrement_and_branch_on_count" [(parallel [(set (pc) - (if_then_else (ge (match_operand:QI 0 "rc_reg_operand" "") + (if_then_else (ge (match_operand:QI 0 "register_operand" "") (const_int 0)) (label_ref (match_operand 1 "" "")) (pc))) @@ -4633,8 +4634,15 @@ (use (reg:QI 26)) (clobber (reg:CC_NOOV 21))])] "" - "") - + "if (1) + { + /* 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; + }") (define_expand "movstrqi_small2" [(parallel [(set (mem:BLK (match_operand:BLK 0 "src_operand" "")) |