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arm.md (tlobits_cbranch): New pattern. 

* arm.md (tlobits_cbranch): New pattern.
	* arm.h (arm_select_cc_mode): For thumb, only return CC_Nmode if
	testing a single bit.

From-SVN: r110803
This commit is contained in:
Richard Earnshaw 2006-02-09 15:18:10 +00:00 committed by Richard Earnshaw
parent 5230d88491
commit f9fa436385
3 changed files with 52 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2006-02-09 Richard Earnshaw <richard.earnshaw@arm.com>
* arm.md (tlobits_cbranch): New pattern.
* arm.h (arm_select_cc_mode): For thumb, only return CC_Nmode if
testing a single bit.
2006-02-09 Andrew Pinski <pinskia@physics.uc.edu>
PR tree-opt/26179

3
gcc/config/arm/arm.c
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@ -6748,7 +6748,8 @@ arm_select_cc_mode (enum rtx_code op, rtx x, rtx y)
if (TARGET_THUMB
&& GET_MODE (x) == SImode
&& (op == EQ || op == NE)
&& (GET_CODE (x) == ZERO_EXTRACT))
&& GET_CODE (x) == ZERO_EXTRACT
&& XEXP (x, 1) == const1_rtx)
return CC_Nmode;
/* An operation that sets the condition codes as a side-effect, the

44
gcc/config/arm/arm.md
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@ -6028,6 +6028,50 @@
(const_int 8))))]
)
(define_insn "*tlobits_cbranch"
[(set (pc)
(if_then_else
(match_operator 0 "equality_operator"
[(zero_extract:SI (match_operand:SI 1 "s_register_operand" "l")
(match_operand:SI 2 "const_int_operand" "i")
(const_int 0))
(const_int 0)])
(label_ref (match_operand 3 "" ""))
(pc)))
(clobber (match_scratch:SI 4 "=l"))]
"TARGET_THUMB"
"*
{
rtx op[3];
op[0] = operands[4];
op[1] = operands[1];
op[2] = GEN_INT (32 - INTVAL (operands[2]));
output_asm_insn (\"lsl\\t%0, %1, %2\", op);
switch (get_attr_length (insn))
{
case 4: return \"b%d0\\t%l3\";
case 6: return \"b%D0\\t.LCB%=\;b\\t%l3\\t%@long jump\\n.LCB%=:\";
default: return \"b%D0\\t.LCB%=\;bl\\t%l3\\t%@far jump\\n.LCB%=:\";
}
}"
[(set (attr "far_jump")
(if_then_else
(eq_attr "length" "8")
(const_string "yes")
(const_string "no")))
(set (attr "length")
(if_then_else
(and (ge (minus (match_dup 3) (pc)) (const_int -250))
(le (minus (match_dup 3) (pc)) (const_int 256)))
(const_int 4)
(if_then_else
(and (ge (minus (match_dup 3) (pc)) (const_int -2040))
(le (minus (match_dup 3) (pc)) (const_int 2048)))
(const_int 6)
(const_int 8))))]
)
(define_insn "*tstsi3_cbranch"
[(set (pc)
(if_then_else