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hppa: Fix bug in atomic_storedi_1 pattern

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The first alternative stores the floating-point status register
in the destination.  It should store zero.  We need to copy %fr0
to another floating-point register to initialize it to zero.

2024-02-01  John David Anglin  <danglin@gcc.gnu.org>

gcc/ChangeLog:

	* config/pa/pa.md (atomic_storedi_1): Fix bug in
	alternative 1.
This commit is contained in:
John David Anglin 2024-02-01 18:46:47 +00:00
parent 3ba5be16a2
commit f26094751e
1 changed files with 3 additions and 3 deletions
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6
gcc/config/pa/pa.md
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@ -10723,13 +10723,13 @@ add,l %2,%3,%3\;bv,n %%r0(%3)"
(define_insn "atomic_storedi_1"
[(set (mem:DI (match_operand:SI 0 "register_operand" "r,r"))
(match_operand:DI 1 "reg_or_0_operand" "M,r"))
(clobber (match_scratch:DI 2 "=X,f"))]
(clobber (match_scratch:DI 2 "=f,f"))]
"!TARGET_64BIT && !TARGET_SOFT_FLOAT"
"@
{fstds|fstd} %%fr0,0(%0)
fcpy,dbl %%fr0,%2\n\t{fstds|fstd} %2,0(%0)
{stws|stw} %1,-16(%%sp)\n\t{stws|stw} %R1,-12(%%sp)\n\t{fldds|fldd} -16(%%sp),%2\n\t{fstds|fstd} %2,0(%0)"
[(set_attr "type" "move,move")
(set_attr "length" "4,16")])
(set_attr "length" "8,16")])
;; PA 2.0 hardware supports out-of-order execution of loads and stores, so
;; we need memory barriers to enforce program order for memory references