From: Ilya Leoshkevich <iii@linux.ibm.com>
To: gcc-patches@gcc.gnu.org
Cc: richard.guenther@gmail.com, richard.sandiford@arm.com,
segher@kernel.crashing.org, joseph@codesourcery.com,
krebbel@linux.ibm.com, rdapp@linux.ibm.com,
Ilya Leoshkevich <iii@linux.ibm.com>
Subject: [PATCH v3 4/9] S/390: Do not use signaling vector comparisons on z13
Date: Thu, 05 Sep 2019 11:11:00 -0000 [thread overview]
Message-ID: <20190905111019.8951-5-iii@linux.ibm.com> (raw)
In-Reply-To: <20190905111019.8951-1-iii@linux.ibm.com>
z13 supports only non-signaling vector comparisons. This means we
cannot vectorize LT, LE, GT, GE and LTGT when compiling for z13. Notify
middle-end about this using more restrictive operator predicate in
vcond<V_HW:mode><V_HW2:mode>.
gcc/ChangeLog:
2019-08-21 Ilya Leoshkevich <iii@linux.ibm.com>
PR target/77918
* config/s390/vector.md (vcond_comparison_operator): New
predicate.
(vcond<V_HW:mode><V_HW2:mode>): Use vcond_comparison_operator.
---
gcc/config/s390/vector.md | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/gcc/config/s390/vector.md b/gcc/config/s390/vector.md
index 0702e1de835..d7a266c5605 100644
--- a/gcc/config/s390/vector.md
+++ b/gcc/config/s390/vector.md
@@ -614,10 +614,30 @@
operands[2] = GEN_INT (GET_MODE_NUNITS (<MODE>mode) - 1);
})
+(define_predicate "vcond_comparison_operator"
+ (match_operand 0 "comparison_operator")
+{
+ if (!HONOR_NANS (GET_MODE (XEXP (op, 0)))
+ && !HONOR_NANS (GET_MODE (XEXP (op, 1))))
+ return true;
+ switch (GET_CODE (op))
+ {
+ case LE:
+ case LT:
+ case GE:
+ case GT:
+ case LTGT:
+ /* Signaling vector comparisons are supported only on z14+. */
+ return TARGET_Z14;
+ default:
+ return true;
+ }
+})
+
(define_expand "vcond<V_HW:mode><V_HW2:mode>"
[(set (match_operand:V_HW 0 "register_operand" "")
(if_then_else:V_HW
- (match_operator 3 "comparison_operator"
+ (match_operator 3 "vcond_comparison_operator"
[(match_operand:V_HW2 4 "register_operand" "")
(match_operand:V_HW2 5 "nonmemory_operand" "")])
(match_operand:V_HW 1 "nonmemory_operand" "")
--
2.21.0
next prev parent reply other threads:[~2019-09-05 11:11 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 11:10 [PATCH v3 0/9] S/390: Use signaling FP comparison instructions Ilya Leoshkevich
2019-09-05 11:10 ` [PATCH v3 1/9] Allow COND_EXPR and VEC_COND_EXPR condtions to trap Ilya Leoshkevich
2019-09-06 11:07 ` Richard Biener
2019-09-06 15:45 ` Ilya Leoshkevich
2019-09-09 8:43 ` Richard Biener
2019-09-05 11:11 ` [PATCH v3 5/9] S/390: Implement vcond expander for V1TI,V1TF Ilya Leoshkevich
2019-09-30 14:51 ` Andreas Krebbel
2019-09-05 11:11 ` [PATCH v3 6/9] S/390: Remove code duplication in vec_unordered<mode> Ilya Leoshkevich
2019-09-30 14:41 ` Andreas Krebbel
2019-09-05 11:11 ` Ilya Leoshkevich [this message]
2019-09-06 10:34 ` [PATCH v3 4/9] S/390: Do not use signaling vector comparisons on z13 Segher Boessenkool
2019-09-30 13:36 ` Ilya Leoshkevich
2019-10-01 0:24 ` Segher Boessenkool
2019-09-05 11:11 ` [PATCH v3 3/9] Introduce can_vector_compare_p function Ilya Leoshkevich
2019-09-06 12:58 ` Richard Sandiford
2019-09-05 11:11 ` [PATCH v3 2/9] Introduce rtx_alloca, alloca_raw_REG and alloca_rtx_fmt_* Ilya Leoshkevich
2019-09-06 11:09 ` Richard Biener
2019-09-06 12:40 ` Richard Sandiford
2019-09-30 15:00 ` Ilya Leoshkevich
2019-09-05 11:12 ` [PATCH v3 8/9] S/390: Use signaling FP comparison instructions Ilya Leoshkevich
2019-09-05 11:12 ` [PATCH v3 7/9] S/390: Remove code duplication in vec_* comparison expanders Ilya Leoshkevich
2019-09-30 14:50 ` Andreas Krebbel
2019-09-05 11:12 ` [PATCH v3 9/9] S/390: Test signaling FP comparison instructions Ilya Leoshkevich
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