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From 22228d8ba86c70381f7c34c22ac6994234d0f3e7 Mon Sep 17 00:00:00 2001
From: xguo <xguo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 9 Aug 2013 06:59:01 +0000
Subject: [PATCH] gcc/ChangeLog:
Backport from mainline:
2013-08-09 Zhenqiang Chen <zhenqiang.chen@linaro.org>
* config/arm/neon.md (vcond): Fix floating-point vector
comparisons against 0.
gcc/testsuite/ChangeLog:
Backport from mainline:
2013-08-09 Zhenqiang Chen <zhenqiang.chen@linaro.org>
* gcc.target/arm/lp1189445.c: New testcase.
Upstream-Status: Backport from 4.8.2
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
More details in:
http://gcc.1065356.n5.nabble.com/PATCH-ARM-Fix-unrecognizable-vector-comparisons-td947064.html
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_8-branch@201620 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog | 8 ++++++++
gcc/config/arm/neon.md | 34 +++++++++++++++++++++++++++-----
gcc/testsuite/ChangeLog | 7 +++++++
gcc/testsuite/gcc.target/arm/lp1189445.c | 18 +++++++++++++++++
4 files changed, 62 insertions(+), 5 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/arm/lp1189445.c
diff --git a/gcc/config/arm/neon.md b/gcc/config/arm/neon.md
index d8d4202..86a5932 100644
--- a/gcc/config/arm/neon.md
+++ b/gcc/config/arm/neon.md
@@ -1732,6 +1732,7 @@
? 3 : 1;
rtx magic_rtx = GEN_INT (magic_word);
int inverse = 0;
+ int use_zero_form = 0;
int swap_bsl_operands = 0;
rtx mask = gen_reg_rtx (<V_cmp_result>mode);
rtx tmp = gen_reg_rtx (<V_cmp_result>mode);
@@ -1742,12 +1743,16 @@
switch (GET_CODE (operands[3]))
{
case GE:
+ case GT:
case LE:
+ case LT:
case EQ:
- if (!REG_P (operands[5])
- && (operands[5] != CONST0_RTX (<MODE>mode)))
- operands[5] = force_reg (<MODE>mode, operands[5]);
- break;
+ if (operands[5] == CONST0_RTX (<MODE>mode))
+ {
+ use_zero_form = 1;
+ break;
+ }
+ /* Fall through. */
default:
if (!REG_P (operands[5]))
operands[5] = force_reg (<MODE>mode, operands[5]);
@@ -1798,7 +1803,26 @@
a GT b -> a GT b
a LE b -> b GE a
a LT b -> b GT a
- a EQ b -> a EQ b */
+ a EQ b -> a EQ b
+ Note that there also exist direct comparison against 0 forms,
+ so catch those as a special case. */
+ if (use_zero_form)
+ {
+ inverse = 0;
+ switch (GET_CODE (operands[3]))
+ {
+ case LT:
+ base_comparison = gen_neon_vclt<mode>;
+ break;
+ case LE:
+ base_comparison = gen_neon_vcle<mode>;
+ break;
+ default:
+ /* Do nothing, other zero form cases already have the correct
+ base_comparison. */
+ break;
+ }
+ }
if (!inverse)
emit_insn (base_comparison (mask, operands[4], operands[5], magic_rtx));
diff --git a/gcc/testsuite/gcc.target/arm/lp1189445.c b/gcc/testsuite/gcc.target/arm/lp1189445.c
new file mode 100644
index 0000000..766748e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/lp1189445.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target arm_neon } */
+/* { dg-add-options arm_neon } */
+/* { dg-options "-O3" } */
+
+int id;
+int
+test (const long int *data)
+{
+ int i, retval;
+ retval = id;
+ for (i = 0; i < id; i++)
+ {
+ retval &= (data[i] <= 0);
+ }
+
+ return (retval);
+}
--
2.0.0
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