https://gcc.gnu.org/g:f5962839d6e0c3115931e68d938d9a0cd7a383b1
commit r15-5027-gf5962839d6e0c3115931e68d938d9a0cd7a383b1
Author: Richard Sandiford <richard.sandif...@arm.com>
Date: Thu Nov 7 20:34:48 2024 +0000
aarch64: Restrict FCLAMP to SME2
There are two sets of patterns for FCLAMP: one set for single registers
and one set for multiple registers. The multiple-register set was
correctly gated on SME2, but the single-register set only required SME.
This doesn't matter for ACLE usage, since the intrinsic definitions
are correctly gated. But it does matter for automatic generation of
FCLAMP from separate minimum and maximum operations (either ACLE
intrinsics or autovectorised code).
gcc/
* config/aarch64/aarch64-sve2.md (@aarch64_sve_fclamp<mode>)
(*aarch64_sve_fclamp<mode>_x): Require TARGET_STREAMING_SME2
rather than TARGET_STREAMING_SME.
gcc/testsuite/
* gcc.target/aarch64/sme/clamp_3.c: Force sme2
* gcc.target/aarch64/sme/clamp_4.c: Likewise.
* gcc.target/aarch64/sme/clamp_5.c: New test.
Diff:
---
gcc/config/aarch64/aarch64-sve2.md | 4 ++--
gcc/testsuite/gcc.target/aarch64/sme/clamp_3.c | 2 ++
gcc/testsuite/gcc.target/aarch64/sme/clamp_4.c | 2 ++
gcc/testsuite/gcc.target/aarch64/sme/clamp_5.c | 24 ++++++++++++++++++++++++
4 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/gcc/config/aarch64/aarch64-sve2.md
b/gcc/config/aarch64/aarch64-sve2.md
index 8047f405a17c..08f83fc7ca07 100644
--- a/gcc/config/aarch64/aarch64-sve2.md
+++ b/gcc/config/aarch64/aarch64-sve2.md
@@ -1117,7 +1117,7 @@
UNSPEC_FMAXNM)
(match_operand:SVE_FULL_F 3 "register_operand")]
UNSPEC_FMINNM))]
- "TARGET_STREAMING_SME"
+ "TARGET_STREAMING_SME2"
{@ [cons: =0, 1, 2, 3; attrs: movprfx]
[ w, %0, w, w; * ] fclamp\t%0.<Vetype>, %2.<Vetype>,
%3.<Vetype>
[ ?&w, w, w, w; yes ] movprfx\t%0,
%1\;fclamp\t%0.<Vetype>, %2.<Vetype>, %3.<Vetype>
@@ -1137,7 +1137,7 @@
UNSPEC_COND_FMAXNM)
(match_operand:SVE_FULL_F 3 "register_operand")]
UNSPEC_COND_FMINNM))]
- "TARGET_STREAMING_SME"
+ "TARGET_STREAMING_SME2"
{@ [cons: =0, 1, 2, 3; attrs: movprfx]
[ w, %0, w, w; * ] #
[ ?&w, w, w, w; yes ] #
diff --git a/gcc/testsuite/gcc.target/aarch64/sme/clamp_3.c
b/gcc/testsuite/gcc.target/aarch64/sme/clamp_3.c
index 44959f794909..162de6224d58 100644
--- a/gcc/testsuite/gcc.target/aarch64/sme/clamp_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/sme/clamp_3.c
@@ -2,6 +2,8 @@
#include <arm_sme.h>
+#pragma GCC target "+sme2"
+
#define TEST(TYPE) \
TYPE \
tied1_##TYPE(TYPE a, TYPE b, TYPE c) __arm_streaming \
diff --git a/gcc/testsuite/gcc.target/aarch64/sme/clamp_4.c
b/gcc/testsuite/gcc.target/aarch64/sme/clamp_4.c
index 643b2635b90e..453c82cd8605 100644
--- a/gcc/testsuite/gcc.target/aarch64/sme/clamp_4.c
+++ b/gcc/testsuite/gcc.target/aarch64/sme/clamp_4.c
@@ -2,6 +2,8 @@
#include <arm_sme.h>
+#pragma GCC target "+sme2"
+
#define TEST(TYPE) \
TYPE \
untied_##TYPE(TYPE a, TYPE b, TYPE c, TYPE d) __arm_streaming
\
diff --git a/gcc/testsuite/gcc.target/aarch64/sme/clamp_5.c
b/gcc/testsuite/gcc.target/aarch64/sme/clamp_5.c
new file mode 100644
index 000000000000..7c5464bdc366
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sme/clamp_5.c
@@ -0,0 +1,24 @@
+// { dg-options "-O" }
+
+#include <arm_sme.h>
+
+#pragma GCC target "+nosme2"
+
+#define TEST(TYPE) \
+ TYPE \
+ tied1_##TYPE(TYPE a, TYPE b, TYPE c) __arm_streaming \
+ { \
+ return svminnm_x(svptrue_b8(), svmaxnm_x(svptrue_b8(), a, b), c); \
+ } \
+ \
+ TYPE \
+ tied2_##TYPE(TYPE a, TYPE b, TYPE c) __arm_streaming \
+ { \
+ return svminnm_x(svptrue_b8(), svmaxnm_x(svptrue_b8(), b, a), c); \
+ }
+
+TEST(svfloat16_t)
+TEST(svfloat32_t)
+TEST(svfloat64_t)
+
+/* { dg-final { scan-assembler-not {\tfclamp\t} } } */
