[PATCH 2/3] Fix IEEE 128-bit min/max test.
This patch fixes the float128-minmax.c test so that it can accommodate the
generation of xsmincqp and xsmaxcqp instructions on power10. I changed
the effective target from 'float128' to 'ppc_float128_hw', since this
needs the IEEE 128-bit float hardware support.
I tested it on 3 platforms:
* Power9 little endian, --with-code=power9;
* Power8 big endian, --with-code=power8, both 32/64-bit tests done;
* Power10 little endian, --with-code=power10.
All systems bootstrapped and there were no new regressions. I believe I have
addressed the issues with the last patch.
Can I check this into the master branch, and after a soak-in period, back port
it to the GCC 11 branch?
gcc/testsuite/
2021-06-08 Michael Meissner <meiss...@linux.ibm.com>
* gcc.target/powerpc/float128-minmax.c: Adjust expected code for
power10.
* lib/target-supports.exp (check_effective_target_has_arch_pwr10):
New target support.
---
gcc/testsuite/gcc.target/powerpc/float128-minmax.c | 8 +++++---
gcc/testsuite/lib/target-supports.exp | 10 ++++++++++
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
b/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
index fe397518f2f..a7d3a3a0b3e 100644
--- a/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
+++ b/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
@@ -1,6 +1,5 @@
-/* { dg-do compile { target lp64 } } */
/* { dg-require-effective-target powerpc_p9vector_ok } */
-/* { dg-require-effective-target float128 } */
+/* { dg-require-effective-target ppc_float128_hw } */
/* { dg-options "-mpower9-vector -O2 -ffast-math" } */
#ifndef TYPE
@@ -12,5 +11,8 @@
TYPE f128_min (TYPE a, TYPE b) { return __builtin_fminf128 (a, b); }
TYPE f128_max (TYPE a, TYPE b) { return __builtin_fmaxf128 (a, b); }
-/* { dg-final { scan-assembler {\mxscmpuqp\M} } } */
+/* Adjust code power10 which has native min/max instructions. */
+/* { dg-final { scan-assembler {\mxscmpuqp\M} { target { ! has_arch_pwr10
} } } } */
+/* { dg-final { scan-assembler {\mxsmincqp\M} { target { has_arch_pwr10
} } } } */
+/* { dg-final { scan-assembler {\mxsmaxcqp\M} { target { has_arch_pwr10
} } } } */
/* { dg-final { scan-assembler-not {\mbl\M} } } */
diff --git a/gcc/testsuite/lib/target-supports.exp
b/gcc/testsuite/lib/target-supports.exp
index 7f78c5593ac..789723fb287 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -6127,6 +6127,16 @@ proc check_effective_target_has_arch_pwr9 { } {
}]
}
+proc check_effective_target_has_arch_pwr10 { } {
+ return [check_no_compiler_messages arch_pwr10 assembly {
+ #ifndef _ARCH_PWR10
+ #error does not have power10 support.
+ #else
+ /* "has power10 support" */
+ #endif
+ }]
+}
+
# Return 1 if this is a PowerPC target supporting -mcpu=power10.
# Limit this to 64-bit linux systems for now until other targets support
# power10.
--
2.31.1
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797
