[gcc(refs/users/meissner/heads/work055)] Revert patch.

[Michael Meissner <meissner@gcc.gnu.org>]

https://gcc.gnu.org/g:bc4b76e491a481c25cb8803055fc213c87831070

commit bc4b76e491a481c25cb8803055fc213c87831070
Author: Michael Meissner <meissner@linux.ibm.com>
Date:   Mon Jun 7 22:58:08 2021 -0400

    Revert patch.
    
    gcc/
    2021-06-07  Michael Meissner  <meissner@linux.ibm.com>
    
            Revert patch.
            * config/rs6000/rs6000.c (rs6000_emit_minmax): Add support for ISA
            3.1 IEEE 128-bit floating point xsmaxcqp and xsmincqp instructions.
            * config/rs6000/rs6000.md (s<minmax><mode>3, IEEE128 iterator):
            New insns.
    
    gcc/testsuite/
    2021-06-07  Michael Meissner  <meissner@linux.ibm.com>
    
            Revert patch.
            * gcc.target/powerpc/float128-minmax-2.c: New test.
            * gcc.target/powerpc/float128-minmax.c: Do not run on power10.
            * lib/target-supports.exp (check_effective_target_has_arch_pwr10):
            New target support.

Diff:
---
 gcc/config/rs6000/rs6000.c                           |  3 +--
 gcc/config/rs6000/rs6000.md                          | 11 -----------
 gcc/testsuite/gcc.target/powerpc/float128-minmax-2.c | 15 ---------------
 gcc/testsuite/gcc.target/powerpc/float128-minmax.c   |  7 ++-----
 gcc/testsuite/lib/target-supports.exp                | 10 ----------
 5 files changed, 3 insertions(+), 43 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 1651788df6a..b01bb5c8191 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -16103,8 +16103,7 @@ rs6000_emit_minmax (rtx dest, enum rtx_code code, rtx op0, rtx op1)
   /* VSX/altivec have direct min/max insns.  */
   if ((code == SMAX || code == SMIN)
       && (VECTOR_UNIT_ALTIVEC_OR_VSX_P (mode)
-	  || (mode == SFmode && VECTOR_UNIT_VSX_P (DFmode))
-	  || (TARGET_POWER10 && TARGET_FLOAT128_HW && FLOAT128_IEEE_P (mode))))
+	  || (mode == SFmode && VECTOR_UNIT_VSX_P (DFmode))))
     {
       emit_insn (gen_rtx_SET (dest, gen_rtx_fmt_ee (code, mode, op0, op1)));
       return;
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 064c3a2d9d6..3f59b544f6a 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -5214,17 +5214,6 @@
 }
   [(set_attr "type" "fp")])
 
-;; Min/max for ISA 3.1 IEEE 128-bit floating point
-(define_insn "s<minmax><mode>3"
-  [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v")
-	(fp_minmax:IEEE128
-	 (match_operand:IEEE128 1 "altivec_register_operand" "v")
-	 (match_operand:IEEE128 2 "altivec_register_operand" "v")))]
-  "TARGET_POWER10"
-  "xs<minmax>cqp %0,%1,%2"
-  [(set_attr "type" "vecfloat")
-   (set_attr "size" "128")])
-
 ;; The conditional move instructions allow us to perform max and min operations
 ;; even when we don't have the appropriate max/min instruction using the FSEL
 ;; instruction.
diff --git a/gcc/testsuite/gcc.target/powerpc/float128-minmax-2.c b/gcc/testsuite/gcc.target/powerpc/float128-minmax-2.c
deleted file mode 100644
index c71ba08c9f8..00000000000
--- a/gcc/testsuite/gcc.target/powerpc/float128-minmax-2.c
+++ /dev/null
@@ -1,15 +0,0 @@
-/* { dg-require-effective-target ppc_float128_hw } */
-/* { dg-require-effective-target power10_ok } */
-/* { dg-options "-mdejagnu-cpu=power10 -O2 -ffast-math" } */
-
-#ifndef TYPE
-#define TYPE _Float128
-#endif
-
-/* Test that the fminf128/fmaxf128 functions generate if/then/else and not a
-   call.  */
-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 {\mxsmaxcqp\M} } } */
-/* { dg-final { scan-assembler {\mxsmincqp\M} } } */
diff --git a/gcc/testsuite/gcc.target/powerpc/float128-minmax.c b/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
index 76bb88b170d..fe397518f2f 100644
--- a/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
+++ b/gcc/testsuite/gcc.target/powerpc/float128-minmax.c
@@ -1,10 +1,7 @@
 /* { dg-do compile { target lp64 } } */
-/* { dg-require-effective-target powerpc_p9vector_ok && ! has_arch_pwr10 } */
+/* { dg-require-effective-target powerpc_p9vector_ok } */
 /* { dg-require-effective-target float128 } */
-/* { dg-options "-O2 -ffast-math" } */
-
-/* We don't run this test on power10 because power10 has instructions to
-   implement min/max directly.  */
+/* { dg-options "-mpower9-vector -O2 -ffast-math" } */
 
 #ifndef TYPE
 #define TYPE _Float128
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 789723fb287..7f78c5593ac 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -6127,16 +6127,6 @@ 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.