From: Alexandre Oliva <oliva@gnu.org>
Date: Mon, 22 Feb 2021 01:50:12 +0000 (-0300)
Subject: make svp64 mutually exclusive with vsx and altivec
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=27225f57ecea6a7417898119a3a02ee10a9c10bd;p=gcc.git

make svp64 mutually exclusive with vsx and altivec
---

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 991da1f9fc0..e921215653d 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -3944,6 +3944,50 @@ rs6000_option_override_internal (bool global_init_p)
 	}
     }
 
+  /* Add some warnings, errors and overriders for SVP64.  */
+  if (TARGET_SVP64)
+    {
+      const bool xsvp64 = rs6000_isa_flags_explicit & OPTION_MASK_SVP64;
+      const bool xvsx = rs6000_isa_flags_explicit & OPTION_MASK_VSX;
+      const bool xaltivec = rs6000_isa_flags_explicit & OPTION_MASK_ALTIVEC;
+      const bool vsx = TARGET_VSX;
+      const bool altivec = TARGET_ALTIVEC;
+
+      if (xsvp64)
+	{
+	  if (vsx)
+	    {
+	      if (xvsx)
+		error ("%<-mvsx%> and %<-msvp64%> are incompatible");
+	      else
+		warning (0, "%<-msvp64%> disables vsx");
+
+	      rs6000_isa_flags &= ~ OPTION_MASK_VSX;
+	      rs6000_isa_flags_explicit |= OPTION_MASK_VSX;
+	    }
+	  if (altivec)
+	    {
+	      if (xaltivec)
+		error ("%<-maltivec%> and %<-msvp64%> are incompatible");
+	      else
+		warning (0, "%<-msvp64%> disables altivec");
+
+	      rs6000_isa_flags &= ~ OPTION_MASK_ALTIVEC;
+	      rs6000_isa_flags_explicit |= OPTION_MASK_ALTIVEC;
+	    }
+	}
+      else
+	{
+	  if (vsx)
+	    warning (0, "%<-mvsx%> disables svp64");
+	  if (altivec)
+	    warning (0, "%<-maltivec%> disables svp64");
+
+	  rs6000_isa_flags &= ~ OPTION_MASK_SVP64;
+	  rs6000_isa_flags_explicit |= OPTION_MASK_SVP64;
+	}
+    }
+
   /* If hard-float/altivec/vsx were explicitly turned off then don't allow
      the -mcpu setting to enable options that conflict. */
   if ((!TARGET_HARD_FLOAT || !TARGET_ALTIVEC || !TARGET_VSX)