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* [PATCH] rs6000: Improve .machine
@ 2022-03-04 16:51 Segher Boessenkool
  2022-03-07 20:53 ` Joseph Myers
  2022-03-10  8:25 ` Sebastian Huber
  0 siblings, 2 replies; 10+ messages in thread
From: Segher Boessenkool @ 2022-03-04 16:51 UTC (permalink / raw)
  To: gcc-patches; +Cc: dje.gcc, Segher Boessenkool

Hi!

This adds more correct .machine for most older CPUs.  It should be
conservative in the sense that everything we handled before we handle at
least as well now.  This does not yet revamp the server CPU handling, it
is too risky at this point in time.

Tested on powerpc64-linux {-m32,-m64}.  Also manually tested with all
-mcpu=, and the output of that passed through the GNU assembler.

I plan to commit this later today.


Segher


2022-03-04  Segher Boessenkool  <segher@kernel.crashing.org>

	* config/rs6000/rs6000.c (rs6000_machine_from_flags): Restructure a bit.
	Handle most older CPUs.
---
 gcc/config/rs6000/rs6000.cc | 69 +++++++++++++++++++++++++++++++--------------
 1 file changed, 48 insertions(+), 21 deletions(-)

diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 78cc085d7855..f2b977bfe93c 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -5790,33 +5790,60 @@ const char *rs6000_machine;
 const char *
 rs6000_machine_from_flags (void)
 {
-  /* For some CPUs, the machine cannot be determined by ISA flags.  We have to
-     check them first.  */
-  switch (rs6000_cpu)
-    {
-    case PROCESSOR_PPC8540:
-    case PROCESSOR_PPC8548:
-      return "e500";
+  /* e300 and e500 */
+  if (rs6000_cpu == PROCESSOR_PPCE300C2 || rs6000_cpu == PROCESSOR_PPCE300C3)
+    return "e300";
+  if (rs6000_cpu == PROCESSOR_PPC8540 || rs6000_cpu == PROCESSOR_PPC8548)
+    return "e500";
+  if (rs6000_cpu == PROCESSOR_PPCE500MC)
+    return "e500mc";
+  if (rs6000_cpu == PROCESSOR_PPCE500MC64)
+    return "e500mc64";
+  if (rs6000_cpu == PROCESSOR_PPCE5500)
+    return "e5500";
+  if (rs6000_cpu == PROCESSOR_PPCE6500)
+    return "e6500";
 
-    case PROCESSOR_PPCE300C2:
-    case PROCESSOR_PPCE300C3:
-      return "e300";
+  /* 400 series */
+  if (rs6000_cpu == PROCESSOR_PPC403)
+    return "\"403\"";
+  if (rs6000_cpu == PROCESSOR_PPC405)
+    return "\"405\"";
+  if (rs6000_cpu == PROCESSOR_PPC440)
+    return "\"440\"";
+  if (rs6000_cpu == PROCESSOR_PPC476)
+    return "\"476\"";
 
-    case PROCESSOR_PPCE500MC:
-      return "e500mc";
+  /* A2 */
+  if (rs6000_cpu == PROCESSOR_PPCA2)
+    return "a2";
 
-    case PROCESSOR_PPCE500MC64:
-      return "e500mc64";
+  /* Cell BE */
+  if (rs6000_cpu == PROCESSOR_CELL)
+    return "cell";
 
-    case PROCESSOR_PPCE5500:
-      return "e5500";
+  /* Titan */
+  if (rs6000_cpu == PROCESSOR_TITAN)
+    return "titan";
 
-    case PROCESSOR_PPCE6500:
-      return "e6500";
+  /* 500 series and 800 series */
+  if (rs6000_cpu == PROCESSOR_MPCCORE)
+    return "\"821\"";
 
-    default:
-      break;
-    }
+  /* 600 series and 700 series, "classic" */
+  if (rs6000_cpu == PROCESSOR_PPC601 || rs6000_cpu == PROCESSOR_PPC603
+      || rs6000_cpu == PROCESSOR_PPC604 || rs6000_cpu == PROCESSOR_PPC604e
+      || rs6000_cpu == PROCESSOR_PPC750 || rs6000_cpu == PROCESSOR_POWERPC)
+    return "ppc";
+
+  /* Classic with AltiVec, "G4" */
+  if (rs6000_cpu == PROCESSOR_PPC7400 || rs6000_cpu == PROCESSOR_PPC7450)
+    return "\"7450\"";
+
+  /* The older 64-bit CPUs */
+  if (rs6000_cpu == PROCESSOR_PPC620 || rs6000_cpu == PROCESSOR_PPC630
+      || rs6000_cpu == PROCESSOR_RS64A || rs6000_cpu == PROCESSOR_POWERPC64)
+    return "ppc64";
 
   HOST_WIDE_INT flags = rs6000_isa_flags;
 
-- 
1.8.3.1


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2022-06-20 18:53 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-04 16:51 [PATCH] rs6000: Improve .machine Segher Boessenkool
2022-03-07 20:53 ` Joseph Myers
2022-03-07 21:57   ` Segher Boessenkool
2022-03-10  8:25 ` Sebastian Huber
2022-03-10 10:11   ` Segher Boessenkool
2022-03-15 14:29     ` Sebastian Huber
2022-03-15 22:29       ` Segher Boessenkool
2022-04-04  9:31         ` Sebastian Huber
2022-06-20  7:48           ` Sebastian Huber
2022-06-20 18:52             ` Segher Boessenkool

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