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rs6000: Improve .machine

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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.

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

	* config/rs6000/rs6000.cc (rs6000_machine_from_flags): Restructure a
	bit.  Handle most older CPUs.
This commit is contained in:
Segher Boessenkool 2022-03-01 17:04:29 +00:00
parent 0e5d9ae8e4
commit 77eccbf39e
1 changed files with 48 additions and 21 deletions
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69
gcc/config/rs6000/rs6000.cc
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@ -5764,33 +5764,60 @@ 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;