x86: Allow configuring with --with-arch_64=x86-64-v[234]

> +  {"x86-64", PROCESSOR_K8, CPU_K8, PTA_X86_64_BASELINE, 0, P_NONE},
> +  {"x86-64-v2", PROCESSOR_K8, CPU_GENERIC, PTA_X86_64_V2 | PTA_NO_TUNE,
> +   0, P_NONE},
> +  {"x86-64-v3", PROCESSOR_K8, CPU_GENERIC, PTA_X86_64_V3 | PTA_NO_TUNE,
> +   0, P_NONE},
> +  {"x86-64-v4", PROCESSOR_K8, CPU_GENERIC, PTA_X86_64_V4 | PTA_NO_TUNE,
> +   0, P_NONE},
>    {"eden-x2", PROCESSOR_K8, CPU_K8,
>      PTA_64BIT | PTA_MMX | PTA_SSE | PTA_SSE2 | PTA_SSE3 | PTA_FXSR,
>      0, P_NONE},

I have noticed that one can't configure gcc to default to these.

I've also found various other 32-bit or 64-bit -march= arguments for which
it wasn't possible to configure gcc to default to those.

The x86-64-v* the patch only allows in --with-arch_64=, because otherwise
it fails build miserably - as
./xgcc -B ./ -S -march=x86-64-v2 -m32 test.c
cc1: error: ‘x86-64-v2’ architecture level is only defined for the x86-64 psABI
when building 32-bit multilibs.  Even if multilibs are disallowed, I think
the compiler still supports -m32 and so --with-arch_64= seems to be the only
option in which we can support that.

2020-10-22  Jakub Jelinek  <jakub@redhat.com>

	* config.gcc (x86_archs): Add samuel-2, nehemiah, c7 and esther.
	(x86_64_archs): Add eden-x2, nano, nano-1000, nano-2000, nano-3000,
	nano-x2, eden-x4, nano-x4, x86-64-v2, x86-64-v3 and x86-64-v4.
	(i[34567]86-*-* | x86_64-*-*): Only allow x86-64-v* as argument
	to --with-arch_64=.

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 03d89d763b9f8434a2f3a8a777525d6fb7509bee..411200dff916acb3cb15088eb215d0f406b61e43 100644 (file)
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -662,7 +662,8 @@ tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4"
 x86_archs="athlon athlon-4 athlon-fx athlon-mp athlon-tbird \
 athlon-xp k6 k6-2 k6-3 geode c3 c3-2 winchip-c6 winchip2 i386 i486 \
 i586 i686 pentium pentium-m pentium-mmx pentium2 pentium3 pentium3m \
-pentium4 pentium4m pentiumpro prescott lakemont"
+pentium4 pentium4m pentiumpro prescott lakemont samuel-2 nehemiah \
+c7 esther"
 
 # 64-bit x86 processors supported by --with-arch=.  Each processor
 # MUST be separated by exactly one space.
@@ -672,7 +673,8 @@ opteron-sse3 nocona core2 corei7 corei7-avx core-avx-i core-avx2 atom \
 slm nehalem westmere sandybridge ivybridge haswell broadwell bonnell \
 silvermont knl knm skylake-avx512 cannonlake icelake-client icelake-server \
 skylake goldmont goldmont-plus tremont cascadelake tigerlake cooperlake \
-sapphirerapids alderlake x86-64 native"
+sapphirerapids alderlake eden-x2 nano nano-1000 nano-2000 nano-3000 \
+nano-x2 eden-x4 nano-x4 x86-64 x86-64-v2 x86-64-v3 x86-64-v4 native"
 
 # Additional x86 processors supported by --with-cpu=.  Each processor
 # MUST be separated by exactly one space.
@@ -4479,6 +4481,17 @@ case "${target}" in
                                if test x${val} != x; then
                                        case " $x86_64_archs " in
                                        *" ${val} "*)
+                                               # Disallow x86-64-v* for --with-cpu=/--with-tune=
+                                               # or --with-arch= or --with-arch_32=
+                                               # It can be only specified in --with-arch_64=
+                                               case "x$which$val" in
+                                               xcpu*x86-64-v*|xtune*x86-64-v*|xarchx86-64-v*|xarch_32x86-64-v*)
+                                                       echo "Unknown CPU given in --with-$which=$val." 1>&2
+                                                       exit 1
+                                                       ;;
+                                               *)
+                                                       ;;
+                                               esac
                                                # OK
                                                ;;
                                        *)