Hi,
This patch adds the undocumented switch -mprefixed-addr and a little of the
basic
infrastructure around it. It also includes a couple of lines in the same code
regions to disable P8 fusion for -mcpu=future.
Bootstrapped and tested on powerpc64le-unknown-linux-gnu with no regressions.
Is this okay for trunk?
Thanks,
Bill
2019-05-28 Bill Schmidt <wschm...@linux.ibm.com>
Michael Meissner <meiss...@linux.ibm.com>
* rs6000-cpus.def (OTHER_FUSION_MASKS): New #define.
(ISA_FUTURE_MASKS_SERVER): Add OPTION_MASK_PREFIXED_ADDR. Mask off
OTHER_FUSION_MASKS.
(OTHER_FUTURE_MASKS): Add OPTION_MASK_PREFIXED_ADDR.
(POWERPC_MASKS): Likewise.
* rs6000.c (rs6000_option_override_internal): Error if
-mprefixed-addr is specified without -mcpu=future. Error if
-mpcrel is specified without -mprefixed-addr.
(rs6000_opt_masks): Add entry for prefixed-addr.
* rs6000.opt (mprefixed-addr): New option.
diff --git a/gcc/config/rs6000/rs6000-cpus.def
b/gcc/config/rs6000/rs6000-cpus.def
index 5337382bdcf..2fb612a8401 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -72,13 +72,20 @@
| OPTION_MASK_P9_VECTOR \
| OPTION_MASK_DIRECT_MOVE)
+/* ISA masks setting fusion options. */
+#define OTHER_FUSION_MASKS (OPTION_MASK_P8_FUSION \
+ | OPTION_MASK_P8_FUSION_SIGN)
+
/* Support for a future processor's features. */
-#define ISA_FUTURE_MASKS_SERVER (ISA_3_0_MASKS_SERVER
\
- | OPTION_MASK_FUTURE \
- | OPTION_MASK_PCREL)
+#define ISA_FUTURE_MASKS_SERVER ((ISA_3_0_MASKS_SERVER
\
+ | OPTION_MASK_FUTURE \
+ | OPTION_MASK_PCREL \
+ | OPTION_MASK_PREFIXED_ADDR) \
+ & ~OTHER_FUSION_MASKS)
/* Flags that need to be turned off if -mno-future. */
-#define OTHER_FUTURE_MASKS (OPTION_MASK_PCREL)
+#define OTHER_FUTURE_MASKS (OPTION_MASK_PCREL \
+ | OPTION_MASK_PREFIXED_ADDR)
/* Flags that need to be turned off if -mno-power9-vector. */
#define OTHER_P9_VECTOR_MASKS (OPTION_MASK_FLOAT128_HW \
@@ -139,6 +146,7 @@
| OPTION_MASK_POWERPC64 \
| OPTION_MASK_PPC_GFXOPT \
| OPTION_MASK_PPC_GPOPT \
+ | OPTION_MASK_PREFIXED_ADDR \
| OPTION_MASK_QUAD_MEMORY \
| OPTION_MASK_QUAD_MEMORY_ATOMIC \
| OPTION_MASK_RECIP_PRECISION \
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 9229bad6acc..1860b344c3a 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -4296,12 +4296,24 @@ rs6000_option_override_internal (bool global_init_p)
rs6000_isa_flags &= ~OPTION_MASK_FLOAT128_HW;
}
- /* -mpcrel requires the prefixed load/store support on FUTURE systems. */
- if (!TARGET_FUTURE && TARGET_PCREL)
+ /* -mprefixed-addr and -mpcrel require the prefixed load/store support on
+ FUTURE systems. */
+ if (!TARGET_FUTURE && (TARGET_PCREL || TARGET_PREFIXED_ADDR))
{
if ((rs6000_isa_flags_explicit & OPTION_MASK_PCREL) != 0)
error ("%qs requires %qs", "-mpcrel", "-mcpu=future");
+ else if ((rs6000_isa_flags_explicit & OPTION_MASK_PREFIXED_ADDR) != 0)
+ error ("%qs requires %qs", "-mprefixed-addr", "-mcpu=future");
+
+ rs6000_isa_flags &= ~(OPTION_MASK_PCREL | OPTION_MASK_PREFIXED_ADDR);
+ }
+
+ if (TARGET_PCREL && !TARGET_PREFIXED_ADDR)
+ {
+ if ((rs6000_isa_flags_explicit & OPTION_MASK_PCREL) != 0)
+ error ("%qs requires %qs", "-mpcrel", "-mprefixed-addr");
+
rs6000_isa_flags &= ~OPTION_MASK_PCREL;
}
@@ -36379,6 +36391,7 @@ static struct rs6000_opt_mask const rs6000_opt_masks[] =
{ "power9-vector", OPTION_MASK_P9_VECTOR, false, true },
{ "powerpc-gfxopt", OPTION_MASK_PPC_GFXOPT, false, true },
{ "powerpc-gpopt", OPTION_MASK_PPC_GPOPT, false, true },
+ { "prefixed-addr", OPTION_MASK_PREFIXED_ADDR, false, true },
{ "quad-memory", OPTION_MASK_QUAD_MEMORY, false, true },
{ "quad-memory-atomic", OPTION_MASK_QUAD_MEMORY_ATOMIC, false, true },
{ "recip-precision", OPTION_MASK_RECIP_PRECISION, false, true },
diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
index 43b04834746..3a4353674b8 100644
--- a/gcc/config/rs6000/rs6000.opt
+++ b/gcc/config/rs6000/rs6000.opt
@@ -574,6 +574,10 @@ mfuture
Target Report Mask(FUTURE) Var(rs6000_isa_flags)
Use instructions for a future architecture.
+mprefixed-addr
+Target Undocumented Mask(PREFIXED_ADDR) Var(rs6000_isa_flags)
+Generate (do not generate) prefixed memory instructions.
+
mpcrel
Target Report Mask(PCREL) Var(rs6000_isa_flags)
Generate (do not generate) pc-relative memory addressing.
