[aarch64] Add CPU support for Ampere Computing's eMAG.

This patch adds support for Ampere Computing's eMAG processor.
Tested on aarch64 (no regressions seen).

Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>

4 files changed, 30 insertions, 4 deletions

diff --git a/gcc/config/aarch64/aarch64-cores.def b/gcc/config/aarch64/aarch64-cores.def
index 92b57cffb352..f4a6d6a5460e 100644
--- a/gcc/config/aarch64/aarch64-cores.def
+++ b/gcc/config/aarch64/aarch64-cores.def
@@ -71,6 +71,7 @@ AARCH64_CORE("thunderx2t99",  thunderx2t99,  thunderx2t99, 8_1A,  AARCH64_FL_FOR
 
 /* APM ('P') cores. */
 AARCH64_CORE("xgene1",      xgene1,    xgene1,    8A,  AARCH64_FL_FOR_ARCH8, xgene1, 0x50, 0x000, -1)
+AARCH64_CORE("emag",        emag,      xgene1,    8A,  AARCH64_FL_FOR_ARCH8, emag, 0x50, 0x000, -1)
 
 /* V8.1 Architecture Processors.  */
 
diff --git a/gcc/config/aarch64/aarch64-tune.md b/gcc/config/aarch64/aarch64-tune.md
index c948846af7e9..11c09de54a18 100644
--- a/gcc/config/aarch64/aarch64-tune.md
+++ b/gcc/config/aarch64/aarch64-tune.md
@@ -1,5 +1,5 @@
 ;; -*- buffer-read-only: t -*-
 ;; Generated automatically by gentune.sh from aarch64-cores.def
 (define_attr "tune"
-	"cortexa35,cortexa53,cortexa57,cortexa72,cortexa73,exynosm1,falkor,qdf24xx,thunderx,thunderxt88p1,thunderxt88,thunderxt81,thunderxt83,thunderx2t99,xgene1,thunderx2t99p1,vulcan,cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,cortexa73cortexa53"
+	"cortexa35,cortexa53,cortexa57,cortexa72,cortexa73,exynosm1,falkor,qdf24xx,thunderx,thunderxt88p1,thunderxt88,thunderxt81,thunderxt83,thunderx2t99,xgene1,emag,thunderx2t99p1,vulcan,cortexa57cortexa53,cortexa72cortexa53,cortexa73cortexa35,cortexa73cortexa53"
 	(const (symbol_ref "((enum attr_tune) aarch64_tune)")))
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 17f2833abbad..15cafbccc0af 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -759,6 +759,31 @@ static const struct tune_params xgene1_tunings =
   (AARCH64_EXTRA_TUNE_NONE)	/* tune_flags.  */
 };
 
+static const struct tune_params emag_tunings =
+{
+  &xgene1_extra_costs,
+  &xgene1_addrcost_table,
+  &xgene1_regmove_cost,
+  &xgene1_vector_cost,
+  &generic_branch_cost,
+  &xgene1_approx_modes,
+  4, /* memmov_cost  */
+  2, /* issue_rate  */
+  AARCH64_FUSE_NOTHING, /* fusible_ops  */
+  8,	/* function_align.  */
+  8,	/* jump_align.  */
+  4,	/* loop_align.  */
+  2,	/* int_reassoc_width.  */
+  4,	/* fp_reassoc_width.  */
+  1,	/* vec_reassoc_width.  */
+  2,	/* min_div_recip_mul_sf.  */
+  2,	/* min_div_recip_mul_df.  */
+  17,	/* max_case_values.  */
+  0,	/* cache_line_size.  */
+  tune_params::AUTOPREFETCHER_OFF,	/* autoprefetcher_model.  */
+  (AARCH64_EXTRA_TUNE_NONE)	/* tune_flags.  */
+};
+
 static const struct tune_params qdf24xx_tunings =
 {
   &qdf24xx_extra_costs,
@@ -6571,7 +6596,7 @@ aarch64_rtx_costs (rtx x, machine_mode mode, int outer ATTRIBUTE_UNUSED,
       return true;
     }
 
-  if (selected_cpu->ident == xgene1)
+  if (selected_cpu->ident == xgene1 || selected_cpu->ident == emag)
     return xgene1_rtx_costs(x, mode, code, outer, param, cost, speed);
 
   switch (code)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 6c0f99ca7f30..47e4149d9780 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -13988,7 +13988,7 @@ Specify the name of the target processor for which GCC should tune the
 performance of the code.  Permissible values for this option are:
 @samp{generic}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a57},
 @samp{cortex-a72}, @samp{cortex-a73}, @samp{exynos-m1}, @samp{falkor},
-@samp{qdf24xx}, @samp{xgene1}, @samp{vulcan}, @samp{thunderx},
+@samp{qdf24xx}, @samp{xgene1}, @samp{emag}, @samp{vulcan}, @samp{thunderx},
 @samp{thunderxt88}, @samp{thunderxt88p1}, @samp{thunderxt81},
 @samp{thunderxt83}, @samp{thunderx2t99}, @samp{cortex-a57.cortex-a53},
 @samp{cortex-a72.cortex-a53}, @samp{cortex-a73.cortex-a35},
@@ -15158,7 +15158,7 @@ Permissible names are: @samp{arm2}, @samp{arm250},
 @samp{xscale}, @samp{iwmmxt}, @samp{iwmmxt2}, @samp{ep9312},
 @samp{fa526}, @samp{fa626},
 @samp{fa606te}, @samp{fa626te}, @samp{fmp626}, @samp{fa726te},
-@samp{xgene1}.
+@samp{xgene1}, @samp{emag}.
 
 Additionally, this option can specify that GCC should tune the performance
 of the code for a big.LITTLE system.  Permissible names are: