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authorWalter Lee <walt@tilera.com>2012-08-28 05:25:35 +0000
committerWalter Lee <walt@gcc.gnu.org>2012-08-28 05:25:35 +0000
commit1773cd776ad33ff4688ff29437ec716eda0e58e6 (patch)
tree3e7d11fa496c2071981a5edd482d7156296ae74a /gcc/doc
parentbebfb71bf4e1baae9761f1473ca35914f09dd8e3 (diff)
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Add support for the -mcmodel=MODEL flag on TILE-Gx.
Add support for the -mcmodel=MODEL flag on TILE-Gx. The models supported are small and large. In the small model (default), distance for direct calls is limited to 500M in either direction. PC-relative addresses are 32 bits. Absolute addresses support the full address range. In the large model, there is no limiation on call distance, pc-relative addresses, or absolute addresses. * doc/invoke.texi: Document -mcmodel=small, -mcmodel=large. * config/tilegx/tilegx.h: Include config/tilegx/tilegx-opts.h. (CRT_CALL_STATIC_FUNCTION): Define. * config/tilegx/predicates.md (const_last_symbolic_operand): Handle UNSPEC_HW2_LAST_PCREL, UNSPEC_HW1_LAST_PLT_PCREL, and UNSPEC_HW2_LAST_PLT_PCREL. (const_symbolic_operand): Handle UNSPEC_HW1_PCREL, UNSPEC_HW0_PLT_PCREL, and UNSPEC_HW1_PLT_PCREL. * config/tilegx/tilegx.md (UNSPEC_MOV_LARGE_PCREL_STEP4): Define, and renumber the constants that follow. (UNSPEC_HW1_PCREL): Define, and renumber the constants that follow. (UNSPEC_HW0_PLT_PCREL): Define. (UNSPEC_HW1_PLT_PCREL): Define. (UNSPEC_HW1_LAST_PLT_PCREL): Define. (UNSPEC_HW2_LAST_PLT_PCREL): Define. (mov_large_pcrel_step1): Define. (mov_large_pcrel_step2): Define. (mov_large_pcrel_step3): Define. (mov_large_pcrel_step4): Define. (mov_plt_pcrel_step1): Define. (mov_plt_pcrel_step2): Define. (mov_plt_pcrel_step3): Define. (mov_plt_pcrel_step1_32bit): Define. (mov_plt_pcrel_step2_32bit): Define. (call): Handle tilegx_cmodel == CM_LARGE, CM_LARGE_PIC. (call_value): Ditto. * config/tilegx/tilegx.opt: Include config/tilegx/tilegx-opts.h. (mcmodel): New option. (enum cmodel): Define. (CM_SMALL): Define. (CM_LARGE): Define. * config/tilegx/tilegx-protos.h (tilegx_compute_pcrel_address): Declare. (tilegx_compute_pcrel_plt_address): Declare. * config/tilegx/tilegx.c (tilegx_option_override): Handle tilegx_cmodel. (tilegx_function_ok_for_sibcall): Ditto. (compute_pcrel_address): Rename to tilegx_compute_pcrel_address, and don't declare static. Handle tilegx_cmodel. (tilegx_compute_pcrel_plt_address): Define. (tilegx_legitimize_pic_address): Rename calls to compute_pcrel_address. (tilegx_delegitimize_address): Handle UNSPEC_HW1_PCREL, UNSPEC_HW2_LAST_PCREL, UNSPEC_HW0_PLT_PCREL, UNSPEC_HW1_PLT_PCREL, UNSPEC_HW1_LAST_PLT_PCREL, UNSPEC_HW2_LAST_PLT_PCREL. (load_pic_register): Rename call to compute_pcrel_address. (tilegx_print_operand): Handle UNSPEC_HW1_PCREL, UNSPEC_HW2_LAST_PCREL, UNSPEC_HW0_PLT_PCREL, UNSPEC_HW1_PLT_PCREL, UNSPEC_HW1_LAST_PLT_PCREL, UNSPEC_HW2_LAST_PLT_PCREL. From-SVN: r190737
Diffstat (limited to 'gcc/doc')
-rw-r--r--gcc/doc/invoke.texi13
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index daf9a5d..bf7844d 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -929,7 +929,7 @@ See RS/6000 and PowerPC Options.
@gccoptlist{-Qy -Qn -YP,@var{paths} -Ym,@var{dir}}
@emph{TILE-Gx Options}
-@gccoptlist{-mcpu=CPU -m32 -m64}
+@gccoptlist{-mcpu=CPU -m32 -m64 -mcmodel=@var{code-model}}
@emph{TILEPro Options}
@gccoptlist{-mcpu=CPU -m32}
@@ -18937,6 +18937,17 @@ The assembler uses this option.
These @samp{-m} options are supported on the TILE-Gx:
@table @gcctabopt
+@item -mcmodel=small
+@opindex mcmodel=small
+Generate code for the small model. Distance for direct calls is
+limited to 500M in either direction. PC-relative addresses are 32
+bits. Absolute addresses support the full address range.
+
+@item -mcmodel=large
+@opindex mcmodel=large
+Generate code for the large model. There is no limiation on call
+distance, pc-relative addresses, or absolute addresses.
+
@item -mcpu=@var{name}
@opindex mcpu
Selects the type of CPU to be targeted. Currently the only supported