On 04/20/16 12:59, Alexander Monakov wrote:
This patch implements per-warp compiler-defined stacks under -msoft-stack
option, and implements alloca on top of that. In a few obvious places,
changes from -muniform-simt patch are present in the hunks.
It'd be better to not mix fragments of patches, and have a description of how
soft stacks works.
+ /* fstmp2 = &__nvptx_stacks[tid.y]; */
?
+ /* crtl->is_leaf is not initialized because RA is not run. */
Cryptic comment is cryptic.
+ fprintf (asm_out_file, ".extern .shared .u%d __nvptx_stacks[32];\n",
Magic constant '32'?
+ if (need_unisimt_decl)
+ {
+ write_var_marker (asm_out_file, false, true, "__nvptx_uni");
+ fprintf (asm_out_file, ".extern .shared .u32 __nvptx_uni[32];\n");
+ }
Looks like some other patch?
/* Expander for the shuffle builtins. */
diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index 381269e..6da4d06 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
+ if (TARGET_UNIFORM_SIMT) \
+ builtin_define ("__nvptx_unisimt__"); \
Likewise.
+ rtx unisimt_master; /* Master lane index for "uniform simt" mode. */
+ rtx unisimt_predicate; /* Predicate register for "uniform simt". */
Likewise.
Needs testcases.
nathan
