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i965/fs: Emit load_payload instead of multiple MOVs for large VGRFs.

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This commit is contained in:
Matt Turner
2014-03-25 15:43:21 -07:00
parent 68b7b03429
commit 4b7bca8979
1 changed files with 21 additions and 12 deletions
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src/mesa/drivers/dri/i965/brw_fs_cse.cpp
+21 -12
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@@ -188,15 +188,20 @@ fs_visitor::opt_cse_local(bblock_t *block, exec_list *aeb)
entry->tmp = tmp;
entry->generator->dst = tmp;
for (int i = 0; i < written; i++) {
fs_inst *copy = MOV(orig_dst, tmp);
fs_inst *copy;
if (written > 1) {
fs_reg *sources = ralloc_array(mem_ctx, fs_reg, written);
for (int i = 0; i < written; i++) {
sources[i] = tmp;
sources[i].reg_offset = i;
}
copy = LOAD_PAYLOAD(orig_dst, sources, written);
} else {
copy = MOV(orig_dst, tmp);
copy->force_writemask_all =
entry->generator->force_writemask_all;
entry->generator->insert_after(copy);
orig_dst.reg_offset++;
tmp.reg_offset++;
}
entry->generator->insert_after(copy);
}
/* dest <- temp */
@@ -206,15 +211,19 @@ fs_visitor::opt_cse_local(bblock_t *block, exec_list *aeb)
assert(inst->dst.type == entry->tmp.type);
fs_reg dst = inst->dst;
fs_reg tmp = entry->tmp;
fs_inst *copy = NULL;
for (int i = 0; i < written; i++) {
fs_inst *copy;
if (written > 1) {
fs_reg *sources = ralloc_array(mem_ctx, fs_reg, written);
for (int i = 0; i < written; i++) {
sources[i] = tmp;
sources[i].reg_offset = i;
}
copy = LOAD_PAYLOAD(dst, sources, written);
} else {
copy = MOV(dst, tmp);
copy->force_writemask_all = inst->force_writemask_all;
inst->insert_before(copy);
dst.reg_offset++;
tmp.reg_offset++;
}
inst->insert_before(copy);
}
/* Set our iterator so that next time through the loop inst->next