Module: Mesa Branch: 7.10 Commit: bb90087edae6628e89109f4af56e5fc4e56a6aa5 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=bb90087edae6628e89109f4af56e5fc4e56a6aa5
Author: Kenneth Graunke <[email protected]> Date: Sat Feb 19 16:12:28 2011 -0800 i965/fs: Refactor control flow stack handling. We can't safely use fixed size arrays since Gen6+ supports unlimited nesting of control flow. NOTE: This is a candidate for the 7.10 branch. Reviewed-by: Eric Anholt <[email protected]> (cherry picked from commit df2aef0e197f9276f60a8e755260420c90841269) --- src/mesa/drivers/dri/i965/brw_fs.cpp | 34 +++++++++++++++++++++++++++------- 1 files changed, 27 insertions(+), 7 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index e24c728..dcbdacf 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -3337,20 +3337,25 @@ void fs_visitor::generate_code() { int last_native_inst = 0; - struct brw_instruction *if_stack[16], *loop_stack[16]; - int if_stack_depth = 0, loop_stack_depth = 0; - int if_depth_in_loop[16]; const char *last_annotation_string = NULL; ir_instruction *last_annotation_ir = NULL; + int if_stack_array_size = 16; + int loop_stack_array_size = 16; + int if_stack_depth = 0, loop_stack_depth = 0; + brw_instruction **if_stack = + rzalloc_array(this->mem_ctx, brw_instruction *, if_stack_array_size); + brw_instruction **loop_stack = + rzalloc_array(this->mem_ctx, brw_instruction *, loop_stack_array_size); + int *if_depth_in_loop = + rzalloc_array(this->mem_ctx, int, loop_stack_array_size); + + if (unlikely(INTEL_DEBUG & DEBUG_WM)) { printf("Native code for fragment shader %d:\n", ctx->Shader.CurrentFragmentProgram->Name); } - if_depth_in_loop[loop_stack_depth] = 0; - - memset(&if_stack, 0, sizeof(if_stack)); foreach_iter(exec_list_iterator, iter, this->instructions) { fs_inst *inst = (fs_inst *)iter.get(); struct brw_reg src[3], dst; @@ -3434,7 +3439,6 @@ fs_visitor::generate_code() break; case BRW_OPCODE_IF: - assert(if_stack_depth < 16); if (inst->src[0].file != BAD_FILE) { assert(intel->gen >= 6); if_stack[if_stack_depth] = brw_IF_gen6(p, inst->conditional_mod, src[0], src[1]); @@ -3443,6 +3447,11 @@ fs_visitor::generate_code() } if_depth_in_loop[loop_stack_depth]++; if_stack_depth++; + if (if_stack_array_size <= if_stack_depth) { + if_stack_array_size *= 2; + if_stack = reralloc(this->mem_ctx, if_stack, brw_instruction *, + if_stack_array_size); + } break; case BRW_OPCODE_ELSE: @@ -3457,6 +3466,13 @@ fs_visitor::generate_code() case BRW_OPCODE_DO: loop_stack[loop_stack_depth++] = brw_DO(p, BRW_EXECUTE_8); + if (loop_stack_array_size <= loop_stack_depth) { + loop_stack_array_size *= 2; + loop_stack = reralloc(this->mem_ctx, loop_stack, brw_instruction *, + loop_stack_array_size); + if_depth_in_loop = reralloc(this->mem_ctx, if_depth_in_loop, int, + loop_stack_array_size); + } if_depth_in_loop[loop_stack_depth] = 0; break; @@ -3575,6 +3591,10 @@ fs_visitor::generate_code() last_native_inst = p->nr_insn; } + ralloc_free(if_stack); + ralloc_free(loop_stack); + ralloc_free(if_depth_in_loop); + brw_set_uip_jip(p); /* OK, while the INTEL_DEBUG=wm above is very nice for debugging FS _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
