diff options
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c index e55e3dce674..53a5ce0cd87 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_tgsi_soa.c @@ -169,8 +169,7 @@ static void lp_exec_mask_init(struct lp_exec_mask *mask, struct lp_build_context static void lp_exec_mask_update(struct lp_exec_mask *mask) { if (mask->loop_stack_size) { - /*for loops we need to update the entire mask at - * runtime */ + /*for loops we need to update the entire mask at runtime */ LLVMValueRef tmp; assert(mask->break_mask); tmp = LLVMBuildAnd(mask->bld->builder, @@ -249,6 +248,10 @@ static void lp_exec_break(struct lp_exec_mask *mask) mask->exec_mask, "break"); + /* mask->break_stack_size > 1 implies that we encountered a break + * statemant already and if that's the case we want to make sure + * our mask is a combination of the previous break and the current + * execution mask */ if (mask->break_stack_size > 1) { mask->break_mask = LLVMBuildAnd(mask->bld->builder, mask->break_mask, @@ -300,10 +303,11 @@ static void lp_exec_endloop(struct lp_exec_mask *mask) LLVMPositionBuilderAtEnd(mask->bld->builder, endloop); mask->loop_block = mask->loop_stack[--mask->loop_stack_size]; - /* pop the break mask */ + /* pop the cont mask */ if (mask->cont_stack_size) { mask->cont_mask = mask->cont_stack[--mask->cont_stack_size]; } + /* pop the break mask */ if (mask->break_stack_size) { mask->break_mask = mask->break_stack[--mask->break_stack_size]; } @@ -311,6 +315,11 @@ static void lp_exec_endloop(struct lp_exec_mask *mask) lp_exec_mask_update(mask); } +/* stores val into an address pointed to by dst. + * mask->exec_mask is used to figure out which bits of val + * should be stored into the address + * (0 means don't store this bit, 1 means do store). + */ static void lp_exec_mask_store(struct lp_exec_mask *mask, LLVMValueRef val, LLVMValueRef dst) |