| /* |
| * Copyright (C) 2020 Collabora Ltd. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Authors (Collabora): |
| * Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> |
| */ |
| |
| #include "compiler.h" |
| |
| /* Does an instruction respect outmods and source mods? Depend |
| * on the types involved */ |
| |
| bool |
| bi_has_outmod(bi_instruction *ins) |
| { |
| bool classy = bi_class_props[ins->type] & BI_MODS; |
| bool floaty = nir_alu_type_get_base_type(ins->dest_type) == nir_type_float; |
| |
| return classy && floaty; |
| } |
| |
| /* Have to check source for e.g. compares */ |
| |
| bool |
| bi_has_source_mods(bi_instruction *ins) |
| { |
| bool classy = bi_class_props[ins->type] & BI_MODS; |
| bool floaty = nir_alu_type_get_base_type(ins->src_types[0]) == nir_type_float; |
| |
| return classy && floaty; |
| } |
| |
| /* A source is swizzled if the op is swizzlable, in 8-bit or |
| * 16-bit mode, and the swizzled op. TODO: multi args */ |
| |
| bool |
| bi_is_src_swizzled(bi_instruction *ins, unsigned s) |
| { |
| bool classy = bi_class_props[ins->type] & BI_SWIZZLABLE; |
| bool small = nir_alu_type_get_type_size(ins->dest_type) < 32; |
| bool first = (s == 0); /* TODO: prop? */ |
| |
| return classy && small && first; |
| } |
| |
| bool |
| bi_has_arg(bi_instruction *ins, unsigned arg) |
| { |
| if (!ins) |
| return false; |
| |
| bi_foreach_src(ins, s) { |
| if (ins->src[s] == arg) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| uint16_t |
| bi_from_bytemask(uint16_t bytemask, unsigned bytes) |
| { |
| unsigned value = 0; |
| |
| for (unsigned c = 0, d = 0; c < 16; c += bytes, ++d) { |
| bool a = (bytemask & (1 << c)) != 0; |
| |
| for (unsigned q = c; q < bytes; ++q) |
| assert(((bytemask & (1 << q)) != 0) == a); |
| |
| value |= (a << d); |
| } |
| |
| return value; |
| } |
| |
| unsigned |
| bi_get_component_count(bi_instruction *ins, signed src) |
| { |
| /* Discards and branches are oddball since they're not BI_VECTOR but no |
| * destination. So special case.. */ |
| if (ins->type == BI_DISCARD || ins->type == BI_BRANCH) |
| return 1; |
| |
| if (bi_class_props[ins->type] & BI_VECTOR) { |
| assert(ins->vector_channels); |
| return (src <= 0) ? ins->vector_channels : 1; |
| } else { |
| unsigned dest_bytes = nir_alu_type_get_type_size(ins->dest_type); |
| unsigned src_bytes = nir_alu_type_get_type_size(ins->src_types[MAX2(src, 0)]); |
| |
| /* If there's either f32 on either end, it's only a single |
| * component, etc. */ |
| |
| unsigned bytes = src < 0 ? dest_bytes : src_bytes; |
| |
| if (ins->type == BI_CONVERT) |
| bytes = MAX2(dest_bytes, src_bytes); |
| |
| if (ins->type == BI_ATEST || ins->type == BI_SELECT) |
| return 1; |
| |
| return MAX2(32 / bytes, 1); |
| } |
| } |
| |
| uint16_t |
| bi_bytemask_of_read_components(bi_instruction *ins, unsigned node) |
| { |
| uint16_t mask = 0x0; |
| |
| bi_foreach_src(ins, s) { |
| if (ins->src[s] != node) continue; |
| unsigned component_count = bi_get_component_count(ins, s); |
| nir_alu_type T = ins->src_types[s]; |
| unsigned size = nir_alu_type_get_type_size(T); |
| unsigned bytes = size / 8; |
| unsigned cmask = (1 << bytes) - 1; |
| |
| for (unsigned i = 0; i < component_count; ++i) { |
| unsigned c = ins->swizzle[s][i]; |
| mask |= (cmask << (c * bytes)); |
| } |
| } |
| |
| return mask; |
| } |
| |
| uint64_t |
| bi_get_immediate(bi_instruction *ins, unsigned index) |
| { |
| unsigned v = ins->src[index]; |
| assert(v & BIR_INDEX_CONSTANT); |
| unsigned shift = v & ~BIR_INDEX_CONSTANT; |
| uint64_t shifted = ins->constant.u64 >> shift; |
| |
| /* Mask off the accessed part */ |
| unsigned sz = nir_alu_type_get_type_size(ins->src_types[index]); |
| |
| if (sz == 64) |
| return shifted; |
| else |
| return shifted & ((1ull << sz) - 1); |
| } |
| |
| bool |
| bi_writes_component(bi_instruction *ins, unsigned comp) |
| { |
| return comp < bi_get_component_count(ins, -1); |
| } |
| |
| unsigned |
| bi_writemask(bi_instruction *ins) |
| { |
| nir_alu_type T = ins->dest_type; |
| unsigned size = nir_alu_type_get_type_size(T); |
| unsigned bytes_per_comp = size / 8; |
| unsigned components = bi_get_component_count(ins, -1); |
| unsigned bytes = bytes_per_comp * components; |
| unsigned mask = (1 << bytes) - 1; |
| unsigned shift = ins->dest_offset * 4; /* 32-bit words */ |
| return (mask << shift); |
| } |