| /* |
| * 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. |
| */ |
| |
| #include "compiler.h" |
| #include "bi_builder.h" |
| |
| /* Not all 8-bit and 16-bit instructions support all swizzles on all sources. |
| * These passes, intended to run after NIR->BIR but before scheduling/RA, lower |
| * away swizzles that cannot be represented. In the future, we should try to |
| * recombine swizzles where we can as an optimization. |
| */ |
| |
| static void |
| bi_lower_swizzle_16(bi_context *ctx, bi_instr *ins, unsigned src) |
| { |
| /* TODO: Use the opcode table and be a lot more methodical about this... */ |
| switch (ins->op) { |
| case BI_OPCODE_CSEL_V2F16: |
| case BI_OPCODE_CSEL_V2I16: |
| case BI_OPCODE_CSEL_V2S16: |
| case BI_OPCODE_CSEL_V2U16: |
| break; |
| case BI_OPCODE_IADD_V2S16: |
| case BI_OPCODE_IADD_V2U16: |
| case BI_OPCODE_ISUB_V2S16: |
| case BI_OPCODE_ISUB_V2U16: |
| if (src == 0 && ins->src[src].swizzle != BI_SWIZZLE_H10) |
| break; |
| else |
| return; |
| case BI_OPCODE_LSHIFT_AND_V2I16: |
| case BI_OPCODE_LSHIFT_OR_V2I16: |
| case BI_OPCODE_LSHIFT_XOR_V2I16: |
| case BI_OPCODE_RSHIFT_AND_V2I16: |
| case BI_OPCODE_RSHIFT_OR_V2I16: |
| case BI_OPCODE_RSHIFT_XOR_V2I16: |
| if (src == 2) |
| return; |
| else |
| break; |
| default: |
| return; |
| } |
| |
| /* Identity is ok (TODO: what about replicate only?) */ |
| if (ins->src[src].swizzle == BI_SWIZZLE_H01) |
| return; |
| |
| /* Lower it away */ |
| bi_builder b = bi_init_builder(ctx, bi_before_instr(ins)); |
| ins->src[src] = bi_replace_index(ins->src[src], |
| bi_swz_v2i16(&b, ins->src[src])); |
| ins->src[src].swizzle = BI_SWIZZLE_H01; |
| } |
| |
| void |
| bi_lower_swizzle(bi_context *ctx) |
| { |
| bi_foreach_instr_global_safe(ctx, ins) { |
| bi_foreach_src(ins, s) { |
| if (!bi_is_null(ins->src[s])) |
| bi_lower_swizzle_16(ctx, ins, s); |
| } |
| } |
| } |