1 /* 2 * Copyright (c) 2012-2015 Etnaviv Project 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sub license, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the 12 * next paragraph) shall be included in all copies or substantial portions 13 * of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Wladimir J. van der Laan <laanwj (at) gmail.com> 25 */ 26 27 #ifndef H_ETNAVIV_ASM 28 #define H_ETNAVIV_ASM 29 30 #include <stdint.h> 31 #include "hw/isa.xml.h" 32 33 /* Size of an instruction in 32-bit words */ 34 #define ETNA_INST_SIZE (4) 35 /* Number of source operands per instruction */ 36 #define ETNA_NUM_SRC (3) 37 38 /* Broadcast swizzle to all four components */ 39 #define INST_SWIZ_BROADCAST(x) \ 40 (INST_SWIZ_X(x) | INST_SWIZ_Y(x) | INST_SWIZ_Z(x) | INST_SWIZ_W(x)) 41 /* Identity (NOP) swizzle */ 42 #define INST_SWIZ_IDENTITY \ 43 (INST_SWIZ_X(0) | INST_SWIZ_Y(1) | INST_SWIZ_Z(2) | INST_SWIZ_W(3)) 44 /* Fully specified swizzle */ 45 #define INST_SWIZ(x,y,z,w) \ 46 (INST_SWIZ_X(x) | INST_SWIZ_Y(y) | INST_SWIZ_Z(z) | INST_SWIZ_W(w)) 47 #define SWIZZLE(c0,c1,c2,c3) \ 48 INST_SWIZ(INST_SWIZ_COMP_##c0, \ 49 INST_SWIZ_COMP_##c1, \ 50 INST_SWIZ_COMP_##c2, \ 51 INST_SWIZ_COMP_##c3) 52 53 /*** operands ***/ 54 55 /* destination operand */ 56 struct etna_inst_dst { 57 unsigned use:1; /* 0: not in use, 1: in use */ 58 unsigned amode:3; /* INST_AMODE_* */ 59 unsigned reg:7; /* register number 0..127 */ 60 unsigned comps:4; /* INST_COMPS_* */ 61 }; 62 63 /* texture operand */ 64 struct etna_inst_tex { 65 unsigned id:5; /* sampler id */ 66 unsigned amode:3; /* INST_AMODE_* */ 67 unsigned swiz:8; /* INST_SWIZ */ 68 }; 69 70 /* source operand */ 71 struct etna_inst_src { 72 unsigned use:1; /* 0: not in use, 1: in use */ 73 unsigned reg:9; /* register or uniform number 0..511 */ 74 unsigned swiz:8; /* INST_SWIZ */ 75 unsigned neg:1; /* negate (flip sign) if set */ 76 unsigned abs:1; /* absolute (remove sign) if set */ 77 unsigned amode:3; /* INST_AMODE_* */ 78 unsigned rgroup:3; /* INST_RGROUP_* */ 79 }; 80 81 /*** instruction ***/ 82 struct etna_inst { 83 uint8_t opcode; /* INST_OPCODE_* */ 84 uint8_t type; /* INST_TYPE_* */ 85 unsigned cond:5; /* INST_CONDITION_* */ 86 unsigned sat:1; /* saturate result between 0..1 */ 87 struct etna_inst_dst dst; /* destination operand */ 88 struct etna_inst_tex tex; /* texture operand */ 89 struct etna_inst_src src[ETNA_NUM_SRC]; /* source operand */ 90 unsigned imm; /* takes place of src[2] for BRANCH/CALL */ 91 }; 92 93 /* Compose two swizzles (computes swz1.swz2) */ 94 static inline uint32_t inst_swiz_compose(uint32_t swz1, uint32_t swz2) 95 { 96 return INST_SWIZ_X((swz1 >> (((swz2 >> 0)&3)*2))&3) | 97 INST_SWIZ_Y((swz1 >> (((swz2 >> 2)&3)*2))&3) | 98 INST_SWIZ_Z((swz1 >> (((swz2 >> 4)&3)*2))&3) | 99 INST_SWIZ_W((swz1 >> (((swz2 >> 6)&3)*2))&3); 100 }; 101 102 /* Return whether the rgroup is one of the uniforms */ 103 static inline int 104 etna_rgroup_is_uniform(unsigned rgroup) 105 { 106 return rgroup == INST_RGROUP_UNIFORM_0 || 107 rgroup == INST_RGROUP_UNIFORM_1; 108 } 109 110 /** 111 * Build vivante instruction from structure with 112 * opcode, cond, sat, dst_use, dst_amode, 113 * dst_reg, dst_comps, tex_id, tex_amode, tex_swiz, 114 * src[0-2]_reg, use, swiz, neg, abs, amode, rgroup, 115 * imm 116 * 117 * Return 0 if successful, and a non-zero 118 * value otherwise. 119 */ 120 int 121 etna_assemble(uint32_t *out, const struct etna_inst *inst); 122 123 /** 124 * Set field imm of already-assembled instruction. 125 * This is used for filling in jump destinations in a separate pass. 126 */ 127 static inline void 128 etna_assemble_set_imm(uint32_t *out, uint32_t imm) 129 { 130 out[3] |= VIV_ISA_WORD_3_SRC2_IMM(imm); 131 } 132 133 #endif 134
