src/gallium/drivers/etnaviv/etnaviv_asm.h

   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@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