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/*
* Copyright (c) 2012-2015 Etnaviv Project
*
* 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, sub license,
* 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 NON-INFRINGEMENT. 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:
* Wladimir J. van der Laan <laanwj@gmail.com>
*/
#include "etnaviv_asm.h"
#include "etnaviv_debug.h"
#include "etnaviv_util.h"
/* An instruction can only read from one distinct uniform.
* This function verifies this property and returns true if the instruction
* is deemed correct and false otherwise.
*/
static bool
check_uniforms(const struct etna_inst *inst)
{
unsigned uni_rgroup = -1;
unsigned uni_reg = -1;
bool conflict = false;
for (unsigned i = 0; i < ETNA_NUM_SRC; i++) {
const struct etna_inst_src *src = &inst->src[i];
if (!etna_rgroup_is_uniform(src->rgroup))
continue;
if (uni_reg == -1) { /* first uniform used */
uni_rgroup = src->rgroup;
uni_reg = src->reg;
} else { /* second or later; check that it is a re-use */
if (uni_rgroup != src->rgroup || uni_reg != src->reg) {
conflict = true;
}
}
}
return !conflict;
}
int
etna_assemble(uint32_t *out, const struct etna_inst *inst)
{
/* cannot have both src2 and imm */
if (inst->imm && inst->src[2].use)
return 1;
if (!check_uniforms(inst))
BUG("error: generating instruction that accesses two different uniforms");
out[0] = VIV_ISA_WORD_0_OPCODE(inst->opcode) |
VIV_ISA_WORD_0_COND(inst->cond) |
COND(inst->sat, VIV_ISA_WORD_0_SAT) |
COND(inst->dst.use, VIV_ISA_WORD_0_DST_USE) |
VIV_ISA_WORD_0_DST_AMODE(inst->dst.amode) |
VIV_ISA_WORD_0_DST_REG(inst->dst.reg) |
VIV_ISA_WORD_0_DST_COMPS(inst->dst.comps) |
VIV_ISA_WORD_0_TEX_ID(inst->tex.id);
out[1] = VIV_ISA_WORD_1_TEX_AMODE(inst->tex.amode) |
VIV_ISA_WORD_1_TEX_SWIZ(inst->tex.swiz) |
COND(inst->src[0].use, VIV_ISA_WORD_1_SRC0_USE) |
VIV_ISA_WORD_1_SRC0_REG(inst->src[0].reg) |
COND(inst->type & 0x4, VIV_ISA_WORD_1_TYPE_BIT2) |
VIV_ISA_WORD_1_SRC0_SWIZ(inst->src[0].swiz) |
COND(inst->src[0].neg, VIV_ISA_WORD_1_SRC0_NEG) |
COND(inst->src[0].abs, VIV_ISA_WORD_1_SRC0_ABS);
out[2] = VIV_ISA_WORD_2_SRC0_AMODE(inst->src[0].amode) |
VIV_ISA_WORD_2_SRC0_RGROUP(inst->src[0].rgroup) |
COND(inst->src[1].use, VIV_ISA_WORD_2_SRC1_USE) |
VIV_ISA_WORD_2_SRC1_REG(inst->src[1].reg) |
VIV_ISA_WORD_2_SRC1_SWIZ(inst->src[1].swiz) |
COND(inst->src[1].neg, VIV_ISA_WORD_2_SRC1_NEG) |
COND(inst->src[1].abs, VIV_ISA_WORD_2_SRC1_ABS) |
VIV_ISA_WORD_2_SRC1_AMODE(inst->src[1].amode) |
VIV_ISA_WORD_2_TYPE_BIT01(inst->type & 0x3);
out[3] = VIV_ISA_WORD_3_SRC1_RGROUP(inst->src[1].rgroup) |
COND(inst->src[2].use, VIV_ISA_WORD_3_SRC2_USE) |
VIV_ISA_WORD_3_SRC2_REG(inst->src[2].reg) |
VIV_ISA_WORD_3_SRC2_SWIZ(inst->src[2].swiz) |
COND(inst->src[2].neg, VIV_ISA_WORD_3_SRC2_NEG) |
COND(inst->src[2].abs, VIV_ISA_WORD_3_SRC2_ABS) |
VIV_ISA_WORD_3_SRC2_AMODE(inst->src[2].amode) |
VIV_ISA_WORD_3_SRC2_RGROUP(inst->src[2].rgroup);
out[3] |= VIV_ISA_WORD_3_SRC2_IMM(inst->imm);
return 0;
}
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