static struct ir2_src_register *
add_src_reg(struct fd2_compile_context *ctx, struct ir2_instruction *alu,
const struct tgsi_src_register *src)
{
static const char swiz_vals[] = {
'x', 'y', 'z', 'w',
};
char swiz[5];
unsigned flags = 0, num = 0;
switch (src->File) {
case TGSI_FILE_CONSTANT:
num = src->Index;
flags |= IR2_REG_CONST;
break;
case TGSI_FILE_INPUT:
if (ctx->type == PIPE_SHADER_VERTEX) {
num = src->Index + 1;
} else {
flags |= IR2_REG_INPUT;
num = export_linkage(ctx,
ctx->input_export_idx[src->Index]);
}
break;
case TGSI_FILE_TEMPORARY:
num = get_temp_gpr(ctx, src->Index);
break;
case TGSI_FILE_IMMEDIATE:
num = src->Index + ctx->num_regs[TGSI_FILE_CONSTANT];
flags |= IR2_REG_CONST;
break;
default:
DBG("unsupported src register file: %s",
tgsi_file_name(src->File));
assert(0);
break;
}
if (src->Absolute)
flags |= IR2_REG_ABS;
if (src->Negate)
flags |= IR2_REG_NEGATE;
swiz[0] = swiz_vals[src->SwizzleX];
swiz[1] = swiz_vals[src->SwizzleY];
swiz[2] = swiz_vals[src->SwizzleZ];
swiz[3] = swiz_vals[src->SwizzleW];
swiz[4] = '\0';
if ((ctx->need_sync & ((uint64_t)1 << num)) &&
!(flags & IR2_REG_CONST)) {
alu->sync = true;
ctx->need_sync &= ~((uint64_t)1 << num);
}
return ir2_reg_create(alu, num, swiz, flags);
}
static struct ir2_register *
add_dst_reg(struct fd2_compile_context *ctx, struct ir2_instruction *alu,
const struct tgsi_dst_register *dst)
{
unsigned flags = 0, num = 0;
char swiz[5];
switch (dst->File) {
case TGSI_FILE_OUTPUT:
flags |= IR2_REG_EXPORT;
if (ctx->type == PIPE_SHADER_VERTEX) {
if (dst->Index == ctx->position) {
num = 62;
} else if (dst->Index == ctx->psize) {
num = 63;
} else {
num = export_linkage(ctx,
ctx->output_export_idx[dst->Index]);
}
} else {
num = dst->Index;
}
break;
case TGSI_FILE_TEMPORARY:
num = get_temp_gpr(ctx, dst->Index);
break;
default:
DBG("unsupported dst register file: %s",
tgsi_file_name(dst->File));
assert(0);
break;
}
swiz[0] = (dst->WriteMask & TGSI_WRITEMASK_X) ? 'x' : '_';
swiz[1] = (dst->WriteMask & TGSI_WRITEMASK_Y) ? 'y' : '_';
swiz[2] = (dst->WriteMask & TGSI_WRITEMASK_Z) ? 'z' : '_';
swiz[3] = (dst->WriteMask & TGSI_WRITEMASK_W) ? 'w' : '_';
swiz[4] = '\0';
return ir2_reg_create(alu, num, swiz, flags);
}
