/*
 * Copyright (C) 2018-2019 Alyssa Rosenzweig <alyssa@rosenzweig.io>
 * Copyright (C) 2019-2020 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 <math.h>
#include <inttypes.h>
#include "util/half_float.h"
#include "midgard.h"
#include "helpers.h"
#include "midgard_ops.h"

void
mir_print_constant_component(FILE *fp, const midgard_constants *consts, unsigned c,
                             midgard_reg_mode reg_mode, bool half,
                             unsigned mod, midgard_alu_op op)
{
        bool is_sint = false, is_uint = false, is_hex = false;
        const char *opname = alu_opcode_props[op].name;

        /* Add a sentinel name to prevent crashing */
        if (!opname)
                opname = "unknown";

        if (opname[0] == 'u') {
                /* If the opcode starts with a 'u' we are sure we deal with an
                 * unsigned int operation
		 */
                is_uint = true;
	} else if (opname[0] == 'i') {
                /* Bit ops are easier to follow when the constant is printed in
                 * hexadecimal. Other operations starting with a 'i' are
                 * considered to operate on signed integers. That might not
                 * be true for all of them, but it's good enough for traces.
                 */
                if (op >= midgard_alu_op_iand &&
                    op <= midgard_alu_op_ibitcount8)
                        is_hex = true;
                else
                        is_sint = true;
        }

        if (half)
                reg_mode--;

        switch (reg_mode) {
        case midgard_reg_mode_64:
                if (is_sint) {
                        fprintf(fp, "%"PRIi64, consts->i64[c]);
                } else if (is_uint) {
                        fprintf(fp, "%"PRIu64, consts->u64[c]);
                } else if (is_hex) {
                        fprintf(fp, "0x%"PRIX64, consts->u64[c]);
                } else {
                        double v = consts->f64[c];

                        if (mod & MIDGARD_FLOAT_MOD_ABS) v = fabs(v);
                        if (mod & MIDGARD_FLOAT_MOD_NEG) v = -v;

                        printf("%g", v);
                }
                break;

        case midgard_reg_mode_32:
                if (is_sint) {
                        int64_t v;

                        if (half && mod == midgard_int_zero_extend)
                                v = consts->u32[c];
                        else if (half && mod == midgard_int_shift)
                                v = (uint64_t)consts->u32[c] << 32;
                        else
                                v = consts->i32[c];

                        fprintf(fp, "%"PRIi64, v);
                } else if (is_uint || is_hex) {
                        uint64_t v;

                        if (half && mod == midgard_int_shift)
                                v = (uint64_t)consts->u32[c] << 32;
                        else
                                v = consts->u32[c];

                        fprintf(fp, is_uint ? "%"PRIu64 : "0x%"PRIX64, v);
                } else {
                        float v = consts->f32[c];

                        if (mod & MIDGARD_FLOAT_MOD_ABS) v = fabsf(v);
                        if (mod & MIDGARD_FLOAT_MOD_NEG) v = -v;

                        fprintf(fp, "%g", v);
                }
                break;

        case midgard_reg_mode_16:
                if (is_sint) {
                        int32_t v;

                        if (half && mod == midgard_int_zero_extend)
                                v = consts->u16[c];
                        else if (half && mod == midgard_int_shift)
                                v = (uint32_t)consts->u16[c] << 16;
                        else
                                v = consts->i16[c];

                        fprintf(fp, "%d", v);
                } else if (is_uint || is_hex) {
                        uint32_t v;

                        if (half && mod == midgard_int_shift)
                                v = (uint32_t)consts->u16[c] << 16;
                        else
                                v = consts->u16[c];

                        fprintf(fp, is_uint ? "%u" : "0x%X", v);
                } else {
                        float v = _mesa_half_to_float(consts->f16[c]);

                        if (mod & MIDGARD_FLOAT_MOD_ABS) v = fabsf(v);
                        if (mod & MIDGARD_FLOAT_MOD_NEG) v = -v;

                        fprintf(fp, "%g", v);
                }
                break;

        case midgard_reg_mode_8:
                fprintf(fp, "0x%X", consts->u8[c]);

                if (mod)
                        fprintf(fp, " /* %u */", mod);

                assert(!half); /* No 4-bit */

                break;
        }
}