fixpt31_32.o \
vector.o \
dc_common.o \
- dce_calcs.o
+ dce_calcs.o \
+ custom_float.o
AMD_DAL_BASICS = $(addprefix $(AMDDALPATH)/dc/basics/,$(BASICS))
--- /dev/null
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2023 Advanced Micro Devices, Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: AMD
+ *
+ */
+#include "dm_services.h"
+#include "custom_float.h"
+
+static bool build_custom_float(struct fixed31_32 value,
+ const struct custom_float_format *format,
+ bool *negative,
+ uint32_t *mantissa,
+ uint32_t *exponenta)
+{
+ uint32_t exp_offset = (1 << (format->exponenta_bits - 1)) - 1;
+
+ const struct fixed31_32 mantissa_constant_plus_max_fraction =
+ dc_fixpt_from_fraction((1LL << (format->mantissa_bits + 1)) - 1,
+ 1LL << format->mantissa_bits);
+
+ struct fixed31_32 mantiss;
+
+ if (dc_fixpt_eq(value, dc_fixpt_zero)) {
+ *negative = false;
+ *mantissa = 0;
+ *exponenta = 0;
+ return true;
+ }
+
+ if (dc_fixpt_lt(value, dc_fixpt_zero)) {
+ *negative = format->sign;
+ value = dc_fixpt_neg(value);
+ } else {
+ *negative = false;
+ }
+
+ if (dc_fixpt_lt(value, dc_fixpt_one)) {
+ uint32_t i = 1;
+
+ do {
+ value = dc_fixpt_shl(value, 1);
+ ++i;
+ } while (dc_fixpt_lt(value, dc_fixpt_one));
+
+ --i;
+
+ if (exp_offset <= i) {
+ *mantissa = 0;
+ *exponenta = 0;
+ return true;
+ }
+
+ *exponenta = exp_offset - i;
+ } else if (dc_fixpt_le(mantissa_constant_plus_max_fraction, value)) {
+ uint32_t i = 1;
+
+ do {
+ value = dc_fixpt_shr(value, 1);
+ ++i;
+ } while (dc_fixpt_lt(mantissa_constant_plus_max_fraction, value));
+
+ *exponenta = exp_offset + i - 1;
+ } else {
+ *exponenta = exp_offset;
+ }
+
+ mantiss = dc_fixpt_sub(value, dc_fixpt_one);
+
+ if (dc_fixpt_lt(mantiss, dc_fixpt_zero) ||
+ dc_fixpt_lt(dc_fixpt_one, mantiss))
+ mantiss = dc_fixpt_zero;
+ else
+ mantiss = dc_fixpt_shl(mantiss, format->mantissa_bits);
+
+ *mantissa = dc_fixpt_floor(mantiss);
+
+ return true;
+}
+
+static bool setup_custom_float(const struct custom_float_format *format,
+ bool negative,
+ uint32_t mantissa,
+ uint32_t exponenta,
+ uint32_t *result)
+{
+ uint32_t i = 0;
+ uint32_t j = 0;
+ uint32_t value = 0;
+
+ /* verification code:
+ * once calculation is ok we can remove it
+ */
+
+ const uint32_t mantissa_mask =
+ (1 << (format->mantissa_bits + 1)) - 1;
+
+ const uint32_t exponenta_mask =
+ (1 << (format->exponenta_bits + 1)) - 1;
+
+ if (mantissa & ~mantissa_mask) {
+ BREAK_TO_DEBUGGER();
+ mantissa = mantissa_mask;
+ }
+
+ if (exponenta & ~exponenta_mask) {
+ BREAK_TO_DEBUGGER();
+ exponenta = exponenta_mask;
+ }
+
+ /* end of verification code */
+
+ while (i < format->mantissa_bits) {
+ uint32_t mask = 1 << i;
+
+ if (mantissa & mask)
+ value |= mask;
+
+ ++i;
+ }
+
+ while (j < format->exponenta_bits) {
+ uint32_t mask = 1 << j;
+
+ if (exponenta & mask)
+ value |= mask << i;
+
+ ++j;
+ }
+
+ if (negative && format->sign)
+ value |= 1 << (i + j);
+
+ *result = value;
+
+ return true;
+}
+
+bool convert_to_custom_float_format(struct fixed31_32 value,
+ const struct custom_float_format *format,
+ uint32_t *result)
+{
+ uint32_t mantissa;
+ uint32_t exponenta;
+ bool negative;
+
+ return build_custom_float(value, format, &negative, &mantissa, &exponenta) &&
+ setup_custom_float(format,
+ negative,
+ mantissa,
+ exponenta,
+ result);
+}
+
CFLAGS_REMOVE_$(AMDDALPATH)/dc/dml/calcs/dcn_calc_auto.o := $(dml_rcflags)
CFLAGS_REMOVE_$(AMDDALPATH)/dc/dml/calcs/dcn_calc_math.o := $(dml_rcflags)
-DML = calcs/custom_float.o calcs/bw_fixed.o
+DML = calcs/bw_fixed.o
ifdef CONFIG_DRM_AMD_DC_FP
DML += display_mode_lib.o display_rq_dlg_helpers.o dml1_display_rq_dlg_calc.o
+++ /dev/null
-/*
- * Copyright 2017 Advanced Micro Devices, Inc.
- *
- * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: AMD
- *
- */
-#include "dm_services.h"
-#include "custom_float.h"
-
-
-static bool build_custom_float(
- struct fixed31_32 value,
- const struct custom_float_format *format,
- bool *negative,
- uint32_t *mantissa,
- uint32_t *exponenta)
-{
- uint32_t exp_offset = (1 << (format->exponenta_bits - 1)) - 1;
-
- const struct fixed31_32 mantissa_constant_plus_max_fraction =
- dc_fixpt_from_fraction(
- (1LL << (format->mantissa_bits + 1)) - 1,
- 1LL << format->mantissa_bits);
-
- struct fixed31_32 mantiss;
-
- if (dc_fixpt_eq(
- value,
- dc_fixpt_zero)) {
- *negative = false;
- *mantissa = 0;
- *exponenta = 0;
- return true;
- }
-
- if (dc_fixpt_lt(
- value,
- dc_fixpt_zero)) {
- *negative = format->sign;
- value = dc_fixpt_neg(value);
- } else {
- *negative = false;
- }
-
- if (dc_fixpt_lt(
- value,
- dc_fixpt_one)) {
- uint32_t i = 1;
-
- do {
- value = dc_fixpt_shl(value, 1);
- ++i;
- } while (dc_fixpt_lt(
- value,
- dc_fixpt_one));
-
- --i;
-
- if (exp_offset <= i) {
- *mantissa = 0;
- *exponenta = 0;
- return true;
- }
-
- *exponenta = exp_offset - i;
- } else if (dc_fixpt_le(
- mantissa_constant_plus_max_fraction,
- value)) {
- uint32_t i = 1;
-
- do {
- value = dc_fixpt_shr(value, 1);
- ++i;
- } while (dc_fixpt_lt(
- mantissa_constant_plus_max_fraction,
- value));
-
- *exponenta = exp_offset + i - 1;
- } else {
- *exponenta = exp_offset;
- }
-
- mantiss = dc_fixpt_sub(
- value,
- dc_fixpt_one);
-
- if (dc_fixpt_lt(
- mantiss,
- dc_fixpt_zero) ||
- dc_fixpt_lt(
- dc_fixpt_one,
- mantiss))
- mantiss = dc_fixpt_zero;
- else
- mantiss = dc_fixpt_shl(
- mantiss,
- format->mantissa_bits);
-
- *mantissa = dc_fixpt_floor(mantiss);
-
- return true;
-}
-
-static bool setup_custom_float(
- const struct custom_float_format *format,
- bool negative,
- uint32_t mantissa,
- uint32_t exponenta,
- uint32_t *result)
-{
- uint32_t i = 0;
- uint32_t j = 0;
-
- uint32_t value = 0;
-
- /* verification code:
- * once calculation is ok we can remove it
- */
-
- const uint32_t mantissa_mask =
- (1 << (format->mantissa_bits + 1)) - 1;
-
- const uint32_t exponenta_mask =
- (1 << (format->exponenta_bits + 1)) - 1;
-
- if (mantissa & ~mantissa_mask) {
- BREAK_TO_DEBUGGER();
- mantissa = mantissa_mask;
- }
-
- if (exponenta & ~exponenta_mask) {
- BREAK_TO_DEBUGGER();
- exponenta = exponenta_mask;
- }
-
- /* end of verification code */
-
- while (i < format->mantissa_bits) {
- uint32_t mask = 1 << i;
-
- if (mantissa & mask)
- value |= mask;
-
- ++i;
- }
-
- while (j < format->exponenta_bits) {
- uint32_t mask = 1 << j;
-
- if (exponenta & mask)
- value |= mask << i;
-
- ++j;
- }
-
- if (negative && format->sign)
- value |= 1 << (i + j);
-
- *result = value;
-
- return true;
-}
-
-bool convert_to_custom_float_format(
- struct fixed31_32 value,
- const struct custom_float_format *format,
- uint32_t *result)
-{
- uint32_t mantissa;
- uint32_t exponenta;
- bool negative;
-
- return build_custom_float(
- value, format, &negative, &mantissa, &exponenta) &&
- setup_custom_float(
- format, negative, mantissa, exponenta, result);
-}
-
-
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