| //===--- fformat.h - Descriptions of floating point formats -------*- C -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This header file contains some macro definitions useful for working with bit |
| // accurate floating point representations. |
| // |
| //===----------------------------------------------------------------------===// |
| #ifndef _FFORMAT_H_ |
| #define _FFORMAT_H_ |
| |
| #define F32_SIGN_BIT 0x80000000U |
| #define F32_EXP_MASK 0x7F800000U |
| #define F32_MANTISSA_MASK 0x007FFFFFU |
| #define F32_MANTISSA_MSB 0x00400000U |
| #define F32_QNAN_BIT F32_MANTISSA_MSB |
| #define F32_PAYLOAD_MASK (F32_MANTISSA_MASK & ~F32_QNAN_BIT) |
| #define F32_SIGN_SHIFT 31 |
| #define F32_EXP_SHIFT 23 |
| #define F32_EXP_SIZE (F32_SIGN_SHIFT - F32_EXP_SHIFT) |
| #define F32_MANTISSA_SIZE F32_EXP_SHIFT |
| #define F32_EXP_BIAS 127 |
| #define F32_EXP_MIN (-126) |
| #define F32_EXP_MAX 127 |
| #define F32_EXP(e) (((e) + F32_EXP_BIAS) << F32_EXP_SHIFT) |
| #define F32_MANTISSA(b1, b2, b3) \ |
| (((b1) ? F32_MANTISSA_MSB : 0) | \ |
| ((b2) ? (F32_MANTISSA_MSB >> 1) : 0) | \ |
| ((b3) ? (F32_MANTISSA_MSB >> 2) : 0)) |
| #define F32_MAKE(s, e, m) \ |
| (((s) ? F32_SIGN_BIT : 0) | \ |
| ((e) & F32_EXP_MASK) | \ |
| ((m) & F32_MANTISSA_MASK)) |
| #define F32_NORMAL(s, e, m) F32_MAKE((s), F32_EXP(e), (m)) |
| |
| |
| #define F64_SIGN_BIT 0x8000000000000000ULL |
| #define F64_EXP_MASK 0x7FF0000000000000ULL |
| #define F64_MANTISSA_MASK 0x000FFFFFFFFFFFFFULL |
| #define F64_MANTISSA_MSB 0x0008000000000000ULL |
| #define F64_QNAN_BIT F64_MANTISSA_MSB |
| #define F64_PAYLOAD_MASK (F64_MANTISSA_MASK & ~F64_QNAN_BIT) |
| #define F64_SIGN_SHIFT 63 |
| #define F64_EXP_SHIFT 52 |
| #define F64_EXP_SIZE (F64_SIGN_SHIFT - F64_EXP_SHIFT) |
| #define F64_MANTISSA_SIZE F64_EXP_SHIFT |
| #define F64_EXP_BIAS 1023 |
| #define F64_EXP_MIN (-1022) |
| #define F64_EXP_MAX 1023 |
| #define F64_EXP(e) (((uint64_t)(e) + F64_EXP_BIAS) << F64_EXP_SHIFT) |
| #define F64_MANTISSA(b1, b2, b3) \ |
| (((b1) ? F64_MANTISSA_MSB : 0) | \ |
| ((b2) ? (F64_MANTISSA_MSB >> 1) : 0) | \ |
| ((b3) ? (F64_MANTISSA_MSB >> 2) : 0)) |
| #define F64_MAKE(s, e, m) \ |
| (((s) ? F64_SIGN_BIT : 0) | \ |
| ((e) & F64_EXP_MASK) | \ |
| ((m) & F64_MANTISSA_MASK)) |
| #define F64_NORMAL(s, e, m) F64_MAKE((s), F64_EXP(e), (m)) |
| |
| #endif |
