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3a312e101c
* Added functions to access and manipulate the fcr31 register * Improved WiiVC emulator check to avoid false positives * Updated comments * Moved float.h to include directory
59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
#ifndef GAME_FLOAT_H
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#define GAME_FLOAT_H
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#include "types.h"
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typedef enum {
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FRC_RM_ROUND_TO_NEAREST = 0x0,
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FRC_RM_ROUND_TO_ZERO = 0x1,
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FRC_RM_ROUND_TO_POSITIVE_INFINITY = 0x2,
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FRC_RM_ROUND_TO_MINUS_INFINITY = 0x3
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} FloatRoundingMode;
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typedef enum {
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FRC_EXCEPTION_INEXACT_OPERATION = 0x1,
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FRC_EXCEPTION_UNDERFLOW = 0x2,
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FRC_EXCEPTION_OVERFLOW = 0x4,
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FRC_EXCEPTION_DIVISION_BY_ZERO = 0x8,
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FRC_EXCEPTION_INVALID_OPERATION = 0x10,
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FRC_EXCEPTION_UNIMPLEMENTED_OPERATION = 0x20 // only for Cause bits
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} FloatExceptionBits;
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extern FloatRoundingMode fcr_get_rounding_mode(void);
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extern void fcr_set_rounding_mode(FloatRoundingMode);
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// Get the Enable bits in FCR31
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extern FloatExceptionBits fcr_get_enabled_exceptions(void);
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// Set the Enable bits in FCR31 to the given bitset
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// NOTE: Ares is currently the only emulator to actually respect the Enable bits.
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// Floating point exceptions will still not occur on other emulators.
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extern void fcr_set_enabled_exceptions(FloatExceptionBits);
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// Set the Enable bits to 1 for the given exception(s). Do not change any other exceptions.
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// NOTE: Ares is currently the only emulator to actually respect the Enable bits.
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// Floating point exceptions will still not occur on other emulators.
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extern void fcr_enable_exceptions(FloatExceptionBits);
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// Set the Enable bits to 0 for the given exception(s). Do not change any other exceptions.
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extern void fcr_disable_exceptions(FloatExceptionBits);
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// Returns TRUE if all of the given exceptions are enabled
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inline Bool32 fcr_check_exceptions_enabled(FloatExceptionBits exceptions) {
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return (fcr_get_enabled_exceptions() & exceptions) == exceptions;
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}
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// Gets the exception(s) raised by the most recently executed floating point instruction
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extern FloatExceptionBits fcr_get_cause(void);
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// Gets the current exception flags. These flags are set when an exception would be raised,
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// but the exception is not currently enabled. They are only cleared by calling fcr_clear_flags.
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// NOTE: This currently will only work on console and Ares. Other emulators will always return 0
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extern FloatExceptionBits fcr_get_flags(void);
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// Clear the current exception flags
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extern void fcr_clear_flags(void);
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#endif
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