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[CRT/ARM] Floating point control functions implementation (#3870)

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Implement controlfp, statusfp, fpreset, clearfp. CORE-17757 CORE-17604
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Roman Masanin 2021-08-01 17:30:41 +03:00 • committed by Stanislav Motylkov
parent c188821f8b
commit 554bbb6bab
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13 changed files with 249 additions and 100 deletions
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41
sdk/lib/crt/float/arm/fpscr.h Normal file
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/*
* PROJECT: ReactOS CRT library
* LICENSE: MIT (https://spdx.org/licenses/MIT)
* PURPOSE: Headers for ARM fpcsr
* COPYRIGHT: Copyright 2021 Roman Masanin <36927roma@gmail.com>
*/
#include <float.h>
#define ARM_CW_STATUS_MASK 0x9F
#define ARM_CW_IM (1 << 0) /* Invalid operation mask */
#define ARM_CW_ZM (1 << 1) /* Zero divide mask */
#define ARM_CW_OM (1 << 2) /* Overflow mask */
#define ARM_CW_UM (1 << 3) /* Underflow mask */
#define ARM_CW_PM (1 << 4) /* Precision mask */
#define ARM_CW_DM (1 << 7) /* Denormal operand mask */
#define ARM_CW_RC_NEAREST 0 /* round to nearest */
#define ARM_CW_RC_UP 1 /* round up */
#define ARM_CW_RC_DOWN 2 /* round down */
#define ARM_CW_RC_ZERO 3 /* round toward zero (chop) */
typedef union _ARM_FPSCR
{
unsigned int raw;
struct
{
unsigned int exception: 8;
unsigned int ex_control: 8;
unsigned int len: 3;
unsigned int unused3: 1;
unsigned int stride: 2;
unsigned int rounding_mode: 2;
unsigned int flush_to_zero: 1;
unsigned int unused4: 3;
unsigned int status_flag: 4;
} data;
} ARM_FPSCR;
void __setfp(unsigned int);
unsigned int __getfp(void);