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e500 port: fpu_control.h.

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This commit is contained in:
Joseph Myers
2013-09-18 14:47:49 +00:00
parent 2e071de0f7
commit 24d22e65b3
2 changed files with 61 additions and 1 deletions
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39
sysdeps/powerpc/fpu_control.h
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@ -19,7 +19,7 @@
#ifndef _FPU_CONTROL_H
#define _FPU_CONTROL_H
#if defined _SOFT_FLOAT || defined __NO_FPRS__
#ifdef _SOFT_FLOAT
# define _FPU_RESERVED 0xffffffff
# define _FPU_DEFAULT 0x00000000 /* Default value. */
@ -28,6 +28,43 @@ typedef unsigned int fpu_control_t;
# define _FPU_SETCW(cw) (void) (cw)
extern fpu_control_t __fpu_control;
#elif defined __NO_FPRS__ /* e500 */
/* rounding control */
# define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
# define _FPU_RC_DOWN 0x03
# define _FPU_RC_UP 0x02
# define _FPU_RC_ZERO 0x01
/* masking of interrupts */
# define _FPU_MASK_ZM 0x10 /* zero divide */
# define _FPU_MASK_OM 0x40 /* overflow */
# define _FPU_MASK_UM 0x80 /* underflow */
# define _FPU_MASK_XM 0x40 /* inexact */
# define _FPU_MASK_IM 0x20 /* invalid operation */
# define _FPU_RESERVED 0xff3fff7f /* These bits are reserved and not changed. */
/* The fdlibm code requires no interrupts for exceptions. */
# define _FPU_DEFAULT 0x00000000 /* Default value. */
/* IEEE: same as above, but (some) exceptions;
we leave the 'inexact' exception off.
*/
# define _FPU_IEEE 0x000003c0
/* Type of the control word. */
typedef unsigned int fpu_control_t;
/* Macros for accessing the hardware control word. */
# define _FPU_GETCW(cw) \
__asm__ volatile ("mfspefscr %0" : "=r" (cw))
# define _FPU_SETCW(cw) \
__asm__ volatile ("mtspefscr %0" : : "r" (cw))
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
#else /* PowerPC 6xx floating-point. */
/* rounding control */