87 lines
1.3 KiB
ArmAsm
87 lines
1.3 KiB
ArmAsm
|
/*
|
||
|
|
* Public domain.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <machine/asm.h>
|
||
|
|
#include <libm-alias-finite.h>
|
||
|
|
|
||
|
|
.section .rodata
|
||
|
|
|
||
|
|
.align ALIGNARG(4)
|
||
|
|
.type zero_nan,@object
|
||
|
|
zero_nan:
|
||
|
|
.double 0.0
|
||
|
|
nan: .byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
|
||
|
|
.byte 0, 0, 0, 0, 0, 0, 0, 0x80
|
||
|
|
.byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
|
||
|
|
ASM_SIZE_DIRECTIVE(zero_nan)
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef PIC
|
||
|
|
# define MO(op) op##@GOTOFF(%ecx)
|
||
|
|
# define MOX(op,x,f) op##@GOTOFF(%ecx,x,f)
|
||
|
|
#else
|
||
|
|
# define MO(op) op
|
||
|
|
# define MOX(op,x,f) op(,x,f)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.text
|
||
|
|
ENTRY(__ieee754_scalbl)
|
||
|
|
fldt 16(%esp)
|
||
|
|
fxam
|
||
|
|
fnstsw
|
||
|
|
fldt 4(%esp)
|
||
|
|
andl $0x4700, %eax
|
||
|
|
cmpl $0x0700, %eax
|
||
|
|
je 1f
|
||
|
|
andl $0x4500, %eax
|
||
|
|
cmpl $0x0100, %eax
|
||
|
|
je 2f
|
||
|
|
fxam
|
||
|
|
fnstsw
|
||
|
|
andl $0x4500, %eax
|
||
|
|
cmpl $0x0100, %eax
|
||
|
|
je 2f
|
||
|
|
fld %st(1)
|
||
|
|
frndint
|
||
|
|
fcomp %st(2)
|
||
|
|
fnstsw
|
||
|
|
sahf
|
||
|
|
jne 4f
|
||
|
|
fscale
|
||
|
|
fstp %st(1)
|
||
|
|
ret
|
||
|
|
|
||
|
|
/* y is -inf */
|
||
|
|
1: fxam
|
||
|
|
#ifdef PIC
|
||
|
|
LOAD_PIC_REG (cx)
|
||
|
|
#endif
|
||
|
|
fnstsw
|
||
|
|
movl 12(%esp), %edx
|
||
|
|
shrl $5, %eax
|
||
|
|
fstp %st
|
||
|
|
fstp %st
|
||
|
|
andl $0x8000, %edx
|
||
|
|
andl $0x0228, %eax
|
||
|
|
cmpl $0x0028, %eax
|
||
|
|
je 4f
|
||
|
|
andl $8, %eax
|
||
|
|
shrl $11, %edx
|
||
|
|
addl %edx, %eax
|
||
|
|
fldl MOX(zero_nan, %eax, 1)
|
||
|
|
ret
|
||
|
|
|
||
|
|
/* The result is NaN; raise an exception for sNaN arguments. */
|
||
|
|
2: faddp
|
||
|
|
ret
|
||
|
|
|
||
|
|
/* Return NaN and raise the invalid exception. */
|
||
|
|
4: fstp %st
|
||
|
|
fstp %st
|
||
|
|
fldz
|
||
|
|
fdiv %st
|
||
|
|
ret
|
||
|
|
END(__ieee754_scalbl)
|
||
|
|
libm_alias_finite (__ieee754_scalbl, __scalbl)
|