Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-/* Reacros modifications */
+/* Reactos modifications */
+#include <reactos/asm.h>
+
#define ALIGNARG(log2) log2
#define ASM_TYPE_DIRECTIVE(name,typearg)
#define ASM_SIZE_DIRECTIVE(name)
#define cfi_adjust_cfa_offset(x)
-#define ENTRY(x)
-#define END(x)
-.global _pow
+PUBLIC _pow
+
+ .data
.text
+ASSUME CS:NOTHING, DS:NOTHING, ES:NOTHING, FS:NOTHING, GS:NOTHING
.align ALIGNARG(4)
ASM_TYPE_DIRECTIVE(infinity,@object)
+
inf_zero:
infinity:
- .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f
+ .byte 0, 0, 0, 0, 0, 0, HEX(f0), HEX(7f)
ASM_SIZE_DIRECTIVE(infinity)
ASM_TYPE_DIRECTIVE(zero,@object)
-zero: .double 0.0
+zero:
+ .double 0.0
ASM_SIZE_DIRECTIVE(zero)
ASM_TYPE_DIRECTIVE(minf_mzero,@object)
+
minf_mzero:
minfinity:
- .byte 0, 0, 0, 0, 0, 0, 0xf0, 0xff
+ .byte 0, 0, 0, 0, 0, 0, HEX(f0), HEX(ff)
+
mzero:
- .byte 0, 0, 0, 0, 0, 0, 0, 0x80
+ .byte 0, 0, 0, 0, 0, 0, 0, HEX(80)
ASM_SIZE_DIRECTIVE(minf_mzero)
ASM_TYPE_DIRECTIVE(one,@object)
-one: .double 1.0
+
+one:
+ .double 1.0
ASM_SIZE_DIRECTIVE(one)
ASM_TYPE_DIRECTIVE(limit,@object)
-limit: .double 0.29
+
+limit:
+ .double 0.29
ASM_SIZE_DIRECTIVE(limit)
ASM_TYPE_DIRECTIVE(p63,@object)
-p63: .byte 0, 0, 0, 0, 0, 0, 0xe0, 0x43
+
+p63:
+ .byte 0, 0, 0, 0, 0, 0, HEX(e0), HEX(43)
ASM_SIZE_DIRECTIVE(p63)
#ifdef PIC
#define MOX(op,x,f) op##@GOTOFF(%ecx,x,f)
#else
#define MO(op) op
-#define MOX(op,x,f) op(,x,f)
+#define MOX(op,x,f) op[x*f]
#endif
+ .code
.text
_pow:
-ENTRY(__ieee754_pow)
- fldl 12(%esp) // y
+ fld qword ptr [esp + 12] // y
fxam
#ifdef PIC
LOAD_PIC_REG (cx)
#endif
- fnstsw
- movb %ah, %dl
- andb $0x45, %ah
- cmpb $0x40, %ah // is y == 0 ?
- je 11f
+ fnstsw ax
+ mov dl, ah
+ and ah, HEX(045)
+ cmp ah, HEX(040) // is y == 0 ?
+ je L11
- cmpb $0x05, %ah // is y == ±inf ?
- je 12f
+ cmp ah, 5 // is y == ±inf ?
+ je L12
- cmpb $0x01, %ah // is y == NaN ?
- je 30f
+ cmp ah, 1 // is y == NaN ?
+ je L30
- fldl 4(%esp) // x : y
+ fld qword ptr [esp + 4] // x : y
- subl $8,%esp
+ sub esp, 8
cfi_adjust_cfa_offset (8)
fxam
- fnstsw
- movb %ah, %dh
- andb $0x45, %ah
- cmpb $0x40, %ah
- je 20f // x is ±0
+ fnstsw ax
+ mov dh, ah
+ and ah, HEX(45)
+ cmp ah, HEX(040)
+ je L20 // x is ±0
- cmpb $0x05, %ah
- je 15f // x is ±inf
+ cmp ah, 5
+ je L15 // x is ±inf
- fxch // y : x
+ fxch st(1) // y : x
/* fistpll raises invalid exception for |y| >= 1L<<63. */
- fld %st // y : y : x
+ fld st // y : y : x
fabs // |y| : y : x
- fcompl MO(p63) // y : x
- fnstsw
+ fcomp qword ptr MO(p63) // y : x
+ fnstsw ax
sahf
- jnc 2f
+ jnc L2
/* First see whether `y' is a natural number. In this case we
can use a more precise algorithm. */
- fld %st // y : y : x
- fistpll (%esp) // y : x
- fildll (%esp) // int(y) : y : x
- fucomp %st(1) // y : x
- fnstsw
+ fld st // y : y : x
+ fistp qword ptr [esp] // y : x
+ fild qword ptr [esp] // int(y) : y : x
+ fucomp st(1) // y : x
+ fnstsw ax
sahf
- jne 2f
+ jne L2
/* OK, we have an integer value for y. */
- popl %eax
+ pop eax
cfi_adjust_cfa_offset (-4)
- popl %edx
+ pop edx
cfi_adjust_cfa_offset (-4)
- orl $0, %edx
- fstp %st(0) // x
- jns 4f // y >= 0, jump
- fdivrl MO(one) // 1/x (now referred to as x)
- negl %eax
- adcl $0, %edx
- negl %edx
-4: fldl MO(one) // 1 : x
- fxch
-
-6: shrdl $1, %edx, %eax
- jnc 5f
- fxch
- fmul %st(1) // x : ST*x
- fxch
-5: fmul %st(0), %st // x*x : ST*x
- shrl $1, %edx
- movl %eax, %ecx
- orl %edx, %ecx
- jnz 6b
- fstp %st(0) // ST*x
+ or edx, 0
+ fstp st // x
+ jns L4 // y >= 0, jump
+ fdivr qword ptr MO(one) // 1/x (now referred to as x)
+ neg eax
+ adc edx, 0
+ neg edx
+L4: fld qword ptr MO(one) // 1 : x
+ fxch st(1)
+
+L6: shrd eax, edx, 1
+ jnc L5
+ fxch st(1)
+ fmul st, st(1) // x : ST*x
+ fxch st(1)
+L5: fmul st, st // x*x : ST*x
+ shr edx, 1
+ mov ecx, eax
+ or ecx, edx
+ jnz L6
+ fstp st // ST*x
ret
/* y is ±NAN */
-30: fldl 4(%esp) // x : y
- fldl MO(one) // 1.0 : x : y
- fucomp %st(1) // x : y
- fnstsw
+L30:
+ fld qword ptr [esp + 4] // x : y
+ fld qword ptr MO(one) // 1.0 : x : y
+ fucomp st(1) // x : y
+ fnstsw ax
sahf
- je 31f
- fxch // y : x
-31: fstp %st(1)
+ je L31
+ fxch st(1) // y : x
+L31:fstp st(1)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
-2: /* y is a real number. */
- fxch // x : y
- fldl MO(one) // 1.0 : x : y
- fldl MO(limit) // 0.29 : 1.0 : x : y
- fld %st(2) // x : 0.29 : 1.0 : x : y
- fsub %st(2) // x-1 : 0.29 : 1.0 : x : y
+L2: /* y is a real number. */
+ fxch st(1) // x : y
+ fld qword ptr MO(one) // 1.0 : x : y
+ fld qword ptr MO(limit) // 0.29 : 1.0 : x : y
+ fld st(2) // x : 0.29 : 1.0 : x : y
+ fsub st, st(2) // x-1 : 0.29 : 1.0 : x : y
fabs // |x-1| : 0.29 : 1.0 : x : y
fucompp // 1.0 : x : y
- fnstsw
- fxch // x : 1.0 : y
+ fnstsw ax
+ fxch st(1) // x : 1.0 : y
sahf
- ja 7f
- fsub %st(1) // x-1 : 1.0 : y
+ ja L7
+ fsub st, st(1) // x-1 : 1.0 : y
fyl2xp1 // log2(x) : y
- jmp 8f
+ jmp L8
-7: fyl2x // log2(x) : y
-8: fmul %st(1) // y*log2(x) : y
- fst %st(1) // y*log2(x) : y*log2(x)
+L7: fyl2x // log2(x) : y
+L8: fmul st, st(1) // y*log2(x) : y
+ fst st(1) // y*log2(x) : y*log2(x)
frndint // int(y*log2(x)) : y*log2(x)
- fsubr %st, %st(1) // int(y*log2(x)) : fract(y*log2(x))
+ fsubr st(1), st // int(y*log2(x)) : fract(y*log2(x))
fxch // fract(y*log2(x)) : int(y*log2(x))
f2xm1 // 2^fract(y*log2(x))-1 : int(y*log2(x))
- faddl MO(one) // 2^fract(y*log2(x)) : int(y*log2(x))
+ fadd qword ptr MO(one) // 2^fract(y*log2(x)) : int(y*log2(x))
fscale // 2^fract(y*log2(x))*2^int(y*log2(x)) : int(y*log2(x))
- addl $8, %esp
+ add esp, 8
cfi_adjust_cfa_offset (-8)
- fstp %st(1) // 2^fract(y*log2(x))*2^int(y*log2(x))
+ fstp st(1) // 2^fract(y*log2(x))*2^int(y*log2(x))
ret
// pow(x,±0) = 1
.align ALIGNARG(4)
-11: fstp %st(0) // pop y
- fldl MO(one)
+L11:fstp st(0) // pop y
+ fld qword ptr MO(one)
ret
// y == ±inf
.align ALIGNARG(4)
-12: fstp %st(0) // pop y
- fldl MO(one) // 1
- fldl 4(%esp) // x : 1
+L12: fstp st(0) // pop y
+ fld qword ptr MO(one) // 1
+ fld qword ptr [esp + 4] // x : 1
fabs // abs(x) : 1
fucompp // < 1, == 1, or > 1
- fnstsw
- andb $0x45, %ah
- cmpb $0x45, %ah
- je 13f // jump if x is NaN
-
- cmpb $0x40, %ah
- je 14f // jump if |x| == 1
-
- shlb $1, %ah
- xorb %ah, %dl
- andl $2, %edx
- fldl MOX(inf_zero, %edx, 4)
+ fnstsw ax
+ and ah, HEX(45)
+ cmp ah, HEX(45)
+ je L13 // jump if x is NaN
+
+ cmp ah, HEX(40)
+ je L14 // jump if |x| == 1
+
+ shl ah, 1
+ xor dl, ah
+ and edx, 2
+ fld qword ptr MOX(inf_zero, edx, 4)
ret
.align ALIGNARG(4)
-14: fldl MO(one)
+L14:fld qword ptr MO(one)
ret
.align ALIGNARG(4)
-13: fldl 4(%esp) // load x == NaN
+L13:fld qword ptr [esp + 4] // load x == NaN
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
// x is ±inf
-15: fstp %st(0) // y
- testb $2, %dh
- jz 16f // jump if x == +inf
+L15: fstp st(0) // y
+ test dh, 2
+ jz L16 // jump if x == +inf
// We must find out whether y is an odd integer.
- fld %st // y : y
- fistpll (%esp) // y
- fildll (%esp) // int(y) : y
+ fld st // y : y
+ fistp qword ptr [esp] // y
+ fild qword ptr [esp] // int(y) : y
fucompp // <empty>
- fnstsw
+ fnstsw ax
sahf
- jne 17f
+ jne L17
// OK, the value is an integer, but is the number of bits small
// enough so that all are coming from the mantissa?
- popl %eax
+ pop eax
cfi_adjust_cfa_offset (-4)
- popl %edx
+ pop edx
cfi_adjust_cfa_offset (-4)
- andb $1, %al
- jz 18f // jump if not odd
- movl %edx, %eax
- orl %edx, %edx
- jns 155f
- negl %eax
-155: cmpl $0x00200000, %eax
- ja 18f // does not fit in mantissa bits
+ and al, 1
+ jz L18 // jump if not odd
+ mov eax, edx
+ or edx, edx
+ jns L155
+ neg eax
+L155:
+ cmp eax, HEX(000200000)
+ ja L18 // does not fit in mantissa bits
// It's an odd integer.
- shrl $31, %edx
- fldl MOX(minf_mzero, %edx, 8)
+ shr edx, 31
+ fld qword ptr MOX(minf_mzero, edx, 8)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
-16: fcompl MO(zero)
- addl $8, %esp
+L16:fcomp qword ptr MO(zero)
+ add esp, 8
cfi_adjust_cfa_offset (-8)
- fnstsw
- shrl $5, %eax
- andl $8, %eax
- fldl MOX(inf_zero, %eax, 1)
+ fnstsw ax
+ shr eax, 5
+ and eax, 8
+ fld qword ptr MOX(inf_zero, eax, 1)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
-17: shll $30, %edx // sign bit for y in right position
- addl $8, %esp
+L17: shl ecx, 30 // sign bit for y in right position
+ add esp, 8
cfi_adjust_cfa_offset (-8)
-18: shrl $31, %edx
- fldl MOX(inf_zero, %edx, 8)
+L18: shr edx, 31
+ fld qword ptr MOX(inf_zero, edx, 8)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
// x is ±0
-20: fstp %st(0) // y
- testb $2, %dl
- jz 21f // y > 0
+L20: fstp st(0) // y
+ test dl, 2
+ jz L21 // y > 0
// x is ±0 and y is < 0. We must find out whether y is an odd integer.
- testb $2, %dh
- jz 25f
+ test dh, 2
+ jz L25
- fld %st // y : y
- fistpll (%esp) // y
- fildll (%esp) // int(y) : y
+ fld st // y : y
+ fistp qword ptr [esp] // y
+ fild qword ptr [esp] // int(y) : y
fucompp // <empty>
- fnstsw
+ fnstsw ax
sahf
- jne 26f
+ jne L26
// OK, the value is an integer, but is the number of bits small
// enough so that all are coming from the mantissa?
- popl %eax
+ pop eax
cfi_adjust_cfa_offset (-4)
- popl %edx
+ pop edx
cfi_adjust_cfa_offset (-4)
- andb $1, %al
- jz 27f // jump if not odd
- cmpl $0xffe00000, %edx
- jbe 27f // does not fit in mantissa bits
+ and al, 1
+ jz L27 // jump if not odd
+ cmp edx, HEX(0ffe00000)
+ jbe L27 // does not fit in mantissa bits
// It's an odd integer.
// Raise divide-by-zero exception and get minus infinity value.
- fldl MO(one)
- fdivl MO(zero)
+ fld qword ptr MO(one)
+ fdiv qword ptr MO(zero)
fchs
ret
cfi_adjust_cfa_offset (8)
-25: fstp %st(0)
-26: addl $8, %esp
+L25: fstp st(0)
+L26: add esp, 8
cfi_adjust_cfa_offset (-8)
-27: // Raise divide-by-zero exception and get infinity value.
- fldl MO(one)
- fdivl MO(zero)
+L27: // Raise divide-by-zero exception and get infinity value.
+ fld qword ptr MO(one)
+ fdiv qword ptr MO(zero)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
// x is ±0 and y is > 0. We must find out whether y is an odd integer.
-21: testb $2, %dh
- jz 22f
+L21:test dh, 2
+ jz L22
- fld %st // y : y
- fistpll (%esp) // y
- fildll (%esp) // int(y) : y
+ fld st // y : y
+ fistp qword ptr [esp] // y
+ fild qword ptr [esp] // int(y) : y
fucompp // <empty>
- fnstsw
+ fnstsw ax
sahf
- jne 23f
+ jne L23
// OK, the value is an integer, but is the number of bits small
// enough so that all are coming from the mantissa?
- popl %eax
+ pop eax
cfi_adjust_cfa_offset (-4)
- popl %edx
+ pop edx
cfi_adjust_cfa_offset (-4)
- andb $1, %al
- jz 24f // jump if not odd
- cmpl $0xffe00000, %edx
- jae 24f // does not fit in mantissa bits
+ and al, 1
+ jz L24 // jump if not odd
+ cmp edx, HEX(0ffe00000)
+ jae L24 // does not fit in mantissa bits
// It's an odd integer.
- fldl MO(mzero)
+ fld qword ptr MO(mzero)
ret
cfi_adjust_cfa_offset (8)
-22: fstp %st(0)
-23: addl $8, %esp // Don't use 2 x pop
+L22: fstp st(0)
+L23: add esp, 8 // Don't use 2 x pop
cfi_adjust_cfa_offset (-8)
-24: fldl MO(zero)
+L24: fld qword ptr MO(zero)
ret
-END(__ieee754_pow)
+END
projects / reactos.git / blobdiff