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