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Diffstat (limited to 'src/recompiler/Sun/e_powl-x86.S')
| -rw-r--r-- | src/recompiler/Sun/e_powl-x86.S | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/src/recompiler/Sun/e_powl-x86.S b/src/recompiler/Sun/e_powl-x86.S new file mode 100644 index 00000000..cbc99256 --- /dev/null +++ b/src/recompiler/Sun/e_powl-x86.S @@ -0,0 +1,413 @@ +/* ix87 specific implementation of pow function. + Copyright (C) 1996, 1997, 1998, 1999, 2001, 2004, 2005 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* + * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice + * other than GPL or LGPL is available it will apply instead, Oracle elects to use only + * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where + * a choice of LGPL license versions is made available with the language indicating + * that LGPLv2 or any later version may be used, or where a choice of which version + * of the LGPL is applied is otherwise unspecified. + */ + +/*#include <machine/asm.h>*/ +#include <iprt/cdefs.h> + +#ifdef __MINGW32__ +# define ASM_TYPE_DIRECTIVE(name,typearg) +# define ASM_SIZE_DIRECTIVE(name) +# define cfi_adjust_cfa_offset(a) +# define C_LABEL(name) _ ## name: +# define C_SYMBOL_NAME(name) _ ## name +# define ASM_GLOBAL_DIRECTIVE .global +# define ALIGNARG(log2) 1<<log2 +#elif __APPLE__ +# define ASM_TYPE_DIRECTIVE(name,typearg) +# define ASM_SIZE_DIRECTIVE(name) +# define cfi_adjust_cfa_offset(a) +# define C_LABEL(name) _ ## name: +# define C_SYMBOL_NAME(name) _ ## name +# define ASM_GLOBAL_DIRECTIVE .globl +# define ALIGNARG(log2) log2 +#else +# define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg; +# define ASM_SIZE_DIRECTIVE(name) .size name,.-name; +# define C_LABEL(name) name: +# define C_SYMBOL_NAME(name) name +# /* figure this one out. */ +# define cfi_adjust_cfa_offset(a) +# define ASM_GLOBAL_DIRECTIVE .global +# define ALIGNARG(log2) 1<<log2 +#endif + +#define ENTRY(name) \ + ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ + .align ALIGNARG(4); \ + C_LABEL(name) + +#undef END +#define END(name) \ + ASM_SIZE_DIRECTIVE(name) + +#ifdef __ELF__ + .section .rodata +#else + .text +#endif + + .align ALIGNARG(4) + ASM_TYPE_DIRECTIVE(infinity,@object) +inf_zero: +infinity: + .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f + ASM_SIZE_DIRECTIVE(infinity) + ASM_TYPE_DIRECTIVE(zero,@object) +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 +mzero: + .byte 0, 0, 0, 0, 0, 0, 0, 0x80 + ASM_SIZE_DIRECTIVE(minf_mzero) + ASM_TYPE_DIRECTIVE(one,@object) +one: .double 1.0 + ASM_SIZE_DIRECTIVE(one) + ASM_TYPE_DIRECTIVE(limit,@object) +limit: .double 0.29 + ASM_SIZE_DIRECTIVE(limit) + ASM_TYPE_DIRECTIVE(p63,@object) +p63: .byte 0, 0, 0, 0, 0, 0, 0xe0, 0x43 + ASM_SIZE_DIRECTIVE(p63) + +#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_powl) +ENTRY(RT_NOCRT(powl)) +#ifdef RT_OS_DARWIN /* 16-byte long double with 8 byte alignment requirements */ + fldt 20(%esp) // y +#else + fldt 16(%esp) // y +#endif + fxam + +#ifdef PIC + LOAD_PIC_REG (cx) +#endif + + fnstsw + movb %ah, %dl + andb $0x45, %ah + cmpb $0x40, %ah // is y == 0 ? + je .L11 + + cmpb $0x05, %ah // is y == ±inf ? + je .L12 + + cmpb $0x01, %ah // is y == NaN ? + je .L30 + + fldt 4(%esp) // x : y + + subl $8,%esp + cfi_adjust_cfa_offset (8) + + fxam + fnstsw + movb %ah, %dh + andb $0x45, %ah + cmpb $0x40, %ah + je .L20 // x is ±0 + + cmpb $0x05, %ah + je .L15 // x is ±inf + + fxch // y : x + + /* fistpll raises invalid exception for |y| >= 1L<<63. */ + fld %st // y : y : x + fabs // |y| : y : x + fcompl MO(p63) // y : x + fnstsw + sahf + 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 + sahf + jne .L2 + + /* OK, we have an integer value for y. */ + popl %eax + cfi_adjust_cfa_offset (-4) + popl %edx + cfi_adjust_cfa_offset (-4) + orl $0, %edx + fstp %st(0) // x + jns .L4 // y >= 0, jump + fdivrl MO(one) // 1/x (now referred to as x) + negl %eax + adcl $0, %edx + negl %edx +.L4: fldl MO(one) // 1 : x + fxch + +.L6: shrdl $1, %edx, %eax + jnc .L5 + fxch + fmul %st(1) // x : ST*x + fxch +.L5: fmul %st(0), %st // x*x : ST*x + shrl $1, %edx + movl %eax, %ecx + orl %edx, %ecx + jnz .L6 + fstp %st(0) // ST*x + ret + + /* y is ±NAN */ +.L30: fldt 4(%esp) // x : y + fldl MO(one) // 1.0 : x : y + fucomp %st(1) // x : y + fnstsw + sahf + je .L31 + fxch // y : x +.L31: fstp %st(1) + ret + + cfi_adjust_cfa_offset (8) + .align ALIGNARG(4) +.L2: /* y is a real number. */ + fxch // x : y + fldl MO(one) // 1.0 : x : y + fld %st(1) // x : 1.0 : x : y + fsub %st(1) // x-1 : 1.0 : x : y + fabs // |x-1| : 1.0 : x : y + fcompl MO(limit) // 1.0 : x : y + fnstsw + fxch // x : 1.0 : y + sahf + ja .L7 + fsub %st(1) // x-1 : 1.0 : y + fyl2xp1 // log2(x) : y + jmp .L8 + +.L7: fyl2x // log2(x) : y +.L8: fmul %st(1) // y*log2(x) : y + fxam + fnstsw + andb $0x45, %ah + cmpb $0x05, %ah // is y*log2(x) == ±inf ? + je .L28 + 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)) + 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)) + fscale // 2^fract(y*log2(x))*2^int(y*log2(x)) : int(y*log2(x)) + addl $8, %esp + cfi_adjust_cfa_offset (-8) + fstp %st(1) // 2^fract(y*log2(x))*2^int(y*log2(x)) + ret + + cfi_adjust_cfa_offset (8) +.L28: fstp %st(1) // y*log2(x) + fldl MO(one) // 1 : y*log2(x) + fscale // 2^(y*log2(x)) : y*log2(x) + addl $8, %esp + cfi_adjust_cfa_offset (-8) + fstp %st(1) // 2^(y*log2(x)) + ret + + // pow(x,±0) = 1 + .align ALIGNARG(4) +.L11: fstp %st(0) // pop y + fldl MO(one) + ret + + // y == ±inf + .align ALIGNARG(4) +.L12: fstp %st(0) // pop y + fldt 4(%esp) // x + fabs + fcompl MO(one) // < 1, == 1, or > 1 + fnstsw + andb $0x45, %ah + cmpb $0x45, %ah + je .L13 // jump if x is NaN + + cmpb $0x40, %ah + je .L14 // jump if |x| == 1 + + shlb $1, %ah + xorb %ah, %dl + andl $2, %edx + fldl MOX(inf_zero, %edx, 4) + ret + + .align ALIGNARG(4) +.L14: fldl MO(one) + ret + + .align ALIGNARG(4) +.L13: fldt 4(%esp) // load x == NaN + ret + + cfi_adjust_cfa_offset (8) + .align ALIGNARG(4) + // x is ±inf +.L15: fstp %st(0) // y + testb $2, %dh + 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 + fucompp // <empty> + fnstsw + sahf + jne .L17 + + // OK, the value is an integer, but is it odd? + popl %eax + cfi_adjust_cfa_offset (-4) + popl %edx + cfi_adjust_cfa_offset (-4) + andb $1, %al + jz .L18 // jump if not odd + // It's an odd integer. + shrl $31, %edx + fldl MOX(minf_mzero, %edx, 8) + ret + + cfi_adjust_cfa_offset (8) + .align ALIGNARG(4) +.L16: fcompl MO(zero) + addl $8, %esp + cfi_adjust_cfa_offset (-8) + fnstsw + shrl $5, %eax + andl $8, %eax + fldl MOX(inf_zero, %eax, 1) + ret + + cfi_adjust_cfa_offset (8) + .align ALIGNARG(4) +.L17: shll $30, %edx // sign bit for y in right position + addl $8, %esp + cfi_adjust_cfa_offset (-8) +.L18: 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 + testb $2, %dl + 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 .L25 + + fld %st // y : y + fistpll (%esp) // y + fildll (%esp) // int(y) : y + fucompp // <empty> + fnstsw + sahf + jne .L26 + + // OK, the value is an integer, but is it odd? + popl %eax + cfi_adjust_cfa_offset (-4) + popl %edx + cfi_adjust_cfa_offset (-4) + andb $1, %al + jz .L27 // jump if not odd + // It's an odd integer. + // Raise divide-by-zero exception and get minus infinity value. + fldl MO(one) + fdivl MO(zero) + fchs + ret + + cfi_adjust_cfa_offset (8) +.L25: fstp %st(0) +.L26: addl $8, %esp + cfi_adjust_cfa_offset (-8) +.L27: // 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: testb $2, %dh + jz .L22 + + fld %st // y : y + fistpll (%esp) // y + fildll (%esp) // int(y) : y + fucompp // <empty> + fnstsw + sahf + jne .L23 + + // OK, the value is an integer, but is it odd? + popl %eax + cfi_adjust_cfa_offset (-4) + popl %edx + cfi_adjust_cfa_offset (-4) + andb $1, %al + jz .L24 // jump if not odd + // It's an odd integer. + fldl MO(mzero) + ret + + cfi_adjust_cfa_offset (8) +.L22: fstp %st(0) +.L23: addl $8, %esp // Don't use 2 x pop + cfi_adjust_cfa_offset (-8) +.L24: fldl MO(zero) + ret + +END(RT_NOCRT(powl)) +//END(__ieee754_powl) |