mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 14:00:30 +00:00
alpha: Use builtin sqrt{f}
The generic implementation is simplified by removing the 'optimization' for !_IEEE_FP_INEXACT (which does not handle inexact neither some values). Checked on alpha-linux-gnu.
This commit is contained in:
Adhemerval Zanella
parent
b24381e50f
commit
8a7923b57e
@ -1,53 +0,0 @@
|
||||
/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
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, see
|
||||
<https://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <shlib-compat.h>
|
||||
|
||||
.arch ev6
|
||||
.set noreorder
|
||||
.set noat
|
||||
|
||||
ENTRY(__ieee754_sqrt)
|
||||
#ifdef PROF
|
||||
ldgp gp, 0(pv)
|
||||
lda AT, _mcount
|
||||
jsr AT, (AT), _mcount
|
||||
.prologue 1
|
||||
#else
|
||||
.prologue 0
|
||||
#endif
|
||||
|
||||
.align 4
|
||||
#ifdef _IEEE_FP_INEXACT
|
||||
sqrtt/suid $f16, $f0
|
||||
#else
|
||||
sqrtt/sud $f16, $f0
|
||||
#endif
|
||||
ret
|
||||
nop
|
||||
nop
|
||||
|
||||
END(__ieee754_sqrt)
|
||||
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
|
||||
strong_alias(__ieee754_sqrt, __sqrt_dummy)
|
||||
compat_symbol(libm, __sqrt_dummy, __sqrt_finite, GLIBC_2_15)
|
||||
#endif
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_18, GLIBC_2_31)
|
||||
compat_symbol(libm, __ieee754_sqrt, __sqrt_finite, GLIBC_2_18)
|
||||
#endif
|
||||
@ -1,53 +0,0 @@
|
||||
/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
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, see
|
||||
<https://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <shlib-compat.h>
|
||||
|
||||
.arch ev6
|
||||
.set noreorder
|
||||
.set noat
|
||||
|
||||
ENTRY(__ieee754_sqrtf)
|
||||
#ifdef PROF
|
||||
ldgp gp, 0(pv)
|
||||
lda AT, _mcount
|
||||
jsr AT, (AT), _mcount
|
||||
.prologue 1
|
||||
#else
|
||||
.prologue 0
|
||||
#endif
|
||||
|
||||
.align 4
|
||||
#ifdef _IEEE_FP_INEXACT
|
||||
sqrts/suid $f16, $f0
|
||||
#else
|
||||
sqrts/sud $f16, $f0
|
||||
#endif
|
||||
ret
|
||||
nop
|
||||
nop
|
||||
|
||||
END(__ieee754_sqrtf)
|
||||
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
|
||||
strong_alias(__ieee754_sqrtf, __sqrtf_dummy)
|
||||
compat_symbol(libm, __sqrtf_dummy, __sqrtf_finite, GLIBC_2_15)
|
||||
#endif
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_18, GLIBC_2_31)
|
||||
compat_symbol(libm, __ieee754_sqrtf, __sqrtf_finite, GLIBC_2_18)
|
||||
#endif
|
||||
@ -16,171 +16,11 @@
|
||||
License along with the GNU C Library. If not, see
|
||||
<https://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <math.h>
|
||||
#include <math_private.h>
|
||||
#include <shlib-compat.h>
|
||||
|
||||
#if !defined(_IEEE_FP_INEXACT)
|
||||
|
||||
/*
|
||||
* This version is much faster than generic sqrt implementation, but
|
||||
* it doesn't handle the inexact flag. It doesn't handle exceptional
|
||||
* values either, but will defer to the full ieee754_sqrt routine which
|
||||
* can.
|
||||
*/
|
||||
|
||||
/* Careful with rearranging this without consulting the assembly below. */
|
||||
const static struct sqrt_data_struct {
|
||||
unsigned long dn, up, half, almost_three_half;
|
||||
unsigned long one_and_a_half, two_to_minus_30, one, nan;
|
||||
const int T2[64];
|
||||
} sqrt_data __attribute__((used)) = {
|
||||
0x3fefffffffffffff, /* __dn = nextafter(1,-Inf) */
|
||||
0x3ff0000000000001, /* __up = nextafter(1,+Inf) */
|
||||
0x3fe0000000000000, /* half */
|
||||
0x3ff7ffffffc00000, /* almost_three_half = 1.5-2^-30 */
|
||||
0x3ff8000000000000, /* one_and_a_half */
|
||||
0x3e10000000000000, /* two_to_minus_30 */
|
||||
0x3ff0000000000000, /* one */
|
||||
0xffffffffffffffff, /* nan */
|
||||
|
||||
{ 0x1500, 0x2ef8, 0x4d67, 0x6b02, 0x87be, 0xa395, 0xbe7a, 0xd866,
|
||||
0xf14a, 0x1091b,0x11fcd,0x13552,0x14999,0x15c98,0x16e34,0x17e5f,
|
||||
0x18d03,0x19a01,0x1a545,0x1ae8a,0x1b5c4,0x1bb01,0x1bfde,0x1c28d,
|
||||
0x1c2de,0x1c0db,0x1ba73,0x1b11c,0x1a4b5,0x1953d,0x18266,0x16be0,
|
||||
0x1683e,0x179d8,0x18a4d,0x19992,0x1a789,0x1b445,0x1bf61,0x1c989,
|
||||
0x1d16d,0x1d77b,0x1dddf,0x1e2ad,0x1e5bf,0x1e6e8,0x1e654,0x1e3cd,
|
||||
0x1df2a,0x1d635,0x1cb16,0x1be2c,0x1ae4e,0x19bde,0x1868e,0x16e2e,
|
||||
0x1527f,0x1334a,0x11051,0xe951, 0xbe01, 0x8e0d, 0x5924, 0x1edd }
|
||||
};
|
||||
|
||||
asm ("\
|
||||
/* Define offsets into the structure defined in C above. */ \n\
|
||||
$DN = 0*8 \n\
|
||||
$UP = 1*8 \n\
|
||||
$HALF = 2*8 \n\
|
||||
$ALMOST_THREE_HALF = 3*8 \n\
|
||||
$NAN = 7*8 \n\
|
||||
$T2 = 8*8 \n\
|
||||
\n\
|
||||
/* Stack variables. */ \n\
|
||||
$K = 0 \n\
|
||||
$Y = 8 \n\
|
||||
\n\
|
||||
.text \n\
|
||||
.align 5 \n\
|
||||
.globl __ieee754_sqrt \n\
|
||||
.ent __ieee754_sqrt \n\
|
||||
__ieee754_sqrt: \n\
|
||||
ldgp $29, 0($27) \n\
|
||||
subq $sp, 16, $sp \n\
|
||||
.frame $sp, 16, $26, 0\n"
|
||||
#ifdef PROF
|
||||
" lda $28, _mcount \n\
|
||||
jsr $28, ($28), _mcount\n"
|
||||
#endif
|
||||
" .prologue 1 \n\
|
||||
\n\
|
||||
.align 4 \n\
|
||||
stt $f16, $K($sp) # e0 : \n\
|
||||
mult $f31, $f31, $f31 # .. fm : \n\
|
||||
lda $4, sqrt_data # e0 : \n\
|
||||
fblt $f16, $fixup # .. fa : \n\
|
||||
\n\
|
||||
ldah $2, 0x5fe8 # e0 : \n\
|
||||
ldq $3, $K($sp) # .. e1 : \n\
|
||||
ldt $f12, $HALF($4) # e0 : \n\
|
||||
ldt $f18, $ALMOST_THREE_HALF($4) # .. e1 : \n\
|
||||
\n\
|
||||
sll $3, 52, $5 # e0 : \n\
|
||||
lda $6, 0x7fd # .. e1 : \n\
|
||||
fnop # .. fa : \n\
|
||||
fnop # .. fm : \n\
|
||||
\n\
|
||||
subq $5, 1, $5 # e1 : \n\
|
||||
srl $3, 33, $1 # .. e0 : \n\
|
||||
cmpule $5, $6, $5 # e0 : \n\
|
||||
beq $5, $fixup # .. e1 : \n\
|
||||
\n\
|
||||
mult $f16, $f12, $f11 # fm : $f11 = x * 0.5 \n\
|
||||
subl $2, $1, $2 # .. e0 : \n\
|
||||
addt $f12, $f12, $f17 # .. fa : $f17 = 1.0 \n\
|
||||
srl $2, 12, $1 # e0 : \n\
|
||||
\n\
|
||||
and $1, 0xfc, $1 # e0 : \n\
|
||||
addq $1, $4, $1 # e1 : \n\
|
||||
ldl $1, $T2($1) # e0 : \n\
|
||||
addt $f12, $f17, $f15 # .. fa : $f15 = 1.5 \n\
|
||||
\n\
|
||||
subl $2, $1, $2 # e0 : \n\
|
||||
ldt $f14, $DN($4) # .. e1 : \n\
|
||||
sll $2, 32, $2 # e0 : \n\
|
||||
stq $2, $Y($sp) # e0 : \n\
|
||||
\n\
|
||||
ldt $f13, $Y($sp) # e0 : \n\
|
||||
mult/su $f11, $f13, $f10 # fm 2: $f10 = (x * 0.5) * y \n\
|
||||
mult $f10, $f13, $f10 # fm 4: $f10 = ((x*0.5)*y)*y \n\
|
||||
subt $f15, $f10, $f1 # fa 4: $f1 = (1.5-0.5*x*y*y) \n\
|
||||
\n\
|
||||
mult $f13, $f1, $f13 # fm 4: yp = y*(1.5-0.5*x*y^2)\n\
|
||||
mult/su $f11, $f13, $f1 # fm 4: $f11 = x * 0.5 * yp \n\
|
||||
mult $f1, $f13, $f11 # fm 4: $f11 = (x*0.5*yp)*yp \n\
|
||||
subt $f18, $f11, $f1 # fa 4: $f1=(1.5-2^-30)-x/2*yp^2\n\
|
||||
\n\
|
||||
mult $f13, $f1, $f13 # fm 4: ypp = $f13 = yp*$f1 \n\
|
||||
subt $f15, $f12, $f1 # .. fa : $f1 = (1.5 - 0.5) \n\
|
||||
ldt $f15, $UP($4) # .. e0 : \n\
|
||||
mult/su $f16, $f13, $f10 # fm 4: z = $f10 = x * ypp \n\
|
||||
\n\
|
||||
mult $f10, $f13, $f11 # fm 4: $f11 = z*ypp \n\
|
||||
mult $f10, $f12, $f12 # fm : $f12 = z*0.5 \n\
|
||||
subt $f1, $f11, $f1 # fa 4: $f1 = 1 - z*ypp \n\
|
||||
mult $f12, $f1, $f12 # fm 4: $f12 = z/2*(1 - z*ypp)\n\
|
||||
\n\
|
||||
addt $f10, $f12, $f0 # fa 4: zp=res= z+z/2*(1-z*ypp)\n\
|
||||
mult/c $f0, $f14, $f12 # fm 4: zmi = zp * DN \n\
|
||||
mult/c $f0, $f15, $f11 # fm : zpl = zp * UP \n\
|
||||
mult/c $f0, $f12, $f1 # fm : $f1 = zp * zmi \n\
|
||||
\n\
|
||||
mult/c $f0, $f11, $f15 # fm : $f15 = zp * zpl \n\
|
||||
subt/su $f1, $f16, $f13 # .. fa : y1 = zp*zmi - x \n\
|
||||
subt/su $f15, $f16, $f14 # fa 4: y2 = zp*zpl - x \n\
|
||||
fcmovge $f13, $f12, $f0 # fa 3: res = (y1>=0)?zmi:res \n\
|
||||
\n\
|
||||
fcmovlt $f14, $f11, $f0 # fa 4: res = (y2<0)?zpl:res \n\
|
||||
addq $sp, 16, $sp # .. e0 : \n\
|
||||
ret # .. e1 : \n\
|
||||
\n\
|
||||
.align 4 \n\
|
||||
$fixup: \n\
|
||||
addq $sp, 16, $sp \n\
|
||||
br __full_ieee754_sqrt !samegp \n\
|
||||
\n\
|
||||
.end __ieee754_sqrt");
|
||||
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
|
||||
asm (".global __sqrt_dummy; __sqrt_dummy = __ieee754_sqrt");
|
||||
#else
|
||||
asm (".global __sqrt_finite; __sqrt_finite = __ieee754_sqrt");
|
||||
#endif
|
||||
|
||||
static double __full_ieee754_sqrt(double) __attribute_used__;
|
||||
#define __ieee754_sqrt __full_ieee754_sqrt
|
||||
|
||||
#elif SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
|
||||
|
||||
strong_alias (__ieee754_sqrt, __sqrt_dummy)
|
||||
#define __ieee754_sqrt __ieee754_sqrt
|
||||
|
||||
#endif /* _IEEE_FP_INEXACT */
|
||||
|
||||
#include <sysdeps/ieee754/dbl-64/e_sqrt.c>
|
||||
#undef __ieee754_sqrt
|
||||
|
||||
/* Work around forgotten symbol in alphaev6 build. */
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
|
||||
compat_symbol (libm, __sqrt_dummy, __sqrt_finite, GLIBC_2_15);
|
||||
#endif
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_18, GLIBC_2_31)
|
||||
compat_symbol (libm, __ieee754_sqrt, __sqrt_finite, GLIBC_2_18);
|
||||
strong_alias (__ieee754_sqrt, __sqrt_finite_2_18)
|
||||
compat_symbol (libm, __sqrt_finite_2_18, __sqrt_finite, GLIBC_2_18);
|
||||
#endif
|
||||
|
||||
@ -1,13 +1,8 @@
|
||||
#include <shlib-compat.h>
|
||||
|
||||
#define __ieee754_sqrtf __ieee754_sqrtf
|
||||
#include <sysdeps/ieee754/flt-32/e_sqrtf.c>
|
||||
|
||||
/* Work around forgotten symbol in alphaev6 build. */
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_18)
|
||||
strong_alias(__ieee754_sqrtf, __sqrtf_dummy)
|
||||
compat_symbol (libm, __sqrtf_dummy, __sqrtf_finite, GLIBC_2_15);
|
||||
#endif
|
||||
#if SHLIB_COMPAT (libm, GLIBC_2_18, GLIBC_2_31)
|
||||
compat_symbol (libm, __ieee754_sqrtf, __sqrtf_finite, GLIBC_2_18);
|
||||
strong_alias (__ieee754_sqrtf, __sqrtf_finite_2_18)
|
||||
compat_symbol (libm, __sqrtf_finite_2_18, __sqrtf_finite, GLIBC_2_18);
|
||||
#endif
|
||||
|
||||
9
sysdeps/alpha/fpu/math-use-builtins-sqrt.h
Normal file
9
sysdeps/alpha/fpu/math-use-builtins-sqrt.h
Normal file
@ -0,0 +1,9 @@
|
||||
#ifdef __alpha_ev6__
|
||||
# define USE_SQRT_BUILTIN 1
|
||||
# define USE_SQRTF_BUILTIN 1
|
||||
#else
|
||||
# define USE_SQRT_BUILTIN 0
|
||||
# define USE_SQRTF_BUILTIN 0
|
||||
#endif
|
||||
#define USE_SQRTL_BUILTIN 0
|
||||
#define USE_SQRTF128_BUILTIN 0
|
||||
Loading…
Reference in New Issue
Block a user