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Add more libm unit tests and fixes

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See #61
This commit is contained in:
Justine Tunney 2021-03-02 13:57:23 -08:00
parent 32e289b1d8
commit 9367253b4d
15 changed files with 390 additions and 124 deletions
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45
libc/tinymath/ceil.S
View file

@ -17,28 +17,41 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
// Returns smallest integral not less than 𝑥.
//
// @param 𝑥 is double scalar in low half of %xmm0
// @return double scalar in low half of %xmm0
// @see round(),rint(),nearbyint()
// @see vroundsd $_MM_FROUND_TO_POS_INF|_MM_FROUND_NO_EXC,%xmm0,%xmm0,%xmm0
ceil: .leafprologue
.profilable
movsd nan(%rip),%xmm1
movsd sig(%rip),%xmm2
andpd %xmm0,%xmm1
comisd %xmm1,%xmm2
movsd 4f(%rip),%xmm3
movsd 2f(%rip),%xmm4
movapd %xmm0,%xmm2
movapd %xmm0,%xmm1
andpd %xmm3,%xmm2
ucomisd %xmm2,%xmm4
jbe 1f
cvttsd2siq %xmm0,%rax
pxor %xmm1,%xmm1
movsd one(%rip),%xmm2
cvtsi2sdq %rax,%xmm1
cmpnlesd %xmm1,%xmm0
andpd %xmm2,%xmm0
addsd %xmm1,%xmm0
pxor %xmm2,%xmm2
movsd 3f(%rip),%xmm4
andnpd %xmm1,%xmm3
cvtsi2sdq %rax,%xmm2
cmpnlesd %xmm2,%xmm0
andpd %xmm4,%xmm0
addsd %xmm2,%xmm0
orpd %xmm3,%xmm0
1: .leafepilogue
.endfn ceil,globl
.rodata.cst8
nan: .double nan
sig: .quad 0x0010000000000000
one: .double 1
// vroundsd $_MM_FROUND_TO_POS_INF|_MM_FROUND_NO_EXC,%xmm0,%xmm0,%xmm0
2: .long 0x00000000
.long 0x43300000
3: .long 0x00000000
.long 0x3ff00000
.rodata.cst16
4: .long 0xffffffff
.long 0x7fffffff
.long 0x00000000
.long 0x00000000

49
libc/tinymath/ceilf.S
View file

@ -17,34 +17,39 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
// Returns smallest integral not less than 𝑥.
//
// @param 𝑥 is float scalar in low quarter of %xmm0
// @return float scalar in low quarter of %xmm0
// @see round(),rint(),nearbyint()
// @see vroundss $_MM_FROUND_TO_POS_INF|_MM_FROUND_NO_EXC,%xmm0,%xmm0,%xmm0
ceilf: .leafprologue
.profilable
movss .L3(%rip),%xmm1
andps %xmm0,%xmm1
movss .L2(%rip),%xmm2
comiss %xmm1,%xmm2
movss 4f(%rip),%xmm3
movss 2f(%rip),%xmm4
movaps %xmm0,%xmm2
movaps %xmm0,%xmm1
andps %xmm3,%xmm2
ucomiss %xmm2,%xmm4
jbe 1f
cvttss2si %xmm0,%eax
pxor %xmm1,%xmm1
movss .L1(%rip),%xmm2
cvtsi2ss %eax,%xmm1
cmpnless %xmm1,%xmm0
andps %xmm2,%xmm0
addss %xmm1,%xmm0
cvttss2sil %xmm0,%eax
pxor %xmm2,%xmm2
movss 3f(%rip),%xmm4
andnps %xmm1,%xmm3
cvtsi2ssl %eax,%xmm2
cmpnless %xmm2,%xmm0
andps %xmm4,%xmm0
addss %xmm2,%xmm0
orps %xmm3,%xmm0
1: .leafepilogue
.endfn ceilf,globl
.rodata.cst4
.L1: .float 1.0
.L2: .long 1258291200
2: .long 0x4b000000
3: .long 0x3f800000
.rodata.cst16
.L3: .long 2147483647
.long 0
.long 0
.long 0
// TODO(jart):
// vroundss $10,%xmm0,%xmm0,%xmm0
4: .long 0x7fffffff
.long 0x00000000
.long 0x00000000
.long 0x00000000

29
libc/tinymath/ceill.S
View file

@ -17,19 +17,24 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
ceill: .profilable
sub $24,%rsp
fldt 32(%rsp)
fnstcw 14(%rsp)
movzwl 14(%rsp),%eax
andb $-13,%ah
orb $8,%ah
movw %ax,12(%rsp)
fldcw 12(%rsp)
// Returns smallest integral not less than 𝑥.
//
// @param 𝑥 is long double passed on stack
// @return long double in %st
ceill: pushq %rbp
mov %rsp,%rbp
.profilable
sub $16,%rsp
fnstcw -2(%rbp)
fldt 16(%rbp)
movzwl -2(%rbp),%eax
and $-13,%ah
or $8,%ah
mov %ax,-4(%rbp)
fldcw -4(%rbp)
frndint
fldcw 14(%rsp)
add $24,%rsp
fldcw -2(%rbp)
leave
ret
.endfn ceill,globl

49
libc/tinymath/floor.S
View file

@ -17,31 +17,42 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
// vroundsd $_MM_FROUND_TO_NEG_INF|_MM_FROUND_NO_EXC,%xmm0,%xmm0,%xmm0
// Returns largest integral not greater than 𝑥.
//
// @param 𝑥 is double scalar in low half of %xmm0
// @return double scalar in low half of %xmm0
floor: .leafprologue
.profilable
movsd 4f(%rip),%xmm1
movsd 3f(%rip),%xmm2
andpd %xmm0,%xmm1
comisd %xmm1,%xmm2
movsd 4f(%rip),%xmm3
movsd 2f(%rip),%xmm4
movapd %xmm0,%xmm2
movapd %xmm0,%xmm1
andpd %xmm3,%xmm2
ucomisd %xmm2,%xmm4
jbe 1f
cvttsd2siq %xmm0,%rax
pxor %xmm1,%xmm1
movsd 2f(%rip),%xmm2
cvtsi2sdq %rax,%xmm1
movapd %xmm1,%xmm3
cmpnlesd %xmm0,%xmm3
movapd %xmm3,%xmm0
andpd %xmm2,%xmm0
subsd %xmm0,%xmm1
movapd %xmm1,%xmm0
pxor %xmm2,%xmm2
movsd 3f(%rip),%xmm4
andnpd %xmm1,%xmm3
cvtsi2sdq %rax,%xmm2
movapd %xmm2,%xmm5
cmpnlesd %xmm0,%xmm5
movapd %xmm5,%xmm0
andpd %xmm4,%xmm0
subsd %xmm0,%xmm2
movapd %xmm2,%xmm0
orpd %xmm3,%xmm0
1: .leafepilogue
.endfn floor,globl
.rodata.cst8
2: .double 1
3: .quad 0x0010000000000000
4: .double nan
2: .long 0x00000000
.long 0x43300000
3: .long 0x00000000
.long 0x3ff00000
.rodata.cst16
4: .long 0xffffffff
.long 0x7fffffff
.long 0x00000000
.long 0x00000000

47
libc/tinymath/floorf.S
View file

@ -17,31 +17,40 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
// Returns largest integral not greater than 𝑥.
//
// @param 𝑥 is float scalar in low quarter of %xmm0
// @return float scalar in low quarter of %xmm0
floorf: .leafprologue
.profilable
movss .LC8(%rip),%xmm1
andps %xmm0,%xmm1
movss .LC7(%rip),%xmm2
comiss %xmm1,%xmm2
movss 4f(%rip),%xmm3
movss 2f(%rip),%xmm4
movaps %xmm0,%xmm2
movaps %xmm0,%xmm1
andps %xmm3,%xmm2
ucomiss %xmm2,%xmm4
jbe 1f
cvttss2si %xmm0,%eax
pxor %xmm1,%xmm1
movss .LC3(%rip),%xmm2
cvtsi2ss %eax,%xmm1
movaps %xmm1,%xmm3
cmpnless %xmm0,%xmm3
movaps %xmm3,%xmm0
andps %xmm2,%xmm0
subss %xmm0,%xmm1
movaps %xmm1,%xmm0
cvttss2sil %xmm0,%eax
pxor %xmm2,%xmm2
movss 3f(%rip),%xmm4
andnps %xmm1,%xmm3
cvtsi2ssl %eax,%xmm2
movaps %xmm2,%xmm5
cmpnless %xmm0,%xmm5
movaps %xmm5,%xmm0
andps %xmm4,%xmm0
subss %xmm0,%xmm2
movaps %xmm2,%xmm0
orps %xmm3,%xmm0
1: .leafepilogue
.endfn floorf,globl
.rodata.cst4
.LC3: .float 1.0
.LC7: .long 0x4b000000
2: .long 0x4b000000
3: .long 0x3f800000
.rodata.cst16
.LC8: .long 2147483647,0,0,0
4: .long 0x7fffffff
.long 0x00000000
.long 0x00000000
.long 0x00000000

26
libc/tinymath/floorl.S
View file

@ -17,17 +17,23 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
floorl: .profilable
fldt 8(%rsp)
mov $7,%al
fstcw 8(%rsp)
mov 9(%rsp),%ah
mov %al,9(%rsp)
fldcw 8(%rsp)
// Returns largest integral not greater than 𝑥.
//
// @param 𝑥 is long double passed on stack
// @return float scalar in low quarter of %xmm0
floorl: pushq %rbp
mov %rsp,%rbp
sub $16,%rsp
fnstcw -2(%rbp)
fldt 16(%rbp)
movzwl -2(%rbp),%eax
and $-13,%ah
or $4,%ah
mov %ax,-4(%rbp)
fldcw -4(%rbp)
frndint
mov %ah,9(%rsp)
fldcw 8(%rsp)
fldcw -2(%rbp)
leave
ret
.endfn floorl,globl

11
libc/tinymath/powl.S
View file

@ -16,6 +16,7 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/runtime/pc.internal.h"
#include "libc/macros.internal.h"
// Returns 𝑥^𝑦.
@ -24,12 +25,15 @@
// @param 𝑦 is the power, also pushed on stack, in reverse order
// @return result of exponentiation on FPU stack in %st
// @note Sun's fdlibm needs 2kLOC to do this for RISC lool
// @define exp2l(fmodl(y*log2l(x),1))*exp2l(y)
// @define z=y*log2(fabs(x)),copysign(trunc(exp2(fmod(z,1)))*exp2(z),x)
powl: push %rbp
mov %rsp,%rbp
.profilable
fldt 32(%rbp)
fldt 16(%rbp)
fxam
fstsw
fabs
fyl2x
fld1
fld %st(1)
@ -39,7 +43,10 @@ powl: push %rbp
fscale
fxch
fstp %st
pop %rbp
test $FPU_C1>>8,%ah
jz 1f
fchs
1: pop %rbp
ret
.endfn powl,globl
.alias powl,__powl_finite

22
libc/tinymath/trunc.S
View file

@ -17,7 +17,6 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
// Rounds to integer, toward zero.
//
@ -28,17 +27,26 @@
// @see roundsd $_MM_FROUND_TO_ZERO|_MM_FROUND_NO_EXC,%xmm0,%xmm0
trunc: .leafprologue
.profilable
movsd 3f(%rip),%xmm1
movsd 2f(%rip),%xmm2
andpd %xmm0,%xmm1
comisd %xmm1,%xmm2
movsd 3f(%rip),%xmm2
movsd 2f(%rip),%xmm4
movapd %xmm0,%xmm3
movapd %xmm0,%xmm1
andpd %xmm2,%xmm3
ucomisd %xmm3,%xmm4
jbe 1f
cvttsd2siq %xmm0,%rax
pxor %xmm0,%xmm0
andnpd %xmm1,%xmm2
cvtsi2sdq %rax,%xmm0
orpd %xmm2,%xmm0
1: .leafepilogue
.endfn trunc,globl
.rodata.cst8
2: .quad 0x0010000000000000
3: .double nan
2: .long 0x00000000
.long 0x43300000
.rodata.cst16
3: .long 0xffffffff
.long 0x7fffffff
.long 0x00000000
.long 0x00000000

27
libc/tinymath/truncf.S
View file

@ -17,18 +17,28 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.internal.h"
.source __FILE__
// Rounds to integer, toward zero.
//
// @param 𝑥 is float scalar in low quarter of %xmm0
// @return float scalar in low quarter of %xmm0
// @define trunc(𝑥+copysign(.5,𝑥))
// @see round(),rint(),nearbyint()
// @see roundss $_MM_FROUND_TO_ZERO|_MM_FROUND_NO_EXC,%xmm0,%xmm0
truncf: .leafprologue
.profilable
movss 3f(%rip),%xmm1
andps %xmm0,%xmm1
movss 2f(%rip),%xmm2
comiss %xmm1,%xmm2
movss 3f(%rip),%xmm2
movss 2f(%rip),%xmm4
movaps %xmm0,%xmm3
movaps %xmm0,%xmm1
andps %xmm2,%xmm3
ucomiss %xmm3,%xmm4
jbe 1f
cvttss2si %xmm0,%eax
cvttss2sil %xmm0,%eax
pxor %xmm0,%xmm0
cvtsi2ss %eax,%xmm0
andnps %xmm1,%xmm2
cvtsi2ssl %eax,%xmm0
orps %xmm2,%xmm0
1: .leafepilogue
.endfn truncf,globl
@ -36,6 +46,3 @@ truncf: .leafprologue
2: .long 0x4b000000
.rodata.cst16
3: .long 0x7fffffff,0,0,0
// TODO(jart)
// roundss $_MM_FROUND_TO_ZERO|_MM_FROUND_NO_EXC,%xmm0,%xmm0

55
test/libc/tinymath/ceil_test.c Normal file
View file

@ -0,0 +1,55 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/runtime/gc.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
TEST(ceil, test) {
EXPECT_STREQ("3", gc(xdtoa(ceil(3))));
EXPECT_STREQ("4", gc(xdtoa(ceil(3.14))));
EXPECT_STREQ("-3", gc(xdtoa(ceil(-3.14))));
EXPECT_STREQ("-0", gc(xdtoa(ceil(-0.))));
EXPECT_STREQ("NAN", gc(xdtoa(ceil(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoa(ceil(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoa(ceil(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoa(ceil(-INFINITY))));
}
TEST(ceilf, test) {
EXPECT_STREQ("3", gc(xdtoaf(ceilf(3))));
EXPECT_STREQ("4", gc(xdtoaf(ceilf(3.14))));
EXPECT_STREQ("-3", gc(xdtoaf(ceilf(-3.14))));
EXPECT_STREQ("-0", gc(xdtoaf(ceilf(-0.))));
EXPECT_STREQ("NAN", gc(xdtoaf(ceilf(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoaf(ceilf(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(ceilf(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoaf(ceilf(-INFINITY))));
}
TEST(ceill, test) {
EXPECT_STREQ("3", gc(xdtoal(ceill(3))));
EXPECT_STREQ("4", gc(xdtoal(ceill(3.14))));
EXPECT_STREQ("-3", gc(xdtoal(ceill(-3.14))));
EXPECT_STREQ("-0", gc(xdtoal(ceill(-0.))));
EXPECT_STREQ("NAN", gc(xdtoal(ceill(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoal(ceill(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoal(ceill(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoal(ceill(-INFINITY))));
}

28
test/libc/tinymath/exp2l_test.c Normal file
View file

@ -0,0 +1,28 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/runtime/gc.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
TEST(exp2l, test) {
EXPECT_STREQ("16", gc(xdtoal(exp2l(4))));
EXPECT_STREQ("16", gc(xdtoa(exp2(4))));
EXPECT_STREQ("16", gc(xdtoaf(exp2f(4))));
}

55
test/libc/tinymath/floor_test.c Normal file
View file

@ -0,0 +1,55 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/runtime/gc.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
TEST(floor, test) {
EXPECT_STREQ("3", gc(xdtoa(floor(3))));
EXPECT_STREQ("3", gc(xdtoa(floor(3.14))));
EXPECT_STREQ("-4", gc(xdtoa(floor(-3.14))));
EXPECT_STREQ("-0", gc(xdtoa(floor(-0.))));
EXPECT_STREQ("NAN", gc(xdtoa(floor(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoa(floor(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoa(floor(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoa(floor(-INFINITY))));
}
TEST(floorf, test) {
EXPECT_STREQ("3", gc(xdtoaf(floorf(3))));
EXPECT_STREQ("3", gc(xdtoaf(floorf(3.14))));
EXPECT_STREQ("-4", gc(xdtoaf(floorf(-3.14))));
EXPECT_STREQ("-0", gc(xdtoaf(floorf(-0.))));
EXPECT_STREQ("NAN", gc(xdtoaf(floorf(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoaf(floorf(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(floorf(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoaf(floorf(-INFINITY))));
}
TEST(floorl, test) {
EXPECT_STREQ("3", gc(xdtoal(floorl(3))));
EXPECT_STREQ("3", gc(xdtoal(floorl(3.14))));
EXPECT_STREQ("-4", gc(xdtoal(floorl(-3.14))));
EXPECT_STREQ("-0", gc(xdtoal(floorl(-0.))));
EXPECT_STREQ("NAN", gc(xdtoal(floorl(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoal(floorl(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoal(floorl(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoal(floorl(-INFINITY))));
}

14
test/libc/tinymath/powl_test.c
View file

@ -22,33 +22,35 @@
#include "libc/math.h"
#include "libc/runtime/gc.h"
#include "libc/runtime/pc.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/sa.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
double powa(double x, double y) {
return exp2(fmod(y * log2(x), 1)) * exp2(y);
}
TEST(powl, testLongDouble) {
EXPECT_TRUE(isnan(powl(-1, 1.1)));
EXPECT_STREQ("27", gc(xdtoal(powl(3, 3))));
EXPECT_STREQ("-27", gc(xdtoal(powl(-3, 3))));
EXPECT_STREQ("-1", gc(xdtoal(powl(-1, 1.1))));
EXPECT_STREQ("1e+4932", gc(xdtoal(powl(10, 4932))));
EXPECT_STREQ("INFINITY", gc(xdtoal(powl(10, 4933))));
EXPECT_STREQ("0", gc(xdtoal(powl(10, -5000))));
EXPECT_STREQ("1.063382396627933e+37", gc(xdtoal(powl(2, 123))));
/* .4248496805467504836322459796959084815827285786480897 */
EXPECT_STARTSWITH(".4248496805467504", gc(xdtoal(powl(0.7, 2.4))));
}
TEST(powl, testDouble) {
EXPECT_STREQ("27", gc(xdtoa(pow(3, 3))));
EXPECT_STREQ("-27", gc(xdtoa(pow(-3, 3))));
EXPECT_STREQ("1e+308", gc(xdtoa(pow(10, 308))));
EXPECT_STREQ("INFINITY", gc(xdtoa(pow(10, 309))));
EXPECT_STARTSWITH(".42484968054675", gc(xdtoa(pow(0.7, 2.4))));
}
TEST(powl, testFloat) {
EXPECT_STREQ("27", gc(xdtoaf(powf(3, 3))));
EXPECT_STREQ("-27", gc(xdtoaf(powf(-3, 3))));
EXPECT_STARTSWITH(".4248496", gc(xdtoa(powf(0.7f, 2.4f))));
}

55
test/libc/tinymath/trunc_test.c Normal file
View file

@ -0,0 +1,55 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/runtime/gc.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
TEST(trunc, test) {
EXPECT_STREQ("3", gc(xdtoa(trunc(3))));
EXPECT_STREQ("3", gc(xdtoa(trunc(3.14))));
EXPECT_STREQ("-3", gc(xdtoa(trunc(-3.14))));
EXPECT_STREQ("-0", gc(xdtoa(trunc(-0.))));
EXPECT_STREQ("NAN", gc(xdtoa(trunc(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoa(trunc(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoa(trunc(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoa(trunc(-INFINITY))));
}
TEST(truncf, test) {
EXPECT_STREQ("3", gc(xdtoaf(truncf(3))));
EXPECT_STREQ("3", gc(xdtoaf(truncf(3.14))));
EXPECT_STREQ("-3", gc(xdtoaf(truncf(-3.14))));
EXPECT_STREQ("-0", gc(xdtoaf(truncf(-0.))));
EXPECT_STREQ("NAN", gc(xdtoaf(truncf(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoaf(truncf(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(truncf(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoaf(truncf(-INFINITY))));
}
TEST(truncl, test) {
EXPECT_STREQ("3", gc(xdtoal(truncl(3))));
EXPECT_STREQ("3", gc(xdtoal(truncl(3.14))));
EXPECT_STREQ("-3", gc(xdtoal(truncl(-3.14))));
EXPECT_STREQ("-0", gc(xdtoal(truncl(-0.))));
EXPECT_STREQ("NAN", gc(xdtoal(truncl(NAN))));
EXPECT_STREQ("-NAN", gc(xdtoal(truncl(-NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoal(truncl(INFINITY))));
EXPECT_STREQ("-INFINITY", gc(xdtoal(truncl(-INFINITY))));
}

2
tool/build/lib/fpu.c
View file

@ -171,7 +171,7 @@ static long double fyl2xp1(long double x, long double y) {
}
static long double fscale(long double significand, long double exponent) {
return scalbl(significand, exponent);
return scalbl(trunc(significand), exponent);
}
static long double x87remainder(long double x, long double y, uint32_t *sw,