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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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49
libc/tinymath/floor.S
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@ -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