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Use mixed Horner scheme in Math.exp/expm1 to improve instruction parallelization (#311)

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This commit is contained in:
Max Graey
2018-11-09 18:56:42 +02:00
committed by Daniel Wirtz
parent 54311fd0ab
commit 410036e445
8 changed files with 7763 additions and 6904 deletions
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83
tests/compiler/std/libm.optimized.wat
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@ -1695,7 +1695,6 @@
return
end
end
f64.const 1
get_local $0
f64.const 0.5
get_local $0
@ -1703,12 +1702,22 @@
tee_local $8
f64.mul
tee_local $2
f64.const -0.03333333333333313
get_local $2
f64.mul
set_local $1
f64.const 3
f64.const 1
get_local $2
f64.const -0.03333333333333313
f64.mul
f64.add
get_local $1
f64.const 1.5873015872548146e-03
get_local $2
f64.const -7.93650757867488e-05
get_local $2
f64.mul
f64.add
get_local $1
f64.const 4.008217827329362e-06
get_local $2
f64.const -2.0109921818362437e-07
@ -1718,20 +1727,14 @@
f64.add
f64.mul
f64.add
f64.mul
f64.add
f64.mul
f64.add
tee_local $9
set_local $1
get_local $2
get_local $9
f64.const 3
get_local $1
get_local $8
f64.mul
f64.sub
tee_local $1
set_local $1
get_local $2
get_local $9
get_local $1
f64.sub
f64.const 6
get_local $0
@ -1954,10 +1957,12 @@
)
(func $~lib/math/NativeMath.exp (; 25 ;) (type $FF) (param $0 f64) (result f64)
(local $1 i32)
(local $2 i32)
(local $3 f64)
(local $4 i32)
(local $2 f64)
(local $3 i32)
(local $4 f64)
(local $5 f64)
(local $6 i32)
(local $7 f64)
get_local $0
i64.reinterpret/f64
i64.const 32
@ -1966,7 +1971,7 @@
tee_local $1
i32.const 31
i32.shr_u
set_local $4
set_local $6
get_local $1
i32.const 2147483647
i32.and
@ -2017,22 +2022,22 @@
i32.trunc_s/f64
else
i32.const 1
get_local $4
get_local $6
i32.const 1
i32.shl
i32.sub
end
tee_local $2
tee_local $3
f64.convert_s/i32
tee_local $0
f64.const 0.6931471803691238
f64.mul
f64.sub
tee_local $3
tee_local $4
get_local $0
f64.const 1.9082149292705877e-10
f64.mul
tee_local $5
tee_local $7
f64.sub
set_local $0
else
@ -2046,23 +2051,30 @@
return
end
get_local $0
set_local $3
set_local $4
end
f64.const 1
get_local $0
get_local $0
get_local $0
get_local $0
f64.mul
tee_local $0
tee_local $2
get_local $2
f64.mul
set_local $5
f64.const 1
get_local $0
get_local $0
get_local $2
f64.const 0.16666666666666602
get_local $0
f64.mul
get_local $5
f64.const -2.7777777777015593e-03
get_local $0
get_local $2
f64.const 6.613756321437934e-05
get_local $0
f64.mul
f64.add
get_local $5
f64.const -1.6533902205465252e-06
get_local $0
get_local $2
f64.const 4.1381367970572385e-08
f64.mul
f64.add
@ -2070,9 +2082,6 @@
f64.add
f64.mul
f64.add
f64.mul
f64.add
f64.mul
f64.sub
tee_local $0
f64.mul
@ -2080,20 +2089,20 @@
get_local $0
f64.sub
f64.div
get_local $5
get_local $7
f64.sub
get_local $3
get_local $4
f64.add
f64.add
set_local $0
get_local $2
get_local $3
i32.eqz
if
get_local $0
return
end
get_local $0
get_local $2
get_local $3
call $~lib/math/NativeMath.scalbn
)
(func $~lib/math/NativeMath.cosh (; 26 ;) (type $FF) (param $0 f64) (result f64)