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ed469b20bc
Implement the Newton series for square root, its reciprocal and reciprocal natively using the specialized instructions in AArch64 to perform each series iteration. Differential revision: https://reviews.llvm.org/D26518 llvm-svn: 286907
151 lines
3.8 KiB
LLVM
151 lines
3.8 KiB
LLVM
; RUN: llc < %s -mtriple=aarch64-unknown-linux-gnu -mattr=+neon | FileCheck %s
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define float @frecp0(float %x) #0 {
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%div = fdiv fast float 1.0, %x
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ret float %div
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; CHECK-LABEL: frecp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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}
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define float @frecp1(float %x) #1 {
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%div = fdiv fast float 1.0, %x
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ret float %div
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; CHECK-LABEL: frecp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[R:s[0-7]]]
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; CHECK-NEXT: frecps {{s[0-7](, s[0-7])?}}, [[R]]
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}
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define <2 x float> @f2recp0(<2 x float> %x) #0 {
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%div = fdiv fast <2 x float> <float 1.0, float 1.0>, %x
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ret <2 x float> %div
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; CHECK-LABEL: f2recp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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}
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define <2 x float> @f2recp1(<2 x float> %x) #1 {
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%div = fdiv fast <2 x float> <float 1.0, float 1.0>, %x
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ret <2 x float> %div
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; CHECK-LABEL: f2recp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[R:v[0-7]\.2s]]
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; CHECK-NEXT: frecps {{v[0-7]\.2s(, v[0-7].2s)?}}, [[R]]
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}
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define <4 x float> @f4recp0(<4 x float> %x) #0 {
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%div = fdiv fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <4 x float> %div
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; CHECK-LABEL: f4recp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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}
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define <4 x float> @f4recp1(<4 x float> %x) #1 {
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%div = fdiv fast <4 x float> <float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <4 x float> %div
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; CHECK-LABEL: f4recp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[R:v[0-7]\.4s]]
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; CHECK-NEXT: frecps {{v[0-7]\.4s(, v[0-7].4s)?}}, [[R]]
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}
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define <8 x float> @f8recp0(<8 x float> %x) #0 {
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%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <8 x float> %div
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; CHECK-LABEL: f8recp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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; CHECK-NEXT: fdiv
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}
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define <8 x float> @f8recp1(<8 x float> %x) #1 {
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%div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %x
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ret <8 x float> %div
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; CHECK-LABEL: f8recp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[RA:v[0-7]\.4s]]
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; CHECK-NEXT: frecpe [[RB:v[0-7]\.4s]]
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; CHECK-NEXT: frecps {{v[0-7]\.4s(, v[0-7].4s)?}}, [[RA]]
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; CHECK: frecps {{v[0-7]\.4s(, v[0-7].4s)?}}, [[RB]]
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}
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define double @drecp0(double %x) #0 {
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%div = fdiv fast double 1.0, %x
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ret double %div
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; CHECK-LABEL: drecp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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}
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define double @drecp1(double %x) #1 {
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%div = fdiv fast double 1.0, %x
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ret double %div
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; CHECK-LABEL: drecp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[R:d[0-7]]]
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; CHECK-NEXT: frecps {{d[0-7](, d[0-7])?}}, [[R]]
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}
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define <2 x double> @d2recp0(<2 x double> %x) #0 {
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%div = fdiv fast <2 x double> <double 1.0, double 1.0>, %x
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ret <2 x double> %div
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; CHECK-LABEL: d2recp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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}
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define <2 x double> @d2recp1(<2 x double> %x) #1 {
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%div = fdiv fast <2 x double> <double 1.0, double 1.0>, %x
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ret <2 x double> %div
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; CHECK-LABEL: d2recp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[R:v[0-7]\.2d]]
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; CHECK-NEXT: frecps {{v[0-7]\.2d(, v[0-7].2d)?}}, [[R]]
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}
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define <4 x double> @d4recp0(<4 x double> %x) #0 {
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%div = fdiv fast <4 x double> <double 1.0, double 1.0, double 1.0, double 1.0>, %x
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ret <4 x double> %div
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; CHECK-LABEL: d4recp0:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: fmov
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; CHECK-NEXT: fdiv
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; CHECK-NEXT: fdiv
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}
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define <4 x double> @d4recp1(<4 x double> %x) #1 {
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%div = fdiv fast <4 x double> <double 1.0, double 1.0, double 1.0, double 1.0>, %x
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ret <4 x double> %div
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; CHECK-LABEL: d4recp1:
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; CHECK-NEXT: BB#0
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; CHECK-NEXT: frecpe [[RA:v[0-7]\.2d]]
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; CHECK-NEXT: frecpe [[RB:v[0-7]\.2d]]
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; CHECK-NEXT: frecps {{v[0-7]\.2d(, v[0-7].2d)?}}, [[RA]]
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; CHECK: frecps {{v[0-7]\.2d(, v[0-7].2d)?}}, [[RB]]
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}
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attributes #0 = { nounwind "unsafe-fp-math"="true" }
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attributes #1 = { nounwind "unsafe-fp-math"="true" "reciprocal-estimates"="div,vec-div" }
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