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| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
; Test against PR36600: https://bugs.llvm.org/show_bug.cgi?id=36600
; This is not fabs. If X = -0.0, it should return -0.0 not 0.0.
define double @not_fabs(double %x) #0 {
; CHECK-LABEL: not_fabs:
; CHECK: // %bb.0:
; CHECK-NEXT: fneg d1, d0
; CHECK-NEXT: fcmp d0, #0.0
; CHECK-NEXT: fcsel d0, d1, d0, le
; CHECK-NEXT: ret
%cmp = fcmp nnan ole double %x, 0.0
%sub = fsub nnan double -0.0, %x
%cond = select i1 %cmp, double %sub, double %x
ret double %cond
}
; Try again with different type, predicate, and compare constant.
define float @still_not_fabs(float %x) #0 {
; CHECK-LABEL: still_not_fabs:
; CHECK: // %bb.0:
; CHECK-NEXT: mov w8, #-2147483648
; CHECK-NEXT: fmov s2, w8
; CHECK-NEXT: fneg s1, s0
; CHECK-NEXT: fcmp s0, s2
; CHECK-NEXT: fcsel s0, s0, s1, ge
; CHECK-NEXT: ret
%cmp = fcmp nnan oge float %x, -0.0
%sub = fsub nnan float -0.0, %x
%cond = select i1 %cmp, float %x, float %sub
ret float %cond
}
define float @nabsf(float %a) {
; CHECK-LABEL: nabsf:
; CHECK: // %bb.0:
; CHECK-NEXT: fabs s0, s0
; CHECK-NEXT: fneg s0, s0
; CHECK-NEXT: ret
%conv = bitcast float %a to i32
%and = or i32 %conv, -2147483648
%conv1 = bitcast i32 %and to float
ret float %conv1
}
define double @nabsd(double %a) {
; CHECK-LABEL: nabsd:
; CHECK: // %bb.0:
; CHECK-NEXT: fabs d0, d0
; CHECK-NEXT: fneg d0, d0
; CHECK-NEXT: ret
%conv = bitcast double %a to i64
%and = or i64 %conv, -9223372036854775808
%conv1 = bitcast i64 %and to double
ret double %conv1
}
define <4 x float> @nabsv4f32(<4 x float> %a) {
; CHECK-LABEL: nabsv4f32:
; CHECK: // %bb.0:
; CHECK-NEXT: orr v0.4s, #128, lsl #24
; CHECK-NEXT: ret
%conv = bitcast <4 x float> %a to <4 x i32>
%and = or <4 x i32> %conv, <i32 -2147483648, i32 -2147483648, i32 -2147483648, i32 -2147483648>
%conv1 = bitcast <4 x i32> %and to <4 x float>
ret <4 x float> %conv1
}
define <2 x double> @nabsv2d64(<2 x double> %a) {
; CHECK-LABEL: nabsv2d64:
; CHECK: // %bb.0:
; CHECK-NEXT: mov x8, #-9223372036854775808
; CHECK-NEXT: dup v1.2d, x8
; CHECK-NEXT: orr v0.16b, v0.16b, v1.16b
; CHECK-NEXT: ret
%conv = bitcast <2 x double> %a to <2 x i64>
%and = or <2 x i64> %conv, <i64 -9223372036854775808, i64 -9223372036854775808>
%conv1 = bitcast <2 x i64> %and to <2 x double>
ret <2 x double> %conv1
}
attributes #0 = { "no-nans-fp-math"="true" }
|