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eb1a6c5669
The C standard has historically not specified whether or not these functions should raise the inexact flag. Traditionally on Darwin, these functions *did* raise inexact, and the llvm lowerings followed that conventions. n1778 (C bindings for IEEE-754 (2008)) clarifies that these functions should not set inexact. This patch brings the lowerings for arm64 and x86 in line with the newly specified behavior. This also lets us fold some logic into TD patterns, which is nice. Differential Revision: http://reviews.llvm.org/D12969 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248266 91177308-0d34-0410-b5e6-96231b3b80d8
14 lines
471 B
LLVM
14 lines
471 B
LLVM
; RUN: llc < %s -march=x86-64 -mattr=+sse4.1,-avx | FileCheck %s --check-prefix=CHECK-HARD-FLOAT
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; RUN: llc < %s -march=x86-64 -mattr=+sse4.1,-avx,+soft-float | FileCheck %s --check-prefix=CHECK-SOFT-FLOAT
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target triple = "x86_64-unknown-linux-gnu"
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declare float @llvm.floor.f32(float)
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; CHECK-SOFT-FLOAT: callq floorf
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; CHECK-HARD-FLOAT: roundss $9, %xmm0, %xmm0
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define float @myfloor(float %a) {
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%val = tail call float @llvm.floor.f32(float %a)
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ret float %val
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}
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