mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-23 15:29:51 +00:00
3a9e7690ba
having to do a double cast (uint64_t --> double --> float). This is based on the algorithm from compiler_rt's __floatundisf for X86-64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115634 91177308-0d34-0410-b5e6-96231b3b80d8
22 lines
662 B
LLVM
22 lines
662 B
LLVM
; RUN: llc < %s -march=x86-64 | FileCheck %s
|
|
; Verify that we are using the efficient uitofp --> sitofp lowering illustrated
|
|
; by the compiler_rt implementation of __floatundisf.
|
|
; <rdar://problem/8493982>
|
|
|
|
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
|
|
target triple = "x86_64-apple-darwin10.0.0"
|
|
|
|
; CHECK: testq %rdi, %rdi
|
|
; CHECK-NEXT: jns LBB0_2
|
|
; CHECK: shrq
|
|
; CHECK-NEXT: andq
|
|
; CHECK-NEXT: orq
|
|
; CHECK-NEXT: cvtsi2ss
|
|
; CHECK: LBB0_2
|
|
; CHECK-NEXT: cvtsi2ss
|
|
define float @test(i64 %a) {
|
|
entry:
|
|
%b = uitofp i64 %a to float
|
|
ret float %b
|
|
}
|