1 ; RUN: llc < %s | FileCheck %s --check-prefix=CHECK --check-prefix=SAFE 2 ; RUN: llc < %s -enable-unsafe-fp-math | FileCheck %s --check-prefix=CHECK --check-prefix=UNSAFE 3 4 target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" 5 target triple = "x86_64--" 6 7 ; CHECK-LABEL: double_rounding: 8 ; SAFE: callq __trunctfdf2 9 ; SAFE-NEXT: cvtsd2ss %xmm0 10 ; UNSAFE: callq __trunctfsf2 11 ; UNSAFE-NOT: cvt 12 define void @double_rounding(fp128* %x, float* %f) { 13 entry: 14 %0 = load fp128, fp128* %x, align 16 15 %1 = fptrunc fp128 %0 to double 16 %2 = fptrunc double %1 to float 17 store float %2, float* %f, align 4 18 ret void 19 } 20 21 ; CHECK-LABEL: double_rounding_precise_first: 22 ; CHECK: fstps (% 23 ; CHECK-NOT: fstpl 24 define void @double_rounding_precise_first(float* %f) { 25 entry: 26 ; Hack, to generate a precise FP_ROUND to double 27 %precise = call double asm sideeffect "fld %st(0)", "={st(0)}"() 28 %0 = fptrunc double %precise to float 29 store float %0, float* %f, align 4 30 ret void 31 } 32
