1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s -check-prefix=X64
; RUN: llc < %s -mtriple=i686-unknown | FileCheck %s -check-prefix=X86
declare float @llvm.sqrt.f32(float %x);
define float @fast_recip_sqrt(float %x) {
; X64-LABEL: fast_recip_sqrt:
; X64: # BB#0:
; X64-NEXT: sqrtss %xmm0, %xmm1
; X64-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X64-NEXT: divss %xmm1, %xmm0
; X64-NEXT: retq
;
; X86-LABEL: fast_recip_sqrt:
; X86: # BB#0:
; X86-NEXT: flds {{[0-9]+}}(%esp)
; X86-NEXT: fsqrt
; X86-NEXT: fld1
; X86-NEXT: fdivp %st(1)
; X86-NEXT: retl
%y = call fast float @llvm.sqrt.f32(float %x)
%z = fdiv fast float 1.0, %y
ret float %z
}
declare float @llvm.fmuladd.f32(float %a, float %b, float %c);
define float @fast_fmuladd_opts(float %a , float %b , float %c) {
; X64-LABEL: fast_fmuladd_opts:
; X64: # BB#0:
; X64-NEXT: movaps %xmm0, %xmm1
; X64-NEXT: addss %xmm1, %xmm1
; X64-NEXT: addss %xmm0, %xmm1
; X64-NEXT: movaps %xmm1, %xmm0
; X64-NEXT: retq
;
; X86-LABEL: fast_fmuladd_opts:
; X86: # BB#0:
; X86-NEXT: flds {{[0-9]+}}(%esp)
; X86-NEXT: fld %st(0)
; X86-NEXT: fadd %st(1)
; X86-NEXT: faddp %st(1)
; X86-NEXT: retl
%res = call fast float @llvm.fmuladd.f32(float %a, float 2.0, float %a)
ret float %res
}
|
