llvm-6502/test/CodeGen/SystemZ/fp-cmp-03.ll
Richard Sandiford e0bbf7288c [SystemZ] Add floating-point load-and-test instructions
These instructions can also be used as comparisons with zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187882 91177308-0d34-0410-b5e6-96231b3b80d8
2013-08-07 11:03:34 +00:00

36 lines
900 B
LLVM

; Test 128-bit floating-point comparison.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; There is no memory form of 128-bit comparison.
define i64 @f1(i64 %a, i64 %b, fp128 *%ptr, float %f2) {
; CHECK-LABEL: f1:
; CHECK: lxebr %f0, %f0
; CHECK: ld %f1, 0(%r4)
; CHECK: ld %f3, 8(%r4)
; CHECK: cxbr %f1, %f0
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f2x = fpext float %f2 to fp128
%f1 = load fp128 *%ptr
%cond = fcmp oeq fp128 %f1, %f2x
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}
; Check comparison with zero.
define i64 @f2(i64 %a, i64 %b, fp128 *%ptr) {
; CHECK-LABEL: f2:
; CHECK: ld %f0, 0(%r4)
; CHECK: ld %f2, 8(%r4)
; CHECK: ltxbr %f0, %f0
; CHECK-NEXT: je
; CHECK: lgr %r2, %r3
; CHECK: br %r14
%f = load fp128 *%ptr
%cond = fcmp oeq fp128 %f, 0xL00000000000000000000000000000000
%res = select i1 %cond, i64 %a, i64 %b
ret i64 %res
}