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llvm-mirror/test/CodeGen/SystemZ/int-sub-09.ll
Richard Sandiford fe2faa0d5b [SystemZ] Add ALRK, AGLRK, SLRK and SGLRK
Follows the same lines as r186686, but much more limited, since we only
use ADD LOGICAL for multi-i64 additions.

llvm-svn: 186689
2013-07-19 16:37:00 +00:00

23 lines
777 B
LLVM

; Test 128-bit subtraction when the distinct-operands facility is available.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
; Test the case where both operands are in registers.
define i64 @f1(i64 %a, i64 %b, i64 %c, i64 %d, i64 *%ptr) {
; CHECK-LABEL: f1:
; CHECK: slgrk %r2, %r4, %r5
; CHECK: slbgr
; CHECK: br %r14
%x1 = insertelement <2 x i64> undef, i64 %b, i32 0
%x2 = insertelement <2 x i64> %x1, i64 %c, i32 1
%x = bitcast <2 x i64> %x2 to i128
%y2 = insertelement <2 x i64> %x1, i64 %d, i32 1
%y = bitcast <2 x i64> %y2 to i128
%sub = sub i128 %x, %y
%subv = bitcast i128 %sub to <2 x i64>
%high = extractelement <2 x i64> %subv, i32 0
store i64 %high, i64 *%ptr
%low = extractelement <2 x i64> %subv, i32 1
ret i64 %low
}