llvm-6502/test/CodeGen/SystemZ/fp-conv-01.ll
Ulrich Weigand b503b49b51 [SystemZ] Add CodeGen test cases
This adds all CodeGen tests for the SystemZ target.

This version of the patch incorporates feedback from a review by
Sean Silva.  Thanks to all reviewers!

Patch by Richard Sandiford.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181204 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-06 16:17:29 +00:00

62 lines
1.4 KiB
LLVM

; Test floating-point truncations.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; Test f64->f32.
define float @f1(double %d1, double %d2) {
; CHECK: f1:
; CHECK: ledbr %f0, %f2
; CHECK: br %r14
%res = fptrunc double %d2 to float
ret float %res
}
; Test f128->f32.
define float @f2(fp128 *%ptr) {
; CHECK: f2:
; CHECK: lexbr %f0, %f0
; CHECK: br %r14
%val = load fp128 *%ptr
%res = fptrunc fp128 %val to float
ret float %res
}
; Make sure that we don't use %f0 as the destination of LEXBR when %f2
; is still live.
define void @f3(float *%dst, fp128 *%ptr, float %d1, float %d2) {
; CHECK: f3:
; CHECK: lexbr %f1, %f1
; CHECK: aebr %f1, %f2
; CHECK: ste %f1, 0(%r2)
; CHECK: br %r14
%val = load fp128 *%ptr
%conv = fptrunc fp128 %val to float
%res = fadd float %conv, %d2
store float %res, float *%dst
ret void
}
; Test f128->f64.
define double @f4(fp128 *%ptr) {
; CHECK: f4:
; CHECK: ldxbr %f0, %f0
; CHECK: br %r14
%val = load fp128 *%ptr
%res = fptrunc fp128 %val to double
ret double %res
}
; Like f3, but for f128->f64.
define void @f5(double *%dst, fp128 *%ptr, double %d1, double %d2) {
; CHECK: f5:
; CHECK: ldxbr %f1, %f1
; CHECK: adbr %f1, %f2
; CHECK: std %f1, 0(%r2)
; CHECK: br %r14
%val = load fp128 *%ptr
%conv = fptrunc fp128 %val to double
%res = fadd double %conv, %d2
store double %res, double *%dst
ret void
}