| ; Test floating-point truncations. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \ |
| ; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 \ |
| ; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-VECTOR %s |
| |
| ; Test f64->f32. |
| define float @f1(double %d1, double %d2) { |
| ; CHECK-LABEL: f1: |
| ; CHECK-SCALAR: ledbr %f0, %f2 |
| ; CHECK-VECTOR: ledbra %f0, 0, %f2, 0 |
| ; CHECK: br %r14 |
| %res = fptrunc double %d2 to float |
| ret float %res |
| } |
| |
| ; Test f128->f32. |
| define float @f2(ptr %ptr) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: lexbr %f0, %f0 |
| ; CHECK: br %r14 |
| %val = load fp128, ptr %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(ptr %dst, ptr %ptr, float %d1, float %d2) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: lexbr %f1, %f1 |
| ; CHECK: aebr %f1, %f2 |
| ; CHECK: ste %f1, 0(%r2) |
| ; CHECK: br %r14 |
| %val = load fp128, ptr %ptr |
| %conv = fptrunc fp128 %val to float |
| %res = fadd float %conv, %d2 |
| store float %res, ptr %dst |
| ret void |
| } |
| |
| ; Test f128->f64. |
| define double @f4(ptr %ptr) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: ldxbr %f0, %f0 |
| ; CHECK: br %r14 |
| %val = load fp128, ptr %ptr |
| %res = fptrunc fp128 %val to double |
| ret double %res |
| } |
| |
| ; Like f3, but for f128->f64. |
| define void @f5(ptr %dst, ptr %ptr, double %d1, double %d2) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: ldxbr %f1, %f1 |
| ; CHECK-SCALAR: adbr %f1, %f2 |
| ; CHECK-SCALAR: std %f1, 0(%r2) |
| ; CHECK-VECTOR: wfadb [[REG:%f[0-9]+]], %f1, %f2 |
| ; CHECK-VECTOR: std [[REG]], 0(%r2) |
| ; CHECK: br %r14 |
| %val = load fp128, ptr %ptr |
| %conv = fptrunc fp128 %val to double |
| %res = fadd double %conv, %d2 |
| store double %res, ptr %dst |
| ret void |
| } |