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; Test strict 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
declare float @llvm.experimental.constrained.fptrunc.f32.f64(double, metadata, metadata)
declare float @llvm.experimental.constrained.fptrunc.f32.f128(fp128, metadata, metadata)
declare double @llvm.experimental.constrained.fptrunc.f64.f128(fp128, metadata, metadata)
declare float @llvm.experimental.constrained.fadd.f32(float, float, metadata, metadata)
declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata)
; Test f64->f32.
define float @f1(double %d1, double %d2) #0 {
; CHECK-LABEL: f1:
; CHECK-SCALAR: ledbr %f0, %f2
; CHECK-VECTOR: ledbra %f0, 0, %f2, 0
; CHECK: br %r14
%res = call float @llvm.experimental.constrained.fptrunc.f32.f64(
double %d2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret float %res
}
; Test f128->f32.
define float @f2(ptr %ptr) #0 {
; CHECK-LABEL: f2:
; CHECK: lexbr %f0, %f0
; CHECK: br %r14
%val = load fp128, ptr %ptr
%res = call float @llvm.experimental.constrained.fptrunc.f32.f128(
fp128 %val,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
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) #0 {
; 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 = call float @llvm.experimental.constrained.fptrunc.f32.f128(
fp128 %val,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%res = call float @llvm.experimental.constrained.fadd.f32(
float %conv, float %d2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
store float %res, ptr %dst
ret void
}
; Test f128->f64.
define double @f4(ptr %ptr) #0 {
; CHECK-LABEL: f4:
; CHECK: ldxbr %f0, %f0
; CHECK: br %r14
%val = load fp128, ptr %ptr
%res = call double @llvm.experimental.constrained.fptrunc.f64.f128(
fp128 %val,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
ret double %res
}
; Like f3, but for f128->f64.
define void @f5(ptr %dst, ptr %ptr, double %d1, double %d2) #0 {
; 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 = call double @llvm.experimental.constrained.fptrunc.f64.f128(
fp128 %val,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
%res = call double @llvm.experimental.constrained.fadd.f64(
double %conv, double %d2,
metadata !"round.dynamic",
metadata !"fpexcept.strict") #0
store double %res, ptr %dst
ret void
}
attributes #0 = { strictfp }
|
