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The z13 vector facility includes some instructions that operate only on the high f64 in a v2f64, effectively extending the FP register set from 16 to 32 registers. It's still better to use the old instructions if the operands happen to fit though, since the older instructions have a shorter encoding. Based on a patch by Richard Sandiford. llvm-svn: 236524
47 lines
1.3 KiB
LLVM
47 lines
1.3 KiB
LLVM
; Test f64 and v2f64 absolute.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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declare double @llvm.fabs.f64(double)
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declare <2 x double> @llvm.fabs.v2f64(<2 x double>)
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; Test a plain absolute.
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define <2 x double> @f1(<2 x double> %val) {
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; CHECK-LABEL: f1:
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; CHECK: vflpdb %v24, %v24
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; CHECK: br %r14
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%ret = call <2 x double> @llvm.fabs.v2f64(<2 x double> %val)
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ret <2 x double> %ret
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}
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; Test a negative absolute.
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define <2 x double> @f2(<2 x double> %val) {
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; CHECK-LABEL: f2:
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; CHECK: vflndb %v24, %v24
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; CHECK: br %r14
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%abs = call <2 x double> @llvm.fabs.v2f64(<2 x double> %val)
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%ret = fsub <2 x double> <double -0.0, double -0.0>, %abs
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ret <2 x double> %ret
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}
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; Test an f64 absolute that uses vector registers.
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define double @f3(<2 x double> %val) {
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; CHECK-LABEL: f3:
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; CHECK: wflpdb %f0, %v24
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; CHECK: br %r14
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%scalar = extractelement <2 x double> %val, i32 0
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%ret = call double @llvm.fabs.f64(double %scalar)
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ret double %ret
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}
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; Test an f64 negative absolute that uses vector registers.
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define double @f4(<2 x double> %val) {
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; CHECK-LABEL: f4:
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; CHECK: wflndb %f0, %v24
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; CHECK: br %r14
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%scalar = extractelement <2 x double> %val, i32 0
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%abs = call double @llvm.fabs.f64(double %scalar)
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%ret = fsub double -0.0, %abs
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ret double %ret
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}
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