94a14f9f0d
Add a DAGCombine for FCOPYSIGN that removes the rounding which is never needed as the sign bit is already in the correct place. This helps in particular the rounding to f16 case which needs a libcall. Also remove the roundings for other FP VTs and simplify the CPSDR patterns correspondingly. fp-copysign-03.ll test updated, now also covering the other FP VT combinations.
129 lines
3.8 KiB
LLVM
129 lines
3.8 KiB
LLVM
; Test copysign libcalls.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
declare float @copysignf(float, float) readnone
|
|
declare double @copysign(double, double) readnone
|
|
; FIXME: not really the correct prototype for SystemZ.
|
|
declare fp128 @copysignl(fp128, fp128) readnone
|
|
|
|
; Test f32 copies in which the sign comes from an f32.
|
|
define float @f1(float %a, float %b) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK-NOT: %f2
|
|
; CHECK: cpsdr %f0, %f2, %f0
|
|
; CHECK: br %r14
|
|
%res = call float @copysignf(float %a, float %b) readnone
|
|
ret float %res
|
|
}
|
|
|
|
; Test f32 copies in which the sign comes from an f64.
|
|
define float @f2(float %a, double %bd) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK-NOT: %f2
|
|
; CHECK: cpsdr %f0, %f2, %f0
|
|
; CHECK: br %r14
|
|
%b = fptrunc double %bd to float
|
|
%res = call float @copysignf(float %a, float %b) readnone
|
|
ret float %res
|
|
}
|
|
|
|
; Test f32 copies in which the sign comes from an f128.
|
|
define float @f3(float %a, ptr %bptr) {
|
|
; CHECK-LABEL: f3:
|
|
; CHECK: ld [[BHIGH:%f[0-7]]], 0(%r2)
|
|
; CHECK: ld [[BLOW:%f[0-7]]], 8(%r2)
|
|
; CHECK: cpsdr %f0, [[BHIGH]], %f0
|
|
; CHECK: br %r14
|
|
%bl = load volatile fp128, ptr %bptr
|
|
%b = fptrunc fp128 %bl to float
|
|
%res = call float @copysignf(float %a, float %b) readnone
|
|
ret float %res
|
|
}
|
|
|
|
; Test f64 copies in which the sign comes from an f32.
|
|
define double @f4(double %a, float %bf) {
|
|
; CHECK-LABEL: f4:
|
|
; CHECK-NOT: %f2
|
|
; CHECK: cpsdr %f0, %f2, %f0
|
|
; CHECK: br %r14
|
|
%b = fpext float %bf to double
|
|
%res = call double @copysign(double %a, double %b) readnone
|
|
ret double %res
|
|
}
|
|
|
|
; Test f64 copies in which the sign comes from an f64.
|
|
define double @f5(double %a, double %b) {
|
|
; CHECK-LABEL: f5:
|
|
; CHECK-NOT: %f2
|
|
; CHECK: cpsdr %f0, %f2, %f0
|
|
; CHECK: br %r14
|
|
%res = call double @copysign(double %a, double %b) readnone
|
|
ret double %res
|
|
}
|
|
|
|
; Test f64 copies in which the sign comes from an f128.
|
|
define double @f6(double %a, ptr %bptr) {
|
|
; CHECK-LABEL: f6:
|
|
; CHECK: ld [[BHIGH:%f[0-7]]], 0(%r2)
|
|
; CHECK: ld [[BLOW:%f[0-7]]], 8(%r2)
|
|
; CHECK: cpsdr %f0, [[BHIGH]], %f0
|
|
; CHECK: br %r14
|
|
%bl = load volatile fp128, ptr %bptr
|
|
%b = fptrunc fp128 %bl to double
|
|
%res = call double @copysign(double %a, double %b) readnone
|
|
ret double %res
|
|
}
|
|
|
|
; Test f128 copies in which the sign comes from an f32. We shouldn't
|
|
; need any register shuffling here; %a should be tied to %c, with CPSDR
|
|
; just changing the high register.
|
|
define void @f7(ptr %cptr, ptr %aptr, float %bf) {
|
|
; CHECK-LABEL: f7:
|
|
; CHECK: ld [[AHIGH:%f[0-7]]], 0(%r3)
|
|
; CHECK: ld [[ALOW:%f[0-7]]], 8(%r3)
|
|
; CHECK: cpsdr [[AHIGH]], %f0, [[AHIGH]]
|
|
; CHECK: std [[AHIGH]], 0(%r2)
|
|
; CHECK: std [[ALOW]], 8(%r2)
|
|
; CHECK: br %r14
|
|
%a = load volatile fp128, ptr %aptr
|
|
%b = fpext float %bf to fp128
|
|
%c = call fp128 @copysignl(fp128 %a, fp128 %b) readnone
|
|
store fp128 %c, ptr %cptr
|
|
ret void
|
|
}
|
|
|
|
; As above, but the sign comes from an f64.
|
|
define void @f8(ptr %cptr, ptr %aptr, double %bd) {
|
|
; CHECK-LABEL: f8:
|
|
; CHECK: ld [[AHIGH:%f[0-7]]], 0(%r3)
|
|
; CHECK: ld [[ALOW:%f[0-7]]], 8(%r3)
|
|
; CHECK: cpsdr [[AHIGH]], %f0, [[AHIGH]]
|
|
; CHECK: std [[AHIGH]], 0(%r2)
|
|
; CHECK: std [[ALOW]], 8(%r2)
|
|
; CHECK: br %r14
|
|
%a = load volatile fp128, ptr %aptr
|
|
%b = fpext double %bd to fp128
|
|
%c = call fp128 @copysignl(fp128 %a, fp128 %b) readnone
|
|
store fp128 %c, ptr %cptr
|
|
ret void
|
|
}
|
|
|
|
; As above, but the sign comes from an f128. Don't require the low part
|
|
; of %b to be loaded, since it isn't used.
|
|
define void @f9(ptr %cptr, ptr %aptr, ptr %bptr) {
|
|
; CHECK-LABEL: f9:
|
|
; CHECK: ld [[AHIGH:%f[0-7]]], 0(%r3)
|
|
; CHECK: ld [[ALOW:%f[0-7]]], 8(%r3)
|
|
; CHECK: ld [[BHIGH:%f[0-7]]], 0(%r4)
|
|
; CHECK: cpsdr [[AHIGH]], [[BHIGH]], [[AHIGH]]
|
|
; CHECK: std [[AHIGH]], 0(%r2)
|
|
; CHECK: std [[ALOW]], 8(%r2)
|
|
; CHECK: br %r14
|
|
%a = load volatile fp128, ptr %aptr
|
|
%b = load volatile fp128, ptr %bptr
|
|
%c = call fp128 @copysignl(fp128 %a, fp128 %b) readnone
|
|
store fp128 %c, ptr %cptr
|
|
ret void
|
|
}
|