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[SystemZ] Use FI[EDX]BRA for codegen 

llvm-svn: 188895
This commit is contained in:
Richard Sandiford 2013-08-21 09:04:20 +00:00
parent 8e92c389e4
commit af5f66ac9e
4 changed files with 354 additions and 6 deletions
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9
llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
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@ -209,6 +209,15 @@ SystemZTargetLowering::SystemZTargetLowering(SystemZTargetMachine &tm)
// We can use FI for FRINT.
setOperationAction(ISD::FRINT, VT, Legal);
// We can use the extended form of FI for other rounding operations.
if (Subtarget.hasFPExtension()) {
setOperationAction(ISD::FNEARBYINT, VT, Legal);
setOperationAction(ISD::FFLOOR, VT, Legal);
setOperationAction(ISD::FCEIL, VT, Legal);
setOperationAction(ISD::FTRUNC, VT, Legal);
setOperationAction(ISD::FROUND, VT, Legal);
}
// No special instructions for these.
setOperationAction(ISD::FSIN, VT, Expand);
setOperationAction(ISD::FCOS, VT, Expand);

30
llvm/lib/Target/SystemZ/SystemZInstrFP.td
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@ -232,6 +232,36 @@ def : Pat<(frint FP32:$src), (FIEBR 0, FP32:$src)>;
def : Pat<(frint FP64:$src), (FIDBR 0, FP64:$src)>;
def : Pat<(frint FP128:$src), (FIXBR 0, FP128:$src)>;
let Predicates = [FeatureFPExtension] in {
// fnearbyint is like frint but does not detect inexact conditions.
def : Pat<(fnearbyint FP32:$src), (FIEBRA 0, FP32:$src, 4)>;
def : Pat<(fnearbyint FP64:$src), (FIDBRA 0, FP64:$src, 4)>;
def : Pat<(fnearbyint FP128:$src), (FIXBRA 0, FP128:$src, 4)>;
// floor is no longer allowed to raise an inexact condition,
// so restrict it to the cases where the condition can be suppressed.
// Mode 7 is round towards -inf.
def : Pat<(ffloor FP32:$src), (FIEBRA 7, FP32:$src, 4)>;
def : Pat<(ffloor FP64:$src), (FIDBRA 7, FP64:$src, 4)>;
def : Pat<(ffloor FP128:$src), (FIXBRA 7, FP128:$src, 4)>;
// Same idea for ceil, where mode 6 is round towards +inf.
def : Pat<(fceil FP32:$src), (FIEBRA 6, FP32:$src, 4)>;
def : Pat<(fceil FP64:$src), (FIDBRA 6, FP64:$src, 4)>;
def : Pat<(fceil FP128:$src), (FIXBRA 6, FP128:$src, 4)>;
// Same idea for trunc, where mode 5 is round towards zero.
def : Pat<(ftrunc FP32:$src), (FIEBRA 5, FP32:$src, 4)>;
def : Pat<(ftrunc FP64:$src), (FIDBRA 5, FP64:$src, 4)>;
def : Pat<(ftrunc FP128:$src), (FIXBRA 5, FP128:$src, 4)>;
// Same idea for round, where mode 1 is round towards nearest with
// ties away from zero.
def : Pat<(frnd FP32:$src), (FIEBRA 1, FP32:$src, 4)>;
def : Pat<(frnd FP64:$src), (FIDBRA 1, FP64:$src, 4)>;
def : Pat<(frnd FP128:$src), (FIXBRA 1, FP128:$src, 4)>;
}
//===----------------------------------------------------------------------===//
// Binary arithmetic
//===----------------------------------------------------------------------===//

126
llvm/test/CodeGen/SystemZ/fp-round-01.ll
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@ -1,9 +1,8 @@
; Test rint()-like rounding, with non-integer values triggering an
; inexact condition.
; Test rounding functions for z10.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
; Test f32.
; Test rint for f32.
declare float @llvm.rint.f32(float %f)
define float @f1(float %f) {
; CHECK-LABEL: f1:
@ -13,7 +12,7 @@ define float @f1(float %f) {
ret float %res
}
; Test f64.
; Test rint for f64.
declare double @llvm.rint.f64(double %f)
define double @f2(double %f) {
; CHECK-LABEL: f2:
@ -23,7 +22,7 @@ define double @f2(double %f) {
ret double %res
}
; Test f128.
; Test rint for f128.
declare fp128 @llvm.rint.f128(fp128 %f)
define void @f3(fp128 *%ptr) {
; CHECK-LABEL: f3:
@ -34,3 +33,118 @@ define void @f3(fp128 *%ptr) {
store fp128 %res, fp128 *%ptr
ret void
}
; Test nearbyint for f32.
declare float @llvm.nearbyint.f32(float %f)
define float @f4(float %f) {
; CHECK-LABEL: f4:
; CHECK: brasl %r14, nearbyintf@PLT
; CHECK: br %r14
%res = call float @llvm.nearbyint.f32(float %f)
ret float %res
}
; Test nearbyint for f64.
declare double @llvm.nearbyint.f64(double %f)
define double @f5(double %f) {
; CHECK-LABEL: f5:
; CHECK: brasl %r14, nearbyint@PLT
; CHECK: br %r14
%res = call double @llvm.nearbyint.f64(double %f)
ret double %res
}
; Test nearbyint for f128: omitted for now because we cannot handle
; indirect arguments.
; Test floor for f32.
declare float @llvm.floor.f32(float %f)
define float @f7(float %f) {
; CHECK-LABEL: f7:
; CHECK: brasl %r14, floorf@PLT
; CHECK: br %r14
%res = call float @llvm.floor.f32(float %f)
ret float %res
}
; Test floor for f64.
declare double @llvm.floor.f64(double %f)
define double @f8(double %f) {
; CHECK-LABEL: f8:
; CHECK: brasl %r14, floor@PLT
; CHECK: br %r14
%res = call double @llvm.floor.f64(double %f)
ret double %res
}
; Test floor for f128: omitted for now because we cannot handle
; indirect arguments.
; Test ceil for f32.
declare float @llvm.ceil.f32(float %f)
define float @f10(float %f) {
; CHECK-LABEL: f10:
; CHECK: brasl %r14, ceilf@PLT
; CHECK: br %r14
%res = call float @llvm.ceil.f32(float %f)
ret float %res
}
; Test ceil for f64.
declare double @llvm.ceil.f64(double %f)
define double @f11(double %f) {
; CHECK-LABEL: f11:
; CHECK: brasl %r14, ceil@PLT
; CHECK: br %r14
%res = call double @llvm.ceil.f64(double %f)
ret double %res
}
; Test ceil for f128: omitted for now because we cannot handle
; indirect arguments.
; Test trunc for f32.
declare float @llvm.trunc.f32(float %f)
define float @f13(float %f) {
; CHECK-LABEL: f13:
; CHECK: brasl %r14, truncf@PLT
; CHECK: br %r14
%res = call float @llvm.trunc.f32(float %f)
ret float %res
}
; Test trunc for f64.
declare double @llvm.trunc.f64(double %f)
define double @f14(double %f) {
; CHECK-LABEL: f14:
; CHECK: brasl %r14, trunc@PLT
; CHECK: br %r14
%res = call double @llvm.trunc.f64(double %f)
ret double %res
}
; Test trunc for f128: omitted for now because we cannot handle
; indirect arguments.
; Test round for f32.
declare float @llvm.round.f32(float %f)
define float @f16(float %f) {
; CHECK-LABEL: f16:
; CHECK: brasl %r14, roundf@PLT
; CHECK: br %r14
%res = call float @llvm.round.f32(float %f)
ret float %res
}
; Test round for f64.
declare double @llvm.round.f64(double %f)
define double @f17(double %f) {
; CHECK-LABEL: f17:
; CHECK: brasl %r14, round@PLT
; CHECK: br %r14
%res = call double @llvm.round.f64(double %f)
ret double %res
}
; Test round for f128: omitted for now because we cannot handle
; indirect arguments.

195
llvm/test/CodeGen/SystemZ/fp-round-02.ll Normal file
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@ -0,0 +1,195 @@
; Test rounding functions for z196 and above.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
; Test rint for f32.
declare float @llvm.rint.f32(float %f)
define float @f1(float %f) {
; CHECK-LABEL: f1:
; CHECK: fiebr %f0, 0, %f0
; CHECK: br %r14
%res = call float @llvm.rint.f32(float %f)
ret float %res
}
; Test rint for f64.
declare double @llvm.rint.f64(double %f)
define double @f2(double %f) {
; CHECK-LABEL: f2:
; CHECK: fidbr %f0, 0, %f0
; CHECK: br %r14
%res = call double @llvm.rint.f64(double %f)
ret double %res
}
; Test rint for f128.
declare fp128 @llvm.rint.f128(fp128 %f)
define void @f3(fp128 *%ptr) {
; CHECK-LABEL: f3:
; CHECK: fixbr %f0, 0, %f0
; CHECK: br %r14
%src = load fp128 *%ptr
%res = call fp128 @llvm.rint.f128(fp128 %src)
store fp128 %res, fp128 *%ptr
ret void
}
; Test nearbyint for f32.
declare float @llvm.nearbyint.f32(float %f)
define float @f4(float %f) {
; CHECK-LABEL: f4:
; CHECK: fiebra %f0, 0, %f0, 4
; CHECK: br %r14
%res = call float @llvm.nearbyint.f32(float %f)
ret float %res
}
; Test nearbyint for f64.
declare double @llvm.nearbyint.f64(double %f)
define double @f5(double %f) {
; CHECK-LABEL: f5:
; CHECK: fidbra %f0, 0, %f0, 4
; CHECK: br %r14
%res = call double @llvm.nearbyint.f64(double %f)
ret double %res
}
; Test nearbyint for f128.
declare fp128 @llvm.nearbyint.f128(fp128 %f)
define void @f6(fp128 *%ptr) {
; CHECK-LABEL: f6:
; CHECK: fixbra %f0, 0, %f0, 4
; CHECK: br %r14
%src = load fp128 *%ptr
%res = call fp128 @llvm.nearbyint.f128(fp128 %src)
store fp128 %res, fp128 *%ptr
ret void
}
; Test floor for f32.
declare float @llvm.floor.f32(float %f)
define float @f7(float %f) {
; CHECK-LABEL: f7:
; CHECK: fiebra %f0, 7, %f0, 4
; CHECK: br %r14
%res = call float @llvm.floor.f32(float %f)
ret float %res
}
; Test floor for f64.
declare double @llvm.floor.f64(double %f)
define double @f8(double %f) {
; CHECK-LABEL: f8:
; CHECK: fidbra %f0, 7, %f0, 4
; CHECK: br %r14
%res = call double @llvm.floor.f64(double %f)
ret double %res
}
; Test floor for f128.
declare fp128 @llvm.floor.f128(fp128 %f)
define void @f9(fp128 *%ptr) {
; CHECK-LABEL: f9:
; CHECK: fixbra %f0, 7, %f0, 4
; CHECK: br %r14
%src = load fp128 *%ptr
%res = call fp128 @llvm.floor.f128(fp128 %src)
store fp128 %res, fp128 *%ptr
ret void
}
; Test ceil for f32.
declare float @llvm.ceil.f32(float %f)
define float @f10(float %f) {
; CHECK-LABEL: f10:
; CHECK: fiebra %f0, 6, %f0, 4
; CHECK: br %r14
%res = call float @llvm.ceil.f32(float %f)
ret float %res
}
; Test ceil for f64.
declare double @llvm.ceil.f64(double %f)
define double @f11(double %f) {
; CHECK-LABEL: f11:
; CHECK: fidbra %f0, 6, %f0, 4
; CHECK: br %r14
%res = call double @llvm.ceil.f64(double %f)
ret double %res
}
; Test ceil for f128.
declare fp128 @llvm.ceil.f128(fp128 %f)
define void @f12(fp128 *%ptr) {
; CHECK-LABEL: f12:
; CHECK: fixbra %f0, 6, %f0, 4
; CHECK: br %r14
%src = load fp128 *%ptr
%res = call fp128 @llvm.ceil.f128(fp128 %src)
store fp128 %res, fp128 *%ptr
ret void
}
; Test trunc for f32.
declare float @llvm.trunc.f32(float %f)
define float @f13(float %f) {
; CHECK-LABEL: f13:
; CHECK: fiebra %f0, 5, %f0, 4
; CHECK: br %r14
%res = call float @llvm.trunc.f32(float %f)
ret float %res
}
; Test trunc for f64.
declare double @llvm.trunc.f64(double %f)
define double @f14(double %f) {
; CHECK-LABEL: f14:
; CHECK: fidbra %f0, 5, %f0, 4
; CHECK: br %r14
%res = call double @llvm.trunc.f64(double %f)
ret double %res
}
; Test trunc for f128.
declare fp128 @llvm.trunc.f128(fp128 %f)
define void @f15(fp128 *%ptr) {
; CHECK-LABEL: f15:
; CHECK: fixbra %f0, 5, %f0, 4
; CHECK: br %r14
%src = load fp128 *%ptr
%res = call fp128 @llvm.trunc.f128(fp128 %src)
store fp128 %res, fp128 *%ptr
ret void
}
; Test round for f32.
declare float @llvm.round.f32(float %f)
define float @f16(float %f) {
; CHECK-LABEL: f16:
; CHECK: fiebra %f0, 1, %f0, 4
; CHECK: br %r14
%res = call float @llvm.round.f32(float %f)
ret float %res
}
; Test round for f64.
declare double @llvm.round.f64(double %f)
define double @f17(double %f) {
; CHECK-LABEL: f17:
; CHECK: fidbra %f0, 1, %f0, 4
; CHECK: br %r14
%res = call double @llvm.round.f64(double %f)
ret double %res
}
; Test round for f128.
declare fp128 @llvm.round.f128(fp128 %f)
define void @f18(fp128 *%ptr) {
; CHECK-LABEL: f18:
; CHECK: fixbra %f0, 1, %f0, 4
; CHECK: br %r14
%src = load fp128 *%ptr
%res = call fp128 @llvm.round.f128(fp128 %src)
store fp128 %res, fp128 *%ptr
ret void
}