[llvm] r342910 - [Power9] [LLVM] Add __float128 exponent GET and SET builtins

[Stefan Pintilie via llvm-commits]

Author: stefanp
Date: Mon Sep 24 11:14:13 2018
New Revision: 342910

URL: http://llvm.org/viewvc/llvm-project?rev=342910&view=rev
Log:
[Power9] [LLVM] Add __float128 exponent GET and SET builtins

Added

__builtin_vsx_scalar_extract_expq
__builtin_vsx_scalar_insert_exp_qp

Builtins should behave the same way as in GCC.

Differential Revision: https://reviews.llvm.org/D48185

Modified:
    llvm/trunk/include/llvm/IR/IntrinsicsPowerPC.td
    llvm/trunk/lib/Target/PowerPC/PPCInstrVSX.td
    llvm/trunk/test/CodeGen/PowerPC/builtins-ppc-p9-f128.ll

Modified: llvm/trunk/include/llvm/IR/IntrinsicsPowerPC.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/IntrinsicsPowerPC.td?rev=342910&r1=342909&r2=342910&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/IntrinsicsPowerPC.td (original)
+++ llvm/trunk/include/llvm/IR/IntrinsicsPowerPC.td Mon Sep 24 11:14:13 2018
@@ -83,6 +83,12 @@ let TargetPrefix = "ppc" in {  // All in
   def int_ppc_fmaf128_round_to_odd
       : GCCBuiltin<"__builtin_fmaf128_round_to_odd">,
         Intrinsic <[llvm_f128_ty], [llvm_f128_ty,llvm_f128_ty,llvm_f128_ty], [IntrNoMem]>;
+  def int_ppc_scalar_extract_expq
+      : GCCBuiltin<"__builtin_vsx_scalar_extract_expq">,
+        Intrinsic <[llvm_i64_ty], [llvm_f128_ty], [IntrNoMem]>;
+  def int_ppc_scalar_insert_exp_qp
+      : GCCBuiltin<"__builtin_vsx_scalar_insert_exp_qp">,
+        Intrinsic <[llvm_f128_ty], [llvm_f128_ty, llvm_i64_ty], [IntrNoMem]>;
 
 }
 

Modified: llvm/trunk/lib/Target/PowerPC/PPCInstrVSX.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCInstrVSX.td?rev=342910&r1=342909&r2=342910&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCInstrVSX.td (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCInstrVSX.td Mon Sep 24 11:14:13 2018
@@ -2671,6 +2671,9 @@ let AddedComplexity = 400, Predicates =
   def XSIEXPQP : XForm_18<63, 868, (outs vrrc:$vT), (ins vrrc:$vA, vsfrc:$vB),
                           "xsiexpqp $vT, $vA, $vB", IIC_VecFP, []>;
 
+  def : Pat<(f128 (int_ppc_scalar_insert_exp_qp f128:$vA, i64:$vB)),
+            (f128 (XSIEXPQP $vA, (MTVSRD $vB)))>;
+
   // Extract Exponent/Significand DP/QP
   def XSXEXPDP : XX2_RT5_XO5_XB6<60,  0, 347, "xsxexpdp", []>;
   def XSXSIGDP : XX2_RT5_XO5_XB6<60,  1, 347, "xsxsigdp", []>;
@@ -2678,6 +2681,10 @@ let AddedComplexity = 400, Predicates =
   def XSXEXPQP : X_VT5_XO5_VB5  <63,  2, 804, "xsxexpqp", []>;
   def XSXSIGQP : X_VT5_XO5_VB5  <63, 18, 804, "xsxsigqp", []>;
 
+  def : Pat<(i64 (int_ppc_scalar_extract_expq  f128:$vA)),
+            (i64 (MFVSRD (EXTRACT_SUBREG
+                           (v2i64 (XSXEXPQP $vA)), sub_64)))>;
+
   // Vector Insert Word
   let UseVSXReg = 1 in {
   // XB NOTE: Only XB.dword[1] is used, but we use vsrc on XB.

Modified: llvm/trunk/test/CodeGen/PowerPC/builtins-ppc-p9-f128.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/builtins-ppc-p9-f128.ll?rev=342910&r1=342909&r2=342910&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/PowerPC/builtins-ppc-p9-f128.ll (original)
+++ llvm/trunk/test/CodeGen/PowerPC/builtins-ppc-p9-f128.ll Mon Sep 24 11:14:13 2018
@@ -101,3 +101,39 @@ entry:
 }
 
 declare double @llvm.ppc.truncf128.round.to.odd(fp128)
+
+; Function Attrs: noinline nounwind optnone
+define fp128 @insert_exp_qp(i64 %b) {
+entry:
+  %b.addr = alloca i64, align 8
+  store i64 %b, i64* %b.addr, align 8
+  %0 = load fp128, fp128* @A, align 16
+  %1 = load i64, i64* %b.addr, align 8
+  %2 = call fp128 @llvm.ppc.scalar.insert.exp.qp(fp128 %0, i64 %1)
+  ret fp128 %2
+; CHECK-LABEL: insert_exp_qp
+; CHECK: mtvsrd [[FPREG:f[0-9]+]], r3
+; CHECK: lxvx [[VECREG:v[0-9]+]]
+; CHECK: xsiexpqp v2, [[VECREG]], [[FPREG]]
+; CHECK: blr
+}
+
+; Function Attrs: nounwind readnone
+declare fp128 @llvm.ppc.scalar.insert.exp.qp(fp128, i64)
+
+; Function Attrs: noinline nounwind optnone
+define i64 @extract_exp() {
+entry:
+  %0 = load fp128, fp128* @A, align 16
+  %1 = call i64 @llvm.ppc.scalar.extract.expq(fp128 %0)
+  ret i64 %1
+; CHECK-LABEL: extract_exp
+; CHECK: lxvx [[VECIN:v[0-9]+]]
+; CHECK: xsxexpqp [[VECOUT:v[0-9]+]], [[VECIN]]
+; CHECK: mfvsrd r3, [[VECOUT]]
+; CHECK: blr
+}
+
+; Function Attrs: nounwind readnone
+declare i64 @llvm.ppc.scalar.extract.expq(fp128)
+