Add more PPC floating-point conversion instructions

The P7 and A2 have additional floating-point conversion instructions which
allow a direct two-instruction sequence (plus load/store) to convert from all
combinations (signed/unsigned i32/i64) <--> (float/double) (on previous cores,
only some combinations were directly available).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178480 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 191 insertions, 7 deletions

diff --git a/test/CodeGen/PowerPC/float-to-int.ll b/test/CodeGen/PowerPC/float-to-int.ll
new file mode 100644
index 0000000000..ebd0903358
--- /dev/null
+++ b/test/CodeGen/PowerPC/float-to-int.ll
@@ -0,0 +1,92 @@
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+define i64 @foo(float %a) nounwind {
+  %x = fptosi float %a to i64
+  ret i64 %x
+
+; CHECK: @foo
+; CHECK: fctidz [[REG:[0-9]+]], 1
+; CHECK: stfd [[REG]],
+; CHECK: ld 3,
+; CHECK: blr
+}
+
+define i64 @foo2(double %a) nounwind {
+  %x = fptosi double %a to i64
+  ret i64 %x
+
+; CHECK: @foo2
+; CHECK: fctidz [[REG:[0-9]+]], 1
+; CHECK: stfd [[REG]],
+; CHECK: ld 3,
+; CHECK: blr
+}
+
+define i64 @foo3(float %a) nounwind {
+  %x = fptoui float %a to i64
+  ret i64 %x
+
+; CHECK: @foo3
+; CHECK: fctiduz [[REG:[0-9]+]], 1
+; CHECK: stfd [[REG]],
+; CHECK: ld 3,
+; CHECK: blr
+}
+
+define i64 @foo4(double %a) nounwind {
+  %x = fptoui double %a to i64
+  ret i64 %x
+
+; CHECK: @foo4
+; CHECK: fctiduz [[REG:[0-9]+]], 1
+; CHECK: stfd [[REG]],
+; CHECK: ld 3,
+; CHECK: blr
+}
+
+define i32 @goo(float %a) nounwind {
+  %x = fptosi float %a to i32
+  ret i32 %x
+
+; CHECK: @goo
+; CHECK: fctiwz [[REG:[0-9]+]], 1
+; CHECK: stfiwx [[REG]],
+; CHECK: lwz 3,
+; CHECK: blr
+}
+
+define i32 @goo2(double %a) nounwind {
+  %x = fptosi double %a to i32
+  ret i32 %x
+
+; CHECK: @goo2
+; CHECK: fctiwz [[REG:[0-9]+]], 1
+; CHECK: stfiwx [[REG]],
+; CHECK: lwz 3,
+; CHECK: blr
+}
+
+define i32 @goo3(float %a) nounwind {
+  %x = fptoui float %a to i32
+  ret i32 %x
+
+; CHECK: @goo3
+; CHECK: fctiwuz [[REG:[0-9]+]], 1
+; CHECK: stfiwx [[REG]],
+; CHECK: lwz 3,
+; CHECK: blr
+}
+
+define i32 @goo4(double %a) nounwind {
+  %x = fptoui double %a to i32
+  ret i32 %x
+
+; CHECK: @goo4
+; CHECK: fctiwuz [[REG:[0-9]+]], 1
+; CHECK: stfiwx [[REG]],
+; CHECK: lwz 3,
+; CHECK: blr
+}
+
diff --git a/test/CodeGen/PowerPC/i32-to-float.ll b/test/CodeGen/PowerPC/i32-to-float.ll
index bed940c5de..2707d0352d 100644
--- a/test/CodeGen/PowerPC/i32-to-float.ll
+++ b/test/CodeGen/PowerPC/i32-to-float.ll
@@ -1,4 +1,5 @@
 ; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=g5 | FileCheck %s
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr6 | FileCheck -check-prefix=CHECK-PWR6 %s
 ; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 | FileCheck -check-prefix=CHECK-A2 %s
 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
 target triple = "powerpc64-unknown-linux-gnu"
@@ -16,11 +17,17 @@ entry:
 ; CHECK: frsp 1, [[REG3]]
 ; CHECK: blr
 
+; CHECK-PWR6: @foo
+; CHECK-PWR6: stw 3,
+; CHECK-PWR6: lfiwax [[REG:[0-9]+]],
+; CHECK-PWR6: fcfid [[REG2:[0-9]+]], [[REG]]
+; CHECK-PWR6: frsp 1, [[REG2]]
+; CHECK-PWR6: blr
+
 ; CHECK-A2: @foo
 ; CHECK-A2: stw 3,
 ; CHECK-A2: lfiwax [[REG:[0-9]+]],
-; CHECK-A2: fcfid [[REG2:[0-9]+]], [[REG]]
-; CHECK-A2: frsp 1, [[REG2]]
+; CHECK-A2: fcfids 1, [[REG]]
 ; CHECK-A2: blr
 }
 
@@ -36,6 +43,12 @@ entry:
 ; CHECK: fcfid 1, [[REG2]]
 ; CHECK: blr
 
+; CHECK-PWR6: @goo
+; CHECK-PWR6: stw 3,
+; CHECK-PWR6: lfiwax [[REG:[0-9]+]],
+; CHECK-PWR6: fcfid 1, [[REG]]
+; CHECK-PWR6: blr
+
 ; CHECK-A2: @goo
 ; CHECK-A2: stw 3,
 ; CHECK-A2: lfiwax [[REG:[0-9]+]],
@@ -43,3 +56,27 @@ entry:
 ; CHECK-A2: blr
 }
 
+define float @foou(i32 %a) nounwind {
+entry:
+  %x = uitofp i32 %a to float
+  ret float %x
+
+; CHECK-A2: @foou
+; CHECK-A2: stw 3,
+; CHECK-A2: lfiwzx [[REG:[0-9]+]],
+; CHECK-A2: fcfidus 1, [[REG]]
+; CHECK-A2: blr
+}
+
+define double @goou(i32 %a) nounwind {
+entry:
+  %x = uitofp i32 %a to double
+  ret double %x
+
+; CHECK-A2: @goou
+; CHECK-A2: stw 3,
+; CHECK-A2: lfiwzx [[REG:[0-9]+]],
+; CHECK-A2: fcfidu 1, [[REG]]
+; CHECK-A2: blr
+}
+
diff --git a/test/CodeGen/PowerPC/i64-to-float.ll b/test/CodeGen/PowerPC/i64-to-float.ll
new file mode 100644
index 0000000000..b81d109e7f
--- /dev/null
+++ b/test/CodeGen/PowerPC/i64-to-float.ll
@@ -0,0 +1,52 @@
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=a2 | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+define float @foo(i64 %a) nounwind {
+entry:
+  %x = sitofp i64 %a to float
+  ret float %x
+
+; CHECK: @foo
+; CHECK: std 3,
+; CHECK: lfd [[REG:[0-9]+]],
+; CHECK: fcfids 1, [[REG]]
+; CHECK: blr
+}
+
+define double @goo(i64 %a) nounwind {
+entry:
+  %x = sitofp i64 %a to double
+  ret double %x
+
+; CHECK: @goo
+; CHECK: std 3,
+; CHECK: lfd [[REG:[0-9]+]],
+; CHECK: fcfid 1, [[REG]]
+; CHECK: blr
+}
+
+define float @foou(i64 %a) nounwind {
+entry:
+  %x = uitofp i64 %a to float
+  ret float %x
+
+; CHECK: @foou
+; CHECK: std 3,
+; CHECK: lfd [[REG:[0-9]+]],
+; CHECK: fcfidus 1, [[REG]]
+; CHECK: blr
+}
+
+define double @goou(i64 %a) nounwind {
+entry:
+  %x = uitofp i64 %a to double
+  ret double %x
+
+; CHECK: @goou
+; CHECK: std 3,
+; CHECK: lfd [[REG:[0-9]+]],
+; CHECK: fcfidu 1, [[REG]]
+; CHECK: blr
+}
+
diff --git a/test/CodeGen/PowerPC/i64_fp_round.ll b/test/CodeGen/PowerPC/i64_fp_round.ll
index 5ae1be8953..d2a3239ab8 100644
--- a/test/CodeGen/PowerPC/i64_fp_round.ll
+++ b/test/CodeGen/PowerPC/i64_fp_round.ll
@@ -1,4 +1,4 @@
-; RUN: llc -mcpu=pwr7 < %s | FileCheck %s
+; RUN: llc -mcpu=pwr7 -mattr=-fpcvt < %s | FileCheck %s
 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
 target triple = "powerpc64-unknown-linux-gnu"
 
@@ -22,6 +22,6 @@ entry:
 ; Also check that with -enable-unsafe-fp-math we do not get that extra
 ; code sequence.  Simply verify that there is no "isel" present.
 
-; RUN: llc -mcpu=pwr7 -enable-unsafe-fp-math < %s | FileCheck %s -check-prefix=UNSAFE
+; RUN: llc -mcpu=pwr7 -mattr=-fpcvt -enable-unsafe-fp-math < %s | FileCheck %s -check-prefix=UNSAFE
 ; CHECK-UNSAFE-NOT: isel
 
diff --git a/test/CodeGen/PowerPC/stfiwx-2.ll b/test/CodeGen/PowerPC/stfiwx-2.ll
index c49b25cc23..345f1c93e8 100644
--- a/test/CodeGen/PowerPC/stfiwx-2.ll
+++ b/test/CodeGen/PowerPC/stfiwx-2.ll
@@ -1,11 +1,14 @@
-; This cannot be a stfiwx
-; RUN: llc < %s -march=ppc32 -mcpu=g5 | grep stb
-; RUN: llc < %s -march=ppc32 -mcpu=g5 | not grep stfiwx
+; RUN: llc < %s -march=ppc32 -mcpu=g5 | FileCheck %s
 
 define void @test(float %F, i8* %P) {
 	%I = fptosi float %F to i32
 	%X = trunc i32 %I to i8
 	store i8 %X, i8* %P
 	ret void
+; CHECK: fctiwz 0, 1
+; CHECK: stfiwx 0, 0, 4
+; CHECK: lwz 4, 12(1)
+; CHECK: stb 4, 0(3)
+; CHECK: blr
 }