Doubleword Shift Left Logical Plus 32

Mips shift instructions DSLL, DSRL and DSRA are transformed into
DSLL32, DSRL32 and DSRA32 respectively if the shift amount is between
32 and 63

Here is a description of DSLL:

Purpose: Doubleword Shift Left Logical Plus 32
To execute a left-shift of a doubleword by a fixed amount--32 to 63 bits

Description: GPR[rd] <- GPR[rt] << (sa+32)

The 64-bit doubleword contents of GPR rt are shifted left, inserting
 zeros into the emptied bits; the result is placed in
GPR rd. The bit-shift amount in the range 0 to 31 is specified by sa.

This patch implements the direct object output of these instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160277 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 45 insertions, 0 deletions

diff --git a/test/MC/Mips/mips64shift.ll b/test/MC/Mips/mips64shift.ll
new file mode 100644
index 0000000000..7817b96fa5
--- /dev/null
+++ b/test/MC/Mips/mips64shift.ll
@@ -0,0 +1,45 @@
+; RUN: llc -march=mips64el -filetype=obj -mcpu=mips64r2 %s -o - | llvm-objdump -disassemble -triple mips64el - | FileCheck %s
+
+
+define i64 @f3(i64 %a0) nounwind readnone {
+entry:
+; CHECK: dsll ${{[0-9]+}}, ${{[0-9]+}}, 10
+  %shl = shl i64 %a0, 10
+  ret i64 %shl
+}
+
+define i64 @f4(i64 %a0) nounwind readnone {
+entry:
+; CHECK: dsra ${{[0-9]+}}, ${{[0-9]+}}, 10
+  %shr = ashr i64 %a0, 10
+  ret i64 %shr
+}
+
+define i64 @f5(i64 %a0) nounwind readnone {
+entry:
+; CHECK: dsrl ${{[0-9]+}}, ${{[0-9]+}}, 10
+  %shr = lshr i64 %a0, 10
+  ret i64 %shr
+}
+
+define i64 @f6(i64 %a0) nounwind readnone {
+entry:
+; CHECK: dsll32 ${{[0-9]+}}, ${{[0-9]+}}, 8
+  %shl = shl i64 %a0, 40
+  ret i64 %shl
+}
+
+define i64 @f7(i64 %a0) nounwind readnone {
+entry:
+; CHECK: dsra32 ${{[0-9]+}}, ${{[0-9]+}}, 8
+  %shr = ashr i64 %a0, 40
+  ret i64 %shr
+}
+
+define i64 @f8(i64 %a0) nounwind readnone {
+entry:
+; CHECK: dsrl32 ${{[0-9]+}}, ${{[0-9]+}}, 8
+  %shr = lshr i64 %a0, 40
+  ret i64 %shr
+}
+