; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3 ; Test high-part i64->i128 multiplications on z13. ; ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s ; Check zero-extended multiplication in which only the high part is used. define i64 @f1(i64 %dummy, i64 %a, i64 %b) { ; CHECK-LABEL: f1: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlgr %r2, %r4 ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check sign-extended multiplication in which only the high part is used. ; This needs a rather convoluted sequence. define i64 @f2(i64 %dummy, i64 %a, i64 %b) { ; CHECK-LABEL: f2: ; CHECK: # %bb.0: ; CHECK-NEXT: srag %r1, %r4, 63 ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: srag %r0, %r3, 63 ; CHECK-NEXT: ngr %r1, %r3 ; CHECK-NEXT: mlgr %r2, %r4 ; CHECK-NEXT: ngr %r0, %r4 ; CHECK-NEXT: agr %r0, %r1 ; CHECK-NEXT: sgr %r2, %r0 ; CHECK-NEXT: br %r14 %ax = sext i64 %a to i128 %bx = sext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check zero-extended multiplication in which only part of the high half ; is used. define i64 @f3(i64 %dummy, i64 %a, i64 %b) { ; CHECK-LABEL: f3: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlgr %r2, %r4 ; CHECK-NEXT: srlg %r2, %r2, 3 ; CHECK-NEXT: br %r14 %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 67 %high = trunc i128 %highx to i64 ret i64 %high } ; Check zero-extended multiplication in which the result is split into ; high and low halves. define i64 @f4(i64 %dummy, i64 %a, i64 %b) { ; CHECK-LABEL: f4: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlgr %r2, %r4 ; CHECK-NEXT: ogr %r2, %r3 ; CHECK-NEXT: br %r14 %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 %low = trunc i128 %mulx to i64 %or = or i64 %high, %low ret i64 %or } ; Check division by a constant, which should use multiplication instead. define i64 @f5(i64 %dummy, i64 %a) { ; CHECK-LABEL: f5: ; CHECK: # %bb.0: ; CHECK-NEXT: llihf %r0, 1782028570 ; CHECK-NEXT: oilf %r0, 598650223 ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlgr %r2, %r0 ; CHECK-NEXT: srlg %r2, %r2, 9 ; CHECK-NEXT: br %r14 %res = udiv i64 %a, 1234 ret i64 %res } ; Check MLG with no displacement. define i64 @f6(i64 %dummy, i64 %a, ptr %src) { ; CHECK-LABEL: f6: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, 0(%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %b = load i64, ptr %src %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check the high end of the aligned MLG range. define i64 @f7(i64 %dummy, i64 %a, ptr %src) { ; CHECK-LABEL: f7: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, 524280(%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %ptr = getelementptr i64, ptr %src, i64 65535 %b = load i64, ptr %ptr %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check the next doubleword up, which requires separate address logic. ; Other sequences besides this one would be OK. define i64 @f8(i64 %dummy, i64 %a, ptr %src) { ; CHECK-LABEL: f8: ; CHECK: # %bb.0: ; CHECK-NEXT: agfi %r4, 524288 ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, 0(%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %ptr = getelementptr i64, ptr %src, i64 65536 %b = load i64, ptr %ptr %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check the high end of the negative aligned MLG range. define i64 @f9(i64 %dummy, i64 %a, ptr %src) { ; CHECK-LABEL: f9: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, -8(%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %ptr = getelementptr i64, ptr %src, i64 -1 %b = load i64, ptr %ptr %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check the low end of the MLG range. define i64 @f10(i64 %dummy, i64 %a, ptr %src) { ; CHECK-LABEL: f10: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, -524288(%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %ptr = getelementptr i64, ptr %src, i64 -65536 %b = load i64, ptr %ptr %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check the next doubleword down, which needs separate address logic. ; Other sequences besides this one would be OK. define i64 @f11(ptr %dest, i64 %a, ptr %src) { ; CHECK-LABEL: f11: ; CHECK: # %bb.0: ; CHECK-NEXT: agfi %r4, -524296 ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, 0(%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %ptr = getelementptr i64, ptr %src, i64 -65537 %b = load i64, ptr %ptr %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high } ; Check that MLG allows an index. define i64 @f12(ptr %dest, i64 %a, i64 %src, i64 %index) { ; CHECK-LABEL: f12: ; CHECK: # %bb.0: ; CHECK-NEXT: # kill: def $r3d killed $r3d def $r2q ; CHECK-NEXT: mlg %r2, 524287(%r5,%r4) ; CHECK-NEXT: # kill: def $r2d killed $r2d killed $r2q ; CHECK-NEXT: br %r14 %add1 = add i64 %src, %index %add2 = add i64 %add1, 524287 %ptr = inttoptr i64 %add2 to ptr %b = load i64, ptr %ptr %ax = zext i64 %a to i128 %bx = zext i64 %b to i128 %mulx = mul i128 %ax, %bx %highx = lshr i128 %mulx, 64 %high = trunc i128 %highx to i64 ret i64 %high }