| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s --check-prefix=ALL |
| |
| ; If the target does not have a single div/rem operation, |
| ; -div-rem-pairs pass will decompose the remainder calculation as: |
| ; X % Y --> X - ((X / Y) * Y) |
| ; But if the target does have a single div/rem operation, |
| ; the opposite transform is likely beneficial. |
| |
| define i8 @scalar_i8(i8 %x, i8 %y, i8* %divdst) nounwind { |
| ; ALL-LABEL: scalar_i8: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: and w8, w1, #0xff |
| ; ALL-NEXT: and w9, w0, #0xff |
| ; ALL-NEXT: udiv w8, w9, w8 |
| ; ALL-NEXT: msub w0, w8, w1, w0 |
| ; ALL-NEXT: strb w8, [x2] |
| ; ALL-NEXT: ret |
| %div = udiv i8 %x, %y |
| store i8 %div, i8* %divdst, align 4 |
| %t1 = mul i8 %div, %y |
| %t2 = sub i8 %x, %t1 |
| ret i8 %t2 |
| } |
| |
| define i16 @scalar_i16(i16 %x, i16 %y, i16* %divdst) nounwind { |
| ; ALL-LABEL: scalar_i16: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: and w8, w1, #0xffff |
| ; ALL-NEXT: and w9, w0, #0xffff |
| ; ALL-NEXT: udiv w8, w9, w8 |
| ; ALL-NEXT: msub w0, w8, w1, w0 |
| ; ALL-NEXT: strh w8, [x2] |
| ; ALL-NEXT: ret |
| %div = udiv i16 %x, %y |
| store i16 %div, i16* %divdst, align 4 |
| %t1 = mul i16 %div, %y |
| %t2 = sub i16 %x, %t1 |
| ret i16 %t2 |
| } |
| |
| define i32 @scalar_i32(i32 %x, i32 %y, i32* %divdst) nounwind { |
| ; ALL-LABEL: scalar_i32: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: udiv w8, w0, w1 |
| ; ALL-NEXT: msub w0, w8, w1, w0 |
| ; ALL-NEXT: str w8, [x2] |
| ; ALL-NEXT: ret |
| %div = udiv i32 %x, %y |
| store i32 %div, i32* %divdst, align 4 |
| %t1 = mul i32 %div, %y |
| %t2 = sub i32 %x, %t1 |
| ret i32 %t2 |
| } |
| |
| define i64 @scalar_i64(i64 %x, i64 %y, i64* %divdst) nounwind { |
| ; ALL-LABEL: scalar_i64: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: udiv x8, x0, x1 |
| ; ALL-NEXT: msub x0, x8, x1, x0 |
| ; ALL-NEXT: str x8, [x2] |
| ; ALL-NEXT: ret |
| %div = udiv i64 %x, %y |
| store i64 %div, i64* %divdst, align 4 |
| %t1 = mul i64 %div, %y |
| %t2 = sub i64 %x, %t1 |
| ret i64 %t2 |
| } |
| |
| define <16 x i8> @vector_i128_i8(<16 x i8> %x, <16 x i8> %y, <16 x i8>* %divdst) nounwind { |
| ; ALL-LABEL: vector_i128_i8: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: umov w8, v1.b[1] |
| ; ALL-NEXT: umov w9, v0.b[1] |
| ; ALL-NEXT: umov w10, v0.b[0] |
| ; ALL-NEXT: umov w11, v0.b[2] |
| ; ALL-NEXT: umov w12, v0.b[3] |
| ; ALL-NEXT: umov w13, v0.b[4] |
| ; ALL-NEXT: umov w14, v0.b[5] |
| ; ALL-NEXT: umov w15, v0.b[6] |
| ; ALL-NEXT: udiv w8, w9, w8 |
| ; ALL-NEXT: umov w9, v1.b[0] |
| ; ALL-NEXT: umov w16, v0.b[7] |
| ; ALL-NEXT: umov w17, v0.b[8] |
| ; ALL-NEXT: udiv w9, w10, w9 |
| ; ALL-NEXT: umov w10, v1.b[2] |
| ; ALL-NEXT: udiv w10, w11, w10 |
| ; ALL-NEXT: umov w11, v1.b[3] |
| ; ALL-NEXT: fmov s2, w9 |
| ; ALL-NEXT: umov w9, v1.b[9] |
| ; ALL-NEXT: mov v2.b[1], w8 |
| ; ALL-NEXT: udiv w11, w12, w11 |
| ; ALL-NEXT: umov w12, v1.b[4] |
| ; ALL-NEXT: mov v2.b[2], w10 |
| ; ALL-NEXT: umov w10, v0.b[10] |
| ; ALL-NEXT: udiv w12, w13, w12 |
| ; ALL-NEXT: umov w13, v1.b[5] |
| ; ALL-NEXT: mov v2.b[3], w11 |
| ; ALL-NEXT: umov w11, v0.b[11] |
| ; ALL-NEXT: udiv w13, w14, w13 |
| ; ALL-NEXT: umov w14, v1.b[6] |
| ; ALL-NEXT: mov v2.b[4], w12 |
| ; ALL-NEXT: umov w12, v0.b[12] |
| ; ALL-NEXT: udiv w14, w15, w14 |
| ; ALL-NEXT: umov w15, v1.b[7] |
| ; ALL-NEXT: mov v2.b[5], w13 |
| ; ALL-NEXT: umov w13, v0.b[13] |
| ; ALL-NEXT: udiv w15, w16, w15 |
| ; ALL-NEXT: umov w16, v1.b[8] |
| ; ALL-NEXT: mov v2.b[6], w14 |
| ; ALL-NEXT: udiv w16, w17, w16 |
| ; ALL-NEXT: umov w17, v0.b[9] |
| ; ALL-NEXT: mov v2.b[7], w15 |
| ; ALL-NEXT: udiv w8, w17, w9 |
| ; ALL-NEXT: umov w9, v1.b[10] |
| ; ALL-NEXT: mov v2.b[8], w16 |
| ; ALL-NEXT: udiv w9, w10, w9 |
| ; ALL-NEXT: umov w10, v1.b[11] |
| ; ALL-NEXT: mov v2.b[9], w8 |
| ; ALL-NEXT: udiv w10, w11, w10 |
| ; ALL-NEXT: umov w11, v1.b[12] |
| ; ALL-NEXT: mov v2.b[10], w9 |
| ; ALL-NEXT: umov w9, v1.b[14] |
| ; ALL-NEXT: udiv w11, w12, w11 |
| ; ALL-NEXT: umov w12, v1.b[13] |
| ; ALL-NEXT: mov v2.b[11], w10 |
| ; ALL-NEXT: umov w10, v1.b[15] |
| ; ALL-NEXT: udiv w8, w13, w12 |
| ; ALL-NEXT: umov w12, v0.b[14] |
| ; ALL-NEXT: mov v2.b[12], w11 |
| ; ALL-NEXT: umov w11, v0.b[15] |
| ; ALL-NEXT: udiv w9, w12, w9 |
| ; ALL-NEXT: mov v2.b[13], w8 |
| ; ALL-NEXT: udiv w8, w11, w10 |
| ; ALL-NEXT: mov v2.b[14], w9 |
| ; ALL-NEXT: mov v2.b[15], w8 |
| ; ALL-NEXT: mls v0.16b, v2.16b, v1.16b |
| ; ALL-NEXT: str q2, [x0] |
| ; ALL-NEXT: ret |
| %div = udiv <16 x i8> %x, %y |
| store <16 x i8> %div, <16 x i8>* %divdst, align 16 |
| %t1 = mul <16 x i8> %div, %y |
| %t2 = sub <16 x i8> %x, %t1 |
| ret <16 x i8> %t2 |
| } |
| |
| define <8 x i16> @vector_i128_i16(<8 x i16> %x, <8 x i16> %y, <8 x i16>* %divdst) nounwind { |
| ; ALL-LABEL: vector_i128_i16: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: umov w8, v1.h[1] |
| ; ALL-NEXT: umov w9, v0.h[1] |
| ; ALL-NEXT: umov w10, v0.h[0] |
| ; ALL-NEXT: umov w11, v0.h[2] |
| ; ALL-NEXT: umov w12, v0.h[3] |
| ; ALL-NEXT: umov w13, v0.h[4] |
| ; ALL-NEXT: udiv w8, w9, w8 |
| ; ALL-NEXT: umov w9, v1.h[0] |
| ; ALL-NEXT: udiv w9, w10, w9 |
| ; ALL-NEXT: umov w10, v1.h[2] |
| ; ALL-NEXT: udiv w10, w11, w10 |
| ; ALL-NEXT: umov w11, v1.h[3] |
| ; ALL-NEXT: fmov s2, w9 |
| ; ALL-NEXT: umov w9, v1.h[5] |
| ; ALL-NEXT: mov v2.h[1], w8 |
| ; ALL-NEXT: udiv w11, w12, w11 |
| ; ALL-NEXT: umov w12, v1.h[4] |
| ; ALL-NEXT: mov v2.h[2], w10 |
| ; ALL-NEXT: umov w10, v0.h[6] |
| ; ALL-NEXT: udiv w12, w13, w12 |
| ; ALL-NEXT: umov w13, v0.h[5] |
| ; ALL-NEXT: mov v2.h[3], w11 |
| ; ALL-NEXT: umov w11, v0.h[7] |
| ; ALL-NEXT: udiv w8, w13, w9 |
| ; ALL-NEXT: umov w9, v1.h[6] |
| ; ALL-NEXT: mov v2.h[4], w12 |
| ; ALL-NEXT: udiv w9, w10, w9 |
| ; ALL-NEXT: umov w10, v1.h[7] |
| ; ALL-NEXT: mov v2.h[5], w8 |
| ; ALL-NEXT: udiv w8, w11, w10 |
| ; ALL-NEXT: mov v2.h[6], w9 |
| ; ALL-NEXT: mov v2.h[7], w8 |
| ; ALL-NEXT: mls v0.8h, v2.8h, v1.8h |
| ; ALL-NEXT: str q2, [x0] |
| ; ALL-NEXT: ret |
| %div = udiv <8 x i16> %x, %y |
| store <8 x i16> %div, <8 x i16>* %divdst, align 16 |
| %t1 = mul <8 x i16> %div, %y |
| %t2 = sub <8 x i16> %x, %t1 |
| ret <8 x i16> %t2 |
| } |
| |
| define <4 x i32> @vector_i128_i32(<4 x i32> %x, <4 x i32> %y, <4 x i32>* %divdst) nounwind { |
| ; ALL-LABEL: vector_i128_i32: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: mov w8, v1.s[1] |
| ; ALL-NEXT: mov w9, v0.s[1] |
| ; ALL-NEXT: fmov w10, s0 |
| ; ALL-NEXT: mov w11, v0.s[2] |
| ; ALL-NEXT: mov w12, v0.s[3] |
| ; ALL-NEXT: udiv w8, w9, w8 |
| ; ALL-NEXT: fmov w9, s1 |
| ; ALL-NEXT: udiv w9, w10, w9 |
| ; ALL-NEXT: mov w10, v1.s[2] |
| ; ALL-NEXT: udiv w10, w11, w10 |
| ; ALL-NEXT: mov w11, v1.s[3] |
| ; ALL-NEXT: fmov s2, w9 |
| ; ALL-NEXT: mov v2.s[1], w8 |
| ; ALL-NEXT: udiv w8, w12, w11 |
| ; ALL-NEXT: mov v2.s[2], w10 |
| ; ALL-NEXT: mov v2.s[3], w8 |
| ; ALL-NEXT: mls v0.4s, v2.4s, v1.4s |
| ; ALL-NEXT: str q2, [x0] |
| ; ALL-NEXT: ret |
| %div = udiv <4 x i32> %x, %y |
| store <4 x i32> %div, <4 x i32>* %divdst, align 16 |
| %t1 = mul <4 x i32> %div, %y |
| %t2 = sub <4 x i32> %x, %t1 |
| ret <4 x i32> %t2 |
| } |
| |
| define <2 x i64> @vector_i128_i64(<2 x i64> %x, <2 x i64> %y, <2 x i64>* %divdst) nounwind { |
| ; ALL-LABEL: vector_i128_i64: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: fmov x8, d1 |
| ; ALL-NEXT: fmov x9, d0 |
| ; ALL-NEXT: mov x10, v1.d[1] |
| ; ALL-NEXT: mov x11, v0.d[1] |
| ; ALL-NEXT: udiv x9, x9, x8 |
| ; ALL-NEXT: mul x8, x9, x8 |
| ; ALL-NEXT: udiv x11, x11, x10 |
| ; ALL-NEXT: fmov d1, x8 |
| ; ALL-NEXT: mul x10, x11, x10 |
| ; ALL-NEXT: mov v1.d[1], x10 |
| ; ALL-NEXT: sub v0.2d, v0.2d, v1.2d |
| ; ALL-NEXT: fmov d1, x9 |
| ; ALL-NEXT: mov v1.d[1], x11 |
| ; ALL-NEXT: str q1, [x0] |
| ; ALL-NEXT: ret |
| %div = udiv <2 x i64> %x, %y |
| store <2 x i64> %div, <2 x i64>* %divdst, align 16 |
| %t1 = mul <2 x i64> %div, %y |
| %t2 = sub <2 x i64> %x, %t1 |
| ret <2 x i64> %t2 |
| } |
| |
| ; Special tests. |
| |
| define i32 @scalar_i32_commutative(i32 %x, i32* %ysrc, i32* %divdst) nounwind { |
| ; ALL-LABEL: scalar_i32_commutative: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: ldr w8, [x1] |
| ; ALL-NEXT: udiv w9, w0, w8 |
| ; ALL-NEXT: msub w0, w8, w9, w0 |
| ; ALL-NEXT: str w9, [x2] |
| ; ALL-NEXT: ret |
| %y = load i32, i32* %ysrc, align 4 |
| %div = udiv i32 %x, %y |
| store i32 %div, i32* %divdst, align 4 |
| %t1 = mul i32 %y, %div ; commutative |
| %t2 = sub i32 %x, %t1 |
| ret i32 %t2 |
| } |
| |
| ; We do not care about extra uses. |
| define i32 @extrause(i32 %x, i32 %y, i32* %divdst, i32* %t1dst) nounwind { |
| ; ALL-LABEL: extrause: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: udiv w8, w0, w1 |
| ; ALL-NEXT: mul w9, w8, w1 |
| ; ALL-NEXT: str w8, [x2] |
| ; ALL-NEXT: sub w0, w0, w9 |
| ; ALL-NEXT: str w9, [x3] |
| ; ALL-NEXT: ret |
| %div = udiv i32 %x, %y |
| store i32 %div, i32* %divdst, align 4 |
| %t1 = mul i32 %div, %y |
| store i32 %t1, i32* %t1dst, align 4 |
| %t2 = sub i32 %x, %t1 |
| ret i32 %t2 |
| } |
| |
| ; 'rem' should appear next to 'div'. |
| define i32 @multiple_bb(i32 %x, i32 %y, i32* %divdst, i1 zeroext %store_urem, i32* %uremdst) nounwind { |
| ; ALL-LABEL: multiple_bb: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: mov w8, w0 |
| ; ALL-NEXT: udiv w0, w0, w1 |
| ; ALL-NEXT: str w0, [x2] |
| ; ALL-NEXT: cbz w3, .LBB10_2 |
| ; ALL-NEXT: // %bb.1: // %do_urem |
| ; ALL-NEXT: msub w8, w0, w1, w8 |
| ; ALL-NEXT: str w8, [x4] |
| ; ALL-NEXT: .LBB10_2: // %end |
| ; ALL-NEXT: ret |
| %div = udiv i32 %x, %y |
| store i32 %div, i32* %divdst, align 4 |
| br i1 %store_urem, label %do_urem, label %end |
| do_urem: |
| %t1 = mul i32 %div, %y |
| %t2 = sub i32 %x, %t1 |
| store i32 %t2, i32* %uremdst, align 4 |
| br label %end |
| end: |
| ret i32 %div |
| } |
| |
| define i32 @negative_different_x(i32 %x0, i32 %x1, i32 %y, i32* %divdst) nounwind { |
| ; ALL-LABEL: negative_different_x: |
| ; ALL: // %bb.0: |
| ; ALL-NEXT: udiv w8, w0, w2 |
| ; ALL-NEXT: msub w0, w8, w2, w1 |
| ; ALL-NEXT: str w8, [x3] |
| ; ALL-NEXT: ret |
| %div = udiv i32 %x0, %y ; not %x1 |
| store i32 %div, i32* %divdst, align 4 |
| %t1 = mul i32 %div, %y |
| %t2 = sub i32 %x1, %t1 ; not %x0 |
| ret i32 %t2 |
| } |
