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clang-p2996/llvm/test/CodeGen/RISCV/div.ll
Philip Reames 86eff6be68 [MachineCombiner] Use default latency model when no detailed model available 
This change adjusts the cost modeling used when the target does not have a schedule model with individual instruction latencies. After this change, we use the default latency information available from TargetSchedule. The default latency information essentially ends up treating most instructions as latency 1, with a few "expensive" ones getting a higher cost.

Previously, we unconditionally applied the first legal pattern - without any consideration of profitability. As a result, this change both prevents some patterns being applied, and changes which patterns are exercised. (i.e. previously the first pattern was applied, afterwards, maybe the second one is because the first wasn't profitable.)

The motivation here is two fold.

First, this brings the default behavior in line with the behavior when -mcpu or -mtune is specified. This improves test coverage, and generally makes it less likely we will have bad surprises when providing more information to the compiler.

Second, this enables some reassociation for ILP by default. Despite being unconditionally enabled, the prior code tended to "reassociate" repeatedly through an entire chain and simply moving the first operand to the end. The result was still a serial chain, just a different one. With this change, one of the intermediate transforms is unprofitable and we end up with a partially flattened tree.

Note that the resulting code diffs show significant room for improvement in the basic algorithm. I am intentionally excluding those from this patch.

For the test diffs, I don't seen any concerning regressions. I took a fairly close look at the RISCV ones, but only skimmed the x86 (particularly vector x86) changes.

Differential Revision: https://reviews.llvm.org/D141017
2023-01-20 09:28:20 -08:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV32I %s
; RUN: llc -mtriple=riscv32 -mattr=+m -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV32IM %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV64I %s
; RUN: llc -mtriple=riscv64 -mattr=+m -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=RV64IM %s
define i32 @udiv(i32 %a, i32 %b) nounwind {
; RV32I-LABEL: udiv:
; RV32I: # %bb.0:
; RV32I-NEXT: tail __udivsi3@plt
;
; RV32IM-LABEL: udiv:
; RV32IM: # %bb.0:
; RV32IM-NEXT: divu a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 32
; RV64I-NEXT: srli a0, a0, 32
; RV64I-NEXT: slli a1, a1, 32
; RV64I-NEXT: srli a1, a1, 32
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv:
; RV64IM: # %bb.0:
; RV64IM-NEXT: divuw a0, a0, a1
; RV64IM-NEXT: ret
%1 = udiv i32 %a, %b
ret i32 %1
}
define i32 @udiv_constant(i32 %a) nounwind {
; RV32I-LABEL: udiv_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: li a1, 5
; RV32I-NEXT: tail __udivsi3@plt
;
; RV32IM-LABEL: udiv_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: lui a1, 838861
; RV32IM-NEXT: addi a1, a1, -819
; RV32IM-NEXT: mulhu a0, a0, a1
; RV32IM-NEXT: srli a0, a0, 2
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 32
; RV64I-NEXT: srli a0, a0, 32
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 32
; RV64IM-NEXT: lui a1, 838861
; RV64IM-NEXT: addiw a1, a1, -819
; RV64IM-NEXT: slli a1, a1, 32
; RV64IM-NEXT: mulhu a0, a0, a1
; RV64IM-NEXT: srli a0, a0, 34
; RV64IM-NEXT: ret
%1 = udiv i32 %a, 5
ret i32 %1
}
define i32 @udiv_pow2(i32 %a) nounwind {
; RV32I-LABEL: udiv_pow2:
; RV32I: # %bb.0:
; RV32I-NEXT: srli a0, a0, 3
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv_pow2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: srli a0, a0, 3
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv_pow2:
; RV64I: # %bb.0:
; RV64I-NEXT: srliw a0, a0, 3
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv_pow2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: srliw a0, a0, 3
; RV64IM-NEXT: ret
%1 = udiv i32 %a, 8
ret i32 %1
}
define i32 @udiv_constant_lhs(i32 %a) nounwind {
; RV32I-LABEL: udiv_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: mv a1, a0
; RV32I-NEXT: li a0, 10
; RV32I-NEXT: tail __udivsi3@plt
;
; RV32IM-LABEL: udiv_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: li a1, 10
; RV32IM-NEXT: divu a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 32
; RV64I-NEXT: srli a1, a0, 32
; RV64I-NEXT: li a0, 10
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: li a1, 10
; RV64IM-NEXT: divuw a0, a1, a0
; RV64IM-NEXT: ret
%1 = udiv i32 10, %a
ret i32 %1
}
define i64 @udiv64(i64 %a, i64 %b) nounwind {
; RV32I-LABEL: udiv64:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: call __udivdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv64:
; RV32IM: # %bb.0:
; RV32IM-NEXT: addi sp, sp, -16
; RV32IM-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32IM-NEXT: call __udivdi3@plt
; RV32IM-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32IM-NEXT: addi sp, sp, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv64:
; RV64I: # %bb.0:
; RV64I-NEXT: tail __udivdi3@plt
;
; RV64IM-LABEL: udiv64:
; RV64IM: # %bb.0:
; RV64IM-NEXT: divu a0, a0, a1
; RV64IM-NEXT: ret
%1 = udiv i64 %a, %b
ret i64 %1
}
define i64 @udiv64_constant(i64 %a) nounwind {
; RV32I-LABEL: udiv64_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: li a2, 5
; RV32I-NEXT: li a3, 0
; RV32I-NEXT: call __udivdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv64_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: add a2, a0, a1
; RV32IM-NEXT: sltu a3, a2, a0
; RV32IM-NEXT: add a2, a2, a3
; RV32IM-NEXT: lui a3, 838861
; RV32IM-NEXT: addi a4, a3, -819
; RV32IM-NEXT: mulhu a5, a2, a4
; RV32IM-NEXT: srli a6, a5, 2
; RV32IM-NEXT: andi a5, a5, -4
; RV32IM-NEXT: add a5, a5, a6
; RV32IM-NEXT: sub a2, a2, a5
; RV32IM-NEXT: sub a5, a0, a2
; RV32IM-NEXT: addi a3, a3, -820
; RV32IM-NEXT: mul a3, a5, a3
; RV32IM-NEXT: mulhu a6, a5, a4
; RV32IM-NEXT: add a3, a6, a3
; RV32IM-NEXT: sltu a0, a0, a2
; RV32IM-NEXT: sub a1, a1, a0
; RV32IM-NEXT: mul a1, a1, a4
; RV32IM-NEXT: add a1, a3, a1
; RV32IM-NEXT: mul a0, a5, a4
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv64_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: tail __udivdi3@plt
;
; RV64IM-LABEL: udiv64_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: lui a1, %hi(.LCPI5_0)
; RV64IM-NEXT: ld a1, %lo(.LCPI5_0)(a1)
; RV64IM-NEXT: mulhu a0, a0, a1
; RV64IM-NEXT: srli a0, a0, 2
; RV64IM-NEXT: ret
%1 = udiv i64 %a, 5
ret i64 %1
}
define i64 @udiv64_constant_lhs(i64 %a) nounwind {
; RV32I-LABEL: udiv64_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: mv a3, a1
; RV32I-NEXT: mv a2, a0
; RV32I-NEXT: li a0, 10
; RV32I-NEXT: li a1, 0
; RV32I-NEXT: call __udivdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv64_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: addi sp, sp, -16
; RV32IM-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32IM-NEXT: mv a3, a1
; RV32IM-NEXT: mv a2, a0
; RV32IM-NEXT: li a0, 10
; RV32IM-NEXT: li a1, 0
; RV32IM-NEXT: call __udivdi3@plt
; RV32IM-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32IM-NEXT: addi sp, sp, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv64_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: mv a1, a0
; RV64I-NEXT: li a0, 10
; RV64I-NEXT: tail __udivdi3@plt
;
; RV64IM-LABEL: udiv64_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: li a1, 10
; RV64IM-NEXT: divu a0, a1, a0
; RV64IM-NEXT: ret
%1 = udiv i64 10, %a
ret i64 %1
}
define i8 @udiv8(i8 %a, i8 %b) nounwind {
; RV32I-LABEL: udiv8:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: andi a0, a0, 255
; RV32I-NEXT: andi a1, a1, 255
; RV32I-NEXT: call __udivsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv8:
; RV32IM: # %bb.0:
; RV32IM-NEXT: andi a1, a1, 255
; RV32IM-NEXT: andi a0, a0, 255
; RV32IM-NEXT: divu a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv8:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: andi a0, a0, 255
; RV64I-NEXT: andi a1, a1, 255
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv8:
; RV64IM: # %bb.0:
; RV64IM-NEXT: andi a1, a1, 255
; RV64IM-NEXT: andi a0, a0, 255
; RV64IM-NEXT: divuw a0, a0, a1
; RV64IM-NEXT: ret
%1 = udiv i8 %a, %b
ret i8 %1
}
define i8 @udiv8_constant(i8 %a) nounwind {
; RV32I-LABEL: udiv8_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: andi a0, a0, 255
; RV32I-NEXT: li a1, 5
; RV32I-NEXT: call __udivsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv8_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: andi a0, a0, 255
; RV32IM-NEXT: li a1, 205
; RV32IM-NEXT: mul a0, a0, a1
; RV32IM-NEXT: srli a0, a0, 10
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv8_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: andi a0, a0, 255
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv8_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: andi a0, a0, 255
; RV64IM-NEXT: li a1, 205
; RV64IM-NEXT: mul a0, a0, a1
; RV64IM-NEXT: srli a0, a0, 10
; RV64IM-NEXT: ret
%1 = udiv i8 %a, 5
ret i8 %1
}
define i8 @udiv8_pow2(i8 %a) nounwind {
; RV32I-LABEL: udiv8_pow2:
; RV32I: # %bb.0:
; RV32I-NEXT: slli a0, a0, 24
; RV32I-NEXT: srli a0, a0, 27
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv8_pow2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 24
; RV32IM-NEXT: srli a0, a0, 27
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv8_pow2:
; RV64I: # %bb.0:
; RV64I-NEXT: slli a0, a0, 56
; RV64I-NEXT: srli a0, a0, 59
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv8_pow2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 56
; RV64IM-NEXT: srli a0, a0, 59
; RV64IM-NEXT: ret
%1 = udiv i8 %a, 8
ret i8 %1
}
define i8 @udiv8_constant_lhs(i8 %a) nounwind {
; RV32I-LABEL: udiv8_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: andi a1, a0, 255
; RV32I-NEXT: li a0, 10
; RV32I-NEXT: call __udivsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv8_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: andi a0, a0, 255
; RV32IM-NEXT: li a1, 10
; RV32IM-NEXT: divu a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv8_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: andi a1, a0, 255
; RV64I-NEXT: li a0, 10
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv8_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: andi a0, a0, 255
; RV64IM-NEXT: li a1, 10
; RV64IM-NEXT: divuw a0, a1, a0
; RV64IM-NEXT: ret
%1 = udiv i8 10, %a
ret i8 %1
}
define i16 @udiv16(i16 %a, i16 %b) nounwind {
; RV32I-LABEL: udiv16:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: lui a2, 16
; RV32I-NEXT: addi a2, a2, -1
; RV32I-NEXT: and a0, a0, a2
; RV32I-NEXT: and a1, a1, a2
; RV32I-NEXT: call __udivsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv16:
; RV32IM: # %bb.0:
; RV32IM-NEXT: lui a2, 16
; RV32IM-NEXT: addi a2, a2, -1
; RV32IM-NEXT: and a1, a1, a2
; RV32IM-NEXT: and a0, a0, a2
; RV32IM-NEXT: divu a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv16:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: lui a2, 16
; RV64I-NEXT: addiw a2, a2, -1
; RV64I-NEXT: and a0, a0, a2
; RV64I-NEXT: and a1, a1, a2
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv16:
; RV64IM: # %bb.0:
; RV64IM-NEXT: lui a2, 16
; RV64IM-NEXT: addiw a2, a2, -1
; RV64IM-NEXT: and a1, a1, a2
; RV64IM-NEXT: and a0, a0, a2
; RV64IM-NEXT: divuw a0, a0, a1
; RV64IM-NEXT: ret
%1 = udiv i16 %a, %b
ret i16 %1
}
define i16 @udiv16_constant(i16 %a) nounwind {
; RV32I-LABEL: udiv16_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srli a0, a0, 16
; RV32I-NEXT: li a1, 5
; RV32I-NEXT: call __udivsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv16_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: lui a1, 838864
; RV32IM-NEXT: mulhu a0, a0, a1
; RV32IM-NEXT: srli a0, a0, 18
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv16_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srli a0, a0, 48
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv16_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: lui a1, 52429
; RV64IM-NEXT: slli a1, a1, 4
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: mulhu a0, a0, a1
; RV64IM-NEXT: srli a0, a0, 18
; RV64IM-NEXT: ret
%1 = udiv i16 %a, 5
ret i16 %1
}
define i16 @udiv16_pow2(i16 %a) nounwind {
; RV32I-LABEL: udiv16_pow2:
; RV32I: # %bb.0:
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srli a0, a0, 19
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv16_pow2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srli a0, a0, 19
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv16_pow2:
; RV64I: # %bb.0:
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srli a0, a0, 51
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv16_pow2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srli a0, a0, 51
; RV64IM-NEXT: ret
%1 = udiv i16 %a, 8
ret i16 %1
}
define i16 @udiv16_constant_lhs(i16 %a) nounwind {
; RV32I-LABEL: udiv16_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srli a1, a0, 16
; RV32I-NEXT: li a0, 10
; RV32I-NEXT: call __udivsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: udiv16_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srli a0, a0, 16
; RV32IM-NEXT: li a1, 10
; RV32IM-NEXT: divu a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: udiv16_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srli a1, a0, 48
; RV64I-NEXT: li a0, 10
; RV64I-NEXT: call __udivdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: udiv16_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srli a0, a0, 48
; RV64IM-NEXT: li a1, 10
; RV64IM-NEXT: divuw a0, a1, a0
; RV64IM-NEXT: ret
%1 = udiv i16 10, %a
ret i16 %1
}
define i32 @sdiv(i32 %a, i32 %b) nounwind {
; RV32I-LABEL: sdiv:
; RV32I: # %bb.0:
; RV32I-NEXT: tail __divsi3@plt
;
; RV32IM-LABEL: sdiv:
; RV32IM: # %bb.0:
; RV32IM-NEXT: div a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: sext.w a0, a0
; RV64I-NEXT: sext.w a1, a1
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv:
; RV64IM: # %bb.0:
; RV64IM-NEXT: divw a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i32 %a, %b
ret i32 %1
}
define i32 @sdiv_constant(i32 %a) nounwind {
; RV32I-LABEL: sdiv_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: li a1, 5
; RV32I-NEXT: tail __divsi3@plt
;
; RV32IM-LABEL: sdiv_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: lui a1, 419430
; RV32IM-NEXT: addi a1, a1, 1639
; RV32IM-NEXT: mulh a0, a0, a1
; RV32IM-NEXT: srli a1, a0, 31
; RV32IM-NEXT: srai a0, a0, 1
; RV32IM-NEXT: add a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: sext.w a0, a0
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: sext.w a0, a0
; RV64IM-NEXT: lui a1, 419430
; RV64IM-NEXT: addiw a1, a1, 1639
; RV64IM-NEXT: mul a0, a0, a1
; RV64IM-NEXT: srli a1, a0, 63
; RV64IM-NEXT: srai a0, a0, 33
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i32 %a, 5
ret i32 %1
}
define i32 @sdiv_pow2(i32 %a) nounwind {
; RV32I-LABEL: sdiv_pow2:
; RV32I: # %bb.0:
; RV32I-NEXT: srai a1, a0, 31
; RV32I-NEXT: srli a1, a1, 29
; RV32I-NEXT: add a0, a0, a1
; RV32I-NEXT: srai a0, a0, 3
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv_pow2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: srai a1, a0, 31
; RV32IM-NEXT: srli a1, a1, 29
; RV32IM-NEXT: add a0, a0, a1
; RV32IM-NEXT: srai a0, a0, 3
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv_pow2:
; RV64I: # %bb.0:
; RV64I-NEXT: sraiw a1, a0, 31
; RV64I-NEXT: srliw a1, a1, 29
; RV64I-NEXT: add a0, a0, a1
; RV64I-NEXT: sraiw a0, a0, 3
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv_pow2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: sraiw a1, a0, 31
; RV64IM-NEXT: srliw a1, a1, 29
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: sraiw a0, a0, 3
; RV64IM-NEXT: ret
%1 = sdiv i32 %a, 8
ret i32 %1
}
define i32 @sdiv_pow2_2(i32 %a) nounwind {
; RV32I-LABEL: sdiv_pow2_2:
; RV32I: # %bb.0:
; RV32I-NEXT: srai a1, a0, 31
; RV32I-NEXT: srli a1, a1, 16
; RV32I-NEXT: add a0, a0, a1
; RV32I-NEXT: srai a0, a0, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv_pow2_2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: srai a1, a0, 31
; RV32IM-NEXT: srli a1, a1, 16
; RV32IM-NEXT: add a0, a0, a1
; RV32IM-NEXT: srai a0, a0, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv_pow2_2:
; RV64I: # %bb.0:
; RV64I-NEXT: sraiw a1, a0, 31
; RV64I-NEXT: srliw a1, a1, 16
; RV64I-NEXT: add a0, a0, a1
; RV64I-NEXT: sraiw a0, a0, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv_pow2_2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: sraiw a1, a0, 31
; RV64IM-NEXT: srliw a1, a1, 16
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: sraiw a0, a0, 16
; RV64IM-NEXT: ret
%1 = sdiv i32 %a, 65536
ret i32 %1
}
define i32 @sdiv_constant_lhs(i32 %a) nounwind {
; RV32I-LABEL: sdiv_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: mv a1, a0
; RV32I-NEXT: li a0, -10
; RV32I-NEXT: tail __divsi3@plt
;
; RV32IM-LABEL: sdiv_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: li a1, -10
; RV32IM-NEXT: div a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: sext.w a1, a0
; RV64I-NEXT: li a0, -10
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: li a1, -10
; RV64IM-NEXT: divw a0, a1, a0
; RV64IM-NEXT: ret
%1 = sdiv i32 -10, %a
ret i32 %1
}
define i64 @sdiv64(i64 %a, i64 %b) nounwind {
; RV32I-LABEL: sdiv64:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: call __divdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv64:
; RV32IM: # %bb.0:
; RV32IM-NEXT: addi sp, sp, -16
; RV32IM-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32IM-NEXT: call __divdi3@plt
; RV32IM-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32IM-NEXT: addi sp, sp, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv64:
; RV64I: # %bb.0:
; RV64I-NEXT: tail __divdi3@plt
;
; RV64IM-LABEL: sdiv64:
; RV64IM: # %bb.0:
; RV64IM-NEXT: div a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i64 %a, %b
ret i64 %1
}
define i64 @sdiv64_constant(i64 %a) nounwind {
; RV32I-LABEL: sdiv64_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: li a2, 5
; RV32I-NEXT: li a3, 0
; RV32I-NEXT: call __divdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv64_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: addi sp, sp, -16
; RV32IM-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32IM-NEXT: li a2, 5
; RV32IM-NEXT: li a3, 0
; RV32IM-NEXT: call __divdi3@plt
; RV32IM-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32IM-NEXT: addi sp, sp, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv64_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: tail __divdi3@plt
;
; RV64IM-LABEL: sdiv64_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: lui a1, %hi(.LCPI21_0)
; RV64IM-NEXT: ld a1, %lo(.LCPI21_0)(a1)
; RV64IM-NEXT: mulh a0, a0, a1
; RV64IM-NEXT: srli a1, a0, 63
; RV64IM-NEXT: srai a0, a0, 1
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i64 %a, 5
ret i64 %1
}
define i64 @sdiv64_constant_lhs(i64 %a) nounwind {
; RV32I-LABEL: sdiv64_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: mv a3, a1
; RV32I-NEXT: mv a2, a0
; RV32I-NEXT: li a0, 10
; RV32I-NEXT: li a1, 0
; RV32I-NEXT: call __divdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv64_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: addi sp, sp, -16
; RV32IM-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32IM-NEXT: mv a3, a1
; RV32IM-NEXT: mv a2, a0
; RV32IM-NEXT: li a0, 10
; RV32IM-NEXT: li a1, 0
; RV32IM-NEXT: call __divdi3@plt
; RV32IM-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32IM-NEXT: addi sp, sp, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv64_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: mv a1, a0
; RV64I-NEXT: li a0, 10
; RV64I-NEXT: tail __divdi3@plt
;
; RV64IM-LABEL: sdiv64_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: li a1, 10
; RV64IM-NEXT: div a0, a1, a0
; RV64IM-NEXT: ret
%1 = sdiv i64 10, %a
ret i64 %1
}
; Although this sdiv has two sexti32 operands, it shouldn't compile to divw on
; RV64M as that wouldn't produce the correct result for e.g. INT_MIN/-1.
define i64 @sdiv64_sext_operands(i32 %a, i32 %b) nounwind {
; RV32I-LABEL: sdiv64_sext_operands:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: mv a2, a1
; RV32I-NEXT: srai a1, a0, 31
; RV32I-NEXT: srai a3, a2, 31
; RV32I-NEXT: call __divdi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv64_sext_operands:
; RV32IM: # %bb.0:
; RV32IM-NEXT: addi sp, sp, -16
; RV32IM-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32IM-NEXT: mv a2, a1
; RV32IM-NEXT: srai a1, a0, 31
; RV32IM-NEXT: srai a3, a2, 31
; RV32IM-NEXT: call __divdi3@plt
; RV32IM-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32IM-NEXT: addi sp, sp, 16
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv64_sext_operands:
; RV64I: # %bb.0:
; RV64I-NEXT: sext.w a0, a0
; RV64I-NEXT: sext.w a1, a1
; RV64I-NEXT: tail __divdi3@plt
;
; RV64IM-LABEL: sdiv64_sext_operands:
; RV64IM: # %bb.0:
; RV64IM-NEXT: sext.w a0, a0
; RV64IM-NEXT: sext.w a1, a1
; RV64IM-NEXT: div a0, a0, a1
; RV64IM-NEXT: ret
%1 = sext i32 %a to i64
%2 = sext i32 %b to i64
%3 = sdiv i64 %1, %2
ret i64 %3
}
define i8 @sdiv8(i8 %a, i8 %b) nounwind {
; RV32I-LABEL: sdiv8:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 24
; RV32I-NEXT: srai a0, a0, 24
; RV32I-NEXT: slli a1, a1, 24
; RV32I-NEXT: srai a1, a1, 24
; RV32I-NEXT: call __divsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv8:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a1, a1, 24
; RV32IM-NEXT: srai a1, a1, 24
; RV32IM-NEXT: slli a0, a0, 24
; RV32IM-NEXT: srai a0, a0, 24
; RV32IM-NEXT: div a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv8:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 56
; RV64I-NEXT: srai a0, a0, 56
; RV64I-NEXT: slli a1, a1, 56
; RV64I-NEXT: srai a1, a1, 56
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv8:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a1, a1, 56
; RV64IM-NEXT: srai a1, a1, 56
; RV64IM-NEXT: slli a0, a0, 56
; RV64IM-NEXT: srai a0, a0, 56
; RV64IM-NEXT: divw a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i8 %a, %b
ret i8 %1
}
define i8 @sdiv8_constant(i8 %a) nounwind {
; RV32I-LABEL: sdiv8_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 24
; RV32I-NEXT: srai a0, a0, 24
; RV32I-NEXT: li a1, 5
; RV32I-NEXT: call __divsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv8_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 24
; RV32IM-NEXT: srai a0, a0, 24
; RV32IM-NEXT: li a1, 103
; RV32IM-NEXT: mul a0, a0, a1
; RV32IM-NEXT: srai a1, a0, 9
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srli a0, a0, 31
; RV32IM-NEXT: add a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv8_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 56
; RV64I-NEXT: srai a0, a0, 56
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv8_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 56
; RV64IM-NEXT: srai a0, a0, 56
; RV64IM-NEXT: li a1, 103
; RV64IM-NEXT: mul a0, a0, a1
; RV64IM-NEXT: srai a1, a0, 9
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srli a0, a0, 63
; RV64IM-NEXT: add a0, a1, a0
; RV64IM-NEXT: ret
%1 = sdiv i8 %a, 5
ret i8 %1
}
define i8 @sdiv8_pow2(i8 %a) nounwind {
; RV32I-LABEL: sdiv8_pow2:
; RV32I: # %bb.0:
; RV32I-NEXT: slli a1, a0, 24
; RV32I-NEXT: srai a1, a1, 24
; RV32I-NEXT: slli a1, a1, 17
; RV32I-NEXT: srli a1, a1, 29
; RV32I-NEXT: add a0, a0, a1
; RV32I-NEXT: slli a0, a0, 24
; RV32I-NEXT: srai a0, a0, 27
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv8_pow2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a1, a0, 24
; RV32IM-NEXT: srai a1, a1, 24
; RV32IM-NEXT: slli a1, a1, 17
; RV32IM-NEXT: srli a1, a1, 29
; RV32IM-NEXT: add a0, a0, a1
; RV32IM-NEXT: slli a0, a0, 24
; RV32IM-NEXT: srai a0, a0, 27
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv8_pow2:
; RV64I: # %bb.0:
; RV64I-NEXT: slli a1, a0, 56
; RV64I-NEXT: srai a1, a1, 56
; RV64I-NEXT: slli a1, a1, 49
; RV64I-NEXT: srli a1, a1, 61
; RV64I-NEXT: add a0, a0, a1
; RV64I-NEXT: slli a0, a0, 56
; RV64I-NEXT: srai a0, a0, 59
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv8_pow2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a1, a0, 56
; RV64IM-NEXT: srai a1, a1, 56
; RV64IM-NEXT: slli a1, a1, 49
; RV64IM-NEXT: srli a1, a1, 61
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: slli a0, a0, 56
; RV64IM-NEXT: srai a0, a0, 59
; RV64IM-NEXT: ret
%1 = sdiv i8 %a, 8
ret i8 %1
}
define i8 @sdiv8_constant_lhs(i8 %a) nounwind {
; RV32I-LABEL: sdiv8_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 24
; RV32I-NEXT: srai a1, a0, 24
; RV32I-NEXT: li a0, -10
; RV32I-NEXT: call __divsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv8_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 24
; RV32IM-NEXT: srai a0, a0, 24
; RV32IM-NEXT: li a1, -10
; RV32IM-NEXT: div a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv8_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 56
; RV64I-NEXT: srai a1, a0, 56
; RV64I-NEXT: li a0, -10
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv8_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 56
; RV64IM-NEXT: srai a0, a0, 56
; RV64IM-NEXT: li a1, -10
; RV64IM-NEXT: divw a0, a1, a0
; RV64IM-NEXT: ret
%1 = sdiv i8 -10, %a
ret i8 %1
}
define i16 @sdiv16(i16 %a, i16 %b) nounwind {
; RV32I-LABEL: sdiv16:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srai a0, a0, 16
; RV32I-NEXT: slli a1, a1, 16
; RV32I-NEXT: srai a1, a1, 16
; RV32I-NEXT: call __divsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv16:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a1, a1, 16
; RV32IM-NEXT: srai a1, a1, 16
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srai a0, a0, 16
; RV32IM-NEXT: div a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv16:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srai a0, a0, 48
; RV64I-NEXT: slli a1, a1, 48
; RV64I-NEXT: srai a1, a1, 48
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv16:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a1, a1, 48
; RV64IM-NEXT: srai a1, a1, 48
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srai a0, a0, 48
; RV64IM-NEXT: divw a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i16 %a, %b
ret i16 %1
}
define i16 @sdiv16_constant(i16 %a) nounwind {
; RV32I-LABEL: sdiv16_constant:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srai a0, a0, 16
; RV32I-NEXT: li a1, 5
; RV32I-NEXT: call __divsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv16_constant:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srai a0, a0, 16
; RV32IM-NEXT: lui a1, 6
; RV32IM-NEXT: addi a1, a1, 1639
; RV32IM-NEXT: mul a0, a0, a1
; RV32IM-NEXT: srli a1, a0, 31
; RV32IM-NEXT: srai a0, a0, 17
; RV32IM-NEXT: add a0, a0, a1
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv16_constant:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srai a0, a0, 48
; RV64I-NEXT: li a1, 5
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv16_constant:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srai a0, a0, 48
; RV64IM-NEXT: lui a1, 6
; RV64IM-NEXT: addiw a1, a1, 1639
; RV64IM-NEXT: mul a0, a0, a1
; RV64IM-NEXT: srliw a1, a0, 31
; RV64IM-NEXT: srai a0, a0, 17
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: ret
%1 = sdiv i16 %a, 5
ret i16 %1
}
define i16 @sdiv16_pow2(i16 %a) nounwind {
; RV32I-LABEL: sdiv16_pow2:
; RV32I: # %bb.0:
; RV32I-NEXT: slli a1, a0, 16
; RV32I-NEXT: srai a1, a1, 16
; RV32I-NEXT: slli a1, a1, 1
; RV32I-NEXT: srli a1, a1, 29
; RV32I-NEXT: add a0, a0, a1
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srai a0, a0, 19
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv16_pow2:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a1, a0, 16
; RV32IM-NEXT: srai a1, a1, 16
; RV32IM-NEXT: slli a1, a1, 1
; RV32IM-NEXT: srli a1, a1, 29
; RV32IM-NEXT: add a0, a0, a1
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srai a0, a0, 19
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv16_pow2:
; RV64I: # %bb.0:
; RV64I-NEXT: slli a1, a0, 48
; RV64I-NEXT: srai a1, a1, 48
; RV64I-NEXT: slli a1, a1, 33
; RV64I-NEXT: srli a1, a1, 61
; RV64I-NEXT: add a0, a0, a1
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srai a0, a0, 51
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv16_pow2:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a1, a0, 48
; RV64IM-NEXT: srai a1, a1, 48
; RV64IM-NEXT: slli a1, a1, 33
; RV64IM-NEXT: srli a1, a1, 61
; RV64IM-NEXT: add a0, a0, a1
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srai a0, a0, 51
; RV64IM-NEXT: ret
%1 = sdiv i16 %a, 8
ret i16 %1
}
define i16 @sdiv16_constant_lhs(i16 %a) nounwind {
; RV32I-LABEL: sdiv16_constant_lhs:
; RV32I: # %bb.0:
; RV32I-NEXT: addi sp, sp, -16
; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
; RV32I-NEXT: slli a0, a0, 16
; RV32I-NEXT: srai a1, a0, 16
; RV32I-NEXT: li a0, -10
; RV32I-NEXT: call __divsi3@plt
; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
; RV32I-NEXT: addi sp, sp, 16
; RV32I-NEXT: ret
;
; RV32IM-LABEL: sdiv16_constant_lhs:
; RV32IM: # %bb.0:
; RV32IM-NEXT: slli a0, a0, 16
; RV32IM-NEXT: srai a0, a0, 16
; RV32IM-NEXT: li a1, -10
; RV32IM-NEXT: div a0, a1, a0
; RV32IM-NEXT: ret
;
; RV64I-LABEL: sdiv16_constant_lhs:
; RV64I: # %bb.0:
; RV64I-NEXT: addi sp, sp, -16
; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: slli a0, a0, 48
; RV64I-NEXT: srai a1, a0, 48
; RV64I-NEXT: li a0, -10
; RV64I-NEXT: call __divdi3@plt
; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 16
; RV64I-NEXT: ret
;
; RV64IM-LABEL: sdiv16_constant_lhs:
; RV64IM: # %bb.0:
; RV64IM-NEXT: slli a0, a0, 48
; RV64IM-NEXT: srai a0, a0, 48
; RV64IM-NEXT: li a1, -10
; RV64IM-NEXT: divw a0, a1, a0
; RV64IM-NEXT: ret
%1 = sdiv i16 -10, %a
ret i16 %1
}
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