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R600: Add checks for urem/srem by a constant

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Make sure this uses the faster expansion using magic constants
to avoid the full division path.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226734 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2015-01-21 22:56:15 +00:00
parent 9a43e3d47f
commit 85661f76e3
2 changed files with 29 additions and 1 deletions
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15
test/CodeGen/R600/srem.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -march=amdgcn -mcpu=SI < %s
; RUN: llc -march=amdgcn -mcpu=SI < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=r600 -mcpu=redwood < %s
define void @srem_i32(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
@ -17,6 +17,19 @@ define void @srem_i32_4(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
ret void
}
; FUNC-LABEL: {{^}}srem_i32_7:
; SI: v_mov_b32_e32 [[MAGIC:v[0-9]+]], 0x92492493
; SI: v_mul_hi_i32 {{v[0-9]+}}, [[MAGIC]],
; SI: v_mul_lo_i32
; SI: v_sub_i32
; SI: s_endpgm
define void @srem_i32_7(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
%num = load i32 addrspace(1) * %in
%result = srem i32 %num, 7
store i32 %result, i32 addrspace(1)* %out
ret void
}
define void @srem_v2i32(<2 x i32> addrspace(1)* %out, <2 x i32> addrspace(1)* %in) {
%den_ptr = getelementptr <2 x i32> addrspace(1)* %in, i32 1
%num = load <2 x i32> addrspace(1) * %in

15
test/CodeGen/R600/urem.ll
View File

@ -17,6 +17,21 @@ define void @test_urem_i32(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
ret void
}
; FUNC-LABEL: {{^}}test_urem_i32_7:
; SI: v_mov_b32_e32 [[MAGIC:v[0-9]+]], 0x24924925
; SI: v_mul_hi_u32 {{v[0-9]+}}, [[MAGIC]]
; SI: v_subrev_i32
; SI: v_mul_lo_i32
; SI: v_sub_i32
; SI: buffer_store_dword
; SI: s_endpgm
define void @test_urem_i32_7(i32 addrspace(1)* %out, i32 addrspace(1)* %in) {
%num = load i32 addrspace(1) * %in
%result = urem i32 %num, 7
store i32 %result, i32 addrspace(1)* %out
ret void
}
; FUNC-LABEL: {{^}}test_urem_v2i32:
; SI: s_endpgm
; EG: CF_END