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R600: Fix trunc i64 to i32 on SI 

llvm-svn: 192375
This commit is contained in:
Matt Arsenault 2013-10-10 18:04:16 +00:00
parent d219231de5
commit 204cfa6e43
2 changed files with 17 additions and 0 deletions
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5
llvm/lib/Target/R600/SIInstructions.td
View File

@ -851,6 +851,11 @@ def : Pat <
(V_CNDMASK_B32_e64 $src0, $src1, $src2)
>;
def : Pat <
(i32 (trunc i64:$val)),
(EXTRACT_SUBREG $val, sub0)
>;
//use two V_CNDMASK_B32_e64 instructions for f64
def : Pat <
(f64 (select i1:$src2, f64:$src1, f64:$src0)),

12
llvm/test/CodeGen/R600/trunc.ll
View File

@ -17,3 +17,15 @@ define void @trunc_i64_to_i32_store(i32 addrspace(1)* %out, i64 %in) {
ret void
}
; SI-LABEL: @trunc_shl_i64:
; SI: S_LOAD_DWORDX2
; SI: S_LOAD_DWORDX2 [[SREG:SGPR[0-9]+_SGPR[0-9]+]]
; SI: V_LSHL_B64 [[LO_VREG:VGPR[0-9]+]]_VGPR{{[0-9]+}}, [[SREG]], 2
; SI-NOT: [[LO_VREG]]
; SI: BUFFER_STORE_DWORD [[LO_VREG]],
define void @trunc_shl_i64(i32 addrspace(1)* %out, i64 %a) {
%b = shl i64 %a, 2
%result = trunc i64 %b to i32
store i32 %result, i32 addrspace(1)* %out, align 4
ret void
}