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Add reduce_add() for int8 and int16 types.

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This maps to specialized instructions (e.g. PSADBW) when available.
This commit is contained in:
Matt Pharr
2013-07-25 09:11:39 -07:00
parent 2d063925a1
commit b6df447b55
24 changed files with 464 additions and 44 deletions
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27
builtins/target-sse4-8.ll
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@@ -261,6 +261,33 @@ define i1 @__none(<16 x i8>) nounwind readnone alwaysinline {
ret i1 %meq
}
declare <2 x i64> @llvm.x86.sse2.psad.bw(<16 x i8>, <16 x i8>) nounwind readnone
define i16 @__reduce_add_int8(<16 x i8>) nounwind readnone alwaysinline {
%rv = call <2 x i64> @llvm.x86.sse2.psad.bw(<16 x i8> %0,
<16 x i8> zeroinitializer)
%r0 = extractelement <2 x i64> %rv, i32 0
%r1 = extractelement <2 x i64> %rv, i32 1
%r = add i64 %r0, %r1
%r16 = trunc i64 %r to i16
ret i16 %r16
}
define internal <16 x i16> @__add_varying_i16(<16 x i16>,
<16 x i16>) nounwind readnone alwaysinline {
%r = add <16 x i16> %0, %1
ret <16 x i16> %r
}
define internal i16 @__add_uniform_i16(i16, i16) nounwind readnone alwaysinline {
%r = add i16 %0, %1
ret i16 %r
}
define i16 @__reduce_add_int16(<16 x i16>) nounwind readnone alwaysinline {
reduce16(i16, @__add_varying_i16, @__add_uniform_i16)
}
define internal <16 x float> @__add_varying_float(<16 x float>, <16 x float>) {
%r = fadd <16 x float> %0, %1
ret <16 x float> %r