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integer/clz: Use clang builtin instead of llvm asm 

The generated llvm IR mostly identical. char/uchar case is a bit worse.

reviewer: Tom Stellard

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 314701
This commit is contained in:
Jan Vesely 2017-10-02 18:38:57 +00:00
parent a351f150b2
commit 943057a288
4 changed files with 8 additions and 119 deletions
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2
libclc/generic/lib/SOURCES
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@ -67,8 +67,6 @@ integer/add_sat.cl
integer/add_sat_if.ll
integer/add_sat_impl.ll
integer/clz.cl
integer/clz_if.ll
integer/clz_impl.ll
integer/hadd.cl
integer/mad24.cl
integer/mad_sat.cl

26
libclc/generic/lib/integer/clz.cl
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@ -1,46 +1,36 @@
#include <clc/clc.h>
#include "../clcmacro.h"
// From clz.ll
_CLC_DECL char __clc_clz_s8(char);
_CLC_DECL uchar __clc_clz_u8(uchar);
_CLC_DECL short __clc_clz_s16(short);
_CLC_DECL ushort __clc_clz_u16(ushort);
_CLC_DECL int __clc_clz_s32(int);
_CLC_DECL uint __clc_clz_u32(uint);
_CLC_DECL long __clc_clz_s64(long);
_CLC_DECL ulong __clc_clz_u64(ulong);
_CLC_OVERLOAD _CLC_DEF char clz(char x) {
return __clc_clz_s8(x);
return clz((ushort)(uchar)x) - 8;
}
_CLC_OVERLOAD _CLC_DEF uchar clz(uchar x) {
return __clc_clz_u8(x);
return clz((ushort)x) - 8;
}
_CLC_OVERLOAD _CLC_DEF short clz(short x) {
return __clc_clz_s16(x);
return x ? __builtin_clzs(x) : 16;
}
_CLC_OVERLOAD _CLC_DEF ushort clz(ushort x) {
return __clc_clz_u16(x);
return x ? __builtin_clzs(x) : 16;
}
_CLC_OVERLOAD _CLC_DEF int clz(int x) {
return __clc_clz_s32(x);
return x ? __builtin_clz(x) : 32;
}
_CLC_OVERLOAD _CLC_DEF uint clz(uint x) {
return __clc_clz_u32(x);
return x ? __builtin_clz(x) : 32;
}
_CLC_OVERLOAD _CLC_DEF long clz(long x) {
return __clc_clz_s64(x);
return x ? __builtin_clzl(x) : 64;
}
_CLC_OVERLOAD _CLC_DEF ulong clz(ulong x) {
return __clc_clz_u64(x);
return x ? __builtin_clzl(x) : 64;
}
_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, char, clz, char)

55
libclc/generic/lib/integer/clz_if.ll
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@ -1,55 +0,0 @@
declare i8 @__clc_clz_impl_s8(i8 %x)
define i8 @__clc_clz_s8(i8 %x) nounwind readnone alwaysinline {
%call = call i8 @__clc_clz_impl_s8(i8 %x)
ret i8 %call
}
declare i8 @__clc_clz_impl_u8(i8 %x)
define i8 @__clc_clz_u8(i8 %x) nounwind readnone alwaysinline {
%call = call i8 @__clc_clz_impl_u8(i8 %x)
ret i8 %call
}
declare i16 @__clc_clz_impl_s16(i16 %x)
define i16 @__clc_clz_s16(i16 %x) nounwind readnone alwaysinline {
%call = call i16 @__clc_clz_impl_s16(i16 %x)
ret i16 %call
}
declare i16 @__clc_clz_impl_u16(i16 %x)
define i16 @__clc_clz_u16(i16 %x) nounwind readnone alwaysinline {
%call = call i16 @__clc_clz_impl_u16(i16 %x)
ret i16 %call
}
declare i32 @__clc_clz_impl_s32(i32 %x)
define i32 @__clc_clz_s32(i32 %x) nounwind readnone alwaysinline {
%call = call i32 @__clc_clz_impl_s32(i32 %x)
ret i32 %call
}
declare i32 @__clc_clz_impl_u32(i32 %x)
define i32 @__clc_clz_u32(i32 %x) nounwind readnone alwaysinline {
%call = call i32 @__clc_clz_impl_u32(i32 %x)
ret i32 %call
}
declare i64 @__clc_clz_impl_s64(i64 %x)
define i64 @__clc_clz_s64(i64 %x) nounwind readnone alwaysinline {
%call = call i64 @__clc_clz_impl_s64(i64 %x)
ret i64 %call
}
declare i64 @__clc_clz_impl_u64(i64 %x)
define i64 @__clc_clz_u64(i64 %x) nounwind readnone alwaysinline {
%call = call i64 @__clc_clz_impl_u64(i64 %x)
ret i64 %call
}

44
libclc/generic/lib/integer/clz_impl.ll
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@ -1,44 +0,0 @@
declare i8 @llvm.ctlz.i8(i8, i1)
declare i16 @llvm.ctlz.i16(i16, i1)
declare i32 @llvm.ctlz.i32(i32, i1)
declare i64 @llvm.ctlz.i64(i64, i1)
define i8 @__clc_clz_impl_s8(i8 %x) nounwind readnone alwaysinline {
%call = call i8 @llvm.ctlz.i8(i8 %x, i1 0)
ret i8 %call
}
define i8 @__clc_clz_impl_u8(i8 %x) nounwind readnone alwaysinline {
%call = call i8 @llvm.ctlz.i8(i8 %x, i1 0)
ret i8 %call
}
define i16 @__clc_clz_impl_s16(i16 %x) nounwind readnone alwaysinline {
%call = call i16 @llvm.ctlz.i16(i16 %x, i1 0)
ret i16 %call
}
define i16 @__clc_clz_impl_u16(i16 %x) nounwind readnone alwaysinline {
%call = call i16 @llvm.ctlz.i16(i16 %x, i1 0)
ret i16 %call
}
define i32 @__clc_clz_impl_s32(i32 %x) nounwind readnone alwaysinline {
%call = call i32 @llvm.ctlz.i32(i32 %x, i1 0)
ret i32 %call
}
define i32 @__clc_clz_impl_u32(i32 %x) nounwind readnone alwaysinline {
%call = call i32 @llvm.ctlz.i32(i32 %x, i1 0)
ret i32 %call
}
define i64 @__clc_clz_impl_s64(i64 %x) nounwind readnone alwaysinline {
%call = call i64 @llvm.ctlz.i64(i64 %x, i1 0)
ret i64 %call
}
define i64 @__clc_clz_impl_u64(i64 %x) nounwind readnone alwaysinline {
%call = call i64 @llvm.ctlz.i64(i64 %x, i1 0)
ret i64 %call
}