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Add count_{leading,trailing}_zeros() functions to stdlib.

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(Documentation is still yet to be written.)
This commit is contained in:
Matt Pharr
2011-11-30 10:12:16 -08:00
parent 1703f2717c
commit 7a2561c429
9 changed files with 192 additions and 6 deletions
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22
builtins.m4
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@@ -1094,11 +1094,26 @@ define <$1 x i32> @__sext_varying_bool(<$1 x i32>) nounwind readnone alwaysinlin
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; count trailing zeros
define i32 @__count_trailing_zeros(i32) nounwind readnone alwaysinline {
define i32 @__count_trailing_zeros_i32(i32) nounwind readnone alwaysinline {
%c = call i32 @llvm.cttz.i32(i32 %0)
ret i32 %c
}
define i64 @__count_trailing_zeros_i64(i64) nounwind readnone alwaysinline {
%c = call i64 @llvm.cttz.i64(i64 %0)
ret i64 %c
}
define i32 @__count_leading_zeros_i32(i32) nounwind readnone alwaysinline {
%c = call i32 @llvm.ctlz.i32(i32 %0)
ret i32 %c
}
define i64 @__count_leading_zeros_i64(i64) nounwind readnone alwaysinline {
%c = call i64 @llvm.ctlz.i64(i64 %0)
ret i64 %c
}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; AOS/SOA conversion primitives
@@ -2500,8 +2515,11 @@ done:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; reduce_equal
; count trailing zeros
; count leading/trailing zeros
declare i32 @llvm.ctlz.i32(i32)
declare i64 @llvm.ctlz.i64(i64)
declare i32 @llvm.cttz.i32(i32)
declare i64 @llvm.cttz.i64(i64)
define(`reduce_equal_aux', `
define i1 @__reduce_equal_$3(<$1 x $2> %v, $2 * %samevalue,