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Add various prefetch functions to the standard library.

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This commit is contained in:
Matt Pharr
2011-08-03 12:07:30 -07:00
parent 467f1e71d7
commit 0ac4f7b620
6 changed files with 168 additions and 16 deletions
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54
builtins.m4
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@@ -557,6 +557,41 @@ define internal <$1 x $2> @__atomic_compare_exchange_$3_global($2* %ptr, <$1 x $
}
')
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; prefetch definitions
; prefetch has a new parameter in LLVM3.0, to distinguish between instruction
; and data caches--the declaration is now:
; declare void @llvm.prefetch(i8* nocapture %ptr, i32 %readwrite, i32 %locality,
; i32 %cachetype) (cachetype 1 == data cache)
; however, the version below seems to still work...
declare void @llvm.prefetch(i8* nocapture %ptr, i32 %readwrite, i32 %locality)
define(`prefetch_read', `
define internal void @__prefetch_read_1_$1($2 *) alwaysinline {
%ptr8 = bitcast $2 * %0 to i8 *
call void @llvm.prefetch(i8 * %ptr8, i32 0, i32 3)
ret void
}
define internal void @__prefetch_read_2_$1($2 *) alwaysinline {
%ptr8 = bitcast $2 * %0 to i8 *
call void @llvm.prefetch(i8 * %ptr8, i32 0, i32 2)
ret void
}
define internal void @__prefetch_read_3_$1($2 *) alwaysinline {
%ptr8 = bitcast $2 * %0 to i8 *
call void @llvm.prefetch(i8 * %ptr8, i32 0, i32 1)
ret void
}
define internal void @__prefetch_read_nt_$1($2 *) alwaysinline {
%ptr8 = bitcast $2 * %0 to i8 *
call void @llvm.prefetch(i8 * %ptr8, i32 0, i32 0)
ret void
}
')
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
define(`stdlib_core', `
@@ -779,6 +814,25 @@ define internal <$1 x i32> @__sext_varying_bool(<$1 x i32>) nounwind readnone al
ret <$1 x i32> %0
}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; prefetching
prefetch_read(uniform_bool, i1)
prefetch_read(uniform_int8, i8)
prefetch_read(uniform_int16, i16)
prefetch_read(uniform_int32, i32)
prefetch_read(uniform_int64, i64)
prefetch_read(uniform_float, float)
prefetch_read(uniform_double, double)
prefetch_read(varying_bool, <$1 x i32>)
prefetch_read(varying_int8, <$1 x i8>)
prefetch_read(varying_int16, <$1 x i16>)
prefetch_read(varying_int32, <$1 x i32>)
prefetch_read(varying_int64, <$1 x i64>)
prefetch_read(varying_float, <$1 x float>)
prefetch_read(varying_double, <$1 x double>)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; stdlib transcendentals
;;