aaron/ispc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Stop factoring out constant offsets for gather/scatter if instr is available.

Browse Source 
For KNC (gather/scatter), it's not helpful to factor base+offsets gathers
and scatters into base_ptr + {1/2/4/8} * varying_offsets + const_offsets.
Now, if a HW instruction is available for gather/scatter, we just factor
into base + {1/2/4/8} * offsets (if possible).  Not only is this simpler,
but it's also what we need to pass a value along to the scale by
2/4/8 available directly in those instructions.

Finishes issue #325.
This commit is contained in:
Matt Pharr
2012-07-11 14:52:14 -07:00
parent c09c87873e
commit 216ac4b1a4
7 changed files with 257 additions and 336 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
builtins/target-generic-common.ll
View File

@@ -32,6 +32,9 @@
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128-v16:16:16-v32:32:32";
define(`MASK',`i1')
define(`HAVE_GATHER',`1')
define(`HAVE_SCATTER',`1')
include(`util.m4')
stdlib_core()
@@ -334,19 +337,19 @@ define void @__masked_store_blend_double(<WIDTH x double>* nocapture,
;; gather/scatter
define(`gather_scatter', `
declare <WIDTH x $1> @__gather_factored_base_offsets32_$1(i8 * nocapture, <WIDTH x i32>,
i32, <WIDTH x i32>, <WIDTH x i1>) nounwind readonly
declare <WIDTH x $1> @__gather_factored_base_offsets64_$1(i8 * nocapture, <WIDTH x i64>,
i32, <WIDTH x i64>, <WIDTH x i1>) nounwind readonly
declare <WIDTH x $1> @__gather_base_offsets32_$1(i8 * nocapture, i32, <WIDTH x i32>,
<WIDTH x i1>) nounwind readonly
declare <WIDTH x $1> @__gather_base_offsets64_$1(i8 * nocapture, i32, <WIDTH x i64>,
<WIDTH x i1>) nounwind readonly
declare <WIDTH x $1> @__gather32_$1(<WIDTH x i32>,
<WIDTH x i1>) nounwind readonly
declare <WIDTH x $1> @__gather64_$1(<WIDTH x i64>,
<WIDTH x i1>) nounwind readonly
declare void @__scatter_factored_base_offsets32_$1(i8* nocapture, <WIDTH x i32>,
i32, <WIDTH x i32>, <WIDTH x $1>, <WIDTH x i1>) nounwind
declare void @__scatter_factored_base_offsets64_$1(i8* nocapture, <WIDTH x i64>,
i32, <WIDTH x i64>, <WIDTH x $1>, <WIDTH x i1>) nounwind
declare void @__scatter_base_offsets32_$1(i8* nocapture, i32, <WIDTH x i32>,
<WIDTH x $1>, <WIDTH x i1>) nounwind
declare void @__scatter_base_offsets64_$1(i8* nocapture, i32, <WIDTH x i64>,
<WIDTH x $1>, <WIDTH x i1>) nounwind
declare void @__scatter32_$1(<WIDTH x i32>, <WIDTH x $1>,
<WIDTH x i1>) nounwind
declare void @__scatter64_$1(<WIDTH x i64>, <WIDTH x $1>,