RKSimon created this revision.
RKSimon added reviewers: majnemer, echristo, silvas.
RKSimon added a subscriber: cfe-commits.
RKSimon set the repository for this revision to rL LLVM.
The 3DNOW/PRFCHW cpu targets define both the PREFETCHW (set cache line
modified) and PREFETCH (set cache line exclusive) instructions but only the
_m_prefetchw (PREFETCHW) intrinsic is included in the header. This patch adds
the missing _m_prefetch intrinsic.
I'm basing this off AMD documentation - the intel docs on the support for
PREFETCHW isn't clear whether Silvermont/Broadwell properly support PREFETCH
but given that the intrinsic implementation is a default __builtin_prefetch
call, it is safe whatever.
Fix for PR23648
Repository:
rL LLVM
http://reviews.llvm.org/D11338
Files:
lib/Headers/prfchwintrin.h
test/CodeGen/prefetchw-builtins.c
Index: test/CodeGen/prefetchw-builtins.c
===================================================================
--- test/CodeGen/prefetchw-builtins.c
+++ test/CodeGen/prefetchw-builtins.c
@@ -5,8 +5,14 @@
#include <x86intrin.h>
-void prefetch_w(void *p) {
+void test_m_prefetch_w(void *p) {
return _m_prefetchw(p);
-// CHECK: @prefetch_w
+// CHECK-LABEL: define void @test_m_prefetch_w
// CHECK: call void @llvm.prefetch({{.*}}, i32 1, i32 3, i32 1)
}
+
+void test_m_prefetch(void *p) {
+ return _m_prefetch(p);
+ // CHECK-LABEL: define void @test_m_prefetch
+ // CHECK: call void @llvm.prefetch({{.*}}, i32 0, i32 3, i32 1)
+}
Index: lib/Headers/prfchwintrin.h
===================================================================
--- lib/Headers/prfchwintrin.h
+++ lib/Headers/prfchwintrin.h
@@ -30,6 +30,12 @@
#if defined(__PRFCHW__) || defined(__3dNOW__)
static __inline__ void __attribute__((__always_inline__, __nodebug__))
+_m_prefetch(void *__P)
+{
+ __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
+}
+
+static __inline__ void __attribute__((__always_inline__, __nodebug__))
_m_prefetchw(void *__P)
{
__builtin_prefetch (__P, 1, 3 /* _MM_HINT_T0 */);
Index: test/CodeGen/prefetchw-builtins.c
===================================================================
--- test/CodeGen/prefetchw-builtins.c
+++ test/CodeGen/prefetchw-builtins.c
@@ -5,8 +5,14 @@
#include <x86intrin.h>
-void prefetch_w(void *p) {
+void test_m_prefetch_w(void *p) {
return _m_prefetchw(p);
-// CHECK: @prefetch_w
+// CHECK-LABEL: define void @test_m_prefetch_w
// CHECK: call void @llvm.prefetch({{.*}}, i32 1, i32 3, i32 1)
}
+
+void test_m_prefetch(void *p) {
+ return _m_prefetch(p);
+ // CHECK-LABEL: define void @test_m_prefetch
+ // CHECK: call void @llvm.prefetch({{.*}}, i32 0, i32 3, i32 1)
+}
Index: lib/Headers/prfchwintrin.h
===================================================================
--- lib/Headers/prfchwintrin.h
+++ lib/Headers/prfchwintrin.h
@@ -30,6 +30,12 @@
#if defined(__PRFCHW__) || defined(__3dNOW__)
static __inline__ void __attribute__((__always_inline__, __nodebug__))
+_m_prefetch(void *__P)
+{
+ __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
+}
+
+static __inline__ void __attribute__((__always_inline__, __nodebug__))
_m_prefetchw(void *__P)
{
__builtin_prefetch (__P, 1, 3 /* _MM_HINT_T0 */);
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