https://github.com/MalaySanghi created https://github.com/llvm/llvm-project/pull/93774
Supported: outp, outpw, _outp, _outpw, _outpd
These functions were removed from the Windows runtime library, but for kernel mode development it's still supported
>From 38359132ea0b3b56900ba48827c86a93c017223a Mon Sep 17 00:00:00 2001
From: Malay Sanghi <malay.sanghi at intel.com>
Date: Wed, 29 May 2024 22:40:47 -0700
Subject: [PATCH] Add support for _outp{|w|d}
---
clang/lib/Headers/intrin.h | 20 +++++
clang/test/CodeGen/X86/ms-x86-intrinsics.c | 85 ++++++++++++++++++++++
2 files changed, 105 insertions(+)
diff --git a/clang/lib/Headers/intrin.h b/clang/lib/Headers/intrin.h
index 5ceb986a1f652..21a3f030216e6 100644
--- a/clang/lib/Headers/intrin.h
+++ b/clang/lib/Headers/intrin.h
@@ -329,6 +329,26 @@ static __inline__ void __DEFAULT_FN_ATTRS __stosq(unsigned __int64 *__dst,
static __inline__ void __DEFAULT_FN_ATTRS __halt(void) {
__asm__ volatile("hlt");
}
+
+static __inline__ int __DEFAULT_FN_ATTRS _outp(unsigned short port, int data) {
+ __asm__ volatile("outb %b0, %w1" : : "a"(data), "Nd"(port) : "memory");
+ return data;
+}
+
+static __inline__ unsigned short __DEFAULT_FN_ATTRS
+_outpw(unsigned short port, unsigned short data) {
+ __asm__ volatile("outw %w0, %w1" : : "a"(data), "Nd"(port) : "memory");
+ return data;
+}
+
+static __inline__ unsigned long __DEFAULT_FN_ATTRS _outpd(unsigned short port,
+ unsigned long data) {
+ __asm__ volatile("outl %k0, %w1" : : "a"(data), "Nd"(port) : "memory");
+ return data;
+}
+
+#define outp(port, data) _outp(port, data)
+#define outpw(R, D) _outpw(port, data)
#endif
#if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__)
diff --git a/clang/test/CodeGen/X86/ms-x86-intrinsics.c b/clang/test/CodeGen/X86/ms-x86-intrinsics.c
index aa557c8e19a83..e990ccd3449ac 100644
--- a/clang/test/CodeGen/X86/ms-x86-intrinsics.c
+++ b/clang/test/CodeGen/X86/ms-x86-intrinsics.c
@@ -63,6 +63,91 @@ unsigned __int64 test__emulu(unsigned int a, unsigned int b) {
// CHECK: [[RES:%[0-9]+]] = mul nuw i64 [[Y]], [[X]]
// CHECK: ret i64 [[RES]]
+//
+// CHECK-I386-LABEL: define dso_local noundef i32 @test_outp(
+// CHECK-I386-SAME: i16 noundef zeroext [[PORT:%.*]], i32 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR2:[0-9]+]] {
+// CHECK-I386-NEXT: [[ENTRY:.*:]]
+// CHECK-I386-NEXT: tail call void asm sideeffect "outb ${0:b}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i32 [[DATA]], i16 [[PORT]]) #[[ATTR3:[0-9]+]], !srcloc [[META4:![0-9]+]]
+// CHECK-I386-NEXT: ret i32 [[DATA]]
+//
+// CHECK-X64-LABEL: define dso_local noundef i32 @test_outp(
+// CHECK-X64-SAME: i16 noundef [[PORT:%.*]], i32 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR1:[0-9]+]] {
+// CHECK-X64-NEXT: [[ENTRY:.*:]]
+// CHECK-X64-NEXT: tail call void asm sideeffect "outb ${0:b}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i32 [[DATA]], i16 [[PORT]]) #[[ATTR5:[0-9]+]], !srcloc [[META3:![0-9]+]]
+// CHECK-X64-NEXT: ret i32 [[DATA]]
+//
+int test_outp(unsigned short port, int data) {
+ return _outp(port, data);
+}
+
+//
+// CHECK-I386-LABEL: define dso_local noundef zeroext i16 @test_outpw(
+// CHECK-I386-SAME: i16 noundef zeroext [[PORT:%.*]], i16 noundef returned zeroext [[DATA:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-I386-NEXT: [[ENTRY:.*:]]
+// CHECK-I386-NEXT: tail call void asm sideeffect "outw ${0:w}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i16 [[DATA]], i16 [[PORT]]) #[[ATTR3]], !srcloc [[META5:![0-9]+]]
+// CHECK-I386-NEXT: ret i16 [[DATA]]
+//
+// CHECK-X64-LABEL: define dso_local noundef i16 @test_outpw(
+// CHECK-X64-SAME: i16 noundef [[PORT:%.*]], i16 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR1]] {
+// CHECK-X64-NEXT: [[ENTRY:.*:]]
+// CHECK-X64-NEXT: tail call void asm sideeffect "outw ${0:w}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i16 [[DATA]], i16 [[PORT]]) #[[ATTR5]], !srcloc [[META4:![0-9]+]]
+// CHECK-X64-NEXT: ret i16 [[DATA]]
+//
+unsigned short test_outpw(unsigned short port, unsigned short data) {
+ return _outpw(port, data);
+}
+
+//
+// CHECK-I386-LABEL: define dso_local noundef i32 @test_outpd(
+// CHECK-I386-SAME: i16 noundef zeroext [[PORT:%.*]], i32 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-I386-NEXT: [[ENTRY:.*:]]
+// CHECK-I386-NEXT: tail call void asm sideeffect "outl ${0:k}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i32 [[DATA]], i16 [[PORT]]) #[[ATTR3]], !srcloc [[META6:![0-9]+]]
+// CHECK-I386-NEXT: ret i32 [[DATA]]
+//
+// CHECK-X64-LABEL: define dso_local noundef i32 @test_outpd(
+// CHECK-X64-SAME: i16 noundef [[PORT:%.*]], i32 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR1]] {
+// CHECK-X64-NEXT: [[ENTRY:.*:]]
+// CHECK-X64-NEXT: tail call void asm sideeffect "outl ${0:k}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i32 [[DATA]], i16 [[PORT]]) #[[ATTR5]], !srcloc [[META5:![0-9]+]]
+// CHECK-X64-NEXT: ret i32 [[DATA]]
+//
+unsigned long test_outpd(unsigned short port, unsigned long data) {
+ return _outpd(port, data);
+}
+
+//
+// CHECK-I386-LABEL: define dso_local noundef i32 @test_outp2(
+// CHECK-I386-SAME: i16 noundef zeroext [[PORT:%.*]], i32 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-I386-NEXT: [[ENTRY:.*:]]
+// CHECK-I386-NEXT: tail call void asm sideeffect "outb ${0:b}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i32 [[DATA]], i16 [[PORT]]) #[[ATTR3]], !srcloc [[META4]]
+// CHECK-I386-NEXT: ret i32 [[DATA]]
+//
+// CHECK-X64-LABEL: define dso_local noundef i32 @test_outp2(
+// CHECK-X64-SAME: i16 noundef [[PORT:%.*]], i32 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR1]] {
+// CHECK-X64-NEXT: [[ENTRY:.*:]]
+// CHECK-X64-NEXT: tail call void asm sideeffect "outb ${0:b}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i32 [[DATA]], i16 [[PORT]]) #[[ATTR5]], !srcloc [[META3]]
+// CHECK-X64-NEXT: ret i32 [[DATA]]
+//
+int test_outp2(unsigned short port, int data) {
+ return outp(port, data);
+}
+
+//
+// CHECK-I386-LABEL: define dso_local noundef zeroext i16 @test_outpw2(
+// CHECK-I386-SAME: i16 noundef zeroext [[PORT:%.*]], i16 noundef returned zeroext [[DATA:%.*]]) local_unnamed_addr #[[ATTR2]] {
+// CHECK-I386-NEXT: [[ENTRY:.*:]]
+// CHECK-I386-NEXT: tail call void asm sideeffect "outw ${0:w}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i16 [[DATA]], i16 [[PORT]]) #[[ATTR3]], !srcloc [[META5]]
+// CHECK-I386-NEXT: ret i16 [[DATA]]
+//
+// CHECK-X64-LABEL: define dso_local noundef i16 @test_outpw2(
+// CHECK-X64-SAME: i16 noundef [[PORT:%.*]], i16 noundef returned [[DATA:%.*]]) local_unnamed_addr #[[ATTR1]] {
+// CHECK-X64-NEXT: [[ENTRY:.*:]]
+// CHECK-X64-NEXT: tail call void asm sideeffect "outw ${0:w}, ${1:w}", "{ax},N{dx},~{memory},~{dirflag},~{fpsr},~{flags}"(i16 [[DATA]], i16 [[PORT]]) #[[ATTR5]], !srcloc [[META4]]
+// CHECK-X64-NEXT: ret i16 [[DATA]]
+//
+unsigned short test_outpw2(unsigned short port, unsigned short data) {
+ return outpw(port, data);
+}
+
#if defined(__x86_64__)
char test__readgsbyte(unsigned long Offset) {