@@ -2161,28 +2161,20 @@ nvptx_print_operand (FILE *file, rtx x, int code)
fputs (".ne", file);
break;
case LE:
+ case LEU:
fputs (".le", file);
break;
case GE:
+ case GEU:
fputs (".ge", file);
break;
case LT:
+ case LTU:
fputs (".lt", file);
break;
case GT:
- fputs (".gt", file);
- break;
- case LEU:
- fputs (".ls", file);
- break;
- case GEU:
- fputs (".hs", file);
- break;
- case LTU:
- fputs (".lo", file);
- break;
case GTU:
- fputs (".hi", file);
+ fputs (".gt", file);
break;
case LTGT:
fputs (".ne", file);
new file mode 100644
@@ -0,0 +1,50 @@
+/* { dg-options "-O2" } */
+/* { dg-do run } */
+
+/* nvptx backend used to emit lo/ls/hs/hi suffixes on unsigned comparison
+ insns instead of the more common lt/le/ge/gt, but ptxas and PTX JIT
+ miscompile 'ls' and 'hi' under some circumstances, such as when the first
+ source operand expands to a constant memory load, as demonstrated below.
+ Reported as NVIDIA bug ID 1725195 (tracker is not public). */
+
+/* Define this to observe PTX translation breakage. */
+//#define EMIT_BROKEN_ASM 1
+
+/* Or define this to get expected codegen. */
+//#define EMIT_WORKING_ASM 1
+
+static __attribute__((noinline,noclone)) int ls(unsigned a)
+{
+ unsigned v;
+ /* %nctaid.x is always 1 in gcc testing. */
+ asm ("mov.u32 %0, %%nctaid.x;" : "=r"(v));
+#if defined(EMIT_BROKEN_ASM)
+ asm ("set.u32.ls.u32 %0, %1, %0;" : "+r"(a) : "r"(v));
+#elif defined(EMIT_WORKING_ASM)
+ asm ("set.u32.le.u32 %0, %1, %0;" : "+r"(a) : "r"(v));
+#else
+ a = v <= a ? -1 : 0;
+#endif
+ return a;
+}
+static __attribute__((noinline,noclone)) int hi(unsigned a)
+{
+ unsigned v;
+ asm ("mov.u32 %0, %%nctaid.x;" : "=r"(v));
+#if defined(EMIT_BROKEN_ASM)
+ asm ("set.u32.hi.u32 %0, %1, %0;" : "+r"(a) : "r"(v));
+#elif defined(EMIT_WORKING_ASM)
+ asm ("set.u32.gt.u32 %0, %1, %0;" : "+r"(a) : "r"(v));
+#else
+ a = v > a ? -1 : 0;
+#endif
+ return a;
+}
+int main()
+{
+ int i;
+ for (i=0; i<3; i++)
+ if (ls(i) != -(1 <= i) || hi(i) != -(1 > i))
+ __builtin_abort();
+ return 0;
+}