Fix signbit(double) implementation on MSVC.

alliepiper · alliepiper · commit 3ec7d8daf097 · 2021-02-19T14:49:56.000-05:00
Likely related to pytorch/pytorch#52299.
diff --git a/thrust/detail/complex/c99math.h b/thrust/detail/complex/c99math.h
@@ -84,11 +84,11 @@ __host__ __device__ inline int isnan(double x){
 }
 
 __host__ __device__ inline int signbit(float x){
-  return (*((uint32_t *)&x)) & 0x80000000;
+  return ((*((uint32_t *)&x)) & 0x80000000) != 0 ? 1 : 0;
 }
 
 __host__ __device__ inline int signbit(double x){
-  return (*((uint32_t *)&x)) & 0x80000000;
+  return ((*((uint64_t *)&x)) & 0x8000000000000000) != 0ull ? 1 : 0;
 }
 
 __host__ __device__ inline int isfinite(float x){

Original file line number	Diff line number	Diff line change
`@@ -84,11 +84,11 @@ __host__ __device__ inline int isnan(double x){`
`84`	`84`	`}`
`85`	`85`
`86`	`86`	`__host__ __device__ inline int signbit(float x){`
`87`		`- return (((uint32_t )&x)) & 0x80000000;`
	`87`	`+ return ((((uint32_t )&x)) & 0x80000000) != 0 ? 1 : 0;`
`88`	`88`	`}`
`89`	`89`
`90`	`90`	`__host__ __device__ inline int signbit(double x){`
`91`		`- return (((uint32_t )&x)) & 0x80000000;`
	`91`	`+ return ((((uint64_t )&x)) & 0x8000000000000000) != 0ull ? 1 : 0;`
`92`	`92`	`}`
`93`	`93`
`94`	`94`	`__host__ __device__ inline int isfinite(float x){`