Use fabsf() instead of Abs() or fabs() where appropriate

This function is new in C99.

Reviewed-by: Zhang Mingli <zmlpostgres@gmail.com>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/4beb42b5-216b-bce8-d452-d924d5794c63%40enterprisedb.com

contrib/btree_gist/btree_float4.c

@@ -102,7 +102,7 @@ float4_dist(PG_FUNCTION_ARGS)
 	if (unlikely(isinf(r)) && !isinf(a) && !isinf(b))
 		float_overflow_error();
 
-	PG_RETURN_FLOAT4(Abs(r));
+	PG_RETURN_FLOAT4(fabsf(r));
 }
 
 

contrib/intarray/_int_gist.c

@@ -540,7 +540,7 @@ g_int_picksplit(PG_FUNCTION_ARGS)
 		union_d = inner_int_union(datum_r, datum_alpha);
 		rt__int_size(union_d, &size_beta);
 		pfree(union_d);
-		costvector[i - 1].cost = fabs((size_alpha - size_l) - (size_beta - size_r));
+		costvector[i - 1].cost = fabsf((size_alpha - size_l) - (size_beta - size_r));
 	}
 	qsort((void *) costvector, maxoff, sizeof(SPLITCOST), comparecost);
 

contrib/seg/seg.c

@@ -10,6 +10,7 @@
 #include "postgres.h"
 
 #include <float.h>
+#include <math.h>
 
 #include "access/gist.h"
 #include "access/stratnum.h"
@@ -706,7 +707,7 @@ rt_seg_size(SEG *a, float *size)
 	if (a == (SEG *) NULL || a->upper <= a->lower)
 		*size = 0.0;
 	else
-		*size = (float) Abs(a->upper - a->lower);
+		*size = fabsf(a->upper - a->lower);
 }
 
 Datum
@@ -714,7 +715,7 @@ seg_size(PG_FUNCTION_ARGS)
 {
 	SEG		   *seg = PG_GETARG_SEG_P(0);
 
-	PG_RETURN_FLOAT4((float) Abs(seg->upper - seg->lower));
+	PG_RETURN_FLOAT4(fabsf(seg->upper - seg->lower));
 }
 
 

src/backend/utils/adt/float.c

@@ -593,7 +593,7 @@ float4abs(PG_FUNCTION_ARGS)
 {
 	float4		arg1 = PG_GETARG_FLOAT4(0);
 
-	PG_RETURN_FLOAT4((float4) fabs(arg1));
+	PG_RETURN_FLOAT4(fabsf(arg1));
 }
 
 /*