Adding some new functions to System.Math and System.MathF (#20788)

* Adding BitIncrement, BitDecrement, CopySign, MaxMagnitude, and MinMagnitude to Math and MathF

* Adding FusedMultiplyAdd, IlogB, Log2, and ScaleB to Math and MathF

* Adding some basic PAL tests for fma, ilogb, log2, and scalbn

* Fixing a couple typos and adding clarifying comments

* Fixing the MSVC _VVV FCALL declarations

1 files changed, 17 insertions, 1 deletions

diff --git a/src/pal/inc/pal.h b/src/pal/inc/pal.h
index 690804013e..a7f0ff5d74 100644
--- a/src/pal/inc/pal.h
+++ b/src/pal/inc/pal.h
@@ -4158,18 +4158,26 @@ SetThreadIdealProcessorEx(
 #define asinh         PAL_asinh
 #define atan2         PAL_atan2
 #define exp           PAL_exp
+#define fma           PAL_fma
+#define ilogb         PAL_ilogb
 #define log           PAL_log
+#define log2          PAL_log2
 #define log10         PAL_log10
 #define pow           PAL_pow
+#define scalbn        PAL_scalbn
 #define acosf         PAL_acosf
 #define acoshf        PAL_acoshf
 #define asinf         PAL_asinf
 #define asinhf        PAL_asinhf
 #define atan2f        PAL_atan2f
 #define expf          PAL_expf
+#define fmaf          PAL_fmaf
+#define ilogbf        PAL_ilogbf
 #define logf          PAL_logf
+#define log2f         PAL_log2f
 #define log10f        PAL_log10f
 #define powf          PAL_powf
+#define scalbnf       PAL_scalbnf
 #define malloc        PAL_malloc
 #define free          PAL_free
 #define mkstemp       PAL_mkstemp
@@ -4424,10 +4432,14 @@ PALIMPORT double __cdecl exp(double);
 PALIMPORT double __cdecl fabs(double);
 PALIMPORT double __cdecl floor(double);
 PALIMPORT double __cdecl fmod(double, double); 
+PALIMPORT double __cdecl fma(double, double, double);
+PALIMPORT int __cdecl ilogb(double);
 PALIMPORT double __cdecl log(double);
+PALIMPORT double __cdecl log2(double);
 PALIMPORT double __cdecl log10(double);
 PALIMPORT double __cdecl modf(double, double*);
 PALIMPORT double __cdecl pow(double, double);
+PALIMPORT double __cdecl scalbn(double, int);
 PALIMPORT double __cdecl sin(double);
 PALIMPORT double __cdecl sinh(double);
 PALIMPORT double __cdecl sqrt(double);
@@ -4452,11 +4464,15 @@ PALIMPORT float __cdecl coshf(float);
 PALIMPORT float __cdecl expf(float);
 PALIMPORT float __cdecl fabsf(float);
 PALIMPORT float __cdecl floorf(float);
-PALIMPORT float __cdecl fmodf(float, float); 
+PALIMPORT float __cdecl fmodf(float, float);
+PALIMPORT float __cdecl fmaf(float, float, float);
+PALIMPORT int __cdecl ilogbf(float);
 PALIMPORT float __cdecl logf(float);
+PALIMPORT float __cdecl log2f(float);
 PALIMPORT float __cdecl log10f(float);
 PALIMPORT float __cdecl modff(float, float*);
 PALIMPORT float __cdecl powf(float, float);
+PALIMPORT float __cdecl scalbnf(float, int);
 PALIMPORT float __cdecl sinf(float);
 PALIMPORT float __cdecl sinhf(float);
 PALIMPORT float __cdecl sqrtf(float);