(1/4) Add OCP e4m3 and e5m2 to list of f8 modes

Author: Omar Almatov

softfloat/softfloat.h

@@ -74,12 +74,14 @@ enum {
 *----------------------------------------------------------------------------*/
 extern THREAD_LOCAL uint_fast8_t softfloat_fp8Mode;
 enum {
-    softfloat_fp8_8p5 = 0,
-    softfloat_fp8_8p4 = 1,
-    softfloat_fp8_8p3 = 2
+    softfloat_fp8_8p5   = 0,
+    softfloat_fp8_8p4   = 1,
+    softfloat_fp8_8p3   = 2,
+    softfloat_fp8_e4m3  = 3,
+    softfloat_fp8_e5m2  = 4
 };
 
-extern THREAD_LOCAL uint_fast8_t softfloat_fp8ExpWidths[3];
+extern THREAD_LOCAL uint_fast8_t softfloat_fp8ExpWidths[5];
 
 /*----------------------------------------------------------------------------
 | Software floating-point rounding mode.  (Mode "odd" is supported only if

softfloat/softfloat_state.c

@@ -45,7 +45,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #endif
 
 THREAD_LOCAL uint_fast8_t softfloat_fp8Mode = softfloat_fp8_8p5;
-THREAD_LOCAL uint_fast8_t softfloat_fp8ExpWidths[3] = {3, 4, 5};
+THREAD_LOCAL uint_fast8_t softfloat_fp8ExpWidths[5] = {3, 4, 5, 4, 5};
 THREAD_LOCAL uint_fast8_t softfloat_roundingMode = softfloat_round_near_even;
 THREAD_LOCAL uint_fast8_t softfloat_detectTininess = init_detectTininess;
 THREAD_LOCAL uint_fast8_t softfloat_exceptionFlags = 0;