waterDataStatisticsCrossAssociation correlativeCalculationWaterTankFireHydrant.c 徐寅秋 commit at 2020-11-10

waterDataStatisticsCrossAssociation/waterTankDataAssociation/correlativeCalculationWaterTankFireHydrant.c

@@ -104,3 +104,114 @@ u32 vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exce
 		exponent -= shift;
 		significand <<= shift;
 	}
+
+#ifdef DEBUG
+	vs->exponent = exponent;
+	vs->significand = significand;
+	vfp_single_dump("pack: normalised", vs);
+#endif
+
+	/*
+	 * Tiny number?
+	 */
+	underflow = exponent < 0;
+	if (underflow) {
+		significand = vfp_shiftright32jamming(significand, -exponent);
+		exponent = 0;
+#ifdef DEBUG
+		vs->exponent = exponent;
+		vs->significand = significand;
+		vfp_single_dump("pack: tiny number", vs);
+#endif
+		if (!(significand & ((1 << (VFP_SINGLE_LOW_BITS + 1)) - 1)))
+			underflow = 0;
+	}
+
+	/*
+	 * Select rounding increment.
+	 */
+	incr = 0;
+	rmode = fpscr & FPSCR_RMODE_MASK;
+
+	if (rmode == FPSCR_ROUND_NEAREST) {
+		incr = 1 << VFP_SINGLE_LOW_BITS;
+		if ((significand & (1 << (VFP_SINGLE_LOW_BITS + 1))) == 0)
+			incr -= 1;
+	} else if (rmode == FPSCR_ROUND_TOZERO) {
+		incr = 0;
+	} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vs->sign != 0))
+		incr = (1 << (VFP_SINGLE_LOW_BITS + 1)) - 1;
+
+	pr_debug("VFP: rounding increment = 0x%08x\n", incr);
+
+	/*
+	 * Is our rounding going to overflow?
+	 */
+	if ((significand + incr) < significand) {
+		exponent += 1;
+		significand = (significand >> 1) | (significand & 1);
+		incr >>= 1;
+#ifdef DEBUG
+		vs->exponent = exponent;
+		vs->significand = significand;
+		vfp_single_dump("pack: overflow", vs);
+#endif
+	}
+
+	/*
+	 * If any of the low bits (which will be shifted out of the
+	 * number) are non-zero, the result is inexact.
+	 */
+	if (significand & ((1 << (VFP_SINGLE_LOW_BITS + 1)) - 1))
+		exceptions |= FPSCR_IXC;
+
+	/*
+	 * Do our rounding.
+	 */
+	significand += incr;
+
+	/*
+	 * Infinity?
+	 */
+	if (exponent >= 254) {
+		exceptions |= FPSCR_OFC | FPSCR_IXC;
+		if (incr == 0) {
+			vs->exponent = 253;
+			vs->significand = 0x7fffffff;
+		} else {
+			vs->exponent = 255;		/* infinity */
+			vs->significand = 0;
+		}
+	} else {
+		if (significand >> (VFP_SINGLE_LOW_BITS + 1) == 0)
+			exponent = 0;
+		if (exponent || significand > 0x80000000)
+			underflow = 0;
+		if (underflow)
+			exceptions |= FPSCR_UFC;
+		vs->exponent = exponent;
+		vs->significand = significand >> 1;
+	}
+
+ pack:
+	vfp_single_dump("pack: final", vs);
+	{
+		s32 d = vfp_single_pack(vs);
+#ifdef DEBUG
+		pr_debug("VFP: %s: d(s%d)=%08x exceptions=%08x\n", func,
+			 sd, d, exceptions);
+#endif
+		vfp_put_float(d, sd);
+	}
+
+	return exceptions;
+}
+
+/*
+ * Propagate the NaN, setting exceptions if it is signalling.
+ * 'n' is always a NaN.  'm' may be a number, NaN or infinity.
+ */
+static u32
+vfp_propagate_nan(struct vfp_single *vsd, struct vfp_single *vsn,
+		  struct vfp_single *vsm, u32 fpscr)
+{