19 #define BH r3  macro
147 		TMP = xor(AH,BH)
151 		EXPB = extractu(BH,#EXPBITS,#HI_MANTBITS)
454 		BH = USR  define
458 		if (p0) BH = or(BH,BL)
461 		USR = BH
475 		BH = extractu(TMP,#2,#SR_ROUND_OFF)  define
480 		BH ^= lsr(AH,#31)
481 		BL = BH
485 		p0 = !cmp.eq(BH,#2)
607 		BH = convert_df2sf(B)  define
611 		BH = convert_df2sf(A)  define
637 		BH ^= asl(AH,#31)		// form correctly signed zero in B