25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * CDDL HEADER START
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25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * You may not use this file except in compliance with the License.
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25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis * Use is subject to license terms.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtislt2_hi: .long 0xfbd00000, 0x9a209a84, 0x00003ffd
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtislt2_lo: .long 0x653f4837, 0x8677076a, 0x0000bfc9
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis andl $0x00007fff,%ecx / ecx <-- zero_xtnd(bexp(x))
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0x00003ffd,%ecx / Is |x| < log10(2)?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis je .check_tail / maybe |x| only slightly < log10(2)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0x00007fff,%ecx / bexp(|x|) = bexp(INF)?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0x0000400e,%ecx / |x| < 32768 = 2^15?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis jb .finite_non_special / if so, proceed with argument reduction
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis.finite_non_special: / Here, log10(2) < |x| < 2^15
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fldt PIC_L(lt2_lo) / lt2_lo, x-[z]*lt2_hi, [z]
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fmul %st(2),%st / [z]*lt2_lo, x-[z]*lt2_hi, [z]
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fsubrp %st,%st(1) / r := x-[z]*log10(2), [z]
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis movl 8(%esp),%ecx / ecx <-- hi_32(sgnfcnd(x))
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0x9a209a84,%ecx / Is |x| < log10(2)?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis movl 4(%esp),%edx / edx <-- lo_32(sgnfcnd(x))
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0xfbcff798,%edx / Is |x| slightly > log10(2)?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis ja .finite_non_special / branch if |x| slightly > log10(2)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis / Here, |x| < log10(2), so |z| = |x/log10(2)| < 1
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fldt 4(%esp) / x
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fldl2t / log2(10), x
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fmulp / z := x*log2(10)
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fld1 / 1, 2^z-1
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis faddp %st,%st(1) / 10^x
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis movl 8(%esp),%ecx / ecx <-- hi_32(sgnfcnd(x))
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0x80000000,%ecx / hi_32(sgnfcnd(x)) = hi_32(sgnfcnd(INF))?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis jne .NaN_or_pinf / if not, x is NaN or unsupp.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis movl 4(%esp),%edx / edx <-- lo_32(sgnfcnd(x))
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis cmpl $0,%edx / lo_32(sgnfcnd(x)) = 0?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis jne .NaN_or_pinf / if not, x is NaN
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis movl 12(%esp),%eax / ax <-- sign&bexp((x))
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis andl $0x00008000,%eax / here, x is infinite, but +/-?
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis jz .NaN_or_pinf / branch if x = +INF
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis fldz / Here, x = -inf, so return 0
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis / Here, x = NaN or +inf, so load x and return immediately.
25c28e83beb90e7c80452a7c818c5e6f73a07dc8Piotr Jasiukajtis SET_SIZE(exp10l)