65 lines
1.5 KiB
ArmAsm
65 lines
1.5 KiB
ArmAsm
#################################################################
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# #
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# Copyright 2007, 2008 Fidelity Information Services, Inc #
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# #
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# This source code contains the intellectual property #
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# of its copyright holder(s), and is made available #
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# under a license. If you do not know the terms of #
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# the license, please stop and do not read further. #
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# #
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#################################################################
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# PAGE ,132
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.title op_neg.s
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# .386
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# .MODEL FLAT, C
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.include "g_msf.si"
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.include "linkage.si"
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.INCLUDE "mval_def.si"
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.sbttl op_neg
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# PAGE +
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.text
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#
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# op_neg ( mval *u, mval *v ) : u = -v
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#
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# REG64_RET1 - source mval = &v
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# REG64_RET0 - destination mval = &u
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.extern s2n
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.extern underr
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# PUBLIC op_neg
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ENTRY op_neg
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pushq REG64_RET0
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mv_force_defined REG64_RET1, isdefined
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popq REG64_RET0
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mv_if_number REG64_RET1, numer
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pushq REG64_RET0
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pushq REG64_RET1
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movq REG64_RET1,REG64_ARG0
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call s2n
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popq REG64_RET1
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popq REG64_RET0
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numer: mv_if_notint REG64_RET1, float
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movw $mval_m_int,mval_w_mvtype(REG64_RET0)
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movl mval_l_m1(REG64_RET1),REG32_RET1
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negl REG32_RET1
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movl REG32_RET1,mval_l_m1(REG64_RET0)
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ret
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float: movw $mval_m_nm,mval_w_mvtype(REG64_RET0)
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movb mval_b_exp(REG64_RET1),REG8_SCRATCH1
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xorb $mval_esign_mask,REG8_SCRATCH1 # flip the sign bit
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movb REG8_SCRATCH1,mval_b_exp(REG64_RET0)
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movl mval_l_m0(REG64_RET1),REG32_SCRATCH1
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movl REG32_SCRATCH1,mval_l_m0(REG64_RET0)
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movl mval_l_m1(REG64_RET1),REG32_SCRATCH1
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movl REG32_SCRATCH1,mval_l_m1(REG64_RET0)
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ret
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# op_neg ENDP
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#END
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