|
| |too berepresented a floating-point dataorwhen , contents loating-pointdata too to representedinthe
|
| fpsp_ovfl --- FPSP handler for overflow exception
|
| Overflow occurs when a floating-point intermediate result is
| too large to be represented in a floating-point data register,
| or when storing to memory, the contents of a floating-point
| data register are too large to be represented in the
| destination format.
|
| Trap disabled results
|
| If the instruction is move_out, then garbage is stored in the
| destination. If the instruction is not move_out, then the
| destination is | destination.
|
|on current mode
|
|RNInfinity the of the result
RZ magnitude, with sign
| |destination not. Fors storedatthe destinationbased
| RM For pos overflow, the largest pos number. For neg overflow,
infinityRZ Largestmagnitudenumberwith ofthe
P For overflow infinity negoverflow,the
| |RMFor overflowthe posnumber.For overflow
|
| Trap enabled results
|Alltrapdisabled applies addition exceptional
|RPFor overflow +. Fornegoverflow the
|with of$00subtracted theexponent
|
|
| Copyright (C)|negnumber
|Trap results
|
| For details on the license for|operandneedsto bemade totheusers handler
, READMEi same.
X_OVFL: |idnt 2,1 | Motorola
|| ()Motorola Inc.19java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
|ovf_r_x2
xref
| java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
| store
|
|
java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
xref
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
psp_ovfl
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
fsave
moveml%%/%,(a6
b E3E_BYTEa6)
fmovemlfpcr/fpiar(%)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
The0doesn'set AINEXbitin the FPSR following
| line temporarily rectifies this error.
|
bsetb #ainex_bit,FPSR_AEXCEPT(%a6)
|
b ovf_adj|, &store op
|
| if overflow traps not enabled check for inexact exception
|
tb ovfl_bit(%)
beqs:
|
btstb #E3,E_BYTE(%a6)
beqs USER_FP0%),fp0-
fmoveml(a6%/%fpsr%java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
Itis to either inex1 with
bsrl b1238_fix
movel|. inex bit is in , and
orl sx_mask(%6java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
no_e3_1
moveml()%%d1a0-
. #3%0
USER_FPCR%),%/%/%
frestore ovfl_exit
|Inexact and,andwemusttake exception
bral
|
| It is possible totake_inex:
| ovfl. If the inexbtstbE3(a6
| orinex1 occurredwe clean and to
| realbfextu CMDREG3B%){6#}% | dest java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
|
ck_inex:
| move b1238_fix
|andb FPSR_EXCEPTa6%java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
|andi #$,d0
btstb #inex2_bit,FPCR_ENABLE(%a6)
beqs ovfl_exit
|
| USER_DA%a6%%d1/a0-a1
|
take_inex:
b #,(%)
frestore%a7)
unlka6
bclrb %d0,FPR_DIRTY_BITS(%a6) |clr dest real_inex
bsrl
beqs
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
no_e3_2
moveb#,EXC_VEC(a6
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
fmovemx(%a6,fp0-
fmoveml(%a6,fpcr/fpsrfpiar
frestore b1238_fix test bug1238 java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 10
bral real_inex
ovfl_exit
bclrb #,(%)| andclear bit
beqs
|
dirty on resister the beforebranching
| fpsp_done
|:
USER_DA%),d0-/a0-
%0FPR_DIRTY_BITSa6 clr dirty
bsrl test bug1238
movel (a6FPSR_SHADOWa6
#sx_mask,E_BYTE(%a6)
moveml USER_DA(%a6),%d0-%d1/%a0-%a1
fmovemx USER_FP0(%a6),%fp0-%fp3
fmoveml USER_FPCR(%6),%fpcr%fpsr%java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
frestoreovf_adj:
unlk | Havea0 point to correct .
bral fpsp_done
e1_set
movemlUSER_DA%a6),d0-/%%a1
fmovemxbeqsjava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
fmovemlUSER_FPCR%),fpcrfpsrfpiar
unlk %a6
bral fpsp_done
|
| ovf_adj
|
ovf_adj:
|
| Have a0 point to theovf_e1:
|
btstbovf_comjava.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
beqs ovf_e1
lea WBTEMP(%a6),%a0
bras ovf_com
ovf_e1
lea(%a6)%a0
ovf_com
bclrbsign_bit,(%0
sne
bsrl |returnsopclass d0
cmpiw #,d0| for opclass3
bnes moveb FPSR_CC%a6,(%)
|
| FPSR_CC is saved and restored because ovf_r_x3 affects moveb(a6,FPSR_CC(a6
|CCs definedto benotaffected theopclass3 instruction
|
moveb FPSR_CC(%a6),L_SCR1(%a6)
bsrl :
moveb L_SCR1bsrl ovf_r_x2|returnsa0 toresult
ral | tomemory register
ot_opc011
bsrl ovf_r_x2 |returns a0 pointing to result
bral store |stores to memory or register
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