| %default {"srcdouble":"1","tgtlong":"1"} |
| /* On fp to int conversions, Java requires that |
| * if the result > maxint, it should be clamped to maxint. If it is less |
| * than minint, it should be clamped to minint. If it is a nan, the result |
| * should be zero. Further, the rounding mode is to truncate. This model |
| * differs from what is delivered normally via the x86 fpu, so we have |
| * to play some games. |
| */ |
| /* float/double to int/long vA, vB */ |
| movzbl rINSTbl,%ecx # ecx<- A+ |
| sarl $$4,rINST # rINST<- B |
| .if $srcdouble |
| fldl (rFP,rINST,4) # %st0<- vB |
| .else |
| flds (rFP,rINST,4) # %st0<- vB |
| .endif |
| ftst |
| fnstcw LOCAL0_OFFSET(%ebp) # remember original rounding mode |
| movzwl LOCAL0_OFFSET(%ebp),%eax |
| movb $$0xc,%ah |
| movw %ax,LOCAL0_OFFSET+2(%ebp) |
| fldcw LOCAL0_OFFSET+2(%ebp) # set "to zero" rounding mode |
| andb $$0xf,%cl # ecx<- A |
| .if $tgtlong |
| fistpll (rFP,%ecx,4) # convert and store |
| .else |
| fistpl (rFP,%ecx,4) # convert and store |
| .endif |
| fldcw LOCAL0_OFFSET(%ebp) # restore previous rounding mode |
| .if $tgtlong |
| movl $$0x80000000,%eax |
| xorl 4(rFP,%ecx,4),%eax |
| orl (rFP,%ecx,4),%eax |
| .else |
| cmpl $$0x80000000,(rFP,%ecx,4) |
| .endif |
| je .L${opcode}_special_case # fix up result |
| |
| .L${opcode}_finish: |
| FETCH_INST_OPCODE 1 %ecx |
| ADVANCE_PC 1 |
| GOTO_NEXT_R %ecx |
| |
| .L${opcode}_special_case: |
| fnstsw %ax |
| sahf |
| jp .L${opcode}_isNaN |
| adcl $$-1,(rFP,%ecx,4) |
| .if $tgtlong |
| adcl $$-1,4(rFP,%ecx,4) |
| .endif |
| jmp .L${opcode}_finish |
| .L${opcode}_isNaN: |
| movl $$0,(rFP,%ecx,4) |
| .if $tgtlong |
| movl $$0,4(rFP,%ecx,4) |
| .endif |
| jmp .L${opcode}_finish |
