| %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 $$4, rINST # rINST <- B |
| .if $srcdouble |
| fldl VREG_ADDRESS(rINST) # %st0 <- vB |
| .else |
| flds VREG_ADDRESS(rINST) # %st0 <- vB |
| .endif |
| ftst |
| fnstcw LOCAL0(%esp) # remember original rounding mode |
| movzwl LOCAL0(%esp), %eax |
| movb $$0xc, %ah |
| movw %ax, LOCAL0+2(%esp) |
| fldcw LOCAL0+2(%esp) # set "to zero" rounding mode |
| andb $$0xf, %cl # ecx <- A |
| .if $tgtlong |
| fistpll VREG_ADDRESS(%ecx) # convert and store |
| .else |
| fistpl VREG_ADDRESS(%ecx) # convert and store |
| .endif |
| fldcw LOCAL0(%esp) # restore previous rounding mode |
| .if $tgtlong |
| movl $$0x80000000, %eax |
| xorl VREG_HIGH_ADDRESS(%ecx), %eax |
| orl VREG_ADDRESS(%ecx), %eax |
| .else |
| cmpl $$0x80000000, VREG_ADDRESS(%ecx) |
| .endif |
| je .L${opcode}_special_case # fix up result |
| |
| .L${opcode}_finish: |
| xor %eax, %eax |
| mov %eax, VREG_REF_ADDRESS(%ecx) |
| .if $tgtlong |
| mov %eax, VREG_REF_HIGH_ADDRESS(%ecx) |
| .endif |
| ADVANCE_PC_FETCH_AND_GOTO_NEXT 1 |
| |
| .L${opcode}_special_case: |
| fnstsw %ax |
| sahf |
| jp .L${opcode}_isNaN |
| adcl $$-1, VREG_ADDRESS(%ecx) |
| .if $tgtlong |
| adcl $$-1, VREG_HIGH_ADDRESS(%ecx) |
| .endif |
| jmp .L${opcode}_finish |
| .L${opcode}_isNaN: |
| movl $$0, VREG_ADDRESS(%ecx) |
| .if $tgtlong |
| movl $$0, VREG_HIGH_ADDRESS(%ecx) |
| .endif |
| jmp .L${opcode}_finish |
