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Module `dmd.backend.cg87`

x87 FPU code generation

Compiler implementation of the D programming language.

Functions

Name	Description
`cdconvt87(cdb, e, pretregs)`	Operators OPc_r and OPc_i
`cdd_u32(cdb, e, pretregs)`	Do the following opcodes: OPd_u32
`cdd_u64(cdb, e, pretregs)`	Do the following opcodes: OPd_u64 OPld_u64
`cdind87(cdb, e, pretregs)`
`cdnegass87(cdb, e, pretregs)`	OPnegass
`cdrndtol(cdb, e, pretregs)`	Do OPrndtol.
`cdscale(cdb, e, pretregs)`	Do OPscale, OPyl2x, OPyl2xp1.
`cdtoprec(cdb, e, pretregs)`	Round 80 bit precision to 32 or 64 bits. OPtoprec
`cg87_reset()`	Reset statics for another .obj file.
`cload87(cdb, e, pretregs)`	Load complex operand into ST01 or flags or both.
`cmporder87(e)`	Determine if a compare is to be done forwards (return 0) or backwards (return 1). Must follow same logic as load87().
`cnvt87(cdb, e, pretregs)`	Do the following opcodes: OPd_s16 OPd_s32 OPd_u16 OPd_s64
`complex_eq87(cdb, e, pretregs)`	Perform an assignment to a long double/double/float.
`comsub87(cdb, e, pretregs)`	Reload common subexpression.
`eq87(cdb, e, pretregs)`	Perform an assignment to a long double/double/float.
`fixresult87(cdb, e, retregs, pretregs, isReturnValue)`	Given the result of an expression is in retregs, generate necessary code to return result in *pretregs.
`fixresult_complex87(cdb, e, retregs, pretregs, isReturnValue)`	Given the result of an expression is in retregs, generate necessary code to return result in *pretregs.
`genfwait(cdb)`	Decide if we need to gen an FWAIT.
`gensaverestore87(regm, cdbsave, cdbrestore)`	Save/restore ST0 or ST01
`load87(cdb, e, eoffset, pretregs, eleft, op)`	If op == -1, load expression e into ST0. else compute (eleft op e), eleft is in ST0. Must follow same logic as cmporder87();
`loadconst(e, im)`	Determine if there is a special 8087 instruction to load constant e.
`loadPair87(cdb, e, pretregs)`	Load OPpair or OPrpair into mST01
`neg87(cdb, e, pretregs)`	Unary -, absolute value, square root, sine, cosine
`neg_complex87(cdb, e, pretregs)`	Unary - for complex operands
`note87(e, offset, i)`	Note elem e as being in ST(i) as being a value we want to keep.
`opass87(cdb, e, pretregs)`	Perform +=, -=, *= and /= for doubles.
`pop87()`	Pop 8087 stack.
`post87(cdb, e, pretregs)`	Take care of OPpostinc and OPpostdec.
`push87(cdb)`	Push 8087 stack. Generate and return any code necessary to preserve anything that might run off the end of the stack.
`save87(cdb)`	Save in memory any values in the 8087 that we want to keep.
`save87regs(cdb, n)`	Save any noted values that would be destroyed by n pushes
`xchg87(i, j)`	Exchange two entries in 8087 stack.

Structs

Name	Description
`Dconst`

Global variables

Name	Type	Description
`oprev`	`const(ubyte[9])`	Generate in-line 8087 code for the following operators: add min mul div cmp

Authors

Walter Bright

License

Boost License 1.0