Make single precision floating point arithmetic actually work -- I think
it never did -- and fix an obvious missing line. Floating point emulation on Book-E still needs some work but this gets it basically functional on soft-FPU systems (hard FPU for Book-E is not yet implemented). MFC after: 1 week
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=258250
@ -606,9 +606,11 @@ fpu_execute(struct trapframe *tf, struct fpemu *fe, union instr *insn)
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rb = instr.i_a.i_frb;
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rc = instr.i_a.i_frc;
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type = FTYPE_SNG;
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if (instr.i_any.i_opcd & 0x4)
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type = FTYPE_DBL;
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/*
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* All arithmetic operations work on registers, which
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* are stored as doubles.
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*/
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type = FTYPE_DBL;
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switch ((unsigned int)instr.i_a.i_xo) {
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case OPC59_FDIVS:
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FPU_EMU_EVCNT_INCR(fdiv);
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@ -725,6 +727,13 @@ fpu_execute(struct trapframe *tf, struct fpemu *fe, union instr *insn)
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return (NOTFPU);
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break;
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}
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/* If the instruction was single precision, round */
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if (!(instr.i_any.i_opcd & 0x4)) {
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fpu_implode(fe, fp, FTYPE_SNG,
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(u_int *)&fs->fpreg[rt]);
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fpu_explode(fe, fp = &fe->fe_f1, FTYPE_SNG, rt);
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}
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}
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} else {
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return (NOTFPU);
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@ -235,6 +235,7 @@ fpu_explode(struct fpemu *fe, struct fpn *fp, int type, int reg)
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s = fpu_dtof(fp, s, space[1]);
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break;
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default:
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panic("fpu_explode");
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panic("fpu_explode: invalid type %d", type);
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}
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