200 lines
3.6 KiB
C
200 lines
3.6 KiB
C
#include "rules.y"
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| OP_LI GPR ',' expr
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{
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word_t reg = $2;
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word_t type = $4.typ & S_TYP;
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word_t val = $4.val;
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if (type != S_ABS)
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serror("li cannot be used with values that need a fixup");
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if (val == 0)
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emit4(0x00000025 | (reg<<11)); /* or reg, zero, zero */
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else if ((val < -0x8000) || (val > 0xffff))
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emit4(0x24000000 | (reg<<16) | (val & 0xffff)); /* addiu reg, zero, value */
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else
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{
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emit4(0x3c000000 | (reg<<16) | (val>>16)); /* lui reg, value */
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emit4(0x34000000 | (reg<<16) | (reg<<21) | (val & 0xffff)); /* ori reg, reg, value */
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}
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}
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| OP_LA GPR ',' expr
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{
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word_t reg = $2;
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word_t type = $4.typ & S_TYP;
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word_t val = $4.val;
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if (type != S_ABS)
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newrelo($4.typ, RELO2HI | FIXUPFLAGS);
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emit4(0x3c000000 | (reg<<16) | (val>>16)); /* lui reg, value */
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if (type != S_ABS)
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newrelo($4.typ, RELO2 | FIXUPFLAGS);
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emit4(0x34000000 | (reg<<16) | (reg<<21) | (val & 0xffff)); /* ori reg, reg, value */
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}
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extabsexp
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: absexp
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| LO16 ASC_LPAR expr ASC_RPAR
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{
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newrelo($3.typ, RELO2 | FIXUPFLAGS);
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$$ = $3.val;
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}
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| HI16 ASC_LPAR expr ASC_RPAR
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{
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newrelo($3.typ, RELO2HI | FIXUPFLAGS);
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if ($3.val & 0xffff0000)
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fatal("relocation offset in hi16[] too big");
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$$ = $3.val;
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}
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| HA16 ASC_LPAR expr ASC_RPAR
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{
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newrelo($3.typ, RELO2HISAD | FIXUPFLAGS);
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if ($3.val & 0xffff0000)
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fatal("relocation offset in ha16[] too big");
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$$ = $3.val;
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}
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;
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gpr: GPR
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fpr: FPR
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fmt3
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: OP__DOT_S { $$ = 0; }
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| OP__DOT_D { $$ = 1; }
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| OP__DOT_W { $$ = 4; }
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| OP__DOT_L { $$ = 5; }
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| OP__DOT_PS { $$ = 6; }
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;
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fmt
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: fmt3 { $$ = $1 + 16; }
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;
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fcond
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: OP__DOT_F { $$ = 0; }
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| OP__DOT_UN { $$ = 1; }
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| OP__DOT_EQ { $$ = 2; }
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| OP__DOT_UEQ { $$ = 3; }
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| OP__DOT_OLT { $$ = 4; }
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| OP__DOT_ULT { $$ = 5; }
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| OP__DOT_OLE { $$ = 6; }
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| OP__DOT_ULE { $$ = 7; }
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| OP__DOT_SF { $$ = 8; }
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| OP__DOT_NGLE { $$ = 9; }
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| OP__DOT_SEQ { $$ = 10; }
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| OP__DOT_NGL { $$ = 11; }
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| OP__DOT_LT { $$ = 12; }
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| OP__DOT_NGE { $$ = 13; }
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| OP__DOT_LE { $$ = 14; }
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| OP__DOT_NGT { $$ = 15; }
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;
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e16
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: extabsexp
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{
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/* Allow signed or unsigned 16-bit values. */
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if (($1 < -0x8000) || ($1 > 0xffff))
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serror("16-bit signed value out of range");
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$$ = (uint16_t) $1;
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}
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;
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e9
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: absexp
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{
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/* Allow signed or unsigned 9-bit values. */
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if (($1 < -0x100) || ($1 > 0x1ff))
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serror("9-bit signed value out of range");
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$$ = (uint16_t) $1;
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}
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;
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u25
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: absexp
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{
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if (($1 < 0) || ($1 > 0x1ffffff))
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serror("25-bit unsigned value out of range");
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$$ = $1;
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}
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;
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u20
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: absexp
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{
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if (($1 < 0) || ($1 > 0xfffff))
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serror("20-bit unsigned value out of range");
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$$ = $1;
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}
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;
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u16
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: extabsexp
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{
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if (($1 < 0) || ($1 > 0xffff))
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serror("16-bit unsigned value out of range");
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$$ = $1;
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}
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;
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u5
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: absexp
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{
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if (($1 < 0) || ($1 > 0x1f))
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serror("5-bit unsigned value out of range");
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$$ = $1;
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}
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;
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u3
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: absexp
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{
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if (($1 < 0) || ($1 > 0x7))
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serror("3-bit unsigned value out of range");
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$$ = $1;
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}
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;
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offset16
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: expr
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{
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int dist = $1.val - DOTVAL - 4;
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fit(fitx(dist, 18));
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if (dist & 0x3)
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serror("jump targets must be 4-aligned");
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newrelo($1.typ, RELOMIPS | RELPC | FIXUPFLAGS);
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$$ = (dist >> 2) & 0x0000ffff;
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}
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;
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abs26
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: expr
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{
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int target = $1.val;
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fit(fitx(target, 28));
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if (target & 0x3)
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serror("jump targets must be 4-aligned");
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newrelo($1.typ, RELOMIPS | FIXUPFLAGS);
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$$ = (target >> 2) & 0x03fffffd;
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}
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;
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extmsblsb
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: u5 ',' u5
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{
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int pos = $1;
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int size = $3;
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$$ = ((size-1) << 5) | pos;
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}
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;
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insmsblsb
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: u5 ',' u5
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{
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int pos = $1;
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int size = $3;
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$$ = ((pos+size-1) << 5) | pos;
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}
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; |