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DynASM/ARM64: Add VREG support.

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Contributed by Hao Sun and Nick Gasson.
This commit is contained in:
Mike Pall
2021-03-31 18:11:32 +02:00
parent 66563bdab0
commit d1132afb25
2 changed files with 41 additions and 18 deletions
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15
dynasm/dasm_arm64.h
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@@ -23,6 +23,7 @@ enum {
/* The following actions also have an argument. */
DASM_REL_PC, DASM_LABEL_PC,
DASM_IMM, DASM_IMM6, DASM_IMM12, DASM_IMM13W, DASM_IMM13X, DASM_IMML,
DASM_VREG,
DASM__MAX
};
@@ -39,6 +40,7 @@ enum {
#define DASM_S_RANGE_LG 0x13000000
#define DASM_S_RANGE_PC 0x14000000
#define DASM_S_RANGE_REL 0x15000000
#define DASM_S_RANGE_VREG 0x16000000
#define DASM_S_UNDEF_LG 0x21000000
#define DASM_S_UNDEF_PC 0x22000000
@@ -312,13 +314,17 @@ void dasm_put(Dst_DECL, int start, ...)
}
case DASM_IMML: {
#ifdef DASM_CHECKS
int scale = (p[-2] >> 30);
int scale = (ins & 3);
CK((!(n & ((1<<scale)-1)) && (unsigned int)(n>>scale) < 4096) ||
(unsigned int)(n+256) < 512, RANGE_I);
#endif
b[pos++] = n;
break;
}
case DASM_VREG:
CK(n < 32, RANGE_VREG);
b[pos++] = n;
break;
}
}
}
@@ -375,7 +381,7 @@ int dasm_link(Dst_DECL, size_t *szp)
case DASM_REL_LG: case DASM_REL_PC: pos++; break;
case DASM_LABEL_LG: case DASM_LABEL_PC: b[pos++] += ofs; break;
case DASM_IMM: case DASM_IMM6: case DASM_IMM12: case DASM_IMM13W:
case DASM_IMML: pos++; break;
case DASM_IMML: case DASM_VREG: pos++; break;
case DASM_IMM13X: pos += 2; break;
}
}
@@ -468,11 +474,14 @@ int dasm_encode(Dst_DECL, void *buffer)
cp[-1] |= (dasm_imm13(n, *b++) << 10);
break;
case DASM_IMML: {
int scale = (p[-2] >> 30);
int scale = (ins & 3);
cp[-1] |= (!(n & ((1<<scale)-1)) && (unsigned int)(n>>scale) < 4096) ?
((n << (10-scale)) | 0x01000000) : ((n & 511) << 12);
break;
}
case DASM_VREG:
cp[-1] |= (n & 0x1f) << (ins & 0x1f);
break;
default: *cp++ = ins; break;
}
}