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Diffstat (limited to 'opcodes/ppc-opc.c')
-rw-r--r--opcodes/ppc-opc.c160
1 files changed, 69 insertions, 91 deletions
diff --git a/opcodes/ppc-opc.c b/opcodes/ppc-opc.c
index ced449a..02d9872 100644
--- a/opcodes/ppc-opc.c
+++ b/opcodes/ppc-opc.c
@@ -563,8 +563,7 @@ extract_bat (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
int *invalid)
{
- if (invalid != NULL
- && ((insn >> 21) & 0x1f) != ((insn >> 16) & 0x1f))
+ if (((insn >> 21) & 0x1f) != ((insn >> 16) & 0x1f))
*invalid = 1;
return 0;
}
@@ -590,8 +589,7 @@ extract_bba (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
int *invalid)
{
- if (invalid != NULL
- && ((insn >> 16) & 0x1f) != ((insn >> 11) & 0x1f))
+ if (((insn >> 16) & 0x1f) != ((insn >> 11) & 0x1f))
*invalid = 1;
return 0;
}
@@ -658,20 +656,18 @@ extract_bdm (unsigned long insn,
int dialect,
int *invalid)
{
- if (invalid != NULL)
+ if ((dialect & PPC_OPCODE_POWER4) == 0)
{
- if ((dialect & PPC_OPCODE_POWER4) == 0)
- {
- if (((insn & (1 << 21)) == 0) != ((insn & (1 << 15)) == 0))
- *invalid = 1;
- }
- else
- {
- if ((insn & (0x17 << 21)) != (0x06 << 21)
- && (insn & (0x1d << 21)) != (0x18 << 21))
- *invalid = 1;
- }
+ if (((insn & (1 << 21)) == 0) != ((insn & (1 << 15)) == 0))
+ *invalid = 1;
}
+ else
+ {
+ if ((insn & (0x17 << 21)) != (0x06 << 21)
+ && (insn & (0x1d << 21)) != (0x18 << 21))
+ *invalid = 1;
+ }
+
return ((insn & 0xfffc) ^ 0x8000) - 0x8000;
}
@@ -706,20 +702,18 @@ extract_bdp (unsigned long insn,
int dialect,
int *invalid)
{
- if (invalid != NULL)
+ if ((dialect & PPC_OPCODE_POWER4) == 0)
{
- if ((dialect & PPC_OPCODE_POWER4) == 0)
- {
- if (((insn & (1 << 21)) == 0) == ((insn & (1 << 15)) == 0))
- *invalid = 1;
- }
- else
- {
- if ((insn & (0x17 << 21)) != (0x07 << 21)
- && (insn & (0x1d << 21)) != (0x19 << 21))
- *invalid = 1;
- }
+ if (((insn & (1 << 21)) == 0) == ((insn & (1 << 15)) == 0))
+ *invalid = 1;
+ }
+ else
+ {
+ if ((insn & (0x17 << 21)) != (0x07 << 21)
+ && (insn & (0x1d << 21)) != (0x19 << 21))
+ *invalid = 1;
}
+
return ((insn & 0xfffc) ^ 0x8000) - 0x8000;
}
@@ -783,8 +777,7 @@ insert_bo (unsigned long insn,
int dialect,
const char **errmsg)
{
- if (errmsg != NULL
- && ! valid_bo (value, dialect))
+ if (!valid_bo (value, dialect))
*errmsg = _("invalid conditional option");
return insn | ((value & 0x1f) << 21);
}
@@ -797,8 +790,7 @@ extract_bo (unsigned long insn,
long value;
value = (insn >> 21) & 0x1f;
- if (invalid != NULL
- && ! valid_bo (value, dialect))
+ if (!valid_bo (value, dialect))
*invalid = 1;
return value;
}
@@ -813,13 +805,11 @@ insert_boe (unsigned long insn,
int dialect,
const char **errmsg)
{
- if (errmsg != NULL)
- {
- if (! valid_bo (value, dialect))
- *errmsg = _("invalid conditional option");
- else if ((value & 1) != 0)
- *errmsg = _("attempt to set y bit when using + or - modifier");
- }
+ if (!valid_bo (value, dialect))
+ *errmsg = _("invalid conditional option");
+ else if ((value & 1) != 0)
+ *errmsg = _("attempt to set y bit when using + or - modifier");
+
return insn | ((value & 0x1f) << 21);
}
@@ -831,23 +821,22 @@ extract_boe (unsigned long insn,
long value;
value = (insn >> 21) & 0x1f;
- if (invalid != NULL
- && ! valid_bo (value, dialect))
+ if (!valid_bo (value, dialect))
*invalid = 1;
return value & 0x1e;
}
- /* The DQ field in a DQ form instruction. This is like D, but the
- lower four bits are forced to zero. */
+/* The DQ field in a DQ form instruction. This is like D, but the
+ lower four bits are forced to zero. */
/*ARGSUSED*/
static unsigned long
insert_dq (unsigned long insn,
long value,
int dialect ATTRIBUTE_UNUSED,
- const char ** errmsg ATTRIBUTE_UNUSED)
+ const char **errmsg)
{
- if ((value & 0xf) != 0 && errmsg != NULL)
+ if ((value & 0xf) != 0)
*errmsg = _("offset not a multiple of 16");
return insn | (value & 0xfff0);
}
@@ -865,11 +854,11 @@ static unsigned long
insert_ev2 (unsigned long insn,
long value,
int dialect ATTRIBUTE_UNUSED,
- const char ** errmsg ATTRIBUTE_UNUSED)
+ const char **errmsg)
{
- if ((value & 1) != 0 && errmsg != NULL)
+ if ((value & 1) != 0)
*errmsg = _("offset not a multiple of 2");
- if ((value > 62) != 0 && errmsg != NULL)
+ if ((value > 62) != 0)
*errmsg = _("offset greater than 62");
return insn | ((value & 0x3e) << 10);
}
@@ -886,11 +875,11 @@ static unsigned long
insert_ev4 (unsigned long insn,
long value,
int dialect ATTRIBUTE_UNUSED,
- const char **errmsg ATTRIBUTE_UNUSED)
+ const char **errmsg)
{
- if ((value & 3) != 0 && errmsg != NULL)
+ if ((value & 3) != 0)
*errmsg = _("offset not a multiple of 4");
- if ((value > 124) != 0 && errmsg != NULL)
+ if ((value > 124) != 0)
*errmsg = _("offset greater than 124");
return insn | ((value & 0x7c) << 9);
}
@@ -907,11 +896,11 @@ static unsigned long
insert_ev8 (unsigned long insn,
long value,
int dialect ATTRIBUTE_UNUSED,
- const char **errmsg ATTRIBUTE_UNUSED)
+ const char **errmsg)
{
- if ((value & 7) != 0 && errmsg != NULL)
+ if ((value & 7) != 0)
*errmsg = _("offset not a multiple of 8");
- if ((value > 248) != 0 && errmsg != NULL)
+ if ((value > 248) != 0)
*errmsg = _("offset greater than 248");
return insn | ((value & 0xf8) << 8);
}
@@ -919,7 +908,7 @@ insert_ev8 (unsigned long insn,
static long
extract_ev8 (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
- int * invalid ATTRIBUTE_UNUSED)
+ int *invalid ATTRIBUTE_UNUSED)
{
return (insn >> 8) & 0xf8;
}
@@ -934,7 +923,7 @@ insert_ds (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
const char **errmsg)
{
- if ((value & 3) != 0 && errmsg != NULL)
+ if ((value & 3) != 0)
*errmsg = _("offset not a multiple of 4");
return insn | (value & 0xfffc);
}
@@ -957,7 +946,7 @@ insert_de (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
const char **errmsg)
{
- if ((value > 2047 || value < -2048) && errmsg != NULL)
+ if (value > 2047 || value < -2048)
*errmsg = _("offset not between -2048 and 2047");
return insn | ((value << 4) & 0xfff0);
}
@@ -980,9 +969,9 @@ insert_des (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
const char **errmsg)
{
- if ((value > 8191 || value < -8192) && errmsg != NULL)
+ if (value > 8191 || value < -8192)
*errmsg = _("offset not between -8192 and 8191");
- else if ((value & 3) != 0 && errmsg != NULL)
+ else if ((value & 3) != 0)
*errmsg = _("offset not a multiple of 4");
return insn | ((value << 2) & 0xfff0);
}
@@ -1019,8 +1008,7 @@ insert_fxm (unsigned long insn,
/* Any other value on mfcr is an error. */
else if ((insn & (0x3ff << 1)) == 19 << 1)
{
- if (errmsg != NULL)
- *errmsg = _("ignoring invalid mfcr mask");
+ *errmsg = _("ignoring invalid mfcr mask");
value = 0;
}
@@ -1038,14 +1026,11 @@ extract_fxm (unsigned long insn,
if ((insn & (1 << 20)) != 0)
{
if ((dialect & PPC_OPCODE_POWER4) == 0)
- {
- if (invalid != NULL)
- *invalid = 1;
- }
+ *invalid = 1;
else
{
/* Exactly one bit of MASK should be set. */
- if ((mask == 0 || (mask & -mask) != mask) && invalid != NULL)
+ if (mask == 0 || (mask & -mask) != mask)
*invalid = 1;
}
}
@@ -1053,7 +1038,7 @@ extract_fxm (unsigned long insn,
/* Check that non-power4 form of mfcr has a zero MASK. */
else if ((insn & (0x3ff << 1)) == 19 << 1)
{
- if (mask != 0 && invalid != NULL)
+ if (mask != 0)
*invalid = 1;
}
@@ -1070,7 +1055,7 @@ insert_li (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
const char **errmsg)
{
- if ((value & 3) != 0 && errmsg != NULL)
+ if ((value & 3) != 0)
*errmsg = _("ignoring least significant bits in branch offset");
return insn | (value & 0x3fffffc);
}
@@ -1102,8 +1087,7 @@ insert_mbe (unsigned long insn,
if (uval == 0)
{
- if (errmsg != NULL)
- *errmsg = _("illegal bitmask");
+ *errmsg = _("illegal bitmask");
return insn;
}
@@ -1138,10 +1122,7 @@ insert_mbe (unsigned long insn,
me = 32;
if (count != 2 && (count != 0 || ! last))
- {
- if (errmsg != NULL)
- *errmsg = _("illegal bitmask");
- }
+ *errmsg = _("illegal bitmask");
return insn | (mb << 6) | ((me - 1) << 1);
}
@@ -1155,8 +1136,7 @@ extract_mbe (unsigned long insn,
int mb, me;
int i;
- if (invalid != NULL)
- *invalid = 1;
+ *invalid = 1;
mb = (insn >> 6) & 0x1f;
me = (insn >> 1) & 0x1f;
@@ -1167,12 +1147,12 @@ extract_mbe (unsigned long insn,
ret |= 1 << (31 - i);
}
else if (mb == me + 1)
- ret = -1;
+ ret = ~0;
else /* (mb > me + 1) */
{
ret = ~0;
for (i = me + 1; i < mb; i++)
- ret &= ~ (1 << (31 - i));
+ ret &= ~(1 << (31 - i));
}
return ret;
}
@@ -1249,8 +1229,7 @@ extract_nsi (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
int *invalid)
{
- if (invalid != NULL)
- *invalid = 1;
+ *invalid = 1;
return -(((insn & 0xffff) ^ 0x8000) - 0x8000);
}
@@ -1284,8 +1263,8 @@ insert_ram (unsigned long insn,
return insn | ((value & 0x1f) << 16);
}
- /* The RA field in the DQ form lq instruction, which has special
- value restrictions. */
+/* The RA field in the DQ form lq instruction, which has special
+ value restrictions. */
/*ARGSUSED*/
static unsigned long
@@ -1296,7 +1275,7 @@ insert_raq (unsigned long insn,
{
long rtvalue = (insn & RT_MASK) >> 21;
- if (value == rtvalue && errmsg != NULL)
+ if (value == rtvalue)
*errmsg = _("source and target register operands must be different");
return insn | ((value & 0x1f) << 16);
}
@@ -1337,14 +1316,13 @@ extract_rbs (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
int *invalid)
{
- if (invalid != NULL
- && ((insn >> 21) & 0x1f) != ((insn >> 11) & 0x1f))
+ if (((insn >> 21) & 0x1f) != ((insn >> 11) & 0x1f))
*invalid = 1;
return 0;
}
- /* The RT field of the DQ form lq instruction, which has special
- value restrictions. */
+/* The RT field of the DQ form lq instruction, which has special
+ value restrictions. */
/*ARGSUSED*/
static unsigned long
@@ -1353,13 +1331,13 @@ insert_rtq (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
const char **errmsg)
{
- if ((value & 1) != 0 && errmsg != NULL)
+ if ((value & 1) != 0)
*errmsg = _("target register operand must be even");
return insn | ((value & 0x1f) << 21);
}
- /* The RS field of the DS form stq instruction, which has special
- value restrictions. */
+/* The RS field of the DS form stq instruction, which has special
+ value restrictions. */
/*ARGSUSED*/
static unsigned long
@@ -1368,7 +1346,7 @@ insert_rsq (unsigned long insn,
int dialect ATTRIBUTE_UNUSED,
const char **errmsg)
{
- if ((value & 1) != 0 && errmsg != NULL)
+ if ((value & 1) != 0)
*errmsg = _("source register operand must be even");
return insn | ((value & 0x1f) << 21);
}
generated by cgit v1.1 at 2024-12-22 10:26:08 +0000