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Fix bugs with tbnz/tbz instructions.

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sim/aarch64
	* simulator.c (tbnz, tbz): Cast 1 to uint64_t before shifting.
	(dexTestBranchImmediate): Shift high bit of pos by 5 not 4.
This commit is contained in:
Jim Wilson 2016-12-03 17:29:44 -08:00
parent 4132f1c0df
commit 668650d58d
2 changed files with 8 additions and 3 deletions
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5
sim/aarch64/ChangeLog
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@ -1,3 +1,8 @@
2016-12-03 Jim Wilson <jim.wilson@linaro.org>
* simulator.c (tbnz, tbz): Cast 1 to uint64_t before shifting.
(dexTestBranchImmediate): Shift high bit of pos by 5 not 4.
2016-12-01 Jim Wilson <jim.wilson@linaro.org>
* simulator.c (fsturs): Switch use of rn and st variables.

6
sim/aarch64/simulator.c
View File

@ -13353,7 +13353,7 @@ tbnz (sim_cpu *cpu, uint32_t pos, int32_t offset)
unsigned rt = INSTR (4, 0);
TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
if (aarch64_get_reg_u64 (cpu, rt, NO_SP) & (1 << pos))
if (aarch64_get_reg_u64 (cpu, rt, NO_SP) & (((uint64_t) 1) << pos))
aarch64_set_next_PC_by_offset (cpu, offset);
}
@ -13364,7 +13364,7 @@ tbz (sim_cpu *cpu, uint32_t pos, int32_t offset)
unsigned rt = INSTR (4, 0);
TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
if (!(aarch64_get_reg_u64 (cpu, rt, NO_SP) & (1 << pos)))
if (!(aarch64_get_reg_u64 (cpu, rt, NO_SP) & (((uint64_t) 1) << pos)))
aarch64_set_next_PC_by_offset (cpu, offset);
}
@ -13407,7 +13407,7 @@ dexTestBranchImmediate (sim_cpu *cpu)
instr[18,5] = simm14 : signed offset counted in words
instr[4,0] = uimm5 */
uint32_t pos = ((INSTR (31, 31) << 4) | INSTR (23, 19));
uint32_t pos = ((INSTR (31, 31) << 5) | INSTR (23, 19));
int32_t offset = simm32 (aarch64_get_instr (cpu), 18, 5) << 2;
NYI_assert (30, 25, 0x1b);