aboutsummaryrefslogtreecommitdiff
path: root/sim
diff options
context:
space:
mode:
authorJames Bowman <jamesb@excamera.com>2017-11-01 18:34:25 -0700
committerJames Bowman <jamesb@excamera.com>2017-11-01 18:36:51 -0700
commitdcc31d286ad05aa93577181f9a8292009622363e (patch)
treef455afb6e8e5f4ff9c702fa00d129091f94e9be5 /sim
parent89f3c4b6b9b565720f88636d966f22923c03e9cb (diff)
downloadgdb-dcc31d286ad05aa93577181f9a8292009622363e.zip
gdb-dcc31d286ad05aa93577181f9a8292009622363e.tar.gz
gdb-dcc31d286ad05aa93577181f9a8292009622363e.tar.bz2
FT32: support for FT32B processor - part 2/2
FT32B is a new FT32 family member. This patch adds support for the compressed instructions to gdb and sim. gdb/ChangeLog: * ft32-tdep.c (ft32_fetch_instruction): New function. (ft32_analyze_prologue): Use ft32_fetch_instruction(). sim/ChangeLog: * ft32/interp.c (step_once): Add ft32 shortcode decoder.
Diffstat (limited to 'sim')
-rw-r--r--sim/ChangeLog4
-rw-r--r--sim/ft32/interp.c22
2 files changed, 19 insertions, 7 deletions
diff --git a/sim/ChangeLog b/sim/ChangeLog
index c39cf2d..3c1a351 100644
--- a/sim/ChangeLog
+++ b/sim/ChangeLog
@@ -1,3 +1,7 @@
+2017-11-01 James Bowman <james.bowman@ftdichip.com>
+
+ * ft32/interp.c (step_once): Add ft32 shortcode decoder.
+
2017-10-12 James Bowman <james.bowman@ftdichip.com>
* ft32/interp.c (step_once): Replace FT32_FLD_K8 with K15.
diff --git a/sim/ft32/interp.c b/sim/ft32/interp.c
index 3bc08ee..d73d4d0 100644
--- a/sim/ft32/interp.c
+++ b/sim/ft32/interp.c
@@ -340,16 +340,24 @@ step_once (SIM_DESC sd)
uint32_t bit_len;
uint32_t upper;
uint32_t insnpc;
+ unsigned int sc[2];
+ int isize;
- if (cpu->state.cycles >= cpu->state.next_tick_cycle)
- {
- cpu->state.next_tick_cycle += 100000;
- ft32_push (sd, cpu->state.pc);
- cpu->state.pc = 12; /* interrupt 1. */
- }
inst = ft32_read_item (sd, 2, cpu->state.pc);
cpu->state.cycles += 1;
+ if ((STATE_ARCHITECTURE (sd)->mach == bfd_mach_ft32b)
+ && ft32_decode_shortcode (cpu->state.pc, inst, sc))
+ {
+ if ((cpu->state.pc & 3) == 0)
+ inst = sc[0];
+ else
+ inst = sc[1];
+ isize = 2;
+ }
+ else
+ isize = 4;
+
/* Handle "call 8" (which is FT32's "break" equivalent) here. */
if (inst == 0x00340002)
{
@@ -390,7 +398,7 @@ step_once (SIM_DESC sd)
upper = (inst >> 27);
insnpc = cpu->state.pc;
- cpu->state.pc += 4;
+ cpu->state.pc += isize;
switch (upper)
{
case FT32_PAT_TOC: