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target-microblaze: impelemented swapx instructions

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Implemented the swapb and swaph byte/halfword reversal instructions added
to microblaze v8.30

Signed-off-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Peter A. G. Crosthwaite 2012-05-17 15:37:49 +10:00 committed by Edgar E. Iglesias
parent 76ee152a86
commit ace2e4dad7
1 changed files with 11 additions and 1 deletions
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12
target-microblaze/translate.c
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@ -743,7 +743,7 @@ static void dec_bit(DisasContext *dc)
unsigned int op; unsigned int op;
int mem_index = cpu_mmu_index(dc->env); int mem_index = cpu_mmu_index(dc->env);
op = dc->ir & ((1 << 8) - 1); op = dc->ir & ((1 << 9) - 1);
switch (op) { switch (op) {
case 0x21: case 0x21:
/* src. */ /* src. */
@ -825,6 +825,16 @@ static void dec_bit(DisasContext *dc)
gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]); gen_helper_clz(cpu_R[dc->rd], cpu_R[dc->ra]);
} }
break; break;
case 0x1e0:
/* swapb */
LOG_DIS("swapb r%d r%d\n", dc->rd, dc->ra);
tcg_gen_bswap32_i32(cpu_R[dc->rd], cpu_R[dc->ra]);
break;
case 0x1e1:
/*swaph */
LOG_DIS("swaph r%d r%d\n", dc->rd, dc->ra);
tcg_gen_rotri_i32(cpu_R[dc->rd], cpu_R[dc->ra], 16);
break;
default: default:
cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n", cpu_abort(dc->env, "unknown bit oc=%x op=%x rd=%d ra=%d rb=%d\n",
dc->pc, op, dc->rd, dc->ra, dc->rb); dc->pc, op, dc->rd, dc->ra, dc->rb);