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target-tricore: add FRET instructions of the v1.6 ISA

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Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Bastian Koppelmann 2015-05-07 22:46:50 +02:00
parent 9e14a7b24f
commit 0e045f43c4
2 changed files with 21 additions and 0 deletions
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19
target-tricore/translate.c
View file

@ -3287,6 +3287,20 @@ static void gen_fcall_save_ctx(DisasContext *ctx)
tcg_temp_free(temp);
}
static void gen_fret(DisasContext *ctx)
{
TCGv temp = tcg_temp_new();
tcg_gen_andi_tl(temp, cpu_gpr_a[11], ~0x1);
tcg_gen_qemu_ld_tl(cpu_gpr_a[11], cpu_gpr_a[10], ctx->mem_idx, MO_LESL);
tcg_gen_addi_tl(cpu_gpr_a[10], cpu_gpr_a[10], 4);
tcg_gen_mov_tl(cpu_PC, temp);
tcg_gen_exit_tb(0);
ctx->bstate = BS_BRANCH;
tcg_temp_free(temp);
}
static void gen_compute_branch(DisasContext *ctx, uint32_t opc, int r1,
int r2 , int32_t constant , int32_t offset)
{
@ -3869,6 +3883,8 @@ static void decode_sr_system(CPUTriCoreState *env, DisasContext *ctx)
case OPC2_16_SR_DEBUG:
/* raise EXCP_DEBUG */
break;
case OPC2_16_SR_FRET:
gen_fret(ctx);
}
}
@ -7842,6 +7858,9 @@ static void decode_sys_interrupts(CPUTriCoreState *env, DisasContext *ctx)
case OPC2_32_SYS_RET:
gen_compute_branch(ctx, op2, 0, 0, 0, 0);
break;
case OPC2_32_SYS_FRET:
gen_fret(ctx);
break;
case OPC2_32_SYS_RFE:
gen_helper_rfe(cpu_env);
tcg_gen_exit_tb(0);

2
target-tricore/tricore-opcodes.h
View file

@ -399,6 +399,7 @@ enum {
OPC2_16_SR_RET = 0x09,
OPC2_16_SR_RFE = 0x08,
OPC2_16_SR_DEBUG = 0x0a,
OPC2_16_SR_FRET = 0x07,
};
/* OPCM_16_SR_ACCU */
enum {
@ -1438,4 +1439,5 @@ enum {
OPC2_32_SYS_TRAPSV = 0x15,
OPC2_32_SYS_TRAPV = 0x14,
OPC2_32_SYS_RESTORE = 0x0e,
OPC2_32_SYS_FRET = 0x03,
};