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author | Laurent Vivier <laurent@vivier.eu> | 2017-06-28 22:42:35 +0200 |
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committer | Laurent Vivier <laurent@vivier.eu> | 2017-06-29 20:25:17 +0200 |
commit | dd337bf86214e2436833d9442c995df95b136190 (patch) | |
tree | 39124ad6ee8bda015837e670f9ad4f7c3aa64927 /target/m68k | |
parent | 4c8c1cc544dbd5e2564868e61c5037258e393832 (diff) | |
download | qemu-dd337bf86214e2436833d9442c995df95b136190.zip qemu-dd337bf86214e2436833d9442c995df95b136190.tar.gz qemu-dd337bf86214e2436833d9442c995df95b136190.tar.bz2 |
target/m68k: add fscc.
use DisasCompare with FPU conditions in fscc and fbcc.
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170628204241.32106-2-laurent@vivier.eu>
Diffstat (limited to 'target/m68k')
-rw-r--r-- | target/m68k/translate.c | 210 |
1 files changed, 131 insertions, 79 deletions
diff --git a/target/m68k/translate.c b/target/m68k/translate.c index 7aa0fdc..5f4bedc 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -4633,142 +4633,193 @@ undef: disas_undef_fpu(env, s, insn); } -DISAS_INSN(fbcc) +static void gen_fcc_cond(DisasCompare *c, DisasContext *s, int cond) { - uint32_t offset; - uint32_t addr; - TCGLabel *l1; - TCGv tmp, fpsr; - - addr = s->pc; - offset = cpu_ldsw_code(env, s->pc); - s->pc += 2; - if (insn & (1 << 6)) { - offset = (offset << 16) | read_im16(env, s); - } + TCGv fpsr; + c->g1 = 1; + c->v2 = tcg_const_i32(0); + c->g2 = 0; + /* TODO: Raise BSUN exception. */ fpsr = tcg_temp_new(); gen_load_fcr(s, fpsr, M68K_FPSR); - l1 = gen_new_label(); - /* TODO: Raise BSUN exception. */ - /* Jump to l1 if condition is true. */ - switch (insn & 0x3f) { + switch (cond) { case 0: /* False */ case 16: /* Signaling False */ + c->v1 = c->v2; + c->tcond = TCG_COND_NEVER; break; case 1: /* EQual Z */ case 17: /* Signaling EQual Z */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_Z); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); + c->tcond = TCG_COND_NE; break; case 2: /* Ordered Greater Than !(A || Z || N) */ case 18: /* Greater Than !(A || Z || N) */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); - tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + c->tcond = TCG_COND_EQ; break; case 3: /* Ordered Greater than or Equal Z || !(A || N) */ case 19: /* Greater than or Equal Z || !(A || N) */ - assert(FPSR_CC_A == (FPSR_CC_N >> 3)); - tmp = tcg_temp_new(); - tcg_gen_shli_i32(tmp, fpsr, 3); - tcg_gen_or_i32(tmp, tmp, fpsr); - tcg_gen_xori_i32(tmp, tmp, FPSR_CC_N); - tcg_gen_andi_i32(tmp, tmp, FPSR_CC_N | FPSR_CC_Z); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); + tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A)); + tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_Z | FPSR_CC_N); + tcg_gen_or_i32(c->v1, c->v1, fpsr); + tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N); + c->tcond = TCG_COND_NE; break; case 4: /* Ordered Less Than !(!N || A || Z); */ case 20: /* Less Than !(!N || A || Z); */ - tmp = tcg_temp_new(); - tcg_gen_xori_i32(tmp, fpsr, FPSR_CC_N); - tcg_gen_andi_i32(tmp, tmp, FPSR_CC_N | FPSR_CC_A | FPSR_CC_Z); - tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_xori_i32(c->v1, fpsr, FPSR_CC_N); + tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_N | FPSR_CC_A | FPSR_CC_Z); + c->tcond = TCG_COND_EQ; break; case 5: /* Ordered Less than or Equal Z || (N && !A) */ case 21: /* Less than or Equal Z || (N && !A) */ - assert(FPSR_CC_A == (FPSR_CC_N >> 3)); - tmp = tcg_temp_new(); - tcg_gen_xori_i32(tmp, fpsr, FPSR_CC_A); - tcg_gen_shli_i32(tmp, tmp, 3); - tcg_gen_ori_i32(tmp, tmp, FPSR_CC_Z); - tcg_gen_and_i32(tmp, tmp, fpsr); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); + tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_A)); + tcg_gen_andc_i32(c->v1, fpsr, c->v1); + tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_Z | FPSR_CC_N); + c->tcond = TCG_COND_NE; break; case 6: /* Ordered Greater or Less than !(A || Z) */ case 22: /* Greater or Less than !(A || Z) */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_A | FPSR_CC_Z); - tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z); + c->tcond = TCG_COND_EQ; break; case 7: /* Ordered !A */ case 23: /* Greater, Less or Equal !A */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_A); - tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); + c->tcond = TCG_COND_EQ; break; case 8: /* Unordered A */ case 24: /* Not Greater, Less or Equal A */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_A); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A); + c->tcond = TCG_COND_NE; break; case 9: /* Unordered or Equal A || Z */ case 25: /* Not Greater or Less then A || Z */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_A | FPSR_CC_Z); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z); + c->tcond = TCG_COND_NE; break; case 10: /* Unordered or Greater Than A || !(N || Z)) */ case 26: /* Not Less or Equal A || !(N || Z)) */ - assert(FPSR_CC_Z == (FPSR_CC_N >> 1)); - tmp = tcg_temp_new(); - tcg_gen_shli_i32(tmp, fpsr, 1); - tcg_gen_or_i32(tmp, tmp, fpsr); - tcg_gen_xori_i32(tmp, tmp, FPSR_CC_N); - tcg_gen_andi_i32(tmp, tmp, FPSR_CC_N | FPSR_CC_A); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); + tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z)); + tcg_gen_andi_i32(fpsr, fpsr, FPSR_CC_A | FPSR_CC_N); + tcg_gen_or_i32(c->v1, c->v1, fpsr); + tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N); + c->tcond = TCG_COND_NE; break; case 11: /* Unordered or Greater or Equal A || Z || !N */ case 27: /* Not Less Than A || Z || !N */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); - tcg_gen_xori_i32(tmp, tmp, FPSR_CC_N); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); + tcg_gen_xori_i32(c->v1, c->v1, FPSR_CC_N); + c->tcond = TCG_COND_NE; break; case 12: /* Unordered or Less Than A || (N && !Z) */ case 28: /* Not Greater than or Equal A || (N && !Z) */ - assert(FPSR_CC_Z == (FPSR_CC_N >> 1)); - tmp = tcg_temp_new(); - tcg_gen_xori_i32(tmp, fpsr, FPSR_CC_Z); - tcg_gen_shli_i32(tmp, tmp, 1); - tcg_gen_ori_i32(tmp, tmp, FPSR_CC_A); - tcg_gen_and_i32(tmp, tmp, fpsr); - tcg_gen_andi_i32(tmp, tmp, FPSR_CC_A | FPSR_CC_N); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); + tcg_gen_shli_i32(c->v1, c->v1, ctz32(FPSR_CC_N) - ctz32(FPSR_CC_Z)); + tcg_gen_andc_i32(c->v1, fpsr, c->v1); + tcg_gen_andi_i32(c->v1, c->v1, FPSR_CC_A | FPSR_CC_N); + c->tcond = TCG_COND_NE; break; case 13: /* Unordered or Less or Equal A || Z || N */ case 29: /* Not Greater Than A || Z || N */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); - tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_A | FPSR_CC_Z | FPSR_CC_N); + c->tcond = TCG_COND_NE; break; case 14: /* Not Equal !Z */ case 30: /* Signaling Not Equal !Z */ - tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, fpsr, FPSR_CC_Z); - tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + c->v1 = tcg_temp_new(); + c->g1 = 0; + tcg_gen_andi_i32(c->v1, fpsr, FPSR_CC_Z); + c->tcond = TCG_COND_EQ; break; case 15: /* True */ case 31: /* Signaling True */ - tcg_gen_br(l1); + c->v1 = c->v2; + c->tcond = TCG_COND_ALWAYS; break; } tcg_temp_free(fpsr); +} + +static void gen_fjmpcc(DisasContext *s, int cond, TCGLabel *l1) +{ + DisasCompare c; + + gen_fcc_cond(&c, s, cond); + tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1); + free_cond(&c); +} + +DISAS_INSN(fbcc) +{ + uint32_t offset; + uint32_t base; + TCGLabel *l1; + + base = s->pc; + offset = (int16_t)read_im16(env, s); + if (insn & (1 << 6)) { + offset = (offset << 16) | read_im16(env, s); + } + + l1 = gen_new_label(); + update_cc_op(s); + gen_fjmpcc(s, insn & 0x3f, l1); gen_jmp_tb(s, 0, s->pc); gen_set_label(l1); - gen_jmp_tb(s, 1, addr + offset); + gen_jmp_tb(s, 1, base + offset); +} + +DISAS_INSN(fscc) +{ + DisasCompare c; + int cond; + TCGv tmp; + uint16_t ext; + + ext = read_im16(env, s); + cond = ext & 0x3f; + gen_fcc_cond(&c, s, cond); + + tmp = tcg_temp_new(); + tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2); + free_cond(&c); + + tcg_gen_neg_i32(tmp, tmp); + DEST_EA(env, insn, OS_BYTE, tmp, NULL); + tcg_temp_free(tmp); } DISAS_INSN(frestore) @@ -5349,6 +5400,7 @@ void register_m68k_insns (CPUM68KState *env) INSN(frestore, f340, ffc0, CF_FPU); INSN(fsave, f300, ffc0, CF_FPU); INSN(fpu, f200, ffc0, FPU); + INSN(fscc, f240, ffc0, FPU); INSN(fbcc, f280, ff80, FPU); INSN(frestore, f340, ffc0, FPU); INSN(fsave, f300, ffc0, FPU); |