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target-ppc: add cmprb instruction 

ISA 3.0 Compare Ranged Byte instruction useful for
isupper/islower/isaplha kind of operation.

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Nikunj A Dadhania 2016-07-26 17:28:27 +05:30 committed by David Gibson
parent c5b2b9ce12
commit f2442ef93c
1 changed files with 39 additions and 0 deletions
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39
target-ppc/translate.c
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@ -817,6 +817,44 @@ static void gen_cmpli(DisasContext *ctx)
}
}
/* cmprb - range comparison: isupper, isaplha, islower*/
static void gen_cmprb(DisasContext *ctx)
{
TCGv_i32 src1 = tcg_temp_new_i32();
TCGv_i32 src2 = tcg_temp_new_i32();
TCGv_i32 src2lo = tcg_temp_new_i32();
TCGv_i32 src2hi = tcg_temp_new_i32();
TCGv_i32 crf = cpu_crf[crfD(ctx->opcode)];
tcg_gen_trunc_tl_i32(src1, cpu_gpr[rA(ctx->opcode)]);
tcg_gen_trunc_tl_i32(src2, cpu_gpr[rB(ctx->opcode)]);
tcg_gen_andi_i32(src1, src1, 0xFF);
tcg_gen_ext8u_i32(src2lo, src2);
tcg_gen_shri_i32(src2, src2, 8);
tcg_gen_ext8u_i32(src2hi, src2);
tcg_gen_setcond_i32(TCG_COND_LEU, src2lo, src2lo, src1);
tcg_gen_setcond_i32(TCG_COND_LEU, src2hi, src1, src2hi);
tcg_gen_and_i32(crf, src2lo, src2hi);
if (ctx->opcode & 0x00200000) {
tcg_gen_shri_i32(src2, src2, 8);
tcg_gen_ext8u_i32(src2lo, src2);
tcg_gen_shri_i32(src2, src2, 8);
tcg_gen_ext8u_i32(src2hi, src2);
tcg_gen_setcond_i32(TCG_COND_LEU, src2lo, src2lo, src1);
tcg_gen_setcond_i32(TCG_COND_LEU, src2hi, src1, src2hi);
tcg_gen_and_i32(src2lo, src2lo, src2hi);
tcg_gen_or_i32(crf, crf, src2lo);
}
tcg_gen_shli_i32(crf, crf, CRF_GT);
tcg_temp_free_i32(src1);
tcg_temp_free_i32(src2);
tcg_temp_free_i32(src2lo);
tcg_temp_free_i32(src2hi);
}
/* isel (PowerPC 2.03 specification) */
static void gen_isel(DisasContext *ctx)
{
@ -9897,6 +9935,7 @@ GEN_HANDLER(cmpi, 0x0B, 0xFF, 0xFF, 0x00400000, PPC_INTEGER),
GEN_HANDLER(cmpl, 0x1F, 0x00, 0x01, 0x00400000, PPC_INTEGER),
GEN_HANDLER(cmpli, 0x0A, 0xFF, 0xFF, 0x00400000, PPC_INTEGER),
GEN_HANDLER_E(cmpb, 0x1F, 0x1C, 0x0F, 0x00000001, PPC_NONE, PPC2_ISA205),
GEN_HANDLER_E(cmprb, 0x1F, 0x00, 0x06, 0x00400001, PPC_NONE, PPC2_ISA300),
GEN_HANDLER(isel, 0x1F, 0x0F, 0xFF, 0x00000001, PPC_ISEL),
GEN_HANDLER(addi, 0x0E, 0xFF, 0xFF, 0x00000000, PPC_INTEGER),
GEN_HANDLER(addic, 0x0C, 0xFF, 0xFF, 0x00000000, PPC_INTEGER),