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[RFC,v1,14/29] target-arc: MPY, MPYH, MPYHU, MPYU

Message ID 1473373930-31547-15-git-send-email-mrolnik@gmail.com
State New
Headers show

Commit Message

Michael Rolnik Sept. 8, 2016, 10:31 p.m. UTC 
Signed-off-by: Michael Rolnik <mrolnik@gmail.com>
---
 target-arc/translate-inst.c | 129 ++++++++++++++++++++++++++++++++++++++++++++
 target-arc/translate-inst.h |   5 ++
 2 files changed, 134 insertions(+)

Comments

Richard Henderson Sept. 21, 2016, 12:17 a.m. UTC | #1 
On 09/08/2016 03:31 PM, Michael Rolnik wrote:
> +    tcg_gen_ext_i32_i64(srcA, src1);
> +    tcg_gen_ext_i32_i64(srcB, src2);
> +
> +    tcg_gen_mul_i64(rslt, srcA, srcB);
> +
> +    tcg_gen_trunc_i64_tl(dest, rslt);
> +
> +    if (ctx->opt.f) {
> +        TCGv_i64 temp = tcg_temp_new_i64();
> +
> +        tcg_gen_setcond_tl(TCG_COND_EQ, cpu_Zf, dest, ctx->zero);
> +
> +        tcg_gen_trunc_i64_tl(cpu_Nf, rslt);
> +        tcg_gen_shri_tl(cpu_Nf, cpu_Nf, 31);
> +
> +        tcg_gen_ext_i32_i64(temp, dest);
> +        tcg_gen_setcond_i64(TCG_COND_NE, temp, temp, rslt);
> +        tcg_gen_trunc_i64_tl(cpu_Cf, temp);
> +
> +        tcg_temp_free_i64(temp);
> +    }

It's probably easier to do this with tcg_gen_muls2_tl.


r~
diff mbox

Patch

diff --git a/target-arc/translate-inst.c b/target-arc/translate-inst.c
index 00785bf..92c75ac 100644
--- a/target-arc/translate-inst.c
+++ b/target-arc/translate-inst.c
@@ -1417,3 +1417,132 @@  int arc_gen_NORM(DisasCtxt *ctx, TCGv dest, TCGv src1)
     return BS_NONE;
 }
 
+/*
+    MPY
+*/
+int arc_gen_MPY(DisasCtxt *ctx, TCGv dest, TCGv src1, TCGv src2)
+{
+    TCGv_i64 rslt = tcg_temp_new_i64();
+    TCGv_i64 srcA = tcg_temp_new_i64();
+    TCGv_i64 srcB = tcg_temp_new_i64();
+
+    tcg_gen_ext_i32_i64(srcA, src1);
+    tcg_gen_ext_i32_i64(srcB, src2);
+
+    tcg_gen_mul_i64(rslt, srcA, srcB);
+
+    tcg_gen_trunc_i64_tl(dest, rslt);
+
+    if (ctx->opt.f) {
+        TCGv_i64 temp = tcg_temp_new_i64();
+
+        tcg_gen_setcond_tl(TCG_COND_EQ, cpu_Zf, dest, ctx->zero);
+
+        tcg_gen_trunc_i64_tl(cpu_Nf, rslt);
+        tcg_gen_shri_tl(cpu_Nf, cpu_Nf, 31);
+
+        tcg_gen_ext_i32_i64(temp, dest);
+        tcg_gen_setcond_i64(TCG_COND_NE, temp, temp, rslt);
+        tcg_gen_trunc_i64_tl(cpu_Cf, temp);
+
+        tcg_temp_free_i64(temp);
+    }
+
+    tcg_temp_free_i64(rslt);
+    tcg_temp_free_i64(srcA);
+    tcg_temp_free_i64(srcB);
+
+    return BS_NONE;
+}
+
+/*
+    MPYH
+*/
+int arc_gen_MPYH(DisasCtxt *ctx, TCGv dest, TCGv src1, TCGv src2)
+{
+    TCGv_i64    rslt = tcg_temp_new_i64();
+    TCGv_i64    srcA = tcg_temp_new_i64();
+    TCGv_i64    srcB = tcg_temp_new_i64();
+
+    tcg_gen_ext_i32_i64(srcA, src1);
+    tcg_gen_ext_i32_i64(srcB, src2);
+
+    tcg_gen_mul_i64(rslt, srcA, srcB);
+
+    tcg_gen_sari_i64(rslt, rslt, 32);
+    tcg_gen_trunc_i64_tl(dest, rslt);
+
+    if (ctx->opt.f) {
+        tcg_gen_setcond_tl(TCG_COND_EQ, cpu_Zf, dest, ctx->zero);
+        tcg_gen_shri_tl(cpu_Nf, dest, 31);
+        tcg_gen_movi_tl(cpu_Vf, 0);
+    }
+
+    tcg_temp_free_i64(rslt);
+    tcg_temp_free_i64(srcA);
+    tcg_temp_free_i64(srcB);
+
+    return BS_NONE;
+}
+
+/*
+    MPYHU
+*/
+int arc_gen_MPYHU(DisasCtxt *ctx, TCGv dest, TCGv src1, TCGv src2)
+{
+    TCGv_i64    rslt = tcg_temp_new_i64();
+    TCGv_i64    srcA = tcg_temp_new_i64();
+    TCGv_i64    srcB = tcg_temp_new_i64();
+
+    tcg_gen_extu_i32_i64(srcA, src1);
+    tcg_gen_extu_i32_i64(srcB, src2);
+
+    tcg_gen_mul_i64(rslt, srcA, srcB);
+
+    tcg_gen_shri_i64(rslt, rslt, 32);
+    tcg_gen_trunc_i64_tl(dest, rslt);
+
+    if (ctx->opt.f) {
+        tcg_gen_setcond_tl(TCG_COND_EQ, cpu_Zf, dest, ctx->zero);
+        tcg_gen_movi_tl(cpu_Nf, 0);
+        tcg_gen_movi_tl(cpu_Vf, 0);
+    }
+
+    tcg_temp_free_i64(rslt);
+    tcg_temp_free_i64(srcA);
+    tcg_temp_free_i64(srcB);
+
+    return BS_NONE;
+}
+
+/*
+    MPYU
+*/
+int arc_gen_MPYU(DisasCtxt *ctx, TCGv dest, TCGv src1, TCGv src2)
+{
+    TCGv_i64    rslt = tcg_temp_new_i64();
+    TCGv_i64    srcA = tcg_temp_new_i64();
+    TCGv_i64    srcB = tcg_temp_new_i64();
+
+    tcg_gen_extu_i32_i64(srcA, src1);
+    tcg_gen_extu_i32_i64(srcB, src2);
+
+    tcg_gen_mul_i64(rslt, srcA, srcB);
+
+    tcg_gen_trunc_i64_tl(dest, rslt);
+
+    if (ctx->opt.f) {
+        tcg_gen_setcond_tl(TCG_COND_EQ, cpu_Zf, dest, ctx->zero);
+        tcg_gen_movi_tl(cpu_Nf, 0);
+        tcg_gen_shri_i64(rslt, rslt, 32);
+        tcg_gen_trunc_i64_tl(cpu_Vf, rslt);
+        tcg_gen_setcondi_tl(TCG_COND_NE, cpu_Vf, cpu_Vf, 0);
+    }
+
+    tcg_temp_free_i64(rslt);
+    tcg_temp_free_i64(srcA);
+    tcg_temp_free_i64(srcB);
+
+    return BS_NONE;
+}
+
diff --git a/target-arc/translate-inst.h b/target-arc/translate-inst.h
index 811c914..084c282 100644
--- a/target-arc/translate-inst.h
+++ b/target-arc/translate-inst.h
@@ -90,3 +90,8 @@  int arc_gen_RLC(DisasCtxt *c, TCGv dest, TCGv src1);
 int arc_gen_NORMW(DisasCtxt *c, TCGv dest, TCGv src1);
 int arc_gen_NORM(DisasCtxt *c, TCGv dest, TCGv src1);
 
+int arc_gen_MPY(DisasCtxt *c, TCGv dest, TCGv src1, TCGv src2);
+int arc_gen_MPYH(DisasCtxt *c, TCGv dest, TCGv src1, TCGv src2);
+int arc_gen_MPYHU(DisasCtxt *c, TCGv dest, TCGv src1, TCGv src2);
+int arc_gen_MPYU(DisasCtxt *c, TCGv dest, TCGv src1, TCGv src2);
+