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[Qemu-devel] [PATCH 3/5] target-arm: Add ARM UDIV/SDIV support
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 3/5] target-arm: Add ARM UDIV/SDIV support |
Date: |
Wed, 28 Sep 2011 18:27:31 +0100 |
Add support for UDIV and SDIV in ARM mode. This is a new optional
feature for A profile cores (Thumb mode has had UDIV and SDIV for
M profile cores for some time).
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/translate.c | 19 +++++++++++++++++++
1 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/target-arm/translate.c b/target-arm/translate.c
index e99fc18..d3d7c5c 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -7639,6 +7639,25 @@ static void disas_arm_insn(CPUState * env, DisasContext
*s)
store_reg(s, rn, tmp);
}
break;
+ case 1:
+ case 3:
+ /* SDIV, UDIV */
+ if (!arm_feature(env, ARM_FEATURE_DIV)) {
+ goto illegal_op;
+ }
+ if (((insn >> 5) & 7) || (rd != 15)) {
+ goto illegal_op;
+ }
+ tmp = load_reg(s, rm);
+ tmp2 = load_reg(s, rs);
+ if (insn & (1 << 21)) {
+ gen_helper_udiv(tmp, tmp, tmp2);
+ } else {
+ gen_helper_sdiv(tmp, tmp, tmp2);
+ }
+ tcg_temp_free_i32(tmp2);
+ store_reg(s, rn, tmp);
+ break;
default:
goto illegal_op;
}
--
1.7.1
- [Qemu-devel] [PATCH 0/5] target-arm: Implement UDIV/SDIV and fused multiply-accumulate, Peter Maydell, 2011/09/28
- [Qemu-devel] [PATCH 5/5] target-arm: Implement VFPv4 fused multiply-accumulate insns, Peter Maydell, 2011/09/28
- [Qemu-devel] [PATCH 3/5] target-arm: Add ARM UDIV/SDIV support,
Peter Maydell <=
- [Qemu-devel] [PATCH 1/5] softfloat: Reinstate accidentally disabled target-specific NaN handling, Peter Maydell, 2011/09/28
- [Qemu-devel] [PATCH 2/5] target-arm: v6 media multiply space: UNDEF on unassigned encodings, Peter Maydell, 2011/09/28
- [Qemu-devel] [PATCH 4/5] softfloat: Implement fused multiply-add, Peter Maydell, 2011/09/28
- Re: [Qemu-devel] [PATCH 0/5] target-arm: Implement UDIV/SDIV and fused multiply-accumulate, Blue Swirl, 2011/09/28