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[Qemu-devel] [PATCH 01/14] target-tilegx: Use V1 in simd_helper.c
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 01/14] target-tilegx: Use V1 in simd_helper.c |
Date: |
Thu, 1 Oct 2015 12:38:33 +1000 |
This will tidy up lots of cases where we'll want
to replicate a byte across the 8 elements of the word.
Signed-off-by: Richard Henderson <address@hidden>
---
target-tilegx/simd_helper.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/target-tilegx/simd_helper.c b/target-tilegx/simd_helper.c
index b931929..774def4 100644
--- a/target-tilegx/simd_helper.c
+++ b/target-tilegx/simd_helper.c
@@ -23,12 +23,16 @@
#include "exec/helper-proto.h"
+/* Broadcast a value to all elements of a vector. */
+#define V1(X) (((X) & 0xff) * 0x0101010101010101ull)
+
+
uint64_t helper_v1shl(uint64_t a, uint64_t b)
{
uint64_t m;
b &= 7;
- m = 0x0101010101010101ULL * (0xff >> b);
+ m = V1(0xff >> b);
return (a & m) << b;
}
@@ -37,7 +41,7 @@ uint64_t helper_v1shru(uint64_t a, uint64_t b)
uint64_t m;
b &= 7;
- m = 0x0101010101010101ULL * ((0xff << b) & 0xff);
+ m = V1(0xff << b);
return (a & m) >> b;
}
--
2.4.3
- [Qemu-devel] [PATCH 00/14] Collected tilegx patches, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 07/14] target-tilegx: Implement complex multiply instructions, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 09/14] linux-user/syscall_defs.h: Sync the latest si_code from Linux kernel, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 01/14] target-tilegx: Use V1 in simd_helper.c,
Richard Henderson <=
- [Qemu-devel] [PATCH 03/14] target-tilegx: Implement v*add and v*sub instructions, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 13/14] target-tilegx: Fix a typo for mnemonic about "ld_add", Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 14/14] target-tilegx: Handle nofault prefetch instructions, Richard Henderson, 2015/10/08
- Message not available
- [Qemu-devel] [PATCH 11/14] target-tilegx: Decode ill pseudo-instructions, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 12/14] target-tilegx: Use TILEGX_EXCP_SIGNAL instead of TILEGX_EXCP_SEGV, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 04/14] target-tilegx: Implement v1multu instruction, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 02/14] target-tilegx: Implement v*shl, v*shru, and v*shrs instructions, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 06/14] target-tilegx: Implement table index instructions, Richard Henderson, 2015/10/08
- [Qemu-devel] [PATCH 10/14] linux-user/tilegx: Implement tilegx signal features, Richard Henderson, 2015/10/08