diff options
| author | Cherry Zhang <cherryyz@google.com> | 2016-08-30 14:46:25 -0400 |
|---|---|---|
| committer | Cherry Zhang <cherryyz@google.com> | 2016-08-30 23:16:17 +0000 |
| commit | f9dafc742d7c0e892b6e4ff17cb9ec7165887e44 (patch) | |
| tree | db0e07eccf2addc770143a7e3c7e389cb5a52d2a /src/runtime/sys_linux_mips64x.s | |
| parent | b2e0e9688a512970ea8d270238c8ff3bbf85cbe1 (diff) | |
| download | go-f9dafc742d7c0e892b6e4ff17cb9ec7165887e44.tar.xz | |
cmd/compile, runtime, etc: get rid of constant FP registers
On ARM64, MIPS64, and PPC64, some floating point registers were
reserved for constants 0, 1, 2, 0.5, etc. This CL removes them.
On ARM64, they are never used. On MIPS64 and PPC64, the only use
case is a multiplication-by-2 in the old backend of the compiler,
which is replaced with an addition.
Change-Id: I737cbf43283756e3408964fc88c567a938c57036
Reviewed-on: https://go-review.googlesource.com/28095
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Diffstat (limited to 'src/runtime/sys_linux_mips64x.s')
| -rw-r--r-- | src/runtime/sys_linux_mips64x.s | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/src/runtime/sys_linux_mips64x.s b/src/runtime/sys_linux_mips64x.s index d0141bce78..c9e03a24ce 100644 --- a/src/runtime/sys_linux_mips64x.s +++ b/src/runtime/sys_linux_mips64x.s @@ -238,9 +238,6 @@ TEXT runtime·sigtramp(SB),NOSPLIT,$64 SRLV $32, R31, RSB SLLV $32, RSB - // initialize essential registers (just in case) - JAL runtime·reginit(SB) - // this might be called in external code context, // where g is not set. MOVB runtime·iscgo(SB), R1 @@ -328,8 +325,6 @@ TEXT runtime·clone(SB),NOSPLIT,$-8 RET // In child, on new stack. - // initialize essential registers - JAL runtime·reginit(SB) MOVV -32(R29), R16 MOVV $1234, R1 BEQ R16, R1, 2(PC) |