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aarch64: Move x8 out of call_context

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Reduces stack size.  It was only used by the closure, and there
are available argument registers.
This commit is contained in:
Richard Henderson
2014-11-12 09:29:32 +01:00
committed by Richard Henderson
parent a992f8789b
commit 0e41c73b09
3 changed files with 4 additions and 5 deletions
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src/aarch64/sysv.S
+1 -1
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@@ -241,7 +241,6 @@ CNAME(ffi_closure_SYSV):
stp x2, x3, [sp, #16 + 16*N_V_ARG_REG + 16]
stp x4, x5, [sp, #16 + 16*N_V_ARG_REG + 32]
stp x6, x7, [sp, #16 + 16*N_V_ARG_REG + 48]
str x8, [sp, #16 + 16*N_V_ARG_REG + 64]
/* Load ffi_closure_inner arguments. */
ldp x0, x1, [x17, #FFI_TRAMPOLINE_SIZE] /* load cif, fn */
@@ -249,6 +248,7 @@ CNAME(ffi_closure_SYSV):
add x3, sp, #16 /* load context */
add x4, sp, #ffi_closure_SYSV_FS /* load stack */
add x5, sp, #16+CALL_CONTEXT_SIZE /* load rvalue */
mov x6, x8 /* load struct_rval */
bl CNAME(ffi_closure_SYSV_inner)
/* Load the return value as directed. */