diff options
| author | Mark H Weaver <mhw@netris.org> | 2013-08-03 15:05:59 -0400 |
|---|---|---|
| committer | Mark H Weaver <mhw@netris.org> | 2013-08-03 15:05:59 -0400 |
| commit | 4fa65b903bd0ad5ed62dca92df71325c0a110809 (patch) | |
| tree | 7e422b2b00abcd24c87155af6ba8deefead1bbcb | |
| parent | 9f6211707b186e182aa1debfb52323bfa9fd26de (diff) | |
| download | guile-4fa65b903bd0ad5ed62dca92df71325c0a110809.tar.gz | |
VM: Add ASM_MUL for x86.
* libguile/vm-i-scheme.c (ASM_MUL): New macro.
(mul): Use ASM_MUL if available.
| -rw-r--r-- | libguile/vm-i-scheme.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/libguile/vm-i-scheme.c b/libguile/vm-i-scheme.c index ad884def7..90a4c1106 100644 --- a/libguile/vm-i-scheme.c +++ b/libguile/vm-i-scheme.c @@ -287,6 +287,26 @@ VM_DEFINE_FUNCTION (149, ge, "ge?", 2) slow_sub: \ do { } while (0) +# define ASM_MUL(x, y) \ + { \ + scm_t_signed_bits xx = SCM_I_INUM (x); \ + asm volatile goto ("mov %1, %%"_CX"; " \ + "test %[tag], %%cl; je %l[slow_mul]; " \ + "sub %[tag], %%"_CX"; " \ + "test %[tag], %0; je %l[slow_mul]; " \ + "imul %2, %%"_CX"; jo %l[slow_mul]; " \ + "add %[tag], %%"_CX"; " \ + "mov %%"_CX", (%[vsp])\n" \ + : /* no outputs */ \ + : "r" (x), "r" (y), "r" (xx), \ + [vsp] "r" (sp), [tag] "i" (scm_tc2_int) \ + : _CX, "memory", "cc" \ + : slow_mul); \ + NEXT; \ + } \ + slow_mul: \ + do { } while (0) + #endif @@ -356,16 +376,20 @@ VM_DEFINE_FUNCTION (153, sub1, "sub1", 1) RETURN (scm_difference (x, SCM_I_MAKINUM (1))); } -# undef ASM_ADD -# undef ASM_SUB - VM_DEFINE_FUNCTION (154, mul, "mul", 2) { ARGS2 (x, y); +#ifdef ASM_MUL + ASM_MUL (x, y); +#endif SYNC_REGISTER (); RETURN (scm_product (x, y)); } +# undef ASM_ADD +# undef ASM_SUB +# undef ASM_MUL + VM_DEFINE_FUNCTION (155, div, "div", 2) { ARGS2 (x, y); |