From Lua 5.2: Add math.log(x, base).

2012-10-07 15:47:11 +02:00
parent 0d62e2e1ab
commit 0561a56938
8 changed files with 129 additions and 11 deletions
--- a/src/vm_mips.dasc
+++ b/src/vm_mips.dasc
@@ -1486,7 +1486,19 @@ static void build_subroutines(BuildCtx *ctx)
  |  math_round floor
  |  math_round ceil
  |
-  |  math_extern log
+  |.ffunc math_log
+  |  lw CARG3, HI(BASE)
+  |  li AT, 8
+  |  bne NARGS8:RC, AT, ->fff_fallback	// Exactly 1 argument.
+  |.  load_got log
+  |  sltiu AT, CARG3, LJ_TISNUM
+  |  beqz AT, ->fff_fallback
+  |.  nop
+  |  call_extern
+  |.  ldc1 FARG1, 0(BASE)
+  |  b ->fff_resn
+  |.  nop
+  |
  |  math_extern log10
  |  math_extern exp
  |  math_extern sin