From a58b86dad39835841eb6f24e13253c69447abfc9 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 15 Oct 2012 21:23:20 +0200
Subject: PPC: Compile math.sqrt() to fsqrt instruction.

---
 src/lj_asm_ppc.h    | 5 ++++-
 src/lj_target_ppc.h | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lj_asm_ppc.h b/src/lj_asm_ppc.h
index e3cbe5b8..f65eed5a 100644
--- a/src/lj_asm_ppc.h
+++ b/src/lj_asm_ppc.h
@@ -2026,7 +2026,10 @@ static void asm_ir(ASMState *as, IRIns *ir)
   case IR_FPMATH:
     if (ir->op2 == IRFPM_EXP2 && asm_fpjoin_pow(as, ir))
       break;
-    asm_callid(as, ir, IRCALL_lj_vm_floor + ir->op2);
+    if (ir->op2 == IRFPM_SQRT && (as->flags & JIT_F_SQRT))
+      asm_fpunary(as, ir, PPCI_FSQRT);
+    else
+      asm_callid(as, ir, IRCALL_lj_vm_floor + ir->op2);
     break;
 
   /* Overflow-checking arithmetic ops. */
diff --git a/src/lj_target_ppc.h b/src/lj_target_ppc.h
index f5e89325..5347c3f7 100644
--- a/src/lj_target_ppc.h
+++ b/src/lj_target_ppc.h
@@ -263,6 +263,7 @@ typedef enum PPCIns {
   PPCI_FSUB = 0xfc000028,
   PPCI_FMUL = 0xfc000032,
   PPCI_FDIV = 0xfc000024,
+  PPCI_FSQRT = 0xfc00002c,
 
   PPCI_FMADD = 0xfc00003a,
   PPCI_FMSUB = 0xfc000038,
-- 
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