Changeset 96279 in vbox for trunk/src/VBox/Runtime/common/math

Timestamp:

Aug 18, 2022 12:07:28 AM (3 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

153093

Message:

IPRT/nocrt: Implemented log2f and added testing of log2 and log2f. bugref:10261

File:

• trunk/src/VBox/Runtime/common/math/log2f.asm (copied) (copied from trunk/src/VBox/Runtime/common/math/log2.asm ) (7 diffs)

trunk/src/VBox/Runtime/common/math/log2f.asm

@@ -1 +1 @@
 ; $Id$
 ;; @file
-; IPRT - No-CRT log2 - AMD64 & X86.
+; IPRT - No-CRT log2f - AMD64 & X86.
 ;
 
@@ -36 +36 @@
 
 ;;
-; Compute the log2 of rd
+; Compute the log2f of rf
 ; @returns st(0) / xmm0
-; @param    rd      [xSP + xCB*2] / xmm0
-RT_NOCRT_BEGINPROC log2
+; @param    rf      [xSP + xCB*2] / xmm0
+RT_NOCRT_BEGINPROC log2f
         push    xBP
         SEH64_PUSH_xBP
@@ -52 +52 @@
         ;
 %ifdef RT_ARCH_AMD64
-        movsd   [xBP - 10h], xmm0
-        fld     qword [xBP - 10h]
-%else
-        fld     qword [xBP + xCB*2]
+        movss   [xBP - 10h], xmm0
+        fld     dword [xBP - 10h]
+%else
+        fld     dword [xBP + xCB*2]
 %endif
 
@@ -118 +118 @@
 .return_val:
 %ifdef RT_ARCH_AMD64
-        fstp    qword [xBP - 10h]
-        movsd   xmm0, [xBP - 10h]
+        fstp    dword [xBP - 10h]
+        movss   xmm0, [xBP - 10h]
 %endif
 .return:
@@ -153 +153 @@
         ; Load NaN
 %ifdef RT_ARCH_AMD64
-        movsd   xmm0, [.s_r64NaN xWrtRIP]
-%else
-        fld     qword [.s_r64NaN xWrtRIP]
+        movss   xmm0, [.s_r32NaN xWrtRIP]
+%else
+        fld     dword [.s_r32NaN xWrtRIP]
 %endif
         jmp     .return
@@ -179 +179 @@
         ; Load +Inf
 %ifdef RT_ARCH_AMD64
-        movsd   xmm0, [.s_r64MinusInf xWrtRIP]
-%else
-        fld     qword [.s_r64MinusInf xWrtRIP]
+        movss   xmm0, [.s_r32MinusInf xWrtRIP]
+%else
+        fld     dword [.s_r32MinusInf xWrtRIP]
 %endif
         jmp     .return
@@ -210 +210 @@
 .s_r64AbsFyL2xP1InputMax:
         dq      1.292
-;.s_r64AbsFyL2xP1Range:
-;        dq      0.292
-.s_r64MinusInf:
-        dq      RTFLOAT64U_INF_MINUS
-.s_r64NaN:
-        dq      RTFLOAT64U_QNAN_MINUS
-ENDPROC   RT_NOCRT(log2)
-
+.s_r32MinusInf:
+        dd      RTFLOAT32U_INF_MINUS
+.s_r32NaN:
+        dd      RTFLOAT32U_QNAN_MINUS
+ENDPROC   RT_NOCRT(log2f)
+