[PATCH v2 2/3] msvcr120: Add expm1.

[Alex Henrie]

Needed for the game Children of a Dead Earth, see
http://childrenofadeadearth.boards.net/thread/112/coade-on-linux-working-1?page=1&scrollTo=524

Signed-off-by: Alex Henrie <alexhenrie24 at gmail.com>
---
 configure.ac                                       |  2 ++
 .../api-ms-win-crt-math-l1-1-0.spec                |  6 ++--
 dlls/msvcr120/msvcr120.spec                        |  6 ++--
 dlls/msvcr120_app/msvcr120_app.spec                |  6 ++--
 dlls/msvcrt/math.c                                 | 36 ++++++++++++++++++++++
 dlls/ucrtbase/ucrtbase.spec                        |  6 ++--
 6 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/configure.ac b/configure.ac
index 5bee74ab96..0362826f40 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2608,6 +2608,8 @@ AC_CHECK_FUNCS(\
 	erff \
 	exp2 \
 	exp2f \
+	expm1 \
+	expm1f \
 	lgamma \
 	lgammaf \
 	llrint \
diff --git a/dlls/api-ms-win-crt-math-l1-1-0/api-ms-win-crt-math-l1-1-0.spec b/dlls/api-ms-win-crt-math-l1-1-0/api-ms-win-crt-math-l1-1-0.spec
index a1668bb8f2..9ed215f0df 100644
--- a/dlls/api-ms-win-crt-math-l1-1-0/api-ms-win-crt-math-l1-1-0.spec
+++ b/dlls/api-ms-win-crt-math-l1-1-0/api-ms-win-crt-math-l1-1-0.spec
@@ -231,9 +231,9 @@
 @ cdecl exp2f(float) ucrtbase.exp2f
 @ cdecl exp2l(double) ucrtbase.exp2l
 @ cdecl -arch=arm,x86_64 expf(float) ucrtbase.expf
-@ stub expm1
-@ stub expm1f
-@ stub expm1l
+@ cdecl expm1(double) ucrtbase.expm1
+@ cdecl expm1f(float) ucrtbase.expm1f
+@ cdecl expm1l(double) ucrtbase.expm1l
 @ cdecl fabs(double) ucrtbase.fabs
 @ cdecl -arch=arm fabsf(float) ucrtbase.fabsf
 @ stub fdim
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index d44812a264..407c86cd49 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -2134,9 +2134,9 @@
 @ cdecl exp2f(float) MSVCR120_exp2f
 @ cdecl exp2l(double) MSVCR120_exp2l
 @ cdecl -arch=arm,x86_64 expf(float) MSVCRT_expf
-@ stub expm1
-@ stub expm1f
-@ stub expm1l
+@ cdecl expm1(double) MSVCR120_expm1
+@ cdecl expm1f(float) MSVCR120_expm1f
+@ cdecl expm1l(double) MSVCR120_expm1l
 @ cdecl fabs(double) MSVCRT_fabs
 @ cdecl -arch=arm,x86_64 fabsf(float) MSVCRT_fabsf
 @ cdecl fclose(ptr) MSVCRT_fclose
diff --git a/dlls/msvcr120_app/msvcr120_app.spec b/dlls/msvcr120_app/msvcr120_app.spec
index 8c3ecfd1d3..8858f43d90 100644
--- a/dlls/msvcr120_app/msvcr120_app.spec
+++ b/dlls/msvcr120_app/msvcr120_app.spec
@@ -1800,9 +1800,9 @@
 @ cdecl exp2f(float) msvcr120.exp2f
 @ cdecl exp2l(double) msvcr120.exp2l
 @ cdecl -arch=arm,x86_64 expf(float) msvcr120.expf
-@ stub expm1
-@ stub expm1f
-@ stub expm1l
+@ cdecl expm1(double) msvcr120.expm1
+@ cdecl expm1f(float) msvcr120.expm1f
+@ cdecl expm1l(double) msvcr120.expm1l
 @ cdecl fabs(double) msvcr120.fabs
 @ cdecl -arch=arm,x86_64 fabsf(float) msvcr120.fabsf
 @ cdecl fclose(ptr) msvcr120.fclose
diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 89c45c794c..ec8e38bd7a 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -2412,6 +2412,42 @@ LDOUBLE CDECL MSVCR120_exp2l(LDOUBLE x)
 }
 
 /*********************************************************************
+ *      expm1 (MSVCR120.@)
+ */
+double CDECL MSVCR120_expm1(double x)
+{
+#ifdef HAVE_EXPM1
+    double ret = expm1(x);
+#else
+    double ret = exp(x) - 1;
+#endif
+    if (!isfinite(ret)) *MSVCRT__errno() = MSVCRT_ERANGE;
+    return ret;
+}
+
+/*********************************************************************
+ *      expm1f (MSVCR120.@)
+ */
+float CDECL MSVCR120_expm1f(float x)
+{
+#ifdef HAVE_EXPM1F
+    double ret = expm1f(x);
+#else
+    double ret = exp(x) - 1;
+#endif
+    if (!isfinite(ret)) *MSVCRT__errno() = MSVCRT_ERANGE;
+    return ret;
+}
+
+/*********************************************************************
+ *      expm1l (MSVCR120.@)
+ */
+LDOUBLE CDECL MSVCR120_expm1l(LDOUBLE x)
+{
+    return MSVCR120_expm1(x);
+}
+
+/*********************************************************************
  *      log2 (MSVCR120.@)
  */
 double CDECL MSVCR120_log2(double x)
diff --git a/dlls/ucrtbase/ucrtbase.spec b/dlls/ucrtbase/ucrtbase.spec
index 017f086fc1..0d799fd2ae 100644
--- a/dlls/ucrtbase/ucrtbase.spec
+++ b/dlls/ucrtbase/ucrtbase.spec
@@ -2277,9 +2277,9 @@
 @ cdecl exp2f(float) MSVCR120_exp2f
 @ cdecl exp2l(double) MSVCR120_exp2l
 @ cdecl -arch=arm,x86_64 expf(float) MSVCRT_expf
-@ stub expm1
-@ stub expm1f
-@ stub expm1l
+@ cdecl expm1(double) MSVCR120_expm1
+@ cdecl expm1f(float) MSVCR120_expm1f
+@ cdecl expm1l(double) MSVCR120_expm1l
 @ cdecl fabs(double) MSVCRT_fabs
 @ cdecl -arch=arm fabsf(float) MSVCRT_fabsf
 @ cdecl fclose(ptr) MSVCRT_fclose
-- 
2.13.2