gcc/clang CPP symbols for SSE math
Posted by Anonymous on Tue 13th Sep 2022 19:08
raw | new post

#!/bin/ksh93

#
# print the C preprocessor symbols used by SSE
#

builtin cat
compound c

c.compiler="gcc"

c.s1="$( ${c.compiler} -E -dM -m32 - < /dev/null | sort )"
c.s2="$( ${c.compiler} -E -dM -m32 -mfpmath=sse -msse2 - < /dev/null | sort )"

diff -u <(cat <<<"${c.s1}") <(cat <<<"${c.s2}")
# EOF.

rmainz@derfwpc5131:~/work/math_sse_test$ ksh test_math_sse.ksh
--- /dev/fd/3   2022-09-13 20:01:30.993682803 +0200
+++ /dev/fd/4   2022-09-13 20:01:30.993682803 +0200
@@ -133,8 +133,8 @@
 #define __FLT_DENORM_MIN__ 1.40129846432481707092372958328991613e-45F
 #define __FLT_DIG__ 6
 #define __FLT_EPSILON__ 1.19209289550781250000000000000000000e-7F
-#define __FLT_EVAL_METHOD__ 2
-#define __FLT_EVAL_METHOD_TS_18661_3__ 2
+#define __FLT_EVAL_METHOD__ 0
+#define __FLT_EVAL_METHOD_TS_18661_3__ 0
 #define __FLT_HAS_DENORM__ 1
 #define __FLT_HAS_INFINITY__ 1
 #define __FLT_HAS_QUIET_NAN__ 1
@@ -247,6 +247,7 @@
 #define __LONG_LONG_WIDTH__ 64
 #define __LONG_MAX__ 0x7fffffffL
 #define __LONG_WIDTH__ 32
+#define __MMX__ 1
 #define __NO_INLINE__ 1
 #define __ORDER_BIG_ENDIAN__ 4321
 #define __ORDER_LITTLE_ENDIAN__ 1234
@@ -289,6 +290,10 @@
 #define __SIZEOF_WINT_T__ 4
 #define __SIZE_TYPE__ unsigned int
 #define __SIZE_WIDTH__ 32
+#define __SSE__ 1
+#define __SSE2__ 1
+#define __SSE2_MATH__ 1
+#define __SSE_MATH__ 1
 #define __STDC__ 1
 #define __STDC_HOSTED__ 1
 #define __STDC_IEC_559__ 1