chapter 3: reading excercises + attacklab

1 files changed, 29 insertions, 0 deletions

diff --git a/3/11_floating_point/53_funct1.c b/3/11_floating_point/53_funct1.c
new file mode 100644
index 0000000..8147b62
--- /dev/null
+++ b/3/11_floating_point/53_funct1.c
@@ -0,0 +1,29 @@
+typedef arg1_t int;
+typedef arg2_t double;
+typedef arg3_t double;
+
+typedef arg4_t double;
+double funct1(arg1_t p, arg2_t q, arg3_t r, double s)
+{
+    return p/(q+r) - s;
+}
+// funct 1:
+//      vcvtsi2ssq      %rsi, %xmm2, %xmm2          convert long to double?
+//      vaddss          %xmm0, %xmm2, %xmm0         xmm0 <- xmm2 + xmm0 (q+r)
+//      vcvtsi2ss       %edi, %xmm2, %xmm2          convert to float (p)
+//      vdivss          %xmm0, %xmm2, %xmm0         xmm0 <- xmm2 (p float) / xmm0 (q+r float)
+//      vunpcklps       %xmm0, %xmm0, %xmm0         convert float to double?
+//      vcvtps2pd       %xmm0, %xmm0                convert float to double?
+//      vsubsd          %xmm1, %xmm0, %xmm0         xmm0 <- xmm0 - (double) s?
+//      ret
+
+// s must be in xmm1, it's only used at the end to subtract from xmm0, it must also be double since vsubsd is used
+//
+// p                                q                   r                   q+r                 p/(q+r)
+// rdi, int, since it's             xmm0, float         rsi, long           float, xmm0         float, xmm0
+//      converted
+//      on line 3
+//
+// rdi, int, since it's             rsi, long          xmm0, float          float, xmm0         float, xmm0
+//      converted
+//      on line 3